On Thu, Jul 24, 2014 at 12:36:47PM +1000, hannah commodore wrote:
On 24 Jul 2014, at 10:00, Craig Sanders <cas@taz.net.au> wrote:
On Thu, Jul 24, 2014 at 09:45:45AM +1000, hannah commodore wrote:
I've inherited a system which has an Adaptec 2420SA RAID controller and 4x SSDs running in RAID6.
given that thet 2420SA doesn't do RAID6 natively, i guess you must be using mdadm linux software raid...
It does support RAID6, as well as 5EE, 10,50, 60 etc
oops, you're right. i was confusing it with the 1430SA (which I have), a 4-port PCI-e SATA card that only supports RAID levels 0, 1, & 10, whereas the 2420SA is a PCI-X RAID card.
if the motherboard has four spare SATA ports, have you tried plugging the SSDs directly into the m/b? i.e. i suspect that the problem is more likely with the adaptec card than with either the SSDs or the software raid.
I've tested this disks individually when they were kicked out of the array, and always seem fine. I've only seen 1 actually failed disk in almost a year of this array running.
it really does sound like it's the adaptec card that's the problem. ok, the adapatec raid6 is proprietary so you won't be able to just plug the SSDs into motherboard ports...but you mentioned you had spares for each of the SSDs. you could plug them into m/b SATA ports, configure them as raid6 (or raid10 or btrfs or whatever) and rsync from the adaptec raid array to the new array. if the adaptec raid is the boot drive, you'll also need to re-configure/re-run grub. craig -- craig sanders <cas@taz.net.au>