The output for "ls -l /dev/cdrom is:
lrwxrwxrwx 1 root root 8 May 28 09:37 /dev/cdrom -> /dev/hdd

When mount using " mount -t iso9660 /dev/hdd /mnt/cdrom"
the output is :

mount: block device /dev/hdd is write-protected, mounting read-only
mount: Not a directory

make a new mount mount of your choice.
how about cheese
mkdir /mnt/cheese
mount -t iso9660 /dev/hdd /mnt/cheese

I had create mount cheese and tried " mount -t iso9660 /dev/hdd /mnt/cheese"

This is the output that I get:

mount: block device /dev/hdd is write-protected, mounting read-only
mount: Not a directory

if you wish,
you can try
mount -t iso9660 /dev/hdb /mnt/cdrom
mount -t iso9660 /dev/hdc /mnt/cdrom
mount -t iso9660 /dev/hdd /mnt/cdrom
mount -t iso9660 /dev/scd0 /mnt/cdrom

or post the output of dmesg
try a different cdrom disk

I had try out all the mount command but still unable to get mounted.

Here's the content of dmesg:

Linux version 2.4.20-8 (bhcompile@porky.devel.redhat.com) (gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)) #1 Thu Mar 13 17:54:28 EST 2003
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 0000000017ffd000 (usable)
BIOS-e820: 0000000017ffd000 - 0000000017fff000 (ACPI data)
BIOS-e820: 0000000017fff000 - 0000000018000000 (ACPI NVS)
BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
0MB HIGHMEM available.
383MB LOWMEM available.
On node 0 totalpages: 98301
zone(0): 4096 pages.
zone(1): 94205 pages.
zone(2): 0 pages.
Kernel command line: ro root=LABEL=/
Initializing CPU#0
Detected 451.031 MHz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 897.84 BogoMIPS
Memory: 382004k/393204k available (1347k kernel code, 8636k reserved, 999k data, 132k init, 0k highmem)
Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
Inode cache hash table entries: 32768 (order: 6, 262144 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer-cache hash table entries: 32768 (order: 5, 131072 bytes)
Page-cache hash table entries: 131072 (order: 7, 524288 bytes)
CPU: L1 I cache: 16K, L1 D cache: 16K
CPU: L2 cache: 512K
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU: After generic, caps: 0383fbff 00000000 00000000 00000000
CPU: Common caps: 0383fbff 00000000 00000000 00000000
CPU: Intel Pentium III (Katmai) stepping 02
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.40 (20010327) Richard Gooch (rgooch@atnf.csiro.au)
mtrr: detected mtrr type: Intel
PCI: PCI BIOS revision 2.10 entry at 0xf0730, last bus=2
PCI: Using configuration type 1
PCI: Probing PCI hardware
PCI: Using IRQ router PIIX [8086/7110] at 00:04.0
PCI: BIOS reporting unknown device 00:60
PCI: Device 00:61 not found by BIOS
Limiting direct PCI/PCI transfers.
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
apm: BIOS version 1.2 Flags 0x0b (Driver version 1.16)
Starting kswapd
VFS: Disk quotas vdquot_6.5.1
pty: 2048 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with MANY_PORTS MULTIPORT SHARE_IRQ SERIAL_PCI ISAPNP enabled
ttyS0 at 0x03f8 (irq = 4) is a 16550A
ttyS1 at 0x02f8 (irq = 3) is a 16550A
Real Time Clock Driver v1.10e
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
NET4: Frame Diverter 0.46
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
Uniform Multi-Platform E-IDE driver Revision: 7.00beta-2.4
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
PIIX4: IDE controller at PCI slot 00:04.1
PIIX4: chipset revision 1
PIIX4: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hdaMA, hdbMA
ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdcio, hddMA
hda: ST34312A, ATA DISK drive
hdb: MAXTOR 6L060J3, ATA DISK drive
blk: queue c03c9f40, I/O limit 4095Mb (mask 0xffffffff)
blk: queue c03ca084, I/O limit 4095Mb (mask 0xffffffff)
hdd: SAMSUNG CD-ROM SCR-3231, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: task_no_data_intr: status=0x51 { DriveReady SeekComplete Error }
hda: task_no_data_intr: error=0x04 { DriveStatusError }
hda: 8420832 sectors (4311 MB) w/512KiB Cache, CHS=524/255/63, UDMA(33)
hdb: host protected area => 1
hdb: 117266688 sectors (60041 MB) w/1819KiB Cache, CHS=7299/255/63, UDMA(33)
ide-floppy driver 0.99.newide
Partition check:
hda: hda1 hda2
hdb: hdb1 hdb2 hdb3 hdb4 < hdb5 >
ide-floppy driver 0.99.newide
md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 4096 buckets, 32Kbytes
TCP: Hash tables configured (established 32768 bind 65536)
Linux IP multicast router 0.06 plus PIM-SM
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
RAMDISK: Compressed image found at block 0
Freeing initrd memory: 269k freed
VFS: Mounted root (ext2 filesystem).
SCSI subsystem driver Revision: 1.00
PCI: Found IRQ 7 for device 00:06.0
PCI: Sharing IRQ 7 with 00:04.2
PCI: Sharing IRQ 7 with 00:09.0
PCI: Found IRQ 11 for device 00:0c.0
PCI: Sharing IRQ 11 with 00:0c.1
PCI: Found IRQ 11 for device 00:0c.1
PCI: Sharing IRQ 11 with 00:0c.0
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.8
<Adaptec aic7890/91 Ultra2 SCSI adapter>
aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs

scsi1 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.8
<Adaptec 3950B Ultra2 SCSI adapter>
aic7896/97: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs

scsi2 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.8
<Adaptec 3950B Ultra2 SCSI adapter>
aic7896/97: Ultra2 Wide Channel B, SCSI Id=7, 32/253 SCBs

blk: queue c1fa3814, I/O limit 4095Mb (mask 0xffffffff)
Journalled Block Device driver loaded
kjournald starting. Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
Freeing unused kernel memory: 132k freed
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
usb-uhci.c: $Revision: 1.275 $ time 17:59:01 Mar 13 2003
usb-uhci.c: High bandwidth mode enabled
PCI: Found IRQ 7 for device 00:04.2
PCI: Sharing IRQ 7 with 00:06.0
PCI: Sharing IRQ 7 with 00:09.0
usb-uhci.c: USB UHCI at I/O 0xd400, IRQ 7
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
usb-uhci.c: v1.275:USB Universal Host Controller Interface driver
usb.c: registered new driver hiddev
usb.c: registered new driver hid
hid-core.c: v1.8.1 Andreas Gal, Vojtech Pavlik <vojtech@suse.cz>
hid-core.c: USB HID support drivers
mice: PS/2 mouse device common for all mice
EXT3 FS 2.4-0.9.19, 19 August 2002 on ide0(3,67), internal journal
Adding Swap: 714852k swap-space (priority -1)
parport0: PC-style at 0x278 (0x678) [PCSPP,TRISTATE,EPP]
parport0: irq 5 detected
ip_tables: (C) 2000-2002 Netfilter core team
ip_conntrack version 2.1 (3071 buckets, 24568 max) - 292 bytes per conntrack
Linux Tulip driver version 0.9.15-pre12 (Aug 9, 2002)
PCI: Found IRQ 7 for device 00:09.0
PCI: Sharing IRQ 7 with 00:04.2
PCI: Sharing IRQ 7 with 00:06.0
tulip0: no phy info, aborting mtable build
divert: allocating divert_blk for eth0
eth0: Macronix 98715 PMAC rev 32 at 0xd8909000, 00:50:BA:01:C1:C0, IRQ 7.
parport0: PC-style at 0x278 (0x678) [PCSPP,TRISTATE,EPP]
parport0: irq 5 detected
lp0: using parport0 (polling).
lp0: console ready
Linux agpgart interface v0.99 (c) Jeff Hartmann
agpgart: Maximum main memory to use for agp memory: 321M
agpgart: Detected Intel 440BX chipset
agpgart: AGP aperture is 64M @ 0xe4000000
[drm] AGP 0.99 on Intel 440BX @ 0xe4000000 64MB
[drm] Initialized mga 3.0.2 20010321 on minor 0
mtrr: base(0xe2000000) is not aligned on a size(0x8000000) boundary
ide-floppy driver 0.99.newide
hdd: ATAPI 32X CD-ROM drive, 512kB Cache, DMA
Uniform CD-ROM driver Revision: 3.12
hdd: command error: status=0x51 { DriveReady SeekComplete Error }
hdd: command error: error=0x50
end_request: I/O error, dev 16:40 (hdd), sector 88
ISOFS: unable to read i-node block
Unable to identify CD-ROM format.
Unable to identify CD-ROM format.
Unable to identify CD-ROM format.
hdd: command error: status=0x51 { DriveReady SeekComplete Error }
hdd: command error: error=0x50
end_request: I/O error, dev 16:40 (hdd), sector 88
ISOFS: unable to read i-node block

if you are using grub, make sure for your cdrom having ide-scsi legacy emulation loaded
say, your drive is a primary slave, add this to the end of the boot line:

hdb=ide-scsi

for secondary master,

hdc=ide-scsi

etc.

the I/O error was caused by ide-scsi emulation not being loaded, most of the time.

now you should probably able to access the device in the /dev/scd0

now then try to mount the cd using

that should be fine now.

for lilo, i guess i can't shed my light on how to load the ide-scsi legacy emulation. ask around

aha, as i skim thru your dmesg ...

SAMSUNG CD-ROM SCR-3231, ATAPI CD/DVD-ROM drive

this drive needs old ide device modules to be loaded (if i remember correctly, i saw it somewhere...can't find the page tho)

do an insmod of the module (sorry i forgot which one again) but that's a starter for you to begin with

What's the function of insmod ?
I had tried most of the command available but get nothing.
How do I check whether the cdrom having ide-scsi lagacy emulation loaded or not?

lsmod lists the modules running.

it looks like your drive is having trouble with udma
hdparm -d0 /dev/hdd will turn it off

then try mounting
mount /dev/hdd /mnt/cdrom

I had tried " hdparm -d0 /dev/hdd" and this turn off the dma
I tried mount the cdrom and it works....

But I want to know, why turning off dma enable the cdrom to mount?
Another simple question, what is udma?
Thanks for the time looking on this threads.

udma is short for ultra direct memory access mode.
it's just a way to transfer data from the cdrom to
wherever. when you turn if off the drive is a little slower.

you could try a shorter or better ide cable to your cdrom,
and set it to master instead of slave. the drive is just
messing up the way it is set up. if there's another
drive on the cable with it, switch where they are attached.

<i>I had tried " hdparm -d0 /dev/hdd" and this turn off the dma
I tried mount the cdrom and it works....</i>

I seem to be having the same problem as you did, but this did not enable me to mount my cdrom. I'm running Suse 8.2 Professional, and the cdrom was working until it crapped out on Friday. I initially thought it was the cd I was using, which was a music cd that I had burned on a CDRW, but the regular cd's I have aren't working and neither is the data cd I tried. Initially I had problems getting sound out of the player but I switched to using XMMS which seemed to work. Now it won't read any cds at all. (I'm extremely new to Linux, but learning.) Please advise.

Please ignore my previous post. It turned out to be a bad cd rom. I got a new one from our IT guy and now I have no problems. Thanks anyway.