Additional comment: zfs receive verifies the data sent. It also can maintain the snapshots, which is handy.
rsync will also verify the data sent between source and destination. rsync doesn't know anything about snapshots, though it might be a best practice to use a snapshot as an rsync source. I would consider both zfs send/receive and rsync to do a reasonable job of verifying data. rsync's --checksum option will work, if you double-pump the rsync. If you are truly paranoid, you can also create your own digests (eg. md5) of the files for comparison. -- richard cindy.swearin...@sun.com wrote: > Orvar, > > Two choices are described below, where safety is the priority. > I prefer the first one (A). > > Cindy > > A. Replace each 500GB disk in the existing pool with a 1 TB drive. > Then, add the 5th 1TB drive as a spare. Depending on the Solaris > release you are running, you might need to export/import the > pool to see the expanded capacity (as a step 8) due to an existing > bug. > > 1. Physically connect the new disks. > > 2. Replace the first disk. > > # zpool replace pool 500GB-1 1TB-1 > > 3. Let resilver complete, then scrub. > > # zpool scrub pool > > 4. Replace the second disk. > > # zpool replace pool 500GB-2 1TB-2 > > 5. Let resilver complete, then scrub. > > # zpool scrub pool > > 6. Repeat steps 2-5 until 4 disks are replaced. > > 7. Add 1TB-5 as a spare: > > # zpool add pool spare 1TB-5 > > B. Use zfs send/receive to copy ZFS datasets to new pool. > > 1. Physically connect the new disks. > > 2. Create the new pool with new disks. > > 3. Use zfs send/receive to copy ZFS datasets from old pool > to new pool. > > 4. Make sure all data is available in the new pool between each > zfs send/receive operation. Don't destroy the old pool until > all data is verified. > > > > > Orvar Korvar wrote: > >> I have a ZFS raid with 4 samsung 500GB disks. I now want 5 drives samsung >> 1TB instead. So I connect the 5 drives, create a zpool raidz1 and copy the >> content from the old zpool to the new zpool. >> >> Is there a way to safely copy the zpool? Make it sure that it really have >> been copied safely? Ideally I would like a tool that copies from source to >> destination and checks that the copy went through. A night mare would be if >> the copy get interrupted, and I have to copy again. How can I be sure that >> the new invocation has copied everything, from the interruption? Using gnu >> commander feels a bit unsafe. It will only copy blindly(?), and no more. >> Will it tell me if something went wrong? >> >> How do you make sure the copy has been correct? Is there any utility that >> does exactly that? (Does cp warn if there was any error?) >> > > _______________________________________________ > 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
