The Beaker wrote:
> I recently obtained an external SCSI CDROM drive that I've hooked up
> to my Sparc-II. The kernel sees it ok (I think) but when I mount it I get
> "Check Condition on CDB" error, the meaning of which I haven`t a clue. The 
> drive seems to mount ok otherwise, the FS is browsable, and 'umount' doesn't
> produce an errors. Any ideas whats going on here? I've included a script of
> a mount session plus a bit of 'dmesg' output.

 From my recollection of many years ago, some SCSI devices (at the time 
I was using an Epson GT-series SCSI scanner) flag Unit Attention after 
power-on reset. The SCSI driver I was writing detected this and 
automatically did a Check Condition, after which the device resets Unit 
Attention and works normally (so what you are observing is probably 
completely normal). My recollection may be a little inaccurate however, 
and I can't think of the reason for this device behaviour offhand.

T

> 
> Beaker
> 
> ---
> 
> Script started on Thu Aug 22 18:12:19 2002
> 
> beaker@sparc2: {1} mount -v -t cd9660 -r /dev/cd0a /cdrom
> exec: mount_cd9660 -o ro /dev/cd0a /cdrom
> /dev/cd0a on /cdrom type cd9660 (local, read-only, writes: sync 0 async 0)
> beaker@sparc2: {2} mount
> /dev/sd0a on / type ffs (local)
> /dev/sd0g on /usr type ffs (local)
> kernfs on /kern type kernfs (local)
> /dev/cd0a on /cdrom type cd9660 (local, read-only)
> beaker@sparc2: {3} umount /cdrom
> beaker@sparc2: {4} exit
> 
> Script done on Thu Aug 22 18:13:39 2002
> 
> ---
> 
> *** Selected output from dmesg ***
> 
> cd0 at scsibus0 target 5 lun 0: <COMPAQ, CD-ROM CR-503BCQ, 1.1c> SCSI2 5/cdrom removable
> 
> cd0(esp0:5:0):  Check Condition on CDB: 0x43 00 00 00 00 00 00 00 0c 40
> 
> ---
>