I am having a little trouble decoding the documentation on "sunit" and
"swidth" w.t.t. my raid controller.
Some background:
I have a Mylex Acceleraid352 controller running a system drive in raid-5 and
a data drive in raid-0. The default stripe width on the controller is 64K,
and a segment size of 8k, and this is what the driver's documentation says
about configuring ext2 filesystems:
"For maximum performance and the most efficient E2FSCK performance, it is
recommended that EXT2 file systems be built with a 4KB block size and 16
block stride to match the DAC960 controller's 64KB default stripe size. The
command "mke2fs -b 4096 -R stride=16 <device>" is appropriate."
For XFS, I haven't been able to find sufficient information to figure out
whether it is sunit or swidth that is analagous to the "stride" or "stripe
width" of 64K? It sounds to me like swidth, in which case would sunit be set
to the segment size of 8k?
I'm probably going over ground that's been covered previously on this list,
but didn't have much luck finding it in the archive or the documentation.
Thanks for the help,
Murthy
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