translation of log file on CDRW read failure?

[brachiator]

Can any UNIX savvy people help me comprehend what this means? I copied the below from my console.log -- I think that it is from the point where I loaded a CDRW with data files into my firewire CDRW, which for some reason doesn't either read or properly write CDRWs under X:

/System/Library/Filesystems/msdos.fs/Contents/Resources/../../msdos.util: device safe_read error @ 0, Invalid argument
/System/Library/Filesystems/msdos.fs/msdos.util: device safe_read error @ 0, Invalid argument
/System/Library/Filesystems/msdos.fs/msdos.util: device safe_read error @ 0, Invalid argument
/System/Library/Filesystems/msdos.fs/msdos.util: device safe_read error @ 0, Invalid argument
/System/Library/Filesystems/msdos.fs/msdos.util: device safe_read error @ 0, Invalid argument
/System/Library/Filesystems/msdos.fs/msdos.util: device safe_read error @ 0, Invalid argument
/System/Library/Filesystems/msdos.fs/msdos.util: device safe_read error @ 0, Input/output error
Nov 13 15:29:38 man-97-93 /sbin/autodiskmount[99]: disk2 ??? hfs no yes Untitled /Volumes/Untitled

FWIW, my system is:
Powerbook 333mhz Lombard ("bronze")
320RAM
4G HD
Keyspan Firewire Cardbus card
EZQuest BOA Firewire CDRW 16x10x40

Thanks!!!