You're perfectly correct. After I put the command together, I realised that I'd made a mistake in putting raidz in there.
The balance of partitions and using those instead of drives... I hadn't thought of that. I guess I'm just too used to thinking at the drive level for ZFS. On Wed, 2021-12-01 at 15:33 +0000, James wrote: > On 01/12/2021 11:55, Michelle wrote: > > I have closing on 12TB of data so even the 10 won't be enough to > > back > > everything up, but this is as much for the exercise of doing it, as > > achieving anything solid. It won't be under pressure, but I'd > > rather > > push the envelope and see what I can do. > > > > So how would the command go? > > > > zpool create tank raidz mirror drive1 drive2 mirror drive3 drive4 > > drive5 > > > > ...which is where I come unstuck with the 2TB drive in the mix. > > You are right to be stuck as ZFS can not make a mirror of raid0 in > one > command, zfs is wanting raid0 of mirrors which you can't get to 10TB > because you don't have pairs. You can pair the 4&6 and raid0 with > 4&4 > and get 8TB of continuous pool. > > Partition the 6 into 4 and 2, then you have pairs for raid0 of > mirrors. > Loose the 6TB and you loose 1/2 of 2 mirrors but you are better off > than > loosing 1/2 the entire mirror with mirror of raid0. 10TB using all > devices. > > Try making 2 raid0 pools 2+4+4 and 4+6, create volumes on those > pools > and use to make a mirror, /dev/zvol/dsk/etc... Untested and I can't > see > it being better. > > Use raidz1 of 4, 4, 4, and 6 = 12TB. This ignore 2TB of the 6 and > you > get a bonus doorstop by not using the 2TB. 3+1 is not a preferred > arrangement. > > _______________________________________________ > 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
