Hi,
I have a usb compact flash card reader which I am reasonably sure is usb
mass storage compliant. I use Redhat 7.1 with no modifications (kernel
2.4.2-2). The compact flashcard being used is 32 M (Note one of the
kernel log messages suggest this is not being determined correctly:
Oct 15 09:06:17 localhost kernel: sda : block size assumed to be 512
bytes, disk size 1GB.)
1) Directly after booting up:
$ /sbin/lsmod
Module Size Used by
via82cxxx_audio 17552 0 (autoclean)
ac97_codec 8800 0 (autoclean) [via82cxxx_audio]
soundcore 4464 2 (autoclean) [via82cxxx_audio]
agpgart 23392 3 (autoclean)
NVdriver 820352 14 (autoclean)
autofs 11264 1 (autoclean)
ipchains 38976 0 (unused)
usb-uhci 20720 0 (unused)
usbcore 49664 1 [usb-uhci]
2) After plugging in USB card reader
The following modules added:
Module Size Used by
usb-storage 31792 0
scsi_mod 95104 1 [usb-storage]
The following lines are added to /var/log/messages:
Oct 15 09:01:44 localhost kernel: hub.c: USB new device connect on
bus1/1, assig
ned device number 3
Oct 15 09:01:44 localhost kernel: usb.c: USB device 3 (vend/prod
0x2098/0x2104)
is not claimed by any active driver.
Oct 15 09:01:44 localhost kernel: SCSI subsystem driver Revision: 1.00
Oct 15 09:01:44 localhost kernel: Initializing USB Mass Storage driver...
Oct 15 09:01:44 localhost kernel: usb.c: registered new driver usb-storage
Oct 15 09:01:44 localhost kernel: scsi0 : SCSI emulation for USB Mass
Storage de
vices
Oct 15 09:01:44 localhost kernel: usb-uhci.c: interrupt, status 3,
frame# 1085
Oct 15 09:01:44 localhost kernel: Vendor: General Model: Flash Disk
Drive R
ev: 2.05
Oct 15 09:01:44 localhost kernel: Type: Direct-Access
A
NSI SCSI revision: 02
Oct 15 09:01:44 localhost kernel: USB Mass Storage support registered.
And here is what /proc looks like
$ more /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: General Model: Flash Disk Drive Rev: 2.05
Type: Direct-Access ANSI SCSI revision: 02
$ more /proc/scsi/usb-storage-0/0
Host scsi0: usb-storage
Vendor: EZ
Product: USB Mass Storage Flash Card Rea
Serial Number: 9876543210ABCDEF
Protocol: Transparent SCSI
Transport: Bulk
GUID: 209821049876543210abcdef
Attached: 1
Things do not run as smoothly from here on.
$ mount -t vfat /dev/sda1 /mnt/flash/
mount: /dev/sda1 is not a valid block device
The following lines are added to /var/log/messages
Oct 15 09:06:17 localhost kernel: Attached scsi removable disk sda at
scsi0, channel 0, id 0, lun 0
Oct 15 09:06:17 localhost kernel: usb-uhci.c: interrupt, status 3,
frame# 1180
Oct 15 09:06:17 localhost kernel: usb-uhci.c: interrupt, status 3,
frame# 1194
Oct 15 09:06:17 localhost kernel: usb-uhci.c: interrupt, status 3,
frame# 1208
Oct 15 09:06:17 localhost kernel: sda : READ CAPACITY failed.
Oct 15 09:06:17 localhost kernel: sda : status = 1, message = 00, host =
0, driver = 08
Oct 15 09:06:17 localhost kernel: sda : extended sense code = 2
Oct 15 09:06:17 localhost kernel: sda : block size assumed to be 512
bytes, disk size 1GB.
Oct 15 09:06:17 localhost kernel: sda: I/O error: dev 08:00, sector 0
Oct 15 09:06:17 localhost kernel: unable to read partition table
Oct 15 09:06:17 localhost kernel: usb-uhci.c: interrupt, status 3,
frame# 1296
Oct 15 09:06:17 localhost kernel: usb-uhci.c: interrupt, status 3,
frame# 1310
Oct 15 09:06:17 localhost kernel: usb-uhci.c: interrupt, status 3,
frame# 1324
Oct 15 09:06:17 localhost kernel: sda : READ CAPACITY failed.
Oct 15 09:06:17 localhost kernel: sda : status = 1, message = 00, host =
0, driver = 08
Oct 15 09:06:17 localhost kernel: sda : extended sense code = 2
Oct 15 09:06:17 localhost kernel: sda : block size assumed to be 512
bytes, disk size 1GB.
Oct 15 09:06:17 localhost kernel: sda: Write Protect is off
Oct 15 09:06:17 localhost kernel: sda: I/O error: dev 08:00, sector 0
Oct 15 09:06:17 localhost kernel: unable to read partition table
Am I doing something wrong?
Is there any other information that would be useful?
Any help would be very much appreciated.
Thanks
Robert Valkenburg
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