aneip wrote:
I really new to zfs and also raid.
I have 3 hard disk, 500GB, 1TB, 1.5TB.
On each HD i wanna create 150GB partition + remaining space.
I wanna create raidz for 3x150GB partition. This is for my document + photo.
You should be able to create 150 GB slices on each drive, and then
create a RAIDZ1 out of those 3 slices.
As for the remaining I wanna create my video library. This one no need any
redundancy since I can simply backup my dvd again.
The question would be, if I create strip pool from the remaining space (350 +
850 + 1350 GB space). What happen if 1 of the HD failure. Do I loose some file
of I loose the whole pool?
Your remaining space can be configured as slices. These slices can be
added directly to a second pool without any redundancy. If any drive
fails, that whole non-redundant pool will be lost. Data recovery
attempts will likely find that any recoverable video is like
swiss-cheese, with gaps in it. This is because files are spread across
striped devices as they're written to increase read and write
performance. In a JBOD arrangement, however, some files might still be
complete, but I don't believe ZFS supports JBOD-style non-redundant
pools. For most people that is not a big deal, as part of the point of
ZFS is to focus on data integrity and performance, neither of which is
offered by JBOD (as it is still ruined by single device failures, it is
just that it is easier to carve files out of a JBOD than a broken RAID).
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