Help with Vinum disk crash...
Greg 'groggy' Lehey
grog at FreeBSD.org
Sun Feb 22 20:31:18 PST 2004
On Friday, 20 February 2004 at 9:22:21 +1100, Tony Frank wrote:
> On Thu, Feb 19, 2004 at 09:46:35AM +0100, Danny Carroll wrote:
>> Thanks for the information... I really need the space now so I am going to wipe
>> it and start from scratch, although I am not sure if I will use vinum again.
>> I guess my main concern is that when one of my disks crashed, the ufs filesystem
>> got corrupted and I really did not expect that to happen.
>> It could be ignorance on my part, I dont know but perhaps someone can help me
>> understand how this could have happened?
> Filesystems can get corrupted if the system crashes and does not cleanly close the
> filesystem first.
> In your case I'm personally not too sure - some more questions perhaps can help.
The kind of corruption caused by an unclean shutdown is nothing like
> - Were you using softupdates on the filesystem?
This shouldn't make any difference.
> - Did the system panic/reboot when the disk crashed without shutting down cleanly?
> - What version of FreeBSD are you / were you running?
>> Another thing, Greg, you mentioned that I should have a second plex if I wanted
>> to protect the data. You mean like a mirror? Surely 1 is enough when we are
>> talking raid-5?
> Raid-5 should still work if a single subdisk fails.
> In your original post you did not indicate if you were using raid5 setup.
Yes, he did:
V data State: up Plexes: 1 Size: 320 GB
P data.p0 R5 State: degraded Subdisks: 4 Size: 320 GB
S data.p0.s0 State: stale PO: 0 B Size: 106 GB
S data.p0.s1 State: up PO: 3924 kB Size: 106 GB
S data.p0.s2 State: up PO: 7848 kB Size: 106 GB
S data.p0.s3 State: up PO: 11 MB Size: 106 GB
The "R5" on the plex line indicates that it's RAID-5.
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