2120S poor performance

[Mike Jakubik]

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.