ide/scsi cd-rom differences, ide ok, errors copying with scsi cd-rom

Richard Waltham (dormouse@farsrobt.demon.co.uk)
Sun, 29 Jun 1997 13:51:15 +0100 (BST)

Tried sending this a while ago but guess it got eaten by vger or some other
system on the way. Apologies if you've already seen this.

Looks to be several problems here.

While copying a CD-Rom with SCSI CD-Rom to SCSI disk got the following
errors and oops.

Copying the same cd with an ide cd-rom drive has no such problems. Appears
to be where file sizes are large. There is a note in the isofs file inode.c
about files greater than 16MBytes where the error messages are generated
and there are files on the cd up to 36MBytes.

Is this a problem with the scsi sd-rom driver incorrectly initialising
certain structures? There is obviously a difference between the structures
initialised by the atapi/ide driver and scsi driver otherwise these messages
wouldn't appear.

Similar errors are apparent with some other cd's I have again with large
files.

kernel 2.0.30, pre-patch 2.0.31-2 + Gerard Roudier's buffer patch. System has
64Mbytes dram which seems relevent to the kmalloc if it is trying to
allocate physical memory. SCSI CD drive is an old Toshiba 3301.

Warning: defective cdrom (volume sequence number). Enabling "cruft" mount option.
File unit size != 0 for ISO file (954846).
Interleaved files not (yet) supported.
File unit size != 0 for ISO file (934328).
File unit size != 0 for ISO file (934438).
File unit size != 0 for ISO file (1014204).
File unit size != 0 for ISO file (862672).
Interleaved files not (yet) supported.
File unit size != 0 for ISO file (870830).
File unit size != 0 for ISO file (860580).
File unit size != 0 for ISO file (813508).
kmalloc of too large a block (67702033 bytes).
Interleaved files not (yet) supported.

general protection: 0000
CPU: 0
EIP: 0010:[get_hash_table+52/172]
EFLAGS: 00010286
eax: aa93820c ebx: 03720b00 ecx: 037232f4 edx: 00000c83
esi: 00000b00 edi: 00034783 ebp: 00000400 esp: 0368fe3c
ds: 0018 es: 0018 fs: 002b gs: 002b ss: 0018
Process cp (pid: 155, process nr: 21, stackpage=0368f000)
Stack: 037232f4 00000b00 00034783 00000400 0368fe60 00000c83 00124893 00000b00
00034783 00000400 037232f4 00000400 00034783 03939dfc 00000001 00125058
00000b00 00034783 00000400 0191c000 001670f7 00000b00 00034783 00000400
Call Trace: [getblk+47/936] [bread+24/124] [isofs_find_entry+611/1276] [isofs_lookup+148/412] [dir_namei+193/308] [lookup+222/248] [_namei+91/196]
[namei+48/72] [sys_newstat+41/88] [system_call+82/128]
Code: 39 38 75 24 66 39 58 04 75 1e 39 68 20 74 22 56 e8 1f fa ff
Problem: block on freelist at 00087ed4 isn't free.
last message repeated 55 times
Problem: block on freelist at 02dd4190 isn't free.
Problem: block on freelist at 02dd4190 isn't free.
Problem: block on freelist at 02dd4190 isn't free.
Problem: block on freelist at 00087ed4 isn't free.
Problem: block on freelist at 02dd4190 isn't free.
Problem: block on freelist at 00087ed4 isn't free.

followed by at least a hundred more similar lines. Sytem is still running
but unusable as any further commands generated a block on freelist isn't
free message. Had to hard reset and reboot.

-- 
 Richard Waltham   |               Work: richard@digtalinterface.demon.co.uk
   At home in      |               Home:       dormouse@farsrobt.demon.co.uk
 Southampton UK    |                                  Compuserve 100421.1276