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SubjectTagged cmnd queueing trouble in aic7xxx 5.0.19
Date
Hello,

I am using AIC-7XXX v5.0.19 (Adaptec 2842VL) with both Linux 2.0.34 and
2.1.105.

Drive information is below. To put it short:

sda - Micropolis 4345WS WIDE ULTRA QUEUEING
sdb - IBM DCAS 32160 ULTRA QUEUEING LINKING

Activating tagged command queueing for the Micropolis drive -
aic7xxx=tag_info:{{4}} - gives LOADS of timeout (I cannot currently paste
in, sorry), and a lot of set/reset loops, the system is not usable. On the
other hand, activating tagged command queueing for the IBM -
aic7xxx=tag_info:{{,0}} works just fine, even under heavy bus load.

My question: is the Micropolis tagged queueing failure in any way related to
* firmware bugs in the Micropolis drive?
* it being a wide drive on a narrow adaptor (I remember 5.0.18 negotiating
wide transfers in spite of that)?
* it not supporting linked commands?

Regards,
Matthias



Drive information follows.

-----------------------------------------------------------------------

(scsi0) <Adaptec AHA-284X SCSI host adapter> found at VLB slot 2
(scsi0) Narrow Channel, SCSI ID=6, 4/255 SCBs
(scsi0) BIOS enabled, IO Port 0x2c00, IRQ 11
(scsi0) IO Memory at 0x0, MMAP Memory at 0x0
(scsi0) Downloading sequencer code... 406 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.0.19/3.2.4
<Adaptec AHA-284X SCSI host adapter>



Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: MICROP Model: 4345WS Rev: x43h
Type: Direct-Access ANSI SCSI revision: 02

Inquiry command
---------------
Relative Address 0
Wide bus 32 0
Wide bus 16 1
Synchronous neg. 1
Linked Commands 0
Command Queueing 1

Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: IBM Model: DCAS-32160 Rev: S61A
Type: Direct-Access ANSI SCSI revision: 02

Inquiry command
---------------
Relative Address 0
Wide bus 32 0
Wide bus 16 0
Synchronous neg. 1
Linked Commands 1
Command Queueing 1

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