CD/DVDs Not Mounting But Drive is Recognized / SCSI Card Not Seen

Apologies for this mess in advance, but I thought it was worth seeing if anyone had an idea of what to try on either of these two issues from a system software perspective before I start breaking the computer apart and tinkering with hardware.
My G4 is the 733 MHz model which first shipped with the SuperDrive. That SuperDrive died years ago and I replaced it with an HP DVD Writer 300n which worked fine up until some version update of 10.4 though I can't recall the specific version. In any case, now the drive will not mount any CD or DVD that I insert, commercially-pressed or otherwise. The eject key on the keyboard functions properly, the tray opens and closes without problem and when a disc is inserted the activity light goes on and the disc spins for a minute and all seems normal, but the disc never appears on the desktop nor in any Finder window. The drive is still recognized in the System Profiler and I've double-checked the CD/DVD settings under System Preferences to verify that nothing is set to ignore there. I suppose it's possible the laser suddenly went bad, but as I said, the symptoms showed up following an update (though it was a while ago and at the time I had no need for a optical drive on this computer so I didn't address it then).
The second issue I discovered when I attached an external optical drive via the SCSI port I hadn't used in many years. That drive wasn't recognized at all and when I looked in the System Profiler the SCSI card isn't listed under PCI Cards. Is there a generic SCSI card driver I might be missing under OS X or will I need to open up the computer and determine which card I actually have in there?
Any suggestions would be appreciated and hopefully I've provided enough information to make that possible.

Hi K Roth, and a warm welcome to the forums!
I find Optical drives fairly short lived myself, but on the Internal, you might try PatchBurn...
http://www.patchburn.de/
Do you have another Mac with Firewire and a good optical drive?
If so you can boot the Other Mac into Target mode...
http://docs.info.apple.com/article.html?artnum=58583
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Hi All,
I am having difficulty mounting a USB drive on Solaris 10 x86 system with the following different unsuccessful attempts:
# uname -a
SunOS venus 5.10 Generic_139556-08 i86pc i386 i86pc
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Looking for devices...
     1. Volmgt Node: /vol/dev/aliases/cdrom0
        Logical Node: /dev/rdsk/c0t0d0s2
        Physical Node: /pci@0,0/pci-ide@4/ide@0/sd@0,0
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STATE STIME    FMRI
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total 0
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mount: I/O error
# mount -F pcfs /dev/rdsk/c4t0d0p0:c /mnt
mount: Block device required
# mount -F pcfs /dev/dsk/c4t0d0s2:c /mnt
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mount: Block device required
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# fsck /dev/rdsk/c4t0d0p0
Can't open /dev/rdsk/c4t0d0p0: I/O error
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Can't open /dev/rdsk/c4t0d0s2: I/O error
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Can't open /dev/rdsk/c4t0d0s2: I/O errorSecond try,
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# svcs volfs
STATE          STIME    FMRI
disabled       20:47:00 svc:/system/filesystem/volfs:default
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mount: I/O errorLast try,
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mkdir: Failed to make directory "/rmdisk"; File exists
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total 4
lrwxrwxrwx   1 root     nobody        16 Oct 1 2009 rmdisk0 -> ./unnamed_rmdik
drwxr-xr-x   2 root     nobody       512 Sep 30 2009 unnamed_rmdisk
# cd /rmdisk
# ls -lt
total 4
lrwxrwxrwx   1 root     nobody        16 Oct 1 2009 rmdisk0 -> ./unnamed_rmdik
drwxr-xr-x   2 root     nobody       512 Sep 30 2009 unnamed_rmdisk
# ls -lt unnamed_rmdisk
total 0
# ls -lt rmdisk0
lrwxrwxrwx   1 root     nobody        16 Oct 1 2009 rmdisk0 -> ./unnamed_rmdik
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Filesystem             size   used avail capacity Mounted on
/dev/dsk/c1t0d0s0      5.1G   4.0G   1.1G    78%    /
/devices                 0K     0K     0K     0%    /devices
ctfs                     0K     0K     0K     0%    /system/contract
proc                     0K     0K     0K     0%    /proc
mnttab                   0K     0K     0K     0%    /etc/mnttab
swap                   5.9G   984K   5.9G     1%    /etc/svc/volatile
objfs                    0K     0K     0K     0%    /system/object
sharefs                  0K     0K     0K     0%    /etc/dfs/sharetab
/usr/lib/libc/libc_hwcap2.so.1
                       5.1G   4.0G   1.1G    78%    /lib/libc.so.1
fd                       0K     0K     0K     0%    /dev/fd
swap                   5.9G   148K   5.9G     1%    /tmp
swap                   5.9G    32K   5.9G     1%    /var/run
/dev/dsk/c1t0d0s7      129G   1.7G   126G     2%    /export/home
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# svcs volfs
STATE          STIME    FMRI
disabled       21:02:31 svc:/system/filesystem/volfs:default
# pwd
/rmdisk
# cd /
# ls -lt /rmdisk
total 4
lrwxrwxrwx   1 root     nobody        16 Oct 1 2009 rmdisk0 -> ./unnamed_rmdik
drwxr-xr-x   2 root     nobody       512 Sep 30 2009 unnamed_rmdisk
# /etc/init.d/volmgt st
# svcs volfs
STATE          STIME    FMRI
disabled       21:02:31 svc:/system/filesystem/volfs:default
# /etc/init.d/volmgt start
volume management starting.
# svcs volfs
STATE          STIME    FMRI
online         21:04:44 svc:/system/filesystem/volfs:default
# svcs volfs
# mount | grep rmdisk
# pwd
# ls -lt /rmdisk
total 4
lrwxrwxrwx   1 root     nobody        16 Oct 1 2009 rmdisk0 -> ./unnamed_rmdik
drwxr-xr-x   2 root     nobody       512 Sep 30 2009 unnamed_rmdisk
# ls -lt /rmdisk/unnamed_rmdisk
total 0
# iostat -En
c0t0d0           Soft Errors: 3 Hard Errors: 0 Transport Errors: 0
Vendor: TEAC     Product: DV-28E-V         Revision: 1.AC Serial No:
Size: 0.00GB <0 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 3 Predictive Failure Analysis: 0
c1t0d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: HITACHI Product: HUS1514SBSUN146G Revision: SA04 Serial No: 0921B2Y3PC
Size: 146.81GB <146810535936 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t1d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: HITACHI Product: HUS1514SBSUN146G Revision: SA04 Serial No: 0921B2Z5NC
Size: 146.81GB <146810535936 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c4t0d0           Soft Errors: 21 Hard Errors: 0 Transport Errors: 0
Vendor: WD       Product: My Book 1140     Revision: 1007 Serial No:
Size: 2000.37GB <2000365289472 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 21 Predictive Failure Analysis: 0
#This is a working production system with 2 146.81GB mirrored hard disks. There is no disk error for either local or external 2TB Western Digital USB disks that works on Windows 7 or XP.
Any idea on what else to look for?
Thanks in advance,
Jack
Edited by: 797805 on 6/06/2012 04:48

Hi All,
Looks like it was a driver / incompatibility / unsupported issue since 2 other much smaller USB keys (Lexar USB Flash Drive – 32GB, SanDisk Cruzer Colors – 4GB) were successfully mounted automatically by volfs service as follows:
# df -h
Filesystem             size   used avail capacity Mounted on
/dev/dsk/c1t0d0s0      5.1G   4.0G   1.1G    78%    /
/dev/dsk/c1t0d0s7      129G   1.7G   126G     2%    /export/home
/vol/dev/dsk/c3t0d0/unnamed_rmdisk#1:c   3.7G   2.4G   1.3G    65%    /rmdisk/unnamed_rmdisk#1
/vol/dev/dsk/c2t0d0/unnamed_rmdisk:c    29G    96K    29G     1%    /rmdisk/unnamed_rmdiskIt also appears that the Device status of Not Ready from “iostat –En” below may not be correct either since both smaller drives are working fine:
# iostat -En
c4t0d0           Soft Errors: 23 Hard Errors: 0 Transport Errors: 0
Vendor: WD       Product: My Book 1140     Revision: 1007 Serial No:
Size: 2000.37GB <2000365289472 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 23 Predictive Failure Analysis: 0
c2t0d0           Soft Errors: 7 Hard Errors: 0 Transport Errors: 0
Vendor: Lexar    Product: USB Flash Drive Revision: 1100 Serial No:
Size: 31.41GB <31406948352 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 7 Predictive Failure Analysis: 0
c3t0d0           Soft Errors: 60 Hard Errors: 8 Transport Errors: 0
Vendor: SanDisk Product: Cruzer Colors+   Revision: 8.02 Serial No:
Size: 4.02GB <4022337024 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 8 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0In other word, the same question remains on whether it is possible to install a driver to overcome this issue and where to such driver?
It is necessary to install additional driver that came with the disk on Windows XP platform. However,
Thanks again,
Jack

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(49195)

CD/DVDs Not Mounting But Drive is Recognized / SCSI Card Not Seen

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