Date: Fri, 10 Dec 2004 22:41:05 -0500 (EST) From: "Mike Jakubik" <mikej@rogers.com> To: "Steven Hartland" <killing@multiplay.co.uk> Cc: Bill Anderson <anderson@wks.uts.ohio-state.edu> Subject: Re: 2120S poor performance Message-ID: <3304.172.16.0.200.1102736465.squirrel@172.16.0.200> In-Reply-To: <010b01c4df25$14af3ff0$b3db87d4@multiplay.co.uk> References: <Pine.GSO.4.33.0412081120520.4974-100000@lennier.uts.ohio-state.edu><17418.69.53.57.66.1102618255.squirrel@69.53.57.66> <20041211010849.GE50516@dragon.nuxi.com> <010b01c4df25$14af3ff0$b3db87d4@multiplay.co.uk>
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Steven Hartland said:
> 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?
This is what i get on the following (FreeBSD 5.3-STABLE #0: Sun Nov 7
03:25:47 EST 2004):
---
da0 at asr0 bus 0 target 0 lun 0
da0: <ADAPTEC RAID-10 3B0A> Fixed Direct Access SCSI-2 device
da0: Tagged Queueing Enabled
da0: 70006MB (143372288 512 byte sectors: 255H 63S/T 8924C)
# diskinfo -tv da0
da0
512 # sectorsize
73406611456 # mediasize in bytes (68G)
143372288 # mediasize in sectors
8924 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
Seek times:
Full stroke: 250 iter in 1.222343 sec = 4.889 msec
Half stroke: 250 iter in 1.189145 sec = 4.757 msec
Quarter stroke: 500 iter in 2.315375 sec = 4.631 msec
Short forward: 400 iter in 1.821531 sec = 4.554 msec
Short backward: 400 iter in 1.936996 sec = 4.842 msec
Seq outer: 2048 iter in 2.296997 sec = 1.122 msec
Seq inner: 2048 iter in 1.991383 sec = 0.972 msec
Transfer rates:
outside: 102400 kbytes in 3.810755 sec = 26871 kbytes/sec
middle: 102400 kbytes in 3.907428 sec = 26206 kbytes/sec
inside: 102400 kbytes in 3.235306 sec = 31651 kbytes/sec
---
I'm dissapointed in the transfer rates.. seek times however are nice.
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