Is It Possible to Recover Deleted Files from a TRIM-enabled Solid State Drive?

Solid state drive (SSD) can improve your computer performance with TRIM feature. But this function will also greatly reduce the chances for data recovery. So this post will delve into this issue.

Recover Deleted Files from a TRIM-enabled Solid State DriveCompared with the traditional hard disk drive, solid state drive indeed has many advantages. For instance, the solid state drive has no moving parts inside, so SSDs are immune from mechanical issues, like drive head damage. Moreover, the solid state drive works via Flash memory technology, so SSDs can make users’ PCs to run much faster. Moreover, with it developing, SSDs are increasingly cheaper than before. Thus, SSDs have gained extensive popularity today.

However, it does not mean that solid state drive is not flawless. It still can fail. At that time, internal data will suffer as well. Hence, you still should make regular data backups, which will help a lot in future data recovery. For instance, if a solid state drive gets damaged and your PST files gets corrupt, to retrieve the corrupt PST data via the backups will be quite simple. If you have no backups, to recover data from a solid state drive will be much more complex than a hard disk drive in that the current generation of SSDs come endowed with TRIM feature, which is helpful to some extent but also brings out some troubles regarding data recovery. Here we will probe into this issue in detail.

Brief Introduction of TRIM Feature on SSDs

As for TRIM feature, in short, when you delete any data from a TRIM-enabled SSD, the drive will clear all the sectors immediately and permanently. TRIM is a new feature for new versions of SSDs, which can speed up data writing via clearing the flash memory cell as soon as you delete any data. TRIM will let the PC operating system to inform the drive about the free data sector when they become available after deletion. In other words, the block where the deleted data was will get erased within the moment of data deletion.

Difficult to Recover Deleted Files on TRIM-enabled SSDs

Actually, the older generation of SSDs doesn’t have TRIM feature. So, recovering data after data deletion on that type of SSDs is quite easy in that the deleted files only get removed from their index entry. Actually the original files are still intact. Unlike the older versions of SSDs, the new generations of SSDs commonly comes with TRIM feature enabled. Thus when you delete any data, the data will be removed at once for forever. There is no doubt that the chances for data recovery on TRIM-enabled SSDs are pretty small.

Exceptional Cases of Easy File Recovery on SSDs

Of course, there are still some exceptional cases in which you still can recover the deleted data on a SSD. It is usually because that either the SSD or the operating system configuration does not support TRIM command. The followings are some instances of the exceptions.

  1. You’re using an older generation of SSD which doesn’t support TRIM.
  2. You’re using SSDs in a RAID array in that array cannot support TRIM.
  3. You’re using a SSD which you’ve formatted with FAT32 file system.
  4. You’re using an external SSD via connecting it to your computer with USB or firewire port.
  5. You’re running your SSD on older version of Windows (before Vista) or older version of Mac OS (before 10.6.8), which is unable to support TRIM.
  6. You’re using a SSD whose file system is compromised and its volumes have been inaccessible.
  7. You’re using an encrypted SSD as TRIM cannot run on encrypted volumes.

Author Introduction:

Shirley Zhang is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including sql repair and outlook repair software products. For more information visit www.datanumen.com

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