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Application Failed on WD SES Encrypted drive

The error message of such type can occur when a hardware-encrypted external WD hard drive, like My Book Essential or My Book for Mac series, has failed to start specially designed software that provides assess to the partition with user's data on the drive.

Application Failed.
Cannot read from sector 0 of WD My Book 111A.
This media is write protected.

The affected WD SES software corruption is basically happened due to the internal physical damage of the device, and cannot be fixed by simple re-writing the damaged code. Yet, if you don't care about losing files that were previously written on the drive, you may try fixing the problem by re-formatting the drive, using Apple Disk utility software that comes with the device.
As a result of the drive failure, the application responsible for launching the virtual partition with programs, controlling the access to the main large partition of the external storage with user data is failed and you see such error. This problem can be solved in the data recovery lab by safely extracting files from damaged drive and back it up to the new external drive.
Mostly-affected models by this issue are listed below and have PCB 4060-705059-001 REV. P1 :

  1. My Book Essential Desktop with model numbers WDBACW0030HBK, WDBACW0020HBK, WDBACW0015HBK, and WDBACW0010HBK
  2. My Book for Mac with model numbers WDBAAG0030HCH, WDBAAG0020HCH, WDBAAG0010HCH, and WDBAAG6400ECH.
LBA distribution on 3.0TB WD30EZRX drive

Where are WD SES files located on the drive?

For better explanation where SES files are located on the drive, let have a close look at the example with 3 Tb drive comes in My Book external enclosure, the model WD30EZRX from the Caviar Green line. Comparing the amount of LBA=5,860,466,688 sectors visible on the drive inside external My Book Essential with LBA=5,860,533,168 total in direct connection through serial ATA port (must supporting large new drives with capacities greater than 2.19Tb) you can see the difference equal to 66,487. Well, technically you may see LBA=732,558,336 sectors instead of 5,860,466,688, but it is only because that 3 Tb partition has a 4096 bytes in sector format. And that is eight times bigger than traditional 512-byte sector. So, there is no discrepancy, because 732,558,336 * 8 = 5,860,466,688. Returning to those invisible in My Book sectors, they are reserved for using SES files for launching a virtual drive serving and controlling access to the encrypted volume. To gain control over the encrypted partition you have to restore those sectors or be a specialist in such specific data recovery tasks to override the partition control protected by WD SES drivers. If you failed in accessing data on the drive, please contact us - we can help.

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