Moving a PV onto raid
russell at coker.com.au
Thu Apr 5 15:55:47 EST 2012
On Thu, 5 Apr 2012, Toby Corkindale <toby.corkindale at strategicdata.com.au>
> On 05/04/12 13:46, Brett Pemberton wrote:
> > A home system has N number of 1.5TB drives, running in RAID5.
> > At one point, these drives stopped becoming available, so the last time
> > I extended the array, I used a 2TB drive.
> > Now that a 1.5TB drive has failed, I'm replacing it with another 2TB
> > drive, and wondering the best way to use the remainder 500GB
> > Is there a better plan?
> If two disks have failed and aren't available commercially any more, I'd
> say it's likely the rest will go sooner rather than later because
> they're all getting too old.
I've got a bunch of servers with RAID-1 arrays as small as 20G. There's one
server that I'd really like to reinstall but it has been running on a pair of
20G disks since 2006 without a break.
That said, I wouldn't be using RAID-5 for large storage that's important.
Even RAID-1 has issues. It's best to use something like BTRFS or ZFS for
On Thu, 5 Apr 2012, Chris Samuel <chris at csamuel.org> wrote:
> I don't believe you can do this with btrfs, if you define a RAID1 array
> (for instance) with different size drives you will get ENOSPC when you
> fill the smaller one as it can no longer distribute to both.
Surely if you tell it to use RAID-1 and give it more than 2 disks then it can
somehow work things out?
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