PROBLEM: ll_rw_block error with Optical Devices

Joerg Plate (plate@psyche.kn-bremen.de)
16 Feb 1999 12:46:22 +0100


[1.] ll_rw_block error with Optical Device
[2.] Full description of the problem/report:

I prepared a MODisk with "fdisk -b 2048 /dev/sdb" and
"mke2fs -b 2048 /dev/sdb1". After removing and inserting the disk I got
the following in "/var/log/syslog"

Feb 16 12:30:36 psyche modprobe: can't locate module block-major-22
Feb 16 12:30:36 psyche modprobe: can't locate module block-major-22
Feb 16 12:30:36 psyche kernel: Disc change detected.
Feb 16 12:30:36 psyche kernel: VFS: Disk change detected on device sd(8,16)
Feb 16 12:30:36 psyche kernel: SCSI device sdb: hdwr sector= 2048 bytes. Sectors= 310352 [606 MB] [0.6 GB]
Feb 16 12:30:36 psyche kernel: sdb: Write Protect is off
Feb 16 12:30:36 psyche kernel: sdb: sdb1
Feb 16 12:30:36 psyche kernel: ll_rw_block: device 08:10: only 2048-char blocks implemented (1024)

I don't understand the 22 (22 block Second IDE hard disk/CD-ROM interface)
sd(8,16) is /dev/sdb (major 8, minor 16)

[4.] Kernel version (from /proc/version):
Linux version 2.2.2 (root@psyche.kn-bremen.de) (gcc version pgcc-2.91.60 19981201 (egcs-1.1.1 release)) #2 Tue Feb 16 09:35:56 CET 1999

(I know that this is not the normal gcc, but I doubt that this is the problem)

[7.] Environment

[7.1.] Software (add the output of the ver_linux script here)

Linux psyche.kn-bremen.de 2.2.2 #2 Tue Feb 16 09:35:56 CET 1999 i586 unknown
Kernel modules 2.1.121
Gnu C 2.7.2.3
Binutils 2.9.1.0.19
Linux C Library 2.0.7
Dynamic linker ldd: version 1.9.10
Linux C++ Library 2.7.2
Procps 1.9.0
Mount 2.9g
Net-tools (1999-01-01)
Console-tools 1998.08.11
Sh-utils 1.16

fdisk 2.9.i
mke2fs 1.14, 9-Jan-1999 for EXT2 FS 0.5b, 95/08/09

[7.2.] Processor information (from /proc/cpuinfo):

processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 8
model name : AMD-K6(tm) 3D processor
stepping : unknown
cpu MHz : 300.688487
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 sep mmx 3dnow
bogomips : 599.65

[7.4.] SCSI information (from /proc/scsi/scsi)

Attached devices:
Host: scsi0 Channel: 00 Id: 06 Lun: 00
Vendor: IBM Model: DCAS-34330W Rev: S65A
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: FUJITSU Model: M2513E Rev: 0050
Type: Optical Device ANSI SCSI revision: 02

[7.5.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):

-- 
"I'm working on it."

"There should be more math. This could be mathier."

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