Date: Wed, 21 Jun 1995 10:20:37 -0400 From: moto@CS.cmu.edu To: hackers@freebsd.org Subject: weird problem with AHA2490+EXABYTE Message-ID: <9688.803744437@GS81.SP.CS.CMU.EDU>
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Hello,
I'm having a problem with a EXABYTE 8205XL and AHA2940. Here is the
configuration:
OS: FreeBSD 2.0.5 (GENERIC kernel with CHILD_MAX=128 and pty=32)
(AHC_TAGENABLE is NOT defined)
CPU: Pentium 100MHz (GATEWAY2000 P5-100)
Memory: 32M
SCSI: Adaptec 2940
Disk: Micropolis 3221 (2.0G) (external)
CD: Toshiba XM3501 (external)
Tape: EXABYTE 8205XL (external)
Without the EXABYTE, it just runs fine. When the EXABYTE is attached,
the machine reports bunch of "timeout on sd0" during dumping the
filesystem to a tape. I suspected the cable and termination, but both
were OK (I'm using active terminator and chaging a cable didn't help
either. I dettached Toshiba's CD-ROM, but I still had the same
problem, therefore the length of a cable is not a problem, I guess).
I tried to play the transfer rate of AHA2940. It slightly change the
behavior but didn't solve the problem completely.
The same tape unit is working just fine with anohter machine:
OS: FreeBSD 2.0.5 (GENERIC)
CPU: 486DX2 50MHz (GATEWAY2000)
Memory: 16M
SCSI: Adaptec 1542B
Disk: Micropolis 2210 (1.0G) (external)
CD: Toshiba XM3401 (internal)
Tape: EXABYTE 8205XL (external)
So the tape unit itself is OK.
>From this observation, there might a possibility that there is a
problem in EXABYTE and AHA-2940 combination. Does anyone experience
this problem? Any suggestion will be greatly appreciated!
==============================================================================
Motonori Shindou Carnegie Mellon University SCS Graduate Student
e-mail: moto@cs.cmu.edu, NiftyServe: GEG04056
WWW: http://www.cs.cmu.edu/afs/cs.cmu.edu/user/moto/WWW/moto-home.html
TEL: 412-362-9636 FAX: 412-362-9634
==============================================================================
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