Hi Alexander,
I’d suggest doing so.
Don’t forget to issue a „disk zero spares“ afterwards
br
Josef
Mit freundlichen Grüßen/Best Regards
Josef Kropf
(Senior System Administrator)
Lyoness Group AG
Von: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] Im Auftrag von Alexander Griesser
Gesendet: Mittwoch, 11. November 2015 09:19
An: toasters@teaparty.net
Betreff: How to verify the health of all disks?
Hi Toasters,
I had a pretty stunning experience on a customer’s used filer installation yesterday, long story short:
FSA2040 with 1xDS4243 24x1TB SATA disks, had to reinitialize the whole system because controller and shelves have been procured from different sources, so there was no root volume, etc.
After I figured the disk reassignment out and have wiped both filers, they both booted up with a 3 disk aggr0 raid_dp and I could start to work on it.
I then added a bunch of disks to filer #1 and continued with the configuration, until I found out, that some of the disks would not allow the firmware to be updated. The disks in question look like this:
*> disk_list
DISK CHAN VENDOR PRODUCT ID REV SERIAL# HW (BLOCKS BPS) DQ
------------ ----- -------- ---------------- ---- -------------------- -- -------------- --
0d.11.2 SA:A NETAPP X302_WVULC01TSSM 4321 WD-WCAW30821984 ff 1953525168 512 N
Working disks look like this:
*> disk_list
DISK CHAN VENDOR PRODUCT ID REV SERIAL# HW (BLOCKS BPS) DQ
------------ ----- -------- ---------------- ---- -------------------- -- -------------- --
0d.11.0 SA:A NETAPP X302_WVULC01TSSM NA02 WD-WCAW31217461 ff 1953525168 512 N
I’ve googled a bit and found out that disks showing up with REV „4321“ need to be replaced, there seems to have been a series of disks in the past with this error, so what I did was I pulled one of those disks out of the filer and replaced it with another one.
The system immediately started to reconstruct the now missing filesystem disk from the spare disk, when the log started to fill up about block errors on other disks during reconstruction, then about 10 minutes later, a double reconstruct was running and about 30 minutes later, the filer paniced due to multi disk failure and that’s where I ended up then.
So since there was no data on the filer, I wiped it again and am now back up and running with 3 disks in aggr0 and I’m currently replacing one of the „4321“ disks with another one:
*> disk replace start 0d.11.2 0d.11.3
aggr status -r
Aggregate aggr0 (online, raid_dp) (block checksums)
Plex /aggr0/plex0 (online, normal, active)
RAID group /aggr0/plex0/rg0 (normal, block checksums)
RAID Disk Device HA SHELF BAY CHAN Pool Type RPM Used (MB/blks) Phys (MB/blks)
--------- ------ ------------- ---- ---- ---- ----- -------------- --------------
dparity 0d.11.0 0d 11 0 SA:A - BSAS 7200 847555/1735794176 847884/1736466816
parity 0d.11.1 0d 11 1 SA:A - BSAS 7200 847555/1735794176 847884/1736466816
data 0d.11.2 0d 11 2 SA:A - BSAS 7200 847555/1735794176 847884/1736466816 (replacing, copy in progress)
-> copy 0d.11.3 0d 11 3 SA:A - BSAS 7200 847555/1735794176 847884/1736466816 (copy 0% completed)
The question now is: since the spare disks were all properly zeroed and there were no entries in the logs that would show me block errors on these disks, how can I verify, all my spare disks are really good? I’d love to run an intensive test on all the disks in order to make sure something like that doesn’t happen again when I put the filer in production.
I’m very thankful for any advice in this regard.
Is disk maint used for things like that?
*> disk maint list
Disk maint tests available
Test index: 0 Test Id: ws Test name: Write Same Test
Test index: 1 Test Id: ndst Test name: NDST Test
Test index: 2 Test Id: endst Test name: Extended NDST Test
Test index: 3 Test Id: vt Test name: Verify Test
Test index: 4 Test Id: ss Test name: Start Stop Test
Test index: 5 Test Id: dt Test name: Data Integrity Test
Test index: 6 Test Id: rdt Test name: Read Test
Test index: 7 Test Id: pc Test name: Power Cycle Test
Thanks,
Alexander Griesser
Head of Systems Operations
ANEXIA Internetdienstleistungs GmbH
E-Mail: AGriesser@anexia-it.com
Anschrift Hauptsitz Klagenfurt: Feldkirchnerstraße 140, 9020 Klagenfurt
Geschäftsführer: Alexander Windbichler
Firmenbuch: FN 289918a | Gerichtsstand: Klagenfurt | UID-Nummer: AT U63216601