Because initially Predrag Zečević asked about ZFS with ashift 9 and ashift 12, I think this the same as
https://www.illumos.org/issues/5242 "zpool won't allow attachment of larger sector drive to mirror" I was not aware of "zdb -C rpool" the value "ashift". According to: https://jrs-s.net/2018/08/17/zfs-tuning-cheat-sheet/ "Ashift tells ZFS what the underlying physical block size your disks use is. It’s in bits, so ashift=9 means 512B sectors (used by all ancient drives), ashift=12 means 4K sectors (used by most modern hard drives), and ashift=13 means 8K sectors (used by some modern SSDs)." So I think the question that is being asked here is whether you can mirror between drives of different sector size. According to https://www.illumos.org/issues/5242 which is flagged as 'open' this is not the case. Regards, David Stes ----- Op 8 mar 2023 om 11:55 schreef Discussion list for OpenIndiana openindiana-discuss@openindiana.org: >> On 8. Mar 2023, at 02:27, Bill Sommerfeld <sommerf...@hamachi.org> wrote: >> >> On 3/7/23 13:53, gea wrote: >>> I suppose a method based on mirror/clone + autoexpand will not work with >>> different ashift. >>> A disaster backup/recovery method that should work: >>> - replicate current BE to datapool via zfs send >>> (you can create daily recoverable backups while OI is running with this >>> method) >> >> If you can have all the disks cabled up at the same time, you can use the >> '-p' >> option to 'beadm create' to create a BE in a different pool; I've used this >> to >> move the root a few times (the root pool on one of my machines is currently >> named "r3”). >> > > With this method, you need to keep in mind, only dataset tree from ROOT will > be > replicated. You still need to migrate/re-create other datasets like export, > swap, dump. Also need to update dumpadm and /etc/vfstab (for swap). > > rgds, > toomas > _______________________________________________ > openindiana-discuss mailing list > openindiana-discuss@openindiana.org > https://openindiana.org/mailman/listinfo/openindiana-discuss _______________________________________________ openindiana-discuss mailing list openindiana-discuss@openindiana.org https://openindiana.org/mailman/listinfo/openindiana-discuss
