[OpenIndiana-discuss] ZFS improvements.

taemun taemun at gmail.com
Tue Nov 23 15:03:44 UTC 2010

If we're making a wishlist, something more immediate (and surely easy to
implement) would be a command line option for zpool create to change the
ashift value. This allows use of "Advanced Format" drives which have 4KB
internal sector size, and export them (incorrectly, for Windows XP) as 512B

zpool create -o ashift=12 tank c1t0d0 c1t1d0

This would provide immediate benefit to anyone wanting to use modern cheap
hard drives, where the user is compus enough to know what the system can't.

A more advanced option would be timing of read/write performance of
increasing block sizes (and offsets, if needed) in order to identify what
the physical sector size is (and its alignment). But purely manual is a good

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