Re: Adaptec 5805 SAS Raid

Glyn Astill wrote:
> Any of you chaps used this controller?
>

It looks very similar to the rebadged Adaptec that Sun shipped in the
X4150 I ordered a few weeks ago, though the Sun model had only 256MB of
cache RAM. I was wary of going Adaptec after my experiences with the
PERC/3i, which couldn't even seem to manage a single disk's worth of
read performance from a RAID-1 array, but I was pleasantly surprised by
this card. I'm only running a RAID-1 array on it, with 2 146GB 10krpm
SAS drives, but I was impressed with the read performance -- it seems
quite happy to split sequential reads across the two disks.

Here are the bonnie++ numbers I took during my run-in testing:

Version 1.03 ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
membrane 12G 54417 89 86808 15 41489 6 59517 96 125266 10
629.6 0
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
membrane 16 19496 97 +++++ +++ 14220 68 7673 40 +++++ +++
5246 26

I'm not sure if I'd yet be comfortable running a larger array for a
database on an Adaptec card, but it's definitely a great improvement on
the earlier Adaptec hardware I've used.

Thanks
Leigh

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