Problems reading recordable CDs with any CD-ROM drive
If you have successfully written a CD but have problems reading it, there are a number of possible
reasons:
• If the CD can be read on a CD-R or CD-RW drive but not on a standard CD-ROM drive, check in
the
Disc Info
and
Tools
to make sure that the session containing the data you just wrote is
closed
.
CD-ROM drives cannot read from a session that is not closed. If the CD session is not closed, close
the session.
• If your CD is not recognized, you receive an error message, or you have random problems accessing
files from your CD, your CD-ROM drive may not be calibrated to read recordable CDs.
• The CD can read fine, but all the files have a read only attribute. This occurs because the file system
extensions used to read back ISO 9660 discs in Windows assume that CDs are read-only medium, and
therefore set the read-only attribute for files on all CDs. If you copy the files from CD back to your hard
drive, this attribute is maintained until you change it using Windows Explorer.
Buffer Underruns
CD writing is a real time process, which must run constantly at the selected recording speed, without
interruptions. The
RipGO!
device buffer is constantly filled with a reserve of data waiting to be written,
so that small slowdowns or interruptions in the flow of data from the computer do not interrupt writing.
A buffer underrun error means that for some reason the flow of data from the source (e.g., hard drive,
CD-ROM drive) to the
RipGO!
device was interrupted long enough for the
RipGO!
device buffer to be
emptied, and writing was halted. If this occurs during an actual write operation, your recordable disc
may be ruined.
Enabling DMA operation of your source drive (either the CD-ROM or hard drive) may help to resolve the
buffer underrun error.
CAUTION!
The troubleshooting steps below walk you through enabling DMA (Direct Memory Access) on your
CD-ROM and hard drive, which may enhance your systems performance. However some older CD-ROMs
and hard drives cannot use this setting and problems could result.
Before enabling DMA on your system, check the documentation that came with your computer to see if
your hard drive and CD-ROM support DMA.
1. Right-click on
My Computer
on the Windows desktop and select
Properties
.
2. Click on the
Device Manager
tab.
3. Double-click on
CD-ROM
.
4. Double-click on the icon for your
source
CD-ROM.
5. Click on the
Settings
tab.
6. If the box next to the
DMA
setting does not already have a check mark in it, click on the box to
enable DMA.
7. Click on
OK
.
8. Double-click on the
Disk Drives
icon.
30
Device User’s Guide
Imation
