scsi cdrom mounting problem

[Denny White]

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>
> I was having the problem before upgrading from 5.4 to 5.5,
> and now, after the upgrade, the problem persists. Now and
> then, I can find a cd that'll mount, but most won't. Have
> tried the ones that won't mount on this obsd box with atapi
> instead of scsi & no problems. Googled around and searched
> the archives for the error messages, but didn't find anything
> to help so far. Read the man page on camcontrol and the warning
> about using it, so checking with the list before I do anything
> else. I did find one thing through google about the scsi delay
> sometimes needing to be increased, and I made that change in
> my kernconf before recompiling, but it didn't help. Tried
> booting with kernel.debug just to see what would happen, and
> it went smoothly, but this time there was no error message in
> dmesg, except that it said there was no medium present, which
> wasn't true. There was disk 1 of fbsd 5.5 install in the drive.
> When I try to mount a cd, I get `cd9660: /dev/cd: Input/output
> error' or sometimes, `device not configured'. Another thing that
> confuses me is, I thought in /dev, besides cd0, that there would
> be devices like on my obsd box, i.e., cd0a, cd0c, rcd0a, rcd0c,
> and so forth. The only cd entry in my fbsd /dev is cd0. I read
> some on MAKEDEV and saw that in fbsd 5, it's deprecated, replaced
> by devfs. I thought maybe somehow, from some of my earlier upgrades,
> that I had screwed up something with devices being created. Below
> is some info I've gotten that I hoped would help.
>
> (camcontrol's output)
> scbus0 on amr0 bus 0:
> scbus1 on amr0 bus 1:
> scbus2 on amr0 bus 2:
> scbus3 on ahc0 bus 0:
> <SEAGATE ST19171W SUN9.0G 0A7E>  at scbus3 target 0 lun 0 (da0,pass0)
> <TOSHIBA CD-ROM XM-5701TA 0787>  at scbus3 target 5 lun 0 (cd0,pass1)
> <  >                             at scbus3 target -1 lun -1 ()
> scbus-1 on xpt0 bus 0:
> <  >                             at scbus-1 target -1 lun -1 (xpt0)
>
>
> (from dmesg.yesterday)
> cd0 at ahc0 bus 0 target 5 lun 0
> cd0: <TOSHIBA CD-ROM XM-5701TA 0787> Removable CD-ROM SCSI-2 device cd0: 
> 10.000MB/s transfers (10.000MHz, offset 8)
> cd0: Attempt to query device size failed: NOT READY, Medium not present
>
> (from today's dmesg)
> cd0 at ahc0 bus 0 target 5 lun 0
> cd0: <TOSHIBA CD-ROM XM-5701TA 0787> Removable CD-ROM SCSI-2 device cd0: 
> 10.000MB/s transfers (10.000MHz, offset 8)
> cd0: cd present [296521 x 2048 byte records]
> (cd0:ahc0:0:5:0): READ(10). CDB: 28 0 0 0 0 0 0 0 1 0 (cd0:ahc0:0:5:0): CAM 
> Status: SCSI Status Error
> (cd0:ahc0:0:5:0): SCSI Status: Check Condition
> (cd0:ahc0:0:5:0): MEDIUM ERROR asc:15,0
> (cd0:ahc0:0:5:0): Random positioning error
> (cd0:ahc0:0:5:0): Retrying Command (per Sense Data)
>
> (had decreased this a long while back to 10000 to speedup boot, and
> increased it today after reading aforementioned in google)
> options   SCSI_DELAY=20000   # Delay (in ms) before probing SCSI
>
> kern.cam.cd.changer.min_busy_seconds: 5
> kern.cam.cd.changer.max_busy_seconds: 15
> kern.cam.cd.0.minimum_cmd_size: 6
> kern.disks: da0 cd0 amrd0
>         cdev    44    11K     11K       44  256
>  allocdirect     0     0K      3K       70  128
> debug.sizeof.cdev: 232
>
> I'm currently running FreeBSD 5.4 p2. Anyone replying please let
> me know if there's any other info I can provide that'll help.


Okay, my fat fingers have struck again. Sorry to all. Running
FreeBSD 5.5 p2.


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