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SubjectAsus CD-S520/A kernel I/O error
From
Something's wrong on the kernels ide/atapi interface for cd-rom's.  I
got a Asus CD-S520/A and it seems that I can't sweep from the beginning
to the end of the CD without getting a sense error. Commands like:

dd if=/dev/scd0 of=/file.iso
dd if=/dev/hdc of=/file.iso

give

---

Jun 28 19:28:33 deneb kernel: I/O error: dev 0b:00, sector 1159912
Jun 28 19:28:33 deneb kernel: I/O error: dev 0b:00, sector 1160064

(note)
the sectors do change if I change de medium, but on the same medium the
falty sectores are always the same. All the cd's are in top conditions
without a scratch and clean.

---

(with and without the scsi emulation) are pointless. On my former HP
9100c cdr/rw writer and Phillips 40x reader this didn't happen. What is
also curious is that original brand cd's (like a game or the maxim's cd
data catalog) is red 100% by this Asus cd reader. I thought is as not
an error with the interface but with cdrecord but after testing a cd
burned with nero (windows os) the same happened. If I change brands the
same happens too (tested TDK and Sony).

As a final note it seems that when mounted the cd can be accessed
perfectly (or so it seems).

I would write a patch/workaround myself but it seems that I can't
understand this behaviour.

Hoping that this report was useful.. best regards, Marco Ferra.

--- Debian GNU/Linux 3.0r1 ---

My configuration:

Motherboard: ASUS CUV4X

cat /proc/version
Linux version 2.4.18 (root@deneb) (gcc version 2.95.4 20011002 (Debian
prerelease)) #1 Mon Jun 23 00:27:00 WEST 2003

cat /proc/version
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 3
cpu MHz : 701.626
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca
cmov pat pse36 mmx fxsr sse
bogomips : 1399.19

cat /proc/modules
ipt_state 576 2
ipt_mac 640 0 (unused)
ipt_limit 960 0 (unused)
ipt_LOG 3072 0 (unused)
ip_conntrack_irc 2400 0 (unused)
ip_conntrack_ftp 3136 0 (unused)
ip_conntrack 12884 3 [ipt_state ip_conntrack_irc
ip_conntrack_ftp]
mga 102480 1
agpgart 12448 3

(note: scsi emulation is directly on the kernel image)

cat /proc/ioports

0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
02f8-02ff : serial(set)
0376-0376 : ide1
0378-037a : parport0
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(set)
0cf8-0cff : PCI conf1
b400-b43f : Ensoniq ES1371 [AudioPCI-97]
b400-b43f : es1371
b800-b8ff : Realtek Semiconductor Co., Ltd. RTL-8139
b800-b8ff : 8139too
d000-d01f : VIA Technologies, Inc. UHCI USB (#2)
d000-d01f : usb-uhci
d400-d41f : VIA Technologies, Inc. UHCI USB
d400-d41f : usb-uhci
d800-d80f : VIA Technologies, Inc. Bus Master IDE
d800-d807 : ide0
d808-d80f : ide1
e400-e4ff : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
e800-e80f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]

cat /proc/iomem
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-13febfff : System RAM
00100000-002343e9 : Kernel code
002343ea-00292b77 : Kernel data
13fec000-13feefff : ACPI Tables
13fef000-13ffefff : reserved
13fff000-13ffffff : ACPI Non-volatile Storage
f8000000-f80000ff : Realtek Semiconductor Co., Ltd. RTL-8139
f8000000-f80000ff : 8139too
f8800000-f9efffff : PCI Bus #01
f8800000-f8ffffff : Matrox Graphics, Inc. MGA G400 AGP
f9000000-f9003fff : Matrox Graphics, Inc. MGA G400 AGP
f9f00000-fbffffff : PCI Bus #01
fa000000-fbffffff : Matrox Graphics, Inc. MGA G400 AGP
fc000000-fdffffff : VIA Technologies, Inc. VT8605 [ProSavage PM133]
ffff0000-ffffffff : reserved

cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: ASUS Model: CD-S520/A Rev: 2.0K
Type: CD-ROM ANSI SCSI revision: 02
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