[zfs-discuss] Replacing a drive using ZFS
We have a system with two drives in it, part UFS, part ZFS. It's a software mirrored system with slices 0,1,3 setup as small UFS slices, and slice 4 on each drive being the ZFS slice. One of the drives is failing and we need to replace it. I just want to make sure I have the correct order of things before I do this. This is our pool: NAME STATE READ WRITE CKSUM mainpoolONLINE 0 0 0 mirror ONLINE 0 0 0 c0t0d0s4 ONLINE 0 0 243 c0t1d0s4 ONLINE 0 0 0 1) zpool detach mainpool c0t0d0s4 2) powerdown system, replace faulty drive 3) reboot system, setup slices to match the current setup 4) zpool add mainpool c0t0d0s4 This will add the new drive back into the mirrored pool and sync the new slice 4 back into the mirror, correct? This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Replacing a drive using ZFS
Matt Cohen wrote: We have a system with two drives in it, part UFS, part ZFS. It's a software mirrored system with slices 0,1,3 setup as small UFS slices, and slice 4 on each drive being the ZFS slice. One of the drives is failing and we need to replace it. I just want to make sure I have the correct order of things before I do this. This is our pool: NAME STATE READ WRITE CKSUM mainpoolONLINE 0 0 0 mirror ONLINE 0 0 0 c0t0d0s4 ONLINE 0 0 243 c0t1d0s4 ONLINE 0 0 0 1) zpool detach mainpool c0t0d0s4 2) powerdown system, replace faulty drive 3) reboot system, setup slices to match the current setup 4) zpool add mainpool c0t0d0s4 ^^^ I think you want to use 'zpool attach' here to create a two-way mirror, right? Dana ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Replacing a drive using ZFS
Matt, Generally, when a disk needs to be replaced, you replace the disk, use the zpool replace command, and you're done... This is only a little more complicated in your scenario below because of the sharing the disk between ZFS and UFS. Most disks are hot-pluggable so you generally don't need to shut down the system to replace the disk, but only you know if your disks are hot-pluggable. In addition, if the disk is shared between UFS and ZFS contains important system files, then you might need to bring the system down. However, you don't need to use zpool detach or zpool add if you are just replacing the disk. The steps would look like this: 1. Shut down the system (if necessary) 2. Replace the faulty disk 3. Set up the slices on replacement disk as needed 4. Bring the system back up (if necessary) 5. Run this command: # zpool replace mainpool c0t0d0s4 Let us know how it goes, particularly me, since I need to know if this works as documented. :-) Thanks, Cindy Matt Cohen wrote: We have a system with two drives in it, part UFS, part ZFS. It's a software mirrored system with slices 0,1,3 setup as small UFS slices, and slice 4 on each drive being the ZFS slice. One of the drives is failing and we need to replace it. I just want to make sure I have the correct order of things before I do this. This is our pool: NAME STATE READ WRITE CKSUM mainpoolONLINE 0 0 0 mirror ONLINE 0 0 0 c0t0d0s4 ONLINE 0 0 243 c0t1d0s4 ONLINE 0 0 0 1) zpool detach mainpool c0t0d0s4 2) powerdown system, replace faulty drive 3) reboot system, setup slices to match the current setup 4) zpool add mainpool c0t0d0s4 This will add the new drive back into the mirrored pool and sync the new slice 4 back into the mirror, correct? This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Replacing a drive using ZFS
Matt, Also, since you only have two drives and are using software mirroring for the UFS slices, you'll need to follow the proper procedures for the software mirroring metadata replicas. See the pertinent docs for details. -- richard [EMAIL PROTECTED] wrote: Matt, Generally, when a disk needs to be replaced, you replace the disk, use the zpool replace command, and you're done... This is only a little more complicated in your scenario below because of the sharing the disk between ZFS and UFS. Most disks are hot-pluggable so you generally don't need to shut down the system to replace the disk, but only you know if your disks are hot-pluggable. In addition, if the disk is shared between UFS and ZFS contains important system files, then you might need to bring the system down. However, you don't need to use zpool detach or zpool add if you are just replacing the disk. The steps would look like this: 1. Shut down the system (if necessary) 2. Replace the faulty disk 3. Set up the slices on replacement disk as needed 4. Bring the system back up (if necessary) 5. Run this command: # zpool replace mainpool c0t0d0s4 Let us know how it goes, particularly me, since I need to know if this works as documented. :-) Thanks, Cindy Matt Cohen wrote: We have a system with two drives in it, part UFS, part ZFS. It's a software mirrored system with slices 0,1,3 setup as small UFS slices, and slice 4 on each drive being the ZFS slice. One of the drives is failing and we need to replace it. I just want to make sure I have the correct order of things before I do this. This is our pool: NAME STATE READ WRITE CKSUM mainpoolONLINE 0 0 0 mirror ONLINE 0 0 0 c0t0d0s4 ONLINE 0 0 243 c0t1d0s4 ONLINE 0 0 0 1) zpool detach mainpool c0t0d0s4 2) powerdown system, replace faulty drive 3) reboot system, setup slices to match the current setup 4) zpool add mainpool c0t0d0s4 This will add the new drive back into the mirrored pool and sync the new slice 4 back into the mirror, correct? This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
