Re: ATA support for 4k sector size

[Martin K. Petersen]

>>>>> "david" == david  <david@xxxxxxx> writes:

david> even if we can't get them to give us any info from the drive
david> directly, we still want to allow the sysadmin to configure the
david> use of the systems when they can find the info in other ways.

You can specify RAID parameters on the mkfs.xfs command line today.
mke[234]fs have similar knobs.


david> if you have the smallest and largest I/O you can submit without a
david> penalty and the alignment, isn't the optimal I/O size everything
david> between these two? (or at least everything between these two may
david> be close enough that defining an 'optimal' size may not be
david> worthwhile)

These parameters come straight out of SCSI.  I described them wrong.
maximum is the biggest I/O the device can handle, full stop.  Optimal is
the preferred I/O size for the array.

-- 
Martin K. Petersen	Oracle Linux Engineering
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