Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-25 Thread Manuel Ryan
Hey again, I'm back with some news from my situation. I tried taking out the faulty disk 5 and replacing it with a new disk, but the pool showed up as FAULTED. So I plugged the faulting disk back keeping the new disk in the machine, then ran a zpool replace. After the new disk resilvered

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-24 Thread Tim Cook
On Tue, Apr 24, 2012 at 12:16 AM, Matt Breitbach matth...@flash.shanje.comwrote: So this is a point of debate that probably deserves being brought to the floor (probably for the umpteenth time, but indulge me). I've heard from several people that I'd consider experts that once per year

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-24 Thread Jim Klimov
On 2012-04-24 19:14, Tim Cook wrote: Personally unless the dataset is huge and you're using z3, I'd be scrubbing once a week. Even if it's z3, just do a window on Sunday's or something so that you at least make it through the whole dataset at least once a month. +1 I guess Among other

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-24 Thread Richard Elling
On Apr 24, 2012, at 8:35 AM, Jim Klimov wrote: On 2012-04-24 19:14, Tim Cook wrote: Personally unless the dataset is huge and you're using z3, I'd be scrubbing once a week. Even if it's z3, just do a window on Sunday's or something so that you at least make it through the whole dataset at

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-23 Thread Jim Klimov
2012-04-23 9:35, Daniel Carosone wrote: I'll try to leave all 6 original disks in the machine while replacing, maybe zfs will be smart enough to use the 6 drives to build the replacement disk ? I don't think it will.. others who know the code, feel free to comment otherwise. Well, I've heard

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-23 Thread Matt Breitbach
So this is a point of debate that probably deserves being brought to the floor (probably for the umpteenth time, but indulge me). I've heard from several people that I'd consider experts that once per year scrubbing is sufficient, once per quarter is _possibly_ excessive, and once a week is

[zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-22 Thread Manuel Ryan
Hello, I have looked around this mailing list and other virtual spaces and I wasn't able to find a similar situation than this weird one. I have a 6 disks raidz zfs15 pool. After a scrub, the status of the pool and all disks still show up as ONLINE but two of the disks are starting to give me

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-22 Thread Bob Friesenhahn
On Mon, 23 Apr 2012, Manuel Ryan wrote: Do you guys also think I should change disk 5 first or am I missing something ? From your description, this sounds like the best course of action, but you should look at your system log files to see what sort of issues are being logged. Also consult

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-22 Thread Ian Collins
On 04/23/12 01:47 PM, Manuel Ryan wrote: Hello, I have looked around this mailing list and other virtual spaces and I wasn't able to find a similar situation than this weird one. I have a 6 disks raidz zfs15 pool. After a scrub, the status of the pool and all disks still show up as ONLINE but

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-22 Thread Daniel Carosone
On Mon, Apr 23, 2012 at 02:16:40PM +1200, Ian Collins wrote: If it were my data, I'd set the pool read only, backup, rebuild and restore. You do risk further data loss (maybe even pool loss) while the new drive is resilvering. You're definitely in a pickle. The first priority is to try

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-22 Thread Manuel Ryan
Thank you for this very detailed answer ! After a reboot of the machine, I have no more write errors on disk 2 (only 4 checksum, not growing), I was able to access data which I previously couldn't and now only the checksum errors on disk 5 are growing. Fortunately, I was able to recover all

Re: [zfs-discuss] Two disks giving errors in a raidz pool, advice needed

2012-04-22 Thread Daniel Carosone
On Mon, Apr 23, 2012 at 05:48:16AM +0200, Manuel Ryan wrote: After a reboot of the machine, I have no more write errors on disk 2 (only 4 checksum, not growing), I was able to access data which I previously couldn't and now only the checksum errors on disk 5 are growing. Well, that's good, but