05-07-2014 03:52 PM
I have an IdeaPad Y570 (Windows 7) that does not boot due to corrupted files (cause unknown) and I am seeking a method of recovering a few files that I had neglected to back up.
The laptop has a Hitachi 750Gb HDD and a Toshiba 64GB SSD. I had thought that the SSD was simply a boot drive but it seems that Express Cache was installed and the SSD is a cache for the HDD. From Windows Explorer, it appeared that I had a drive named "data mcdatagins" and another named "ssd". I thought these corresponded to different physical drives, but not so.
Attempts to recover files using a bootable CD (e.g. R-Studio) have failed, although some unwanted files are recoverable. The partition configuration is as follows.
Hitachi hard drive 698.64 GB
1. unnamed 654.58 GB primary - file system not detected
2. ssd 29.30 GB logical - all user files visible
3. LENOVO_PART 14.75 GB primary - root, files visible (e.g. One Key directory)
Toshiba mSata SSD 59.63 GB
1. unnamed 200 MB primary - root,files visible
2. data mcdatagins 714.01 GB primary - few user files visible
If additional boot partitions should be there, they are not.
The files I want are on Toshiba partition 2. However this partition appears to be a cache for Hitachi partition 1. which looks to recovery software like unstructured bits. I assume that this is either because Hitachi 1 is truly scrambled or only Express Cache software can make sense of it.
Any suggestions on how to proceed? Would it be possible to make a bootable Windows 7 USB drive with Express Cache that could then read "data mcdatagins"?
05-08-2014 06:45 PM
So the answer appears to be YES. My current understanding of Express Cache is that the HDD partition has an NTFS file system and the corresponding SSD partition/cache has a structure that is understood by Express Cache. So...
I attached a 1TB WD Elements USB3 drive to my Y570 and booted (via CD) Data Rescue PC3 by ProSoft. I directed the recovery software to scan the Hitachi drive. After about 3 hours, it reported that it had found over 300Gb of files that are recoverable. These are not in a directory structure, rather, they are organized by file type, such as .jpeg or .psd, and have names like 1003467.psd. With a few clicks, I told it to copy all of this stuff to the USB3 drive. Then I can open the files of the type I need and see if I am lucky.