Flight Diversions, Liquid Spills and Lost Data

Flight Diversions, Liquid Spills and Lost Data

Here at Drive Rescue, liquid or water damaged MacBooks is a perennial problem we encounter. In fact, accidentally spilt water, tea, soft drinks, coffee or beer is a such a common problem that Apple has strategicially placed around 8 or 10 “liquid contact indicators” on the logicboard of their MacBook and MacBook Air devices to detect spillage events. Seemingly, these sensors save their technicians a lot of time when it comes to diagnosing systems and assists them in deciding whether an Apple Care warranty has been invalidated by a spill.     

We recently helped a customer who experienced such an event. They spilt water on their MacBook Air (2014). They attempted to dry it out using a towel, cotton ear buds and even placed it in a basin of uncooked rice. However, despite their valiant attempts, their cleanup travails did not work. When they powered on their system, all they got was the dreaded White Screen of Death.

This incident could have happened to anyone. In fact recently, it was reported in the Irish media that an Airbus A330 pilot en route from Frankfurt to Cancun had to make an unplanned diversion to Shannon Airport because one of the pilots accidentally knocked his coffee cup onto the cockpit controls!

On recommendation of a colleague, our customer delivered the damaged MacBook Air to us. In the disk bay, we found a third-generation Samsung SSD (Model: MZ-JPV256). This disk uses a 12+16 connector and a PCIe 2.0 X 2 interface. Using a custom PCIe adaptor for Apple SSDs, we connected the disk our data recovery system. Dead as a dodo. After some further diagnostics, we discovered a short circuit on the disk’s PCB. This was remedied, but the disk was still not fully intitialising. Finally, after putting the disk into “technological mode”, we were able to access the HFS+ volume and retrieve the data (Word, PowerPoint, PDFs, .AVI and.VEG files)  

At least the customer could console themselves that the data recovery from their water damaged MacBook probably cost a fraction of what it costs to clean up the instrument panel of a multi-million euro A330 aircraft!

Data recovery of dictaphone recordings from an Iomega Go Portable Disk which was appearing as “not accessible” in Windows 10.

Data recovery from Iomega Go portable disk

The user tried to access the disk on several computers, but kept on receiving a message that their disk was “not accessible” followed by a message “You need to format the disk in drive E: before you can use it. Do you want to format it?” We opened up the plastic enclosure and found a Samsung HM100UI 2.5” 1TB disk.  

We attached it to our recovery systems. The MBR (Master Boot Record) could not be read at all. Further diagnostics revealed that one of the disk-heads was not reading. Using firmware manipulation tools, we disabled the faulty head and used specialised equipment to image the NTFS volume in PIO mode (a very slow data transfer mode). The files needed by the client Excel files and .DSS audio files from their Olympus dictaphone were all successfully recovered.

Adata (HV620S) External Hard causing Not Responding Errors in Windows 10 and no data showing.

A customer recently delivered their Adata HV620S external hard disk to us. When they plugged the 2TB disk into their Windows 10 PC, they received the error message “Not Responding”. The disk made their whole Windows 10 PC freeze and they could not access any data. They even tried to run the Checkdisk utility to fix the disk, but that too froze half-way through. Could Drive Rescue help? Of course, we have successfully recovered data from several Adata external hard disks before (such as the HD650 and HD710) and we were sure this model would be no exception!

We removed the disk from it’s plastic enclosure and found a Samsung Momentus ST2000LM003 S-ATA disk.  Our diagnosis revealed several translator issues and over 73,000 bad sectors. The translator plays a crucial role in the management of the disk’s data. And the disk sectors play an equally important role storing actual bytes of data. We resolved these problems within a couple of hours.

External Hard Disks and “Not Responding” error messages

Our customer wanted to know “why did Windows display the ‘not responding’ error message” every time the disk was connected to their computer?” The reason is simple.  Windows was not designed to work with disks that are failing. Windows (and MacOS for that matter) were designed with the underlying assumption that the attached storage device(s) are good.  

Why Checkdisk (CHKDSK) Cannot Fix Hard Disks

Our customer also wanted to know why the Checkdisk utility built into Windows could not fix the disk. Well, this utility was primarily designed by Microsoft to fix file system errors (FAT and NTFS) and to mark disk bad sectors. It was never designed to fix disk firmware or hardware issues. In fact, for a lot of disk issues, Checkdisk can do more harm than good. So, Checkdisk freezing during an attempted repair volume operation was probably a blessing in disguise!

Anyway, all the customer’s RW2 files (Panasonic Lumix RAW), .DOCX, XLSX and .PPTX files were all successfully recovered onto a new external hard disk. The relieved customer left our offices vowing never to trust a single hard disk with their valuable data ever again!   

Drive Rescue offers a full data recovery and repair service from Adata external hard disks in Ireland. We have previously recovered from models such as the HD650, HD700, HD710 and HD720. www.datarecoverydublin.ie

The story of an electric scooter, a steel fabricator and data recovery from a Toshiba hard disk

A structural designer for a steel fabrication company recently contacted us who experienced a rather unfortunate data loss event. He had been using his Acer laptop in his van to access his Strumis steel fabrication design application before visiting a site. He got interrupted by a phone call, closed the lid of his laptop and placed it on the passenger seat. The phone call ended and he drove off. However, 15 minutes later, when traversing a busy intersection an electric scooter sped off the footpath veering directly into his path. This necessitated some hard braking. This caused his Acer laptop to take flight into the van’s footwell as Mr. Speedy Gonzales scooter driver disappeared down the road.

With much trepidation he opened the lid of the laptop. The screen was ok, but they system had now turned itself off. He powered his Windows 10 system back on only to receive the message:

“Your PC couldn’t start properly. A required device isn’t connected or can’t be accessed”

Upon multiple restarts, this message came up repeatedly. He took the laptop to his company’s IT support department who could not access his files either. They recommended Drive Rescue.  


Our diagnostics revealed that one of the read-write heads had failed. This problem was not helped be the fact that the laptop was switched on during the fall.

“A hard disk that is on when it falls will cause more damage”

The user was very unlucky in this case because, at the time of the fall, their laptop system was still on and hard disk was still spinning. A hard disk that is on (i.e. spinning) when it falls will always incur more damage. This is because the disk-heads will literally crash into the disk platters damaging themselves and in worst case scenarios scouring areas of the platter which hold data. If the laptop had been switched off before the fall – the user might not have needed a data recovery service at all. This is because, for most modern 2.5” and 3.5” S-ATA hard disks, when the disk is turned off the disk-heads are safely parked on the drive ramp. This is like a special “safe” area where heads can park when not in use.

Data recovery from (MK7575GSX) 750GB Toshiba hard disk

In another sense, this user was extremely lucky as platter damage was minimal. In our Class-100 clean room, we used a customised “head-comb” designed for the “MK” series of Toshiba disk, to gently remove the damaged Head Disk Assembly (HDA) from the chassis. Here extreme care must be taken to avoid any contact that the heads or HDA might have with the platters. Once removed, we inserted a new exact-match HDA locking it into place with the security pin. Once the main chamber was closed, we imaged the disk slowly.

The resulting recovery was very pleasing with 97% of files (Word, Excel, .JPEG and .BSWX Strumis files) being recovered. Months of steel fabrication designs for new building projects across Ireland were reunited with their thrilled creator. And hours of painstaking drawing reconstruction work were saved.

Drive Rescue, Dublin Ireland offer a complete data recovery service for Toshiba 2.5″ and 3.5″ hard disks. We have successfully recovered from models such as the MQ01ABD050, MQ01ACF050, MQ01ABD100, MK3275GSX, MK5075GSX, MK5059GSXP, DT01ACA200, DR01ACA050, P300, L200 (500GB, 1TB and 2TB Mobile Hard Disk), X300 and most models of Toshiba Canvio USB external disk http://www.datarecoverydublin.ie

Can Apple’s Hardware Test Detect Hard Disk Failure?

Like an increasing number of computer manufacturers, Apple includes a built-in hardware diagnostic test in their systems to help users or system administrators diagnose hardware faults. Apple Hardware Test (previously, Apple Diagnostics) comes in short and long variants, will mildy stress components such as an iMac or MacBook’s processor, logic board controller, fan motor, RAM modules and of course the hard disk. For the latter, you would hope that the test is fairly accurate so that your (or your user’s data) is not put in jeopardy.

What does “4HDD/11/40000000: SATA (0,0)” mean?

When Apple Hardware Test does detect a fault with your disk, it will display the rather cryptic error code “4HDD/11/40000000: SATA (0,0)”. This basically means that the AHT has discovered that your hard disk is failing.

How Accurate is Apple’s Hardware Test when testing a hard drive?

But, unfortunately, Drive Rescue has come across a substantial number of cases where the Apple Hardware test (short and long versions) did not detect a fault even when a hard disk was failing.

There are several reasons Apple’s in-built disk diagnostic utility cannot be relied upon:

  • Apple’s Hardware Test performs a random scan of the tracks of your hard disk. It does not scan your whole hard disk. The test could easily miss sectors of your disk which are failing.

  • Apple’s Hardware Test cannot detect firmware problems.

  • Apple’s Hardware Test will not always be successful in determining weak or unstable read/write heads. Often, during tests, random reads are short. In real-life, reads of contigious files can take much longer stressing the disk- heads much more.  

  • Apple’s Hardware Test cannot detect electronic issues with your disk’s PCB.

  • Apple’s Hardware Test cannot detect whether you have a corrupt HFS+ or APFS partition table.

In summary, the in-built testing hard disk which Apple provides with their iMac, MacBook and Mac Mini systems is just rudimentary disk diagnostic tool. It should not be regarded as infallible litmus test of a hard disk’s health.

Drive Rescue Dublin offer a complete data retrieval service for Apple Mac computers in Dublin. We recover data from dead iMacs, MacBooks, MacBook Air and Mac Minis. http://www.datarecoverydublin.ie. Prompt and professional service.

Data retrieval from Lenovo Carbon X1 laptop showing “Inaccessible Boot Device” error message

We recently had a customer who, when attempting to boot their Lenovo Carbon X1 laptop running Windows 10 laptop, got the “Inaccessible Boot Device” error message.

We removed the MZ-HPV2560 SSD from the laptop’s motherboard. The connection interface of the hard disk was proprietary. Using a specialised Lenovo Carbon X1 PCIe to S-ATA adaptor, we connected the SSD to one of our data recovery systems. However, the Windows volume on the disk still did not mount.    

The MZ-HPV2560 SSD is really a Lenovo rebadged version of the SM951. The disk uses a native Samsung SSD S4LN058A01 controller and uses 16nm MLC NAND. Surprisingly, this solid state disk does not use NVMe.

After some disk diagnostics, we discovered that some microcode modules used in the controller were corrupt. We put the disk into technological mode and using highly-specialised SSD data recovery equipment repaired the corrupted modules.

The client needed several hundred .ODT (OpenOffice Writer) and .ODS (OpenOffice Calc) files recovered as part of a research project. These were all put on a USB stick and reunited with their over-joyed creator.    

If you need to recover data from a Lenovo laptop or a Samsung SM951 SSD disk, we can help you. Drive Rescue have been recovering data in in Dublin Ireland since 2007. Our clients are based throughout Ireland including Dublin, Cork, Limerick, Galway, Ennis, Kilkenny, Carlow, Waterford, Wexford and Dundalk www.datarecoverydublin.ie  

Data Recovery from Dell XPS desktop using RAID 0

We recently recovered data from two       S-ATA disks removed from a Dell XPS desktop. The two Seagate Barracuda (ST31500341AS) disks were configured in RAID 0 mode. Instead of using a hardware RAID controller such as PERC or Adaptec card, the host system was using RAID BIOS. This type of RAID utilises the BIOS along with Intel chipset software (installed on the operating system) to manage the RAID.

Our hard disk diagnostic tests revealed that disk # 0 was in rude health. However, disk # 1 had defective read/write heads #2 and #3. The disk heads are a crucial component of an electro-mechanical hard disk as they read the data from the disk platters. When two or more heads fail, the only way to recover all the data is to remove the head-disk assembly and replace it with a part of the exact same specification. Near-matchs will not suffice. In this case, we already had a donor HDA in stock.

The Process

We opened up the faulty Seagate 1.5TB    S-ATA disk in our clean-room and used a device known as a “head-comb” to carefully remove the head disk assembly from the disk chassis. The new head-disk assembly was delicately inserted and was then secured using a Torx screwdriver. Just the right amount of torque pressure needs to be applied – too much or too little can result in the head-disk assembly mis-aligning with the platters. The disk then had to be slowly imaged (onto another disk) which would be used in the next stage of the recovery process. It is always preferable to work with disk images as opposed to the original disks to maintain data integrity.

The RAID rebuild process

With disk images of disk 0 and disk 1 attached to our RAID data recovery system, we started the rebuild process. After determining the block order and block size and other parameters, we inputted these into our RAID data recovery system. The rebuild process started and 6.5 hours later and we had a complete and fully mountable NTFS volume. Using random sampling, we checked the integrity of files. Word, Excel, PDFs and Jpegs all opened up perfectly.

Notes on this case

Dell brought out their XPS range of desktops aimed fairly and squarely targeted at the consumer market. A substantial number of the mid-to-high-end models in this range (from around 2008 to 2014) came with RAID 0 (in a two-disk configuration) enabled by default. So, while some owners are (understandably) comforted by the fact that their system has two disks instead of a paltry one, not all realise these disks are joined at the hip using RAID 0. Dell really should have put a health warning sticker on these systems. “Dear User, You have two disks inside your system in RAID 0 configuration. This is for a larger storage volume and should not be considered a backup…”

Data recovery from WD My Cloud Personal Cloud Storage

We recently helped a Dublin marketing company recover data from their Western Digital EX2 My Cloud Personal Storage drive. The NAS device was no longer recognised on their network. Unfortunately, it stored marketing materials for several clients stored on it which was not backed up elsewhere. File types which needed recovery included .INDD files (InDesign), .PSD (PhotoShop), .HTML, .MOV and .JPEG files. They really needed these files salvaged and fast!

While WD My Cloud storage devices are popular and relatively reliable, occasionally things can go wrong.

Why your WD My Cloud NAS is no longer recognised

  • The EXT4 file system which your My Cloud device is using has gone corrupt.
  • The RAID array has degraded. Depending on your model of My Cloud, some of these devices can be put in RAID configurations of 0,1,5,10 or in JBOD mode. When the RAID array fails or degrades the My Cloud device will no longer be recognised by your network or on client computers.
  • One or more of your disks has head disk assembly issues.
  • One or more of the disks has firmware issues which is causing your device to be unrecognised.
  • One or more of the disks have extensive bad sector issues.
  • Your My Cloud device may have a damaged PCB (controller board) due to a power surge.

In this particular case, the users tried to access their My Cloud data but kept on receiving the error message:

 “We’ve detected that you may not be able to recognize the device on your network”.  

The 6TB disk (WD60EFRX) which we removed from their My Cloud EX2 device had firmware issues and extensive bad sectors. We first resolved the firmware issues (corrupt translator) and then proceeded to resolve the bad sector issues. We succeeded in an 98% recovery rate.  The workflow of our delighted client was not interrupted and their reputation for delivering quality work, on-time was kept intact.

Need to retrieve data from a My Cloud drive? Drive Rescue Data Recovery Dublin (Ireland) offer a complete data recovery for all WD My Cloud NAS devices, including the DL4100, DL2100, EX4, EX2 Ultra, Mirror Gen2, WD My Cloud Mirror and PR2100. Phone us on 1890 571 571 or visit www.datarecoverydublin.ie or www.nasrecovery.ie

Musings from EmbeddedWorld 2019, Nuremberg, Germany.

Recently, Drive Rescue were in Nuremberg, Germany, attending EmbeddedWorld 2019. While this event primarily caters for electronic systems, edge computing, IoT and energy efficiency, it also hosts a number of storage device manufacturers.

NAND, NAND, NAND – it’s everywhere

In fact, one could hardly walk 20 metres in the exhibition halls without encountering NAND memory in some form or another, from either systems integrators or the manufacturers themselves. The latter were displaying NAND in more visible forms, such as in USB devices and SSDs.

Some the SSD interface makes a big difference – as demonstrated by SSD manufacturer Hagiwara Solutions (Japan)

From Industrial machines to torpedoes

The affable team from Transcend explained how their NAND-based memory products are widely used in everything from industrial machinery, slot machines, robotics to torpedoes. These are areas not normally associated with “boring” storage. Transcend are suppliers to Kuka, one of the world’s largest robotics manufacturers, whose robots are used in everything from car manufacture to nuclear decommissioning.

High-quality NAND is essential in applications such as these – for example, a robot will constantly read and write to NAND memory. (Transcend recommends using its “SuperMLC” NAND, which is MLC memory designed to emulate the reliability of SLC, for uses such as these.) Likewise, durable NAND is essential for medical devices that use logging capabilities, such as heart rate monitors.  I asked the Transcend team what sets them apart from the competition and the emphatic answer was “quality control”.

A Transcend SSD with S-ATA interface

What butchers and NAND suppliers have in common…

Transcend source NAND wafers from either Samsung or SanDisk. A wafer is like a large sheet of NAND. The best quality NAND chips (or prime cuts) are in the centre with the lower-quality NAND chips (offal) residing at the fringes. Transcend only use prime cuts of NAND for their memory products. (Low-quality NAND probably ends up in generic USB sticks sold on eBay or in SD cards sold in street markets.) Once cut. the company use an extensive four-stage testing process to weed out any defective NAND. This is important if your NAND is being used for torpedo guidance systems. However, even with stringent quality control processes, people still lose data. The Transcend team explained how human error is the biggest cause of failure for their SD cards. For example, they manufacture consumer-level dash cams. For those motorists unlucky enough to be involved in an accident, their first instinct is to seize evidence of the event. So, with their dash cam still running, they pull the card out and, ironically, end up corrupting the very information they want to preserve. Murphy’s Law in extremis.

Commercial / Industrial Grade SSDs from ACPI

And talking of data preservation on NAND, the Taiwanese SSD manufacturer ACPI sees sudden power loss as a major issue for industrial PC, enterprise servers and professional grade photo systems. This can still occur even with a UPS deployed. For this reason, ACPI has brought out its “Power Shield” technology for its SSDs. This protects a data write even during total power loss. Capacitors store a residual voltage which enables any tunnelling electrons in the floating gate to reach their destination safely.

Some NAND storage devices from Sony including their SxS Pro+ memory card (extreme left)

Sony enters the consumer and industrial SSD market

Sony was a surprise exhibitor at EmebeddedWorld 2019. While not normally associated with SSDs, it has been dabbling in solid-state storage for quite a while. (Primarily sourcing its NAND from Toshiba and controllers from Phison.) Sony’s USB memory sticks and SD cards have been on the market in Ireland for a number of years. Many readers of this blog might be familiar with its  distinctive “Memory Stick Duo” cards that were first introduced on the market circa 1998, in the nascent days of digital photography. Those involved in professional TV and film production who use Sony kit will probably be familiar with its SxS cards for professional grade camera equipment. These cards, now called SxS Pro+, are still being produced by Sony and offer capacities of up to 256GB, offering write speeds of up to 400MB/s. For commercial/industrial customers, Sony now offers a range of M.2 SSDs optimised for heavy-duty use. It will shortly be introducing external SSDs for the consumer market with USB-C interface and capacities of up to 960GB.

Toshiba – the inventors of NAND

Before floating-gate technology was invented, semiconductor design had to rely on EPROM and EEPROM. But both of these technologies were relatively slow and could only store the most basic of information. That was until 1984, when Fujio Masuoka of Toshiba came along and wrote a research paper on a revolutionary type of memory design called NAND. Toshiba’s first NAND went to market in 1989 and the rest is history. NAND has been getting denser, faster and more capacious with every new iteration.   

Toshiba now use BiCS 3D NAND in their SSD and storage products

3D NAND Fever

The current iteration of NAND that Toshiba is marketing is its 64-layer 3D BICS NAND. One of the Toshiba team described how the market is now in a state of “3D fever, as everyone wants a piece of the 3D NAND action. Toshiba is currently using 15nm 64-layer 3D TLC “Bics” NAND in the majority of its SSD devices. According to Toshiba, its “charge-trap” technology is more reliable than “floating-gate” (which is actually a technology from the 1970s). The latter transistor design holds electrons like “water in a glass”, whereas “charge-trap” technology is “more like a sponge”. The electrons are less likely to leak and, therefore, more likely to maintain the integrity of your data. The next iteration that Toshiba expects to commercialise is its 96-layer 4-Bit QLC NAND later on this year.

Although Toshiba is known for inventing NAND, they still manufacture mechanical hard disk drives. (In fact, Toshiba’s hard disk and SSD operations have now been spun into two separate divisions). With the current trend for Big Data analytics and virtualised storage systems, Toshiba is adapting its product lines. For example, its “AL” series of disks are designed for use in Tier 1 enterprise servers. These disks use a SAS interface and have capacities of up 2.4TB with a MTTF of 2 million hours.  Toshiba’s “MG” series caters for enterprise storage arrays. The MG07 and MG08 can hold up to 14TB and 16TB of data respectively. These whopping storage capacities are achieved with the assistance of helium, which is injected into the main chamber of the drive. This is then laser-sealed. Helium enables smoother writes that are closer to the platters and reduces power consumption. Moreover, these disks contain 9 platters instead of the competition’s 8. (We’re glad to see that Toshiba is not skimping on platters. As a data recovery company, we know what can happen when manufacturers try to economise on them… Seagate’s calamitous “DM” series of 3.5” disks being a prime example). This series of disks also use MAMR (Microwave Assisted Magnetic Recording) whereby a Spin Torque Oscillator of frequencies between 300GHz and 300MHz saturates the bit areas of the platter with a concentrated microwave field, which enables more reliable writes in high-density disks.

Scaling up this technology means that we might be seeing 28TB or higher capacity HDDs in the not too distant future. It will be interesting to see what approach Seagate will adopt with its disk-heads as its HAMR technology has come in for sustained criticism for stressing disk platters (not to mention the users…) For non-data centre disks, Toshiba also makes disks for the SME and personal market. Its N300 disks, designed for NAS, come in sizes of 4-14TB, designed for 24/7 usage. Toshiba also makes standard mechanical disks, such as the P300 (3.5” S-ATA) and L200 (2.5” S-ATA).   

CCTV Nation

Maybe it’s all the crime thrillers that people are watching on Netflix or the Dublin gangland documentaries being shown on Virgin Media One, but there’s been an explosive growth in home surveillance systems in Ireland recently. Similar trends are occurring worldwide and hard disk manufacturers are responding to this demand. WD already has its “Purple” disks, Seagate its “Skyhawk” line-up and Toshiba its “S300” surveillance hard disks. This disk (picture above) comes in capacities of 5TB to 10TB and is designed for 24/7 operation. It’s a “write-centric” disk, meaning that its disk-heads and firmware are optimised for 90% writing and 10% reading.

The early days of facial recognition technology as presciently portrayed in James Bond film The Living Daylights (1987)

According to the NAND and SSD manufacturer Micron, this growth can be partially explained by the precipitous drop in prices for 2K and 4K image sensors (a key component of camera manufacture). But growth in surveillance is also being boosted by the next-generation SOC (system on chip) security systems, which use deep learning and AI (Artificial Intelligence). Where once security systems or facial recognition technologies would just capture and store, now they can capture, store and analyse. This was presciently portrayed in the James Bond movie The Living Daylights (1987), where the baddie Max Zorin used facial recognition technology in his office to identify James Bond in a matter of seconds. Surveillance systems now need to perform analysis in real-time without the latency incurred by communicating back to a centralised cloud-based server. Imagine an AI-powered surveillance system in an airport that detects a passenger at the boarding gates who is on a “no-fly” list. Even with a relatively fast link to “the cloud”, image retrieval and analysis might still prove too slow. If that same surveillance system used edge-based SSD storage, the storing, analysis and processing of images of the system would be vastly accelerated.

In use cases such as these, NAND is the big enabler. A body or dash camera using a 2.5” spinning disk would probably not last too long in the field. While NAND has been on the market for a relatively long time now and its evolution to layered versions or “3D” means we now have higher capacity reliable storage in a very small form factor. Micron was exhibiting its “C200” microSD card which was released at the Mobile World Congress in Barcelona just a few days previously. This Lilliputian card uses 96-layer 1TB QLC 3D NAND with eight 128GB dies. It has write-speeds of 100MBps and read-speeds of 95MBps. If Micron can scale its NAND to 256-layers, I’ve no doubt that we’ll be seeing 2TB and 4TB versions of this card shortly.

Now you might be thinking, does the average consumer really need 1TB of storage in their camera or phone? Well, a substantial number of consumers now expect to be able to shoot footage on their phones or action cams in 4K HDR quality. (To give this question some perspective, only twenty years ago phone manufacturers were asking themselves, do consumers really need cameras on their phones at all?)

While a card like the “C200” might be fine for a consumer-level smartphone or action cam, it might not be the ideal solution for other use cases. For instance, the primary storage in edge-based surveillance systems is often in the camera itself. (Having the storage here eliminates the network congestion that is generated by IP-based cameras and frame loss due to network disruption). The storage medium in such a camera means it is going to be exposed to constant writes. This is something that a QLC-based NAND card would not be able to do! For this, reason Micron has brought out industrial-quality TLC-based SD cards using 3D NAND (such as the MTSD256AHC6MS-1WT). Its high-capacity models can store footage for up to 30 days and come equipped with a card-lock to prevent tampering. Micron also offers a health management API to proactively warn system administrators of potential SD card failure.

The future of computing is edgy…

It’s not only in surveillance that edge-based storage is playing out. IDC Research estimates that in the next 3 years, 45% of IoT generated data will be stored, processed and analysed at the edge of the network. And this is something that NAND and SSD manufacturers are extremely interested in. Edge Computing offers faster response times, more reliable operations in areas of poor internet connectivity and better data security. Most Android smartphone users that use Google Maps’ “offline maps” feature know the benefits of having local storage. It’s often significantly quicker than the device having to communicate with the cloud. It is being touted that autonomous cars are basically going to be “servers on wheels”. It is inevitable that these cars will traverse areas where internet connectivity is poor. Here SSDs and NAND will play a pivotal role in not only mapping, but also enabling the execution of the car’s key software functions.

The pervasiveness of high-speed high-capacity is going to make our lives easier. Ever tried to buy a train ticket from a self-service kiosk on a busy rail network at peak time? You have probably noticed that the loading of the menus and timetable information is laboriously slow. It’s more than likely that the ticketing machine, along with hundreds of others, was simultaneously communicating with a central server and the network was congested. Taking an “edge computing” approach to this problem, key information, such as timetable information, is stored locally on the ticket machine (just like Google “offline maps”) while data, such as real-time updates and seat availability, are transmitted in the form of compact, computed findings rather than raw information. Or let’s take the example of a wind farm off the west coast of Ireland. While it’s probably still within connectivity reach of 3G or 4G networks, constant communication might be more problematic. Storage on the “edge” can mean there is no data loss or operational failure in the event of limited connectivity. This is not to say that the Cloud is going to become redundant, but it will take a more passive role in our lives – partly enabled by advances made in NAND memory technology. Thank you, Mr Masuoka!

Drive Rescue Data Recovery is based in Dublin, Ireland. We offer a complete data recovery service for SSDs such as those from Toshiba, Samsung, Micron (such as 1100 M.2, M500 and M550) and SanDisk. We also recovery from Toshiba portable hard disks such as the Toshiba Canvio (DTB320, DTH 305, DTH310 and DTH320) and recover from disks such as inaccesible WD My Passport Ultra portable disks with blinking lights. Find out more at: www.datarecoverydublin.ie

Data recovery from Maxtor M3 2TB Portable Disk with Flashing Blue Light

Maxtor M3 2TB External Hard Disk

We were recently helping a customer solve an issue with an inaccessible Maxtor M3 (Model HX-M201TCB/GMR) disk which was showing a flashing blue light when connected to a PC. The disk made a healthy spinning noise but was not appearing in Windows explorer. Much to the dismay of the user, a university lecturer, over 3 years worth of PowerPoint presentations were not appearing.

Inside the Maxtor enclosure, we found a Seagate disk which was no surprise as the Maxtor brand is owned by Seagate. The first problem we discovered with the disk was an overflowing G-List. This an area of the firmware designated for recording bad sectors. Using specialised data recovery equipment which can manipulate the disk at firmware level, we cleared this list. Next problem was the 19,872 bad sectors. We programmed our recovery system to read the disk allowing for a read-delays of up to 900 milliseconds. We also programmed our system to read the disk using a block size of just 60 sectors per read. This would allow us to maximise the chances of the best possible recovery for the client.

Now with an image of disk, we programmed our system to image the disk in reverse mode. This covers areas which the forward disk-read passes would have ignored. On completion, the bad sector count had been whittled down to just 944.

17GB of PowerPoint lectures (.PPTX files) were recovered and reunited with the delighted user.  

Need to recover files from a Maxtor M3 external hard disk in Ireland? Drive Rescue have been recovering data since 2007 and can help you. Visit www.datarecoverydublin.ie for more information. Or call us on 1890 571 571.