RAID 5 Sybase Data File Diagnostic Software

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Recently I received a set of drives that were originally in a RAID 5 (stripe set) configuration. These drives were old Seagate forty gigabyte Parallel ATA (PATA) drives. The client explained that they had rebooted the server and when it came up again … [Read more...]

RAID 1 Data Recovery FREEWARE Full Version RAID Software

DTI Data Recovery is happy to announce a new full version FREEWARE data recovery software for RAID 1 users. If you are using a RAID 1 which is a mirrored set of hard drives, and the RAID no longer boots, than we can help. More home users are getting … [Read more...]

Recovering a Spanned RAID Set Without RAID Software

  Recently it was my displeasure to work on a three drive spanned set for NT 4.0.  The set was soft configured so when the boot drive went down, with all of the configuration data for the RAID on it, the RAID would not mount.  In addition to that, … [Read more...]

Use Bad Block Frequency to Determine a RAID 5 Stale Drive

We have been discussing the love affair I have with stale drives in a RAID five array and how best to determine if in fact one exists. I explained how the NTFS file system data is normally laid out and the fact that the old and new data, as well as … [Read more...]

Determining a Stale Hard Drive in Most RAIDs

  In my last installment I covered two of the three reasons why we do a parity check.  First we want to make sure that we do not have a stale hard drive in the array.  Although I did not cover how one determines if in fact a stale hard drive exists, … [Read more...]

Check Your RAID Consistency Before A Rebuild

Over the years one of the most consistent problems with RAID recovery is the rebuild. I would estimate that nearly 40 percent of the RAIDs that we cannot recover are due exclusively to the fact that a technician executed a rebuild before verifying … [Read more...]

RAID Five Steps to recovering your data

     In one of my articles I tried to define the mathematics of a RAID 5 stripe and how it relates to data recovery.  Using the eXclusive ORing truth table we can continue to run the array even when one drive has dropped out of the array.  This RAID … [Read more...]