Messages in this thread | | | Date | Sun, 14 Jun 1998 10:52:32 -0700 | From | "Leonard N. Zubkoff" <> | Subject | Re: Tagged cmnd queueing trouble in aic7xxx 5.0.19 |
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From: Matthias Andree <mandree@dosis.uni-dortmund.de> Date: Sun, 14 Jun 1998 13:23:14 +0200 (CEST)
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's a Micropolis. Firmware bugs in the tagged queuing implementation was one of their specialities. They were also especially competent at firmware bugs where the drive became wedged so badly that only a power cycle would recover.
* it being a wide drive on a narrow adaptor (I remember 5.0.18 negotiating wide transfers in spite of that)?
Unlikely.
* it not supporting linked commands?
No. Nothing must really uses linked commands any more.
Leonard
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