SCSI timeouts when booting with Adaptec 1542CF/Seagate ST31230N

SCSI timeouts when booting with Adaptec 1542CF/Seagate ST31230N

Post by Eric J. Hanse » Fri, 14 Jul 1995 04:00:00



Hiya...

I'm trying to install Linux 1.2.1 (from Slackware) for the first time
and (a) I've read through much on-line and Yggdrasil documentation,
(b) I've swapped out all my other boards to rule out possible HW
conflicts.  Despite these things, I *cannot* get my PC (Pentium 90mhz)
to boot from 3.5 floppy and successfully access my 1.0g SCSI HD
(which I plan to install all of Linux onto).

I can boot fine under DOS/Windows - these OS/software are on a Connor
IDE HD (C:), and from there, I can even access the SCSI drive (via
the Adaptec 1542CF controller plugged into an ISA slot).  When
I try booting from the Slackware 'boot' disk, however, it recognizes
the Adaptec and Seagate, but then gives me ever-repeating **timeout**
errors while trying to access the Seagate (ID 0) HD.  There's nothing
on the Seagate right now (no partitions at all), so I can't figure
the problem.

Linux SCSI-howto documentation states that this controller (1542CF)
is "extremely sensitive" to cables/termination, but I've already
confirmed that it works fine under DOS.  Is there something perhaps
that DOS does to access the drive (maybe changing a 1542CF parameter
via software) that Linux does *not* do (and the hardware config on
the board is incorrect)???

Anyone help/suggestions?

Thanks *very* much in advance,
Eric Hansen


 
 
 

SCSI timeouts when booting with Adaptec 1542CF/Seagate ST31230N

Post by Andreas Dilg » Tue, 18 Jul 1995 04:00:00




Quote:>I'm trying to install Linux 1.2.1 (from Slackware) for the first time
>and (a) I've read through much on-line and Yggdrasil documentation,
>(b) I've swapped out all my other boards to rule out possible HW
>conflicts.  Despite these things, I *cannot* get my PC (Pentium 90mhz)
>to boot from 3.5 floppy and successfully access my 1.0g SCSI HD

>I can boot fine under DOS/Windows - these OS/software are on a Connor
>IDE HD (C:), and from there, I can even access the SCSI drive (via
>the Adaptec 1542CF controller plugged into an ISA slot).  When
>I try booting from the Slackware 'boot' disk, however, it recognizes
>the Adaptec and Seagate, but then gives me ever-repeating **timeout**
>errors while trying to access the Seagate (ID 0) HD.  There's nothing
>on the Seagate right now (no partitions at all), so I can't figure
>the problem.

This is a problem which I, and others have had previously.  It is fixed
by going into the Adaptec configuration at startup and enabling sync
negotiation for the SCSI HD.  I had the problem with an IBM 1 GB drive,
and all the other reports I saw also had drives > 1GB.

Cheers, Andreas
--
Andreas Dilger    University of Calgary   \ "If a man ate a pound of pasta and
(403) 220-8792    Micronet Research Group  \  a pound of antipasto, would they
Dept of Electrical & Computer Engineering   \    cancel out, leaving him still
<http://www-mddsp.enel.ucalgary.ca/People/adilger/>        hungry?" -- Dogbert

 
 
 

1. SCSI bus timeouts with adaptec 1542cf

i have an adaptec 1542cf attached to a single 2gig internal
micropolis scsi disk.  the host adapter is terminated with
a microswitch.  the disk comes terminated by default; it
is configured with jumpers.

i have built a filesystem on the disk successfully.  however,
e2fsck /dev/sda1 completes successfully, then the machine goes
into a loop of bus timeouts and the machine becomes unusable.
it is not locked up, just really  slow.

after recompiling aha1542.c with debugging turned on, i get
the following messages in a loop:

aha1542_queuecommand: dev 0 cmd 0a pos 8722 len 9216
aha1542_queuecommand: dumping scsi cmd: 0a 00 00 24 10 00
scsi host 0 abort (pid 3116) timed out resetting

also, this debug message seemed interesting:
1/o error dev:08:01 sector 4

i was able to successfully verify the disk media using the
utility on the 1542's bios.  i am running 2.0.27 on a 486/dx2 66.

any ideas how to address the timeouts?

-russ

--
Russell D. McManus             phone: 212-357-4901
Goldman, Sachs & Co.            beep: 917-556-0708
Intl. Equities Technology

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