Eric Schrock wrote:
One thing I would pay attention to is the future world of native ZFS
root. On a thumper, you only have two drives which are bootable from
the BIOS. For any application in which reliability is important, you
would have these two drives mirrored as your root filesystem. There can
be no hot spares for this pool, because any device you hot spare in will
not be readable from the BIOS.
For all the Thumper raidz2 models, I would assume only having 46 disks.
This gives a nice bias towards one of the following configurations:
- 5x(7+2), 1 hot spare, 21.0TB
- 4x(9+2), 2 hot spares, 18.0TB
- 6x(5+2), 4 hot spares, 15.0TB
And in order to mitigate the impact of the lack of root spares in the scenario
above, I'd go for plenty of hot spares, and do a manual swap of one hot-spare
with the failing root mirror.
Henk
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