Re: [zfs-discuss] root pool mirror problems
Hi Roi, You need equivalent sized disks for a mirrored pool. When you attempt to attach a disk that is too small, you will see a message similar to the following: cannot attach c1t3d0 to c1t2d0: device is too small In general, an "I/O error" message means that the partition slice is not available or ZFS is having trouble accessing the disk so you might have multiple issues to resolve. Review the ZFS troubleshooting wiki for info on resolving the I/O error, here: http://www.solarisinternals.com/wiki/index.php/ZFS_Troubleshooting_Guide Thanks, Cindy On 05/20/10 02:39, roi shidlovsky wrote: hi. i am trying to attach a mirror disk to my root pool. if the two disk are the same size.. it all works fine, but if the two disks are with different size (8GB and 7.5GB) i get a "I/O error" on the attach command. can anybody tell me what am i doing wrong? ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] root pool mirror problems
- "roi shidlovsky" skrev: > hi. > i am trying to attach a mirror disk to my root pool. if the two disk > are the same size.. it all works fine, but if the two disks are with > different size (8GB and 7.5GB) i get a "I/O error" on the attach > command. > > can anybody tell me what am i doing wrong? I think the best way to solve this will be to slice up the drives. If the difference is as large as this, slices are likely to help you there. As others have mentioned, you can attach an 8GB mirror to a 7,5GB drive, but then, if you have autogrow=on and detach the 7,5GB drive and try to attach another 7,5GB drive, I don't think it'll work very well. Again, I'd use slices. I think, though, osol disables write cache if working with slices, and not drives. A also think this can be forced to on, but I don't know how Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 r...@karlsbakk.net http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] root pool mirror problems
As queried by Ian, the new disk being attached must be at least as big as the original root pool disk. It can be bigger, but the difference will not be used in the mirroring. cheers Matt On 05/20/10 10:11 AM, Ian Collins wrote: On 05/20/10 08:39 PM, roi shidlovsky wrote: hi. i am trying to attach a mirror disk to my root pool. if the two disk are the same size.. it all works fine, but if the two disks are with different size (8GB and 7.5GB) i get a "I/O error" on the attach command. can anybody tell me what am i doing wrong? Trying to mirror a larger disk with a smaller one? Recent builds can cope with a small difference to allow for variations between models of the same nominal size, but not 500MB. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] root pool mirror problems
On 05/20/10 08:39 PM, roi shidlovsky wrote: hi. i am trying to attach a mirror disk to my root pool. if the two disk are the same size.. it all works fine, but if the two disks are with different size (8GB and 7.5GB) i get a "I/O error" on the attach command. can anybody tell me what am i doing wrong? Trying to mirror a larger disk with a smaller one? Recent builds can cope with a small difference to allow for variations between models of the same nominal size, but not 500MB. -- Ian. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] root pool mirror problems
hi. i am trying to attach a mirror disk to my root pool. if the two disk are the same size.. it all works fine, but if the two disks are with different size (8GB and 7.5GB) i get a "I/O error" on the attach command. can anybody tell me what am i doing wrong? -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
