Re: problem accessing the CD-Rom??

[Robert Vangel <vangelr@rfgt.net>]

Bruno Boettcher wrote:
> Hello!

Howdy!

> on my Laptop i have the problem, that i can't access the
> dvd-reader/writer....
>
> i put in  a tested dvd, try to mount it, and get:
> mount /dev/hdc /mnt
> mount: you must specify the filesystem type
>
> huh?

Try `-t auto'

Some CD/DVD's may be UDF.

Is the DVD blank or already written to? This wasn't specified (I assume 
written to, so just want to make sure it is).

> mount -t iso9660 /dev/hdc /mnt
> mount: /dev/hdc already mounted or /mnt busy

# mount

See what's already mounted. It may also be on /media/cdrom

> laptop:~# lsof /mnt
> laptop:~# 
> laptop:~# lsof /dev/hdc
> laptop:~# 
>
> ehm...

Try making a sub directory inside /mnt (like /mnt/cdrom) and try 
mounting it there. There may already be devices mounted inside of /mnt 
(lsof /mnt doesn't show anything because `/mnt' specifically isn't being 
accessed, but something inside is).

> strangely i see the drive in /proc/ide, on boot i get:
> Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> ide: Assuming 33MHz system bus speed for PIO modes; override with
> idebus=xx
> ICH5: IDE controller at PCI slot 0000:00:1f.1
> PCI: Enabling device 0000:00:1f.1 (0005 -> 0007)
> ACPI: PCI interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 193
> ICH5: chipset revision 2
> ICH5: not 100% native mode: will probe irqs later
> ide0: BM-DMA at 0x2060-0x2067, BIOS settings: hda:DMA, hdb:pio
> ide1: BM-DMA at 0x2068-0x206f, BIOS settings: hdc:DMA, hdd:pio
> hda: IC25N060ATMR04-0, ATA DISK drive
> Using anticipatory io scheduler
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> hda: max request size: 1024KiB
> hda: 117210240 sectors (60011 MB) w/7884KiB Cache, CHS=16383/255/63, UDMA(100)
>   /dev/ide/host0/bus0/target0/lun0: p1 p2 p3 < p5 p6 p7 >
> hdc: HL-DT-ST DVD-RW GWA-4040N, ATAPI CD/DVD-ROM drive
> ide1 at 0x170-0x177,0x376 on irq 15
>
> a grep on lsmod shows that the correct modules are loaded:
> ide_cd                 42656  0 
> cdrom                  40732  1 ide_cd
> ide_generic             1408  0 
> ide_disk               19296  6 
> ide_core              139940  4 ide_cd,ide_generic,piix,ide_disk
>
> just to be sure that no system like autofs etc are installed:
> laptop:~# ps aux |grep auto
> root     22117  0.0  0.0   1548   476 pts/5    S+   09:02   0:00 grep auto
> laptop:~# 
>
> i have discover installed though....
>
> i am at the end of my clues, don't know what is going wrong and how to
> fix this....
>
> any hint welcome!
>