A Tale of Two SCSI CD ROMS

[Janina Sajka]

May I ask why you felt it necessary to send this post?

On Mon, 5 Mar 2001, Klarich, Terry wrote:

> Sorry, I can't help.  However, my experience with IBM stink pads has been
> nothing but problems.
>
> Terry
>
> -----Original Message-----
> From: Janina Sajka [mailto:janina at afb.net]
> Sent: Sunday, March 04, 2001 4:09 PM
> To: speakup at braille.uwo.ca; ma-linux at tux.org
> Subject: A Tale of Two SCSI CD ROMS
>
>
> And, it's a tale of woe! <grin>
>
> I am trying to figure out why one of my ide-scsi CD ROM devices works just
> like it should, while the second one doesn't.
>
> I suppose it could be something to do with the complexity of the hardware
> setup. This is an IBM Thinkpad T20 attached to
> an IBM docking station--at least it's attached when both devices are present
> together. The one CD ROM, and it's a CDRW,
> hence the ide-scsi, is on the Thinkpad itself in an IBM Ultrabay, as they
> call it. The second is in the dock, also in an
> ultrabay.
>
> I have no problems mounting the first, and no success at all mounting the
> second. In fact, when I try, I hard-hang the
> system so that I have to force power off--not even a ctrl-alt-del does the
> trick.
>
> The devices are definitely there. /proc/scsi/scsi reports:
>
>
> Attached devices:
> /Host: scsi0 Channel: 00 Id: 00 Lun: 00
>   Vendor: MATSHITA Model: UJDA310          Rev: 3.53
>   Type:   CD-ROM                           ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 01 Lun: 00
>   Vendor: TEAC     Model: CD-224E          Rev: 2.7B
>   Type:   CD-ROM                           ANSI SCSI revision: 02
> Host: scsi1 Channel: 00 Id: 06 Lun: 00
>   Vendor: CWS ORB2 Model: -SE U ID 6       Rev: D29
>
>
>
> I have /dev/scd0 and /dev/scd1. If I try, just for grins, mounting /dev/hde
> (the second device), I get a very polite error message suggesting that I
> should be using my ide-scsi.
>
> What I don't seem to have--and this is where I begin to lose my
> understanding of how this all works--is sr0 and sr1. These are referred to
> as the system boots--but they don't seem to be anywhere around:
>
> Mar  4 15:31:59 toccata kernel: Kernel command line: BOOT_IMAGE=current ro
> root=301 BOOT_FILE=/boot/vmlinuz-2.4.2 hdc=ide-scsi hde=ide-scsi
> Mar  4 15:31:59 toccata kernel: ide_setup: hdc=ide-scsi
> Mar  4 15:31:59 toccata kernel: ide_setup: hde=ide-scsi
> ...
> Mar  4 15:31:59 toccata kernel:     ide1: BM-DMA at 0x1c18-0x1c1f, BIOS
> settings: hdc:pio, hdd:pio
> Mar  4 15:31:59 toccata kernel: CMD648: IDE controller on PCI bus 08 dev 08
> Mar  4 15:31:59 toccata kernel: PCI: Found IRQ 11 for device 08:01.0
> Mar  4 15:31:59 toccata kernel: PCI: The same IRQ used for device 00:02.1
> Mar  4 15:31:59 toccata kernel: CMD648: chipset revision 1
> Mar  4 15:31:59 toccata kernel: CMD648: 100%% native mode on irq 11
> Mar  4 15:31:59 toccata kernel:     ide2: BM-DMA at 0x2000-0x2007, BIOS
> settings: hde:DMA, hdf:pio
> Mar  4 15:31:59 toccata kernel:     ide3: BM-DMA at 0x2008-0x200f, BIOS
> settings: hdg:pio, hdh:pio
> Mar  4 15:31:59 toccata kernel: hda: IBM-DJSA-220, ATA DISK drive
> Mar  4 15:31:59 toccata kernel: hdc: UJDA310, ATAPI CD/DVD-ROM drive
> Mar  4 15:31:59 toccata kernel: hde: CD-224E, ATAPI CD/DVD-ROM drive
> Mar  4 15:31:59 toccata kernel: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> Mar  4 15:31:59 toccata kernel: ide1 at 0x170-0x177,0x376 on irq 15
> Mar  4 15:31:59 toccata kernel: ide2 at 0x2020-0x2027,0x2016 on irq 11
> Mar  4 15:31:59 toccata kernel: hda: 39070080 sectors (20004 MB) w/1874KiB
> Cache, CHS=2584/240/63, UDMA(33)
> Mar  4 15:31:59 toccata kernel: Partition check:
> Mar  4 15:31:59 toccata kernel:  hda: hda1 hda2 hda3 hda4 < hda5 hda6 hda7
> hda8 hda9 hda10 >
> ...
> Mar  4 15:31:59 toccata kernel: SCSI subsystem driver Revision: 1.00
> Mar  4 15:31:59 toccata kernel: scsi0 : SCSI host adapter emulation for IDE
> ATAPI devices
> Mar  4 15:31:59 toccata kernel:   Vendor: MATSHITA  Model: UJDA310
> Rev: 3.53
> Mar  4 15:31:59 toccata kernel:   Type:   CD-ROM
> ANSI SCSI revision: 02
> Mar  4 15:31:59 toccata kernel:   Vendor: TEAC      Model: CD-224E
> Rev: 2.7B
> Mar  4 15:31:59 toccata kernel:   Type:   CD-ROM
> ANSI SCSI revision: 02
> Mar  4 15:31:59 toccata kernel: Detected scsi CD-ROM sr0 at scsi0, channel
> 0, id 0, lun 0
> Mar  4 15:31:59 toccata kernel: Detected scsi CD-ROM sr1 at scsi0, channel
> 0, id 1, lun 0
> Mar  4 15:31:59 toccata kernel: sr0: scsi3-mmc drive: 20x/20x writer cd/rw
> xa/form2 cdda tray
> Mar  4 15:31:59 toccata kernel: Uniform CD-ROM driver Revision: 3.12
> Mar  4 15:31:59 toccata kernel: sr1: scsi3-mmc drive: 24x/24x cd/rw xa/form2
> cdda tray
> ...
>
> I can't imagine the SR0 and SR1 device designations are meaningless--but I
> don't see them in /dev.
>
> Any advice most appreciated.
>
>
>

-- 

				Janina Sajka, Director
				Technology Research and Development
				Governmental Relations Group
				American Foundation for the Blind (AFB)

janina at afb.net
(202) 408-8175
http://www.afb.org/gov.html


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