2120S poor performance

Steven Hartland killing at multiplay.co.uk
Fri Dec 10 17:59:55 PST 2004

2015S is though which is what I tested and it gives very similar poor results
dmesg |grep asr:
asr0: ADAPTEC 2015S FW Rev. 3B05, 2 channel, 256 CCBs, Protocol I2O

Does anyone have any RAID5 SCSI card installed that does give good
results in a straight dd test?

>> The asr driver is in need of a lot of attention.
> ..
>> There are many quality, (relatively) cheap controllers out there, but if
>> you're looking to stick with Adaptec get a 2130S.  The 2130S uses the aac
>> driver, which is quite well tuned and maintained by Scott Long.
> The Adaptec SCSI RAID 2120S is not an I2O(asr) controller -- it is an
> aac(4) controller.  The 'out of market' controller mentioned in this
> thread is the work horse 5400S.

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