[linux-lvm] raid10 to raid what? - convert
peljasz at yahoo.co.uk
Tue Oct 17 09:03:58 UTC 2017
On 16/10/17 22:16, John Stoffel wrote:
> lejeczek> I'm sroogling and reading but before spend whole day doing
> lejeczek> that, I was hoping you guys, gals, done conversion from
> lejeczek> raid10?
> Please post your configuration and explain what you're trying to do in
> more detail.
> lejeczek> I'm thinking best(natural?) would be to convert to two raid0
> lejeczek> LVs, right. Am I right? Would it be optimal, and how do you
> lejeczek> do it?
> You don't put LVs directly ontop of RAID0, you put them in VGs, which
> reside in PVs, which reside on disks or RAIDs, or iSCSI LUNs, etc.
> It sounds like you have two filesystems, each in their own LV. You
> want to move them off a RAID10 (four disks, in two mirrored PAIRS,
> stripped across them is what I assume), because why?
> Give more details. You do realize that while you will gain space, you
> will lose reliability with RAID0, if one disk fails, all your data is
no other raids but LVM's own.
not much in configuration, unless I misunderstand, question
I'm posing is simple - is it possible to convert/split lvm
raid10 LV into two raid0 LVs? (here one thing comes to mind:
data stays intact?) Or raid10 LV to any other raid?
As I sroogled I saw there is "mirror spitting" but term
raid10 does not appear in that context, or I failed to find it.
But man pages also mention, with regards to raid takeover:
· between striped/raid0 and raid10.
So it sounds like possible(so no other raid levels but these
two), only might be intricate process/procedure, which is
not documented, or again, I failed to find it.
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
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