ahd(4) poor performance

[Volodymyr Kostyrko]

Ade Lovett wrote:
>> Hi all.
>>
>>   I have:
>>
>> ahd0: <Adaptec (Dell OEM) 39320 Ultra320 SCSI adapter> port 
>> 0xdc00-0xdcff,0xd800-0xd8ff mem 0xdfbfe000-0xdfbfffff irq 66 at device 
>> 7.0 on pci3
> 
> [snip]
> 
> What disks are you using on the controller chain?

da0 at ahd0 bus 0 target 0 lun 0
da0: <SEAGATE ST373307LW DS09> Fixed Direct Access SCSI-3 device
da0: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged 
Queueing Enabled
da0: 70007MB (143374650 512 byte sectors: 255H 63S/T 8924C)
da1 at ahd0 bus 0 target 1 lun 0
da1: <SEAGATE ST373207LW D702> Fixed Direct Access SCSI-3 device
da1: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged 
Queueing Enabled
da1: 70007MB (143374650 512 byte sectors: 255H 63S/T 8924C)
cd0 at ata0 bus 0 target 0 lun 0
cd0: <TEAC CD-224E K.9A> Removable CD-ROM SCSI-0 device
cd0: 3.300MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present

> camcontrol devlist -v  output would be useful

scbus0 on ahd0 bus 0:
<SEAGATE ST373307LW DS09>          at scbus0 target 0 lun 0 (pass0,da0)
<SEAGATE ST373207LW D702>          at scbus0 target 1 lun 0 (pass1,da1)
<  >                               at scbus0 target -1 lun -1 ()
scbus1 on ahd1 bus 0:
<  >                               at scbus1 target -1 lun -1 ()
scbus2 on ata0 bus 0:
<TEAC CD-224E K.9A>                at scbus2 target 0 lun 0 (pass2,cd0)
<  >                               at scbus2 target -1 lun -1 ()
scbus3 on ata1 bus 0:
<  >                               at scbus3 target -1 lun -1 ()
scbus-1 on xpt0 bus 0:
<  >                               at scbus-1 target -1 lun -1 (xpt0)

-- 
[WBR], Arcade.