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тАО02-06-2003 11:52 AM
тАО02-06-2003 11:52 AM
Raid backups
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тАО02-07-2003 01:40 AM
тАО02-07-2003 01:40 AM
Re: Raid backups
In theory that would work. To work, though, these steps must be obeyed:
1. Disk array is not in use (no writing is occurring).
2. Cache is disabled and flushed.
I understand that you want to backup your array using this method. It is not recommended, because:
1. You must have a large downtime to perform it (disk array should be unavailable for 3 rebuilds)
2. During rebuild, your data is unsafe, so if a disk fails during rebuild, you lose all data in LUN.
3. It is slow and clumsy.
The best way to backup your data is to use a good old tape drive. It is faster, and much safer this way.
HTH,
Vince
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тАО02-07-2003 04:03 AM
тАО02-07-2003 04:03 AM
Re: Raid backups
I have experienced that the drives removed will be recognized as a viable drive if the are replace in the same order, same locations, a group for the array in the same order.
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тАО02-10-2003 09:11 AM
тАО02-10-2003 09:11 AM
Re: Raid backups
why do you want to do this?
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тАО02-10-2003 07:39 PM
тАО02-10-2003 07:39 PM
Re: Raid backups
A traditional (not virtualized) array might work, but do not write any data to the array during this process.
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тАО02-11-2003 06:31 AM
тАО02-11-2003 06:31 AM
Re: Raid backups
we are moving servers from one building to another. The data that resides is business critical. The app that runs creates thousands of 1kb tag files making it nearly impossible to backup with tape. So we were looking at backup/contingency plans for this move and that was one of the items brought up for investigation and as I have never done something like that with a RAID 5 array. I was wondering if it was possible. I mainly was unsure that when you rebuild an array does it use the same parity scheme each time or does it create a new one based on performance/usage data supplied by controller.
Thanks,
Jim
PS and of course we will stop all shares and manipulation of data while this rebuild process takes place.