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About shuckey

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  1. shuckey

    RAID Failure - Best Practice

    The data that got corrupted was a folder that our IT person at the time was not backing up. So he had to run some data recovery software on an old back up to at least get some of the data back. That was the main reason for data corruption. So are you endorsing RAID 6? Rebuild as most expect? The data recovery companies' explanation included, that when there is an issue, the RAID controller automatically goes into "Degraded" state. The data recovery folks stated this to me before I checked the firmware of the RAID controller and there it stated "Degraded." Then when the controller rebuilds the RAID after a new drive replacement, it is rebuilding the array as Degraded. I believe they said something about the RAID 5 parity information was rebuilt on to different sectors than the failed HD. Once again, I haven't heard this before but there seems to be something to it. I will add that the four disc hardware RAID 5 was internal on the Dell Server. I don't know if that makes it something different than a hardware rack NAS/SAN or not. Thanks!
  2. Hi all, I'm new here and not completely sure if I put this in the correct location or not. I have a question about RAID failures and best practices after a HD in RAID fails. My question arose with a four disc RAID 5 set up in a Dell Server. A drive failed and a new drive replaced it. We had data corruption for various reasons. I have then been in discussions with a few data recovery companies. The folks at the data recovery companies told me that the worst thing to do when a drive fails in a RAID set up is to replace the drive. They say to shut down the hardware and send everything to them right away. The manufactures and distributors advertise that you should not worry when a drive fails (like in a RAID 5, RAID 6, or RAID 10). All you have to do is pop in a new drive, let it rebuild, and you are ready to go. The data recovery companies have a financial interest in what they say. The manufactures and distributors also have a financial interest in what they say. Who should I believe? Should I just replace a failed HD as the manufactures and distributors advertise? Should I immediately shut down the hardware and send everything to the data recovery companies? Are there different RAID set ups that dictate which path to take? Never underestimate the importance of a good back up procedure which should include a checksum process of somesort. This is what helps us out and another friend of mine. Thanks so much! Shawn