Hi,
I've got an external cd-rom drive branded a "Microtech MicroCD" that I'm
having trouble getting to work with Linux 2.6.3 (the only version I've
tried it with). The drive attaches to a USB port on the host machine
through a cable that, at the drive end, has what looks like a "VHDCI"
high-density SCSI connector but is only about half the size.
usbview reports the drive as a "eUSB ATA/ATAPI adapter" manufactured by
"SCM Microsystems Inc." (vendor/product/rev = 04e6/0101/2.00). Some
searching on Google revealed that SCM Microsystems manufactured a
USB-ATAPI bridge cable that has been used to attach various ATAPI drives
to USB ports, in particular the HP 8200e/8210e CD-Writer Plus.
I suppose that's what I've got: a parallel-port ATAPI drive that's been
retrofitted to work with USB ports.
Anyway...
When I plug in the drive, the usb subsystem loads a bunch of stuff and
sets the drive up on /dev/sda with the following being put in
/var/log/messages
--- begin /var/log/messages ---
Feb 26 19:44:45 localhost kernel: usb 1-1: new full speed USB device using address 3
Feb 26 19:44:45 localhost kernel: SCSI subsystem initialized
Feb 26 19:44:45 localhost kernel: Initializing USB Mass Storage driver...
Feb 26 19:44:45 localhost kernel: scsi0 : SCSI emulation for USB Mass Storage devices
Feb 26 19:44:45 localhost kernel: Vendor: Model: Rev:
Feb 26 19:44:45 localhost kernel: Type: Direct-Access ANSI
SCSI revision: 02
Feb 26 19:44:45 localhost kernel: drivers/usb/core/usb.c: registered new driver
usb-storage
Feb 26 19:44:45 localhost kernel: USB Mass Storage support registered.
Feb 26 19:44:45 localhost scsi.agent[4486]: disk at
/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1:1.0/host0/0:0:0:0
Feb 26 19:44:45 localhost kernel: sda : sector size 0 reported, assuming 512.
Feb 26 19:44:45 localhost kernel: SCSI device sda: 1 512-byte hdwr sectors (0 MB)
Feb 26 19:44:45 localhost kernel: sda:<7>usb-storage: queuecommand called
Feb 26 19:44:45 localhost kernel: unknown partition table
Feb 26 19:44:45 localhost kernel: Attached scsi disk sda at scsi0, channel 0, id 0,
lun 0
--- end /var/log/messages ---
If I place a disk in the drive, when I try to mount it the attempt fails
with the following being placed in /var/log/messages:
--- begin /var/log/messages ---
Feb 26 19:46:58 localhost kernel: attempt to access beyond end of device
Feb 26 19:46:58 localhost kernel: sda: rw=0, want=66, limit=1
Feb 26 19:46:58 localhost kernel: isofs_fill_super: bread failed, dev=sda,
iso_blknum=16, block=32
--- end /var/log/messages ---
Does somewhat have some idea how to get this drive working? Thanks.
-Kipp
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