ZFS

This is another in the series of shrinking zpools. In this test, I’m repeating the previous test, only with UEFI, not BIOS, boot partitions. Partitioning root@r730-04:/home/dvl # gpart create -s gpt mfisyspd0 mfisyspd0 created root@r730-04:/home/dvl # gpart create -s gpt mfisyspd1 mfisyspd1 created root@r730-04:/home/dvl # gpart create -s gpt mfisyspd2 mfisyspd2 created root@r730-04:/home/dvl # gpart create -s gpt mfisyspd3 mfisyspd3 created root@r730-04:/home/dvl # gpart add -t efi -s 260M -a 4k mfisyspd0 mfisyspd0p1

After succeeding with whole drives and with partitioned drives, I’m ready to try with more complex partitions. This is a repeat of the failed attempt a few days ago. Parition creation The partitions are created Create the schema: root@r730-04:/home/dvl # gpart create -s gpt /dev/mfisyspd0 mfisyspd0 created root@r730-04:/home/dvl # gpart create -s gpt /dev/mfisyspd1 mfisyspd1 created root@r730-04:/home/dvl # gpart create -s gpt /dev/mfisyspd2 mfisyspd2 created root@r730-04:/home/dvl # gpart create -s gpt /dev/mfisyspd3 mfisyspd3

After yesterday’s failure to shrink a parition-based zpool. After reading this post, you want also want to read this other successful post. You will recall that expedition ended with: dvl@r730-04:~ $ zpool add zroot mirror /dev/da2p3 /dev/da3p3 cannot use ‘/dev/da2p3′: must be a block device or regular file Today, I’m going to try the same thing with whole disks, just to see if that works. You might also want to read Moving a

Today I was setting up some drives for testing. I did this manually: root@r730-04:~ # gpart create -s gpt da2 da2 created root@r730-04:~ # gpart add -t efi -s 260M -a 4k da2 da2p1 added root@r730-04:~ # gpart add -t freebsd-swap -s 8G -a 4k da2 da2p2 added root@r730-04:~ # gpart add -t freebsd-zfs -a 4k da2 da2p3 added root@r730-04:~ # gpart show da2 => 40 62533216 da2 GPT (30G) 40 532480 1

If you read my recent posts, I’m replacing an existing zpool with new devices. At first, I went to copy the old zpool to a new zpool. I then decided instead of copying, to replace. I’m also going to see about compression. I’m sure it won’t take effect, because replace is a block-by-block copy, or so I think. We’ll confirm. Before Here is the zpool, really, just the top-level filesystem. Notice how compression

This morning, as I was typing the subject of this blog post, I realized I don’t have to do this copying. The new devices are staying in this host. It is better for me to add the new devices to the zpool and remove the old devices. That is so much easier. The existing zpool can stay in use and there is no interruption in service. NOTE: after publishing this entry, I realized