cannot mount cdrom - not a newbie problem

[Haulmark, Chris]

Someone broke the silence: 

> i have a genuine problem here.
> i noticed my backup cdrw's had stopped working at some point. upon
> furthur investigation i find i cannot mount cd's full stop.
> 
> titan# mount -t cd9660 /dev/acd0c /mount
> cd9660: /dev/acd0c: Invalid argument
> 

Is this a typo of acd0c with the c?

Chris

> the above command makes the drive light flicker for 3 seconds
> then the
> error.
> 
> this is NOT a hardware problem. i get the exact same issue
> with my brand
> new dvd drive.
> 
> here is what dmesg gas to say:
> acd0: DVD-R <HL-DT-ST DVDRAM GSA-4160B> at ata1-slave WDMA2
> da0 at hpt3740 bus 0 target 0 lun 0
> da0: <HPT3xx RAID 1 Array 3.00> Fixed Direct Access SCSI-0 device
> da0: 190782MB (390721957 512 byte sectors: 255H 63S/T 24321C)
> Mounting root from ufs:/dev/da0s1a
> cd0 at ata1 bus 0 target 1 lun 0
> cd0: <HL-DT-ST DVDRAM GSA-4160B A301> Removable CD-ROM SCSI-0 device
> cd0: 16.000MB/s transfers cd0: cd present [1 x 2048 byte records]
> 
> note this was working perfectly.
> i suspect that some how my ata device has gone "bad" some how.
> 
> let me get the obvious replys out of the way:
> yes i have googled nothing i can find has even touched on a fix.
> yes there is a disc in the drive
> no it is not an audio disk.
> there is nothing else connected to the ide ports.
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