zfsonlinux/zfs — pull request #2427 by behlendorf (2014-06-26 23:55:53+00:00)
Title: Improve differing sector size error

When adding or replacing a vdev with a different sector size the
error message should be more useful. In addition to describing
the problem provide a hint that the '-o ashift' option can be
used to override the optimal default value.

Since using a non-optimal value may incur a significant performance
penalty we should issue this error. But there a numerous reasons
why a administrator may wish to do this anyway.

Signed-off-by: Brian Behlendorf
Issue #2421