Comments on: RAID 5 Stale drive detection http://www.dtidata.com/resourcecenter/2009/12/02/raid-5-stale-drive-detection/ Hard drive recovery data recovery resource center with how to guides for windows RAID Snap server file system repair NTFS partition recovery tools tips and tricks to recover data Fri, 16 Jul 2010 01:02:54 -0400 hourly 1 http://wordpress.org/?v=3.0 By: John Trame http://www.dtidata.com/resourcecenter/2009/12/02/raid-5-stale-drive-detection/#comment-7831 John Trame Wed, 07 Jul 2010 02:03:39 +0000 http://www.dtidata.com/resourcecenter/?p=1192#comment-7831 If a single drive fails in a raid 5 array, and that drive is not replaced for a while, I believe any new data written to the array will be written without parity. When the faulty drive is replaced, will the rebuild be able to calculate parity for the data that was written without parity? If the rebuild does calculate and record parity for the newly written data, how does it do it? Does it use information from the MFT to determine which data was written, while the array was degraded? If a single drive fails in a raid 5 array, and that drive is not replaced for a while, I believe any new data written to the array will be written without parity. When the faulty drive is replaced, will the rebuild be able to calculate parity for the data that was written without parity? If the rebuild does calculate and record parity for the newly written data, how does it do it? Does it use information from the MFT to determine which data was written, while the array was degraded?

]]> By: David http://www.dtidata.com/resourcecenter/2009/12/02/raid-5-stale-drive-detection/#comment-7696 David Fri, 19 Mar 2010 13:13:46 +0000 http://www.dtidata.com/resourcecenter/?p=1192#comment-7696 Interesting write-up. I'm a technician and occasionally have to destroy individual failed drives from RAID5 arrays. Could you confirm whether it would ever be possible for anyone to recover any meaningful data from a single drive out of a RAID5, without the rest of the array? I'm interested in this from the perspective of determining what is the appropriate destruction method for the drive - no point in going to the expense of getting it granulated if there is no recoverable data on there anyway. Interesting write-up. I’m a technician and occasionally have to destroy individual failed drives from RAID5 arrays.

Could you confirm whether it would ever be possible for anyone to recover any meaningful data from a single drive out of a RAID5, without the rest of the array? I’m interested in this from the perspective of determining what is the appropriate destruction method for the drive – no point in going to the expense of getting it granulated if there is no recoverable data on there anyway.

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