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April 23rd, 2012 11:00
CX 300 add disk to RAID5
Hello.
I have a RAID group with only one LUN (RAID5). I would like to add a new disk (same size as the existing ones) to the RAID.
The only way I found to do this is create a metaLUN and concatenate/stripe the old LUN with the new one.
I have a couple of questions:
- If I stripe both LUN. Is the new one (only with a disk) inside the RAID5? I mean, if this disk fails, can I revover the data?. Would it be the same if I concatenate LUNs?
- Is there a best way to do it?
Thanks in advance
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Dev Mgr
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April 23rd, 2012 11:00
Go to the properties of the raid group. On the disks tab you can add the unused disk. This will take some time, but once finished restriping, you can then you can create a new LUN with the available space in the raid group. Once created you can use a concatenated MetaLUN to expand the existing lun with the space from the new LUN.
If you set that single disk up as a single disk raid 0, and then concatenate, if you lose that 1 drive, you lose all your data. This is why it's better to expand the raid group with that disk and then use the MetaLUN feature to expand the existing LUN (but don't use striping) within a single raid group (this is only for 2 different equally created raid groups)).