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тАО03-31-2006 12:14 AM
тАО03-31-2006 12:14 AM
We have one default disk group, and have a mix of vraid5 and vraid1 vdisks. These are mirrored to our other EVA via Continuous Access.
Has anyone else been faced with this scenario? I would be interested to hear others opinions and experiences.
Solved! Go to Solution.
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тАО03-31-2006 12:29 AM
тАО03-31-2006 12:29 AM
Re: Changing disks on EVA 3000
Anyway, what you want to do can be done, but you should be carefull. If your disk group does not have enough disk space, as you said, there may be a problem.
If you remove a 72 GB disk and add a 146 GB disk, and your protection is single (or double) the disk group will substract the space of 146x2 for protection (or 146x4 if double), so this could be a problem, because replacing a single disk will cause that your available space will decrease instead of increase. If you replace two disks at the same time, this problem can be avoided, but your disk group must have enough disk space to acomodate the removing to two disks at the same time. After this, you can replace disk one by one.
Another thing to consider is that ungoupping a disk can take a log time (one day), so, with a fully populated EVA, it can take one month to replace all disks.
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тАО03-31-2006 12:50 AM
тАО03-31-2006 12:50 AM
Re: Changing disks on EVA 3000
In fact: the EVA will always attempt to take blocks from the "spare space" (=free blocks for virtual disks and rebuild) instead of the "protection space" (blocks reserved for rebuild).
But Ivan is right: it can take a very long time to replace the disks and some internal data structures might get messed up which can cause paired disks (used to store mirror copies) end up in the same disk drive enclosure.
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тАО03-31-2006 01:14 AM
тАО03-31-2006 01:14 AM
Re: Changing disks on EVA 3000
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тАО03-31-2006 01:18 AM
тАО03-31-2006 01:18 AM
Re: Changing disks on EVA 3000
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тАО03-31-2006 01:20 AM
тАО03-31-2006 01:20 AM
SolutionDisk failure protection: Requested Level.
You can disable this protection setting to none, but this will increase the probability of a data loss in case of disk failure, yet more if you will be removing disks from the storage.
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тАО04-06-2006 01:49 AM
тАО04-06-2006 01:49 AM