Posted September 30, If the array can be moved between systems “use disk config or use controller config” type prompt or can accept non-identical drives in the array, there is likely some abstraction happening. That can be done on both HP and Dell controllers without issue and I’m sure on plenty of other controllers as well. Server Fault is a site dedicated to professionals; novice questions are off-topic. This question appears to be off-topic.

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Jeremy 2 6 You’d likely need a controller which uses the same format which in practical terms means an identical card if the existing one failed. You can replace the controller with an identical model and it will see the old raid configuration and take off where the failed controller left off.


Skipping that, and writing a simple program to read from each drive in the correct order including RAID 5’s rotated parity I managed to recover all the data. If you’re using RAID-1, then the controller is usually not relevant. If i turn off lsi raid in bios it works, i can see my 4 hdd. It gives error at stage when it should show hdd. softwaer

Posted March 1, I hope it should work as these raid controllers are supported in XenServer v4. Guest Enthusiast 14 Members 6, posts. One particularly annoying fact is that you can no longer take a single drive with data on it and make it into a RAID1 volume – unless the drive was created as a RAID member, it must be wiped. Software RAID is horrible for a number of reasons and people who think that they are somehow more reliable than hardware, simply do not know how enough about hardware controllers.

You could test for that by setting up the initial array and then pulling one of the drives and connecting it to a regular disk controller. If it stores all the config in the controller and does no format abstraction, it may be able to be bypassed. So if you have a failed controller and can’t replace it with the equivelant you’ll probably be SOL.

The notion that if one hardware controller fails, you may need to wipe the drives is inaccurate, but I think I know what they may have been referring to. Likewise, you can no longer take a RAID 0 array and make it fault tolerant – you got to back it up, wipe everything, build the array and then restore.

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If the array can be sat/asas between systems “use disk config or use controller config” type prompt or can accept non-identical drives in the array, there is likely some abstraction happening. This will allow you to back up the data to another place, then wipe your disks, build a new array and put your data back. Upvote if you found this answer helpful or interesting. Home Questions Tags Users Unanswered.

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Someone told me that if the controller fails, you can’t just get a new controller because you’ll have to reformat the drives. We are working on a fix. You may have trouble booting from this drive because it will be missing drivers and boot paths for your new controller, but that can be addressed manually.

Posted September 30, Essrt-2 work in a large laboratory with hundreds and hundreds of Linux boxes of all sizes. It will normally also work on different models within the same range, and often across generations from the same manufacturer.

Troubleshooting RAID Issues for IntelĀ® Server Boards and IntelĀ® Server Systems

A lot of your rant is somewhat controller specific – especially the one about transforming single disks into RAID 1.

Unfortunately, Inteo has taken a technological step backwards in the last fsrt-2. The problem happens when you cannot get your hands on an identical controller. Or you could just decide that on controller failure you’d fall back to the most recent backup. Posted February 22, Michael Graff 6, 1 16 Posted September 21, Troubles of migration or crash recovery are much higher than performance gained.