topic Change RAID 0 to RAID 1 in Netservers

Change RAID 0 to RAID 1

Leif_9 — Tue, 19 Jul 2005 06:29:31 GMT

I am running an LXr 8000 with two identical 9GB hard disks in RAID 0 configuration with NetRAID-3Si.

How do I change it from RAID 0 to RAID 1?

Thanks

Re: Change RAID 0 to RAID 1

Bryan Eley — Tue, 19 Jul 2005 10:40:24 GMT

If you are not concerned about preserving data and want to do a fresh install, you should be able to use a netserver cd to boot up and use the netraid tools to select the existing raid 0 group, delete and then build a mirror set. I think you can also use the netraid utility via CTRL-M at bootup to rebuild the raid type you want, but the previous suggestion might be more user-friendly.

If you want to break the raid, build a raid 1 and yet keep the previous drive contents I'm not sure offhand how easily that can be done. Typically when you break an raid 0 stripe data is more or less permanently lost from both drives by the act of destroying the stripe. Perhaps some more knowledgeable gurus might have a better suggestion for the latter scenario.

Re: Change RAID 0 to RAID 1

kris rombauts — Tue, 19 Jul 2005 23:36:37 GMT

Leif,

Bryan is correct, if you want to migrate and keep the data,their is no way you can ever go from a 2 disk raid-0 to a 2 disk raid-1 logical drive, this is because the data is spread over the 2 disks in raid-0 and in raid-1 it is only stored on one disk (and identically copied onto the second disk).

Your raid-0 to raid-1 migration would work perfectly if you only have a one disk raid-0 logical drive, then you can very easely migrate to raid-1 as it only takes the controller logic to copy the original disk onto the second disk.

Another way to accomplish what you want is if you have more disk slots available (not the case in LXr8000 if using internal disks only) and then you can migrate from a 2 disk raid-0 to a 4 disk raid-0/1 (raid 0/1 is disk mirroring but also striped over x-number of disks) by adding 2 disk.

HTH

Kris