Messages in this thread | | | Date | Tue, 21 Mar 2000 17:33:58 -0800 (PST) | From | c o r e <> | Subject | ide-scsi problems with plextor IDE drive |
| |
I've been having some intermittent problems with a brand new plextor IDE CD-RW drive under linux. I haven't had any problems reading or writing to the drive under winDOS 95, nor have I had problems writing to the drive using cdrecord, but I've had tons of problems reading from the drive (e.g. mounting a CD). I'm accessing the drive via ide-scsi emulation.
I'm running 2.2.14 and have tried the latest IDE patch (ide20000124) to see if that would help, but I still have problems.
Here's what happens when I try to mount a CD:
[root@manteador ~]$ mount -t iso9660 -o ro /dev/scd0 /mnt/cdrom mount: wrong fs type, bad option, bad superblock on /dev/scd0, or too many mounted file systems [root@manteador ~]$
Relevant errors from 'dmesg' caused by the mount attempt:
scsi0 : SCSI host adapter emulation for IDE ATAPI devices scsi : 1 host. Vendor: PLEXTOR Model: CD-R PX-W8432T Rev: 1.05 Type: CD-ROM ANSI SCSI revision: 02 Detected scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0 sr0: scsi3-mmc drive: 32x/32x writer cd/rw xa/form2 cdda tray Uniform CDROM driver Revision: 2.56 VFS: Disk change detected on device sr(11,0) ide-scsi: The scsi wants to send us more data than expected - discarding data ide-scsi: The scsi wants to send us more data than expected - discarding data ide-scsi: The scsi wants to send us more data than expected - discarding data ide-scsi: The scsi wants to send us more data than expected - discarding data <these errors repeat a total of 84 times> Unable to identify CD-ROM format.
/etc/conf.modules relevant contents:
# kernel 2.2.x ATAPI SCSI emulation options ide-cd ignore=hdc # if /dev/hdc is your CD-writer post-install sr_mod /sbin/modprobe ide-scsi # auto probe module alias scd0 sr_mod # load sr_mod upon access of scd0 alias scsi_hostadaptor ide-scsi # SCSI host adaptor emulation
I need some assistance in determining if this is a hardware problem or a linux problem so that I can RMA the drive or linux ;-)
If I try to mount the CD using straight ATAPI mode it works just fine (i.e. /dev/hdc without scsi modules).
Now oddly that I've re-enabled the ide-scsi modules, I can mount cdroms with no problem. This doesn't always work.
Perhaps I should enable verbose scsi error reporting... I'll wait to hear back from you fine folks first. Please CC me on replies since I'm not subscribed. Tx!
-core
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |