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...]

Determining configuration for RAID Five or RAID Zero

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Reading the title makes it sound like something that should be easy. I should be able to just pull out the drives in the order they are presented in the hardware, mark them as 0 through whatever and be done with it. However it has been my experience … [Read more...]

Stale Drive Detection for Windows NTFS Raids

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Greetings and Salutations! My name is Richard Correa and I am a Software Engineer and data recovery specialist for DTI Data. Over the years I have written many tools to help the technician resolve several of the problems they may encounter during … [Read more...]

Recovering from a RAID Controller Failure

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There are many reasons why a RAID goes down.  A technician will normally assume that one or more of the drives have failed.  This is a common diagnosis as the diagnostic lights on each of the drives may be blinking, the lights may have gone amber, or … [Read more...]

Network Attached Storage NAS and Other Nightmares

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Network Attached Storage (NAS) devices have been a boon for storage technology.  What a great windfall for the industry.  Grab yourself an Open Source operating system, stick it on a prom, get yourself an inexpensive motherboard, some hard drives and … [Read more...]

End User Raid Zero Array Crash

I had a client call me the other day and tell me that her two year old two terabyte drive had crashed and all of her pictures of her children, as well as her wedding were on the drive. She did not have a backup and was very upset. I knew that there … [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...]

RAID Configuration and Parity Check

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The function set for the inaugural offering of RAID Diagnostic Toolkit is very basic. This post will explain how to choose a set of 'streams' to build a 'RAID set'. Initially the software does not have any options for stripe size, raid type, meta … [Read more...]