On Mon, 22 Apr 2013, Stan Hoeppner wrote:
On 4/21/2013 6:17 PM, Stan Hoeppner wrote:
It may not be necessary, at least to solve any SSD performance problems
anyway. Reexamining your numbers shows you hit 262MB/s to /dev/sda.
That's 65% of SATA2 interface bandwidth, so this kernel probably does
have the patch. Your problem lie elsewhere.
Big correction. That should state 87% of SATA2 interface bandwidth. I
must have been thinking of three things at once when I fubar'd that, as
that's not simply a typo.
As far as I know, the 300 megabyte/s of SATA2 bw doesn't include coding
overhead etc, so it's not theoretically possible to reach all the way up
to 300. From all tests I've seen, around 260-270 megabyte/s seems to be
maximum that can be achievable, so I'd say 262 MB/s is basically as much
as can be expected from SATA2.
--
Mikael Abrahamsson email: swmike@xxxxxxxxx
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