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Date:      Mon, 13 Nov 1995 17:48:59 -0600 (CST)
From:      Jay Kuri <jaykuri@interaccess.com>
To:        freebsd-scsi@freebsd.org
Subject:   Help! My SCSI-2 CD rom is timing out
Message-ID:  <Pine.BSI.3.91.951113174518.4539C-100000@flowbee.interaccess.com>

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I originally posted to freebsd questions.  Someone suggested that I post 
it here.  Can anyone help?

I am using FreeBSD 2.0.5R and the aic scsi controller for an Adaptec 
2825 SCSI card. (the aic6360.c is actually from FreeBSD-stable in place 
of the one from 2.0.5R which seems to not recognize the 2825)  Other than 
that, the system is stock 2.0.5R.  I am using an external SCSI-2 CDRom 
drive (Mediavision RENO model).  When booting I see the following:

FreeBSD 2.0.5-RELEASE #0: Fri Nov 10 22:19:09  1995
[ misc deleted ]    
aic0 at 0x140-0x15f irq 11 on isa
aic0 waiting for scsi devices to settle
(aic0:1:0): "MEDIAVIS RENO CD-ROMX2A 2.04" type 5 removable SCSI 2
cd0(aic0:1:0): CD-ROM 
cd0(aic0:1:0): UNIT ATTENTION asc:28,0
cd0(aic0:1:0):  Not ready to ready transition, medium may have changed
cd present.[400000 x 2048 byte records]
npx0 on motherboard
npx0: INT 16 interface

  My SCSI-DELAY is set to 30 seconds.  However, what I am concerned about 
is when I try to mount a CD (an ISO-9660) using the command:
mount_cd9660 /dev/cd0a /cd
the CD starts to whirr, and after a few seconds I get the following message:

cd0(aic0:1:0): timed out

this repeats a few times and then (after a good minute or so, cd rom 
still whirring) I get:

cd0(aic0:1:0): MEDIUM ERROR asc:2,0 No seek complete

Only then am I returned to a shell prompt and the cd stop whirring.  
I've checked and rechecked termination, scsi-bus speed, etc and still am 
getting the same thing.  The hardware seems to be working, when I (uggh) 
boot to DOS I can mount the CDROM (same disk) and read it fine.  

I've been wrestling with the scsi subsystem in this beast for a week,  
can anyone offer any suggestions?  

Thanks in advance,

Jay K.



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