On Thu, 5 Apr 2012, Toby Corkindale <toby.corkindale@strategicdata.com.au> wrote:
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. http://etbe.coker.com.au/2008/10/14/some-raid-issues/ http://etbe.coker.com.au/2012/02/06/reliability-raid/ 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 reliability. On Thu, 5 Apr 2012, Chris Samuel <chris@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? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/