Re: [zfs-discuss] zpool split failing
Hi Matt, Regarding this issue: >As an aside, I have noticed that on the old laptop, it would not boot >if the USB part of the mirror was not attached to the laptop, >successful boot could only be achieved when both mirror devices were >online. Is this a know issue with ZFS ? bug ? Which Solaris release is this? I see related bugs are fixed so I'm not sure what is going on here. I detach mirrored root pool disks and booting is not impacted. The best method is to let ZFS know that the device is detached before the reboot, like this: # zpool detach rpool usb-disk Thanks, Cindy On 04/17/12 04:47, Matt Keenan wrote: Hi Cindy, Tried out your example below in a vbox env, and detaching a device from a pool makes that device simply unavailable. and simply cannot be re-imported. I then tried setting up a mirrored rpool within a vbox env, agreed one device is not USB however, when booted into the rpool, split worked, I then tried booting directly into the rpool on the faulty laptop, and split still failed. My only conclusion for failure is - The rpool I'm attempting to split has a LOT of history been around for some 2 years now, so has gone through a lot of upgrades etc, there may be some ZFS history there that's not letting this happen, BTW the version is 33 which is current. - or is it possible that one of the devices being a USB device is causing the failure ? I don't know. My reason for splitting the pool was so I could attach the clean USB rpool to another laptop and simply attach the disk from the new laptop, let it resilver, installgrub to new laptop disk device and boot it up and I would be back in action. As a workaround I'm trying to simply attach my USB rpool to the new laptop and use zfs replace to effectively replace the offline device with the new laptop disk device. So far so good, 12% resilvering, so fingers crossed this will work. As an aside, I have noticed that on the old laptop, it would not boot if the USB part of the mirror was not attached to the laptop, successful boot could only be achieved when both mirror devices were online. Is this a know issue with ZFS ? bug ? cheers Matt On 04/16/12 10:05 PM, Cindy Swearingen wrote: Hi Matt, I don't have a way to reproduce this issue and I don't know why this is failing. Maybe someone else does. I know someone who recently split a root pool running the S11 FCS release without problems. I'm not a fan of root pools on external USB devices. I haven't tested these steps in a while but you might try these steps instead. Make sure you have a recent snapshot of your rpool on the unhealthy laptop. 1. Ensure that the existing root pool and disks are healthy. # zpool status -x 2. Detach the USB disk. # zpool detach rpool disk-name 3. Connect the USB disk to the new laptop. 4. Force import the pool on the USB disk. # zpool import -f rpool rpool2 5. Device cleanup steps, something like: Boot from media and import rpool2 as rpool. Make sure the device info is visible. Reset BIOS to boot from this disk. On 04/16/12 04:12, Matt Keenan wrote: Hi Attempting to split a mirrored rpool and fails with error : Unable to split rpool: pool already exists I have a laptop with main disk mirrored to an external USB. However as the laptop is not too healthy I'd like to split the pool into two pools and attach the external drive to another laptop and mirror it to the new laptop. What I did : - Booted laptop into an live DVD - Import the rpool: $ zpool import rpool - Attempt to split : $ zpool split rpool rpool-ext" - Error message shown and split fails : Unable to split rpool: pool already exists - So I tried exporting the pool and re-importing with a different name and I still get the same error. There are no other zpools on the system, both zpool list and zpool export return nothing other than the rpool I've just imported. I'm somewhat stumped... any ideas ? cheers Matt ___ 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] zpool split failing
On 04/17/12 01:00 PM, Jim Klimov wrote: 2012-04-17 14:47, Matt Keenan wrote: - or is it possible that one of the devices being a USB device is causing the failure ? I don't know. Might be, I've got little experience with those beside LiveUSB imagery ;) My reason for splitting the pool was so I could attach the clean USB rpool to another laptop and simply attach the disk from the new laptop, let it resilver, installgrub to new laptop disk device and boot it up and I would be back in action. If the USB disk split-off were to work, I'd rather try booting the laptop off the USB disk, if BIOS permits, or I'd boot off a LiveCD/LiveUSB (if Solaris 11 has one - or from installation media and break out into a shell) and try to import the rpool from USB disk and then attach the laptop's disk to it to resilver. This is exactly what I am doing, booted new laptop into LiveCD, imported USB pool, and zpool replacing the old laptop disk device which is in degraded state, with the new laptop disk device (after I partitioned to keep windows install). As a workaround I'm trying to simply attach my USB rpool to the new laptop and use zfs replace to effectively replace the offline device with the new laptop disk device. So far so good, 12% resilvering, so fingers crossed this will work. Won't this overwrite the USB disk with the new laptop's (empty) disk? The way you describe it... No the offline disk in this instance is the old laptop's internal disk, the online device is the USB drive. As an aside, I have noticed that on the old laptop, it would not boot if the USB part of the mirror was not attached to the laptop, successful boot could only be achieved when both mirror devices were online. Is this a know issue with ZFS ? bug ? Shouldn't be as mirrors are to protect against the disk failures. What was your rpool's "failmode" zpool-level attribute? It might have some relevance, but should define kernel's reaction to "catastrophic failures" of the pool, and loss of a mirror's side IMHO should not be one?.. Try failmode=continue and see if that helps the rpool, to be certain. I think that's what the installer should have done. Exactly what I would have thought ZFS should actually help here not hinder. From what I can see the default failmode as set by install is "wait" which is exactly what is happening when I attempt to boot. Just tried setting zpool failmode=continue and unfortunately still fails to boot, failmode=wait is definitely the default. cheers Matt ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] zpool split failing
2012-04-17 14:47, Matt Keenan wrote: - or is it possible that one of the devices being a USB device is causing the failure ? I don't know. Might be, I've got little experience with those beside LiveUSB imagery ;) My reason for splitting the pool was so I could attach the clean USB rpool to another laptop and simply attach the disk from the new laptop, let it resilver, installgrub to new laptop disk device and boot it up and I would be back in action. If the USB disk split-off were to work, I'd rather try booting the laptop off the USB disk, if BIOS permits, or I'd boot off a LiveCD/LiveUSB (if Solaris 11 has one - or from installation media and break out into a shell) and try to import the rpool from USB disk and then attach the laptop's disk to it to resilver. As a workaround I'm trying to simply attach my USB rpool to the new laptop and use zfs replace to effectively replace the offline device with the new laptop disk device. So far so good, 12% resilvering, so fingers crossed this will work. Won't this overwrite the USB disk with the new laptop's (empty) disk? The way you describe it... As an aside, I have noticed that on the old laptop, it would not boot if the USB part of the mirror was not attached to the laptop, successful boot could only be achieved when both mirror devices were online. Is this a know issue with ZFS ? bug ? Shouldn't be as mirrors are to protect against the disk failures. What was your rpool's "failmode" zpool-level attribute? It might have some relevance, but should define kernel's reaction to "catastrophic failures" of the pool, and loss of a mirror's side IMHO should not be one?.. Try failmode=continue and see if that helps the rpool, to be certain. I think that's what the installer should have done. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] zpool split failing
Hi Cindy, Tried out your example below in a vbox env, and detaching a device from a pool makes that device simply unavailable. and simply cannot be re-imported. I then tried setting up a mirrored rpool within a vbox env, agreed one device is not USB however, when booted into the rpool, split worked, I then tried booting directly into the rpool on the faulty laptop, and split still failed. My only conclusion for failure is - The rpool I'm attempting to split has a LOT of history been around for some 2 years now, so has gone through a lot of upgrades etc, there may be some ZFS history there that's not letting this happen, BTW the version is 33 which is current. - or is it possible that one of the devices being a USB device is causing the failure ? I don't know. My reason for splitting the pool was so I could attach the clean USB rpool to another laptop and simply attach the disk from the new laptop, let it resilver, installgrub to new laptop disk device and boot it up and I would be back in action. As a workaround I'm trying to simply attach my USB rpool to the new laptop and use zfs replace to effectively replace the offline device with the new laptop disk device. So far so good, 12% resilvering, so fingers crossed this will work. As an aside, I have noticed that on the old laptop, it would not boot if the USB part of the mirror was not attached to the laptop, successful boot could only be achieved when both mirror devices were online. Is this a know issue with ZFS ? bug ? cheers Matt On 04/16/12 10:05 PM, Cindy Swearingen wrote: Hi Matt, I don't have a way to reproduce this issue and I don't know why this is failing. Maybe someone else does. I know someone who recently split a root pool running the S11 FCS release without problems. I'm not a fan of root pools on external USB devices. I haven't tested these steps in a while but you might try these steps instead. Make sure you have a recent snapshot of your rpool on the unhealthy laptop. 1. Ensure that the existing root pool and disks are healthy. # zpool status -x 2. Detach the USB disk. # zpool detach rpool disk-name 3. Connect the USB disk to the new laptop. 4. Force import the pool on the USB disk. # zpool import -f rpool rpool2 5. Device cleanup steps, something like: Boot from media and import rpool2 as rpool. Make sure the device info is visible. Reset BIOS to boot from this disk. On 04/16/12 04:12, Matt Keenan wrote: Hi Attempting to split a mirrored rpool and fails with error : Unable to split rpool: pool already exists I have a laptop with main disk mirrored to an external USB. However as the laptop is not too healthy I'd like to split the pool into two pools and attach the external drive to another laptop and mirror it to the new laptop. What I did : - Booted laptop into an live DVD - Import the rpool: $ zpool import rpool - Attempt to split : $ zpool split rpool rpool-ext" - Error message shown and split fails : Unable to split rpool: pool already exists - So I tried exporting the pool and re-importing with a different name and I still get the same error. There are no other zpools on the system, both zpool list and zpool export return nothing other than the rpool I've just imported. I'm somewhat stumped... any ideas ? cheers Matt ___ 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] zpool split failing
Hi Matt, I don't have a way to reproduce this issue and I don't know why this is failing. Maybe someone else does. I know someone who recently split a root pool running the S11 FCS release without problems. I'm not a fan of root pools on external USB devices. I haven't tested these steps in a while but you might try these steps instead. Make sure you have a recent snapshot of your rpool on the unhealthy laptop. 1. Ensure that the existing root pool and disks are healthy. # zpool status -x 2. Detach the USB disk. # zpool detach rpool disk-name 3. Connect the USB disk to the new laptop. 4. Force import the pool on the USB disk. # zpool import -f rpool rpool2 5. Device cleanup steps, something like: Boot from media and import rpool2 as rpool. Make sure the device info is visible. Reset BIOS to boot from this disk. On 04/16/12 04:12, Matt Keenan wrote: Hi Attempting to split a mirrored rpool and fails with error : Unable to split rpool: pool already exists I have a laptop with main disk mirrored to an external USB. However as the laptop is not too healthy I'd like to split the pool into two pools and attach the external drive to another laptop and mirror it to the new laptop. What I did : - Booted laptop into an live DVD - Import the rpool: $ zpool import rpool - Attempt to split : $ zpool split rpool rpool-ext" - Error message shown and split fails : Unable to split rpool: pool already exists - So I tried exporting the pool and re-importing with a different name and I still get the same error. There are no other zpools on the system, both zpool list and zpool export return nothing other than the rpool I've just imported. I'm somewhat stumped... any ideas ? cheers Matt ___ 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] zpool split failing
Hi Attempting to split a mirrored rpool and fails with error : Unable to split rpool: pool already exists I have a laptop with main disk mirrored to an external USB. However as the laptop is not too healthy I'd like to split the pool into two pools and attach the external drive to another laptop and mirror it to the new laptop. What I did : - Booted laptop into an live DVD - Import the rpool: $ zpool import rpool - Attempt to split : $ zpool split rpool rpool-ext" - Error message shown and split fails : Unable to split rpool: pool already exists - So I tried exporting the pool and re-importing with a different name and I still get the same error. There are no other zpools on the system, both zpool list and zpool export return nothing other than the rpool I've just imported. I'm somewhat stumped... any ideas ? cheers Matt ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
