Problem: /dev/hdc cannot be read or written to when the drive contains
DVD-RAM media. The behavior is the same for the stock 2.4.3 kernel
and the SuSE-2.4.0 kernel. Strangely enough, the disk can be read,
but not written to, with the 2.2.18 kernel.
Diagnostics:
(1) The hardware is properly connected: mounting CD-ROMs and the SuSE-7.1
DVD-ROM works.
(2) The drive is recognized at boot time (2.4.3 kernel):
from "/var/log/boot.msg":
<4>ide_setup: idebus=33
<4>ide_setup: ide0=dma
<4>ide_setup: ide0=ata66
<4>ide: Assuming 33MHz system bus speed for PIO modes
<4>AMD7409: IDE controller on PCI bus 00 dev 39
<4>AMD7409: chipset revision 7
<4>AMD7409: not 100%% native mode: will probe irqs later
<4>AMD7409: ATA-66/100 forced bit set (WARNING)!!
<4> ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:pio
<4> ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:DMA, hdd:pio
<4>hda: IBM-DTLA-307030, ATA DISK drive
<4>hdc: TOSHIBA DVD-RAM SD-W2002, ATAPI CD/DVD-ROM drive
<4>ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
<4>ide1 at 0x170-0x177,0x376 on irq 15
<6>hda: 60036480 sectors (30739 MB) w/1916KiB Cache, CHS=3737/255/63, UDMA(66)
<4>hdc: ATAPI 24X DVD-ROM DVDAM drive, 8192kB Cache, DMA
<6>Uniform CD-ROM driver Revision: 3.12
# cat /proc/sys/dev/cdrom/info
CD-ROM information, Id: cdrom.c 3.12 2000/10/18
drive name: hdc
drive speed: 0
drive # of slots: 1
Can close tray: 1
Can open tray: 1
Can lock tray: 1
Can change speed: 1
Can select disk: 0
Can read multisession: 1
Can read MCN: 1
Reports media changed: 1
Can play audio: 1
Can write CD-R: 0
Can write CD-RW: 0
Can read DVD: 1
Can write DVD-R: 0
Can write DVD-RAM: 1
# cat /proc/ide/hdc/settings
name value min max mode
---- ----- --- --- ----
breada_readahead 4 0 127 rw
current_speed 34 0 69 rw
dsc_overlap 0 0 1 rw
file_readahead 0 0 2097151 rw
ide_scsi 0 0 1 rw
init_speed 34 0 69 rw
io_32bit 0 0 3 rw
keepsettings 0 0 1 rw
max_kb_per_request 127 1 127 rw
nice1 1 0 1 rw
number 2 0 3 rw
pio_mode write-only 0 255 w
slow 0 0 1 rw
unmaskirq 0 0 1 rw
using_dma 1 0 1 rw
(3) the DVD-RAM medium cannot be read from or written to:
# dd if=/dev/hdc of=/dev/null bs=2048 count=8
0+0 records in
0+0 records out
# dd if=/dev/null of=/dev/hdc bs=2048 count=8
0+0 records in
0+0 records out
# fdisk /dev/hdc
Unable to read /dev/hdc
# badblocks /dev/hdc
0
1
2
3
4
...
# mke2fs -v -b 2048 -m 0 /dev/hdc
mke2fs 1.19, 13-Jul-2000 for EXT2 FS 0.5b, 95/08/09
/dev/hdc: Memory allocation failed while setting up superblock
# mkudf --media-type=dvdram --blocksize=2048 /dev/hdc
7200 (CEST)/-120
mkudf: min blocks=1762
(Just to make sure, I tried 2 different DVD-RAM media.)
______________________________________________________________________________
I am somewhat clueless what to do next.
Are there any experiences with this or other IDE DVD-RAM drives?
Stefan J.
-- Stefan R. Jaschke <stefan@jaschke-net.de> http://www.jaschke-net.de - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/