RAID 0 to Smaller RAID 0 (As a Temporary Fix)

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I'm considering a multi-disk storage solution based around maximizing performance. Of all the options I have considered, there is one that I wanted to get some answers on before I commit to anything:

If I have a drive failure in a four-drive RAID 0 configuration, can I rebuild the array with the three good disks (again, RAID 0) and then restore from an ATI backup file to the new array without any problems?

Some assumptions:

  • Using Windows
  • Using "Fake RAID" (so not dynamic disks, but not a dedicated hardware solution ... onboard RAID controller only)

Mind you, this is as a temporary solution and would only last as long as it took me to get the defective drive replaced. I'm assuming ATI could accomplish this, but are there any tweaks that would be necessary? Would I have to have the Plus Pack installed to accomplish this?

Then of course, I'm assuming that if it was possible to go from a larger RAID to a smaller one, it would be a similar process to re-expand the RAID once the defective disk is replaced?

Mon, 07/25/2011 - 23:13
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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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mvp

When the RAID 0 is set up and supported by ATI, it shouldn't matter to ATI how many disks are powering the RAID. I say shouldn't, because I have never tested your particular case.
Restoring from a big volume in RAID to a smaller one is possible if the data volume fits the smaller one, of course.

What is important is that the LInux version of ATI that runs on the Acronis Recovery CD sees your RAID correctly. If it does, there is a high chance the restore is going to work.

About expanding the RAID: my take is that you will have to break the RAID and restore again.

With 4 disks, you could go to a RAID 10, with a small performance hit compared with RAID 0, but more resiliency and easiness to swap disks.

Tue, 07/26/2011 - 01:21
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