I've had this occur more than once. I mount a formatted dvd+rw and get these errors: # mount /mnt/cdrw Aug 21 21:09:13 tabatha kernel: pktcdvd: inserted media is DVD+RW Aug 21 21:09:13 tabatha kernel: pktcdvd: write speed 5540kB/s Aug 21 21:09:23 tabatha kernel: pktcdvd: 4590208kB available on disc Aug 21 21:10:23 tabatha kernel: ide-cd: cmd 0x28 timed out Aug 21 21:10:23 tabatha kernel: hda: DMA timeout retry Aug 21 21:10:23 tabatha kernel: hda: timeout waiting for DMA Aug 21 21:10:28 tabatha kernel: hda: status timeout: status=0xd0 { Busy } Aug 21 21:10:28 tabatha kernel: ide: failed opcode was: unknown Aug 21 21:10:28 tabatha kernel: hda: drive not ready for command Aug 21 21:10:28 tabatha kernel: hda: ATAPI reset complete Aug 21 21:11:31 tabatha kernel: ide-cd: cmd 0x28 timed out ... many retries later Aug 21 22:06:15 tabatha kernel: hda: ATAPI reset complete Aug 21 22:06:16 tabatha kernel: end_request: I/O error, dev hda, sector 1248 Aug 21 22:07:16 tabatha kernel: ide-cd: cmd 0x28 timed out Aug 21 22:07:16 tabatha kernel: hda: irq timeout: status=0xd0 { Busy } Aug 21 22:07:16 tabatha kernel: ide: failed opcode was: unknown Aug 21 22:07:16 tabatha kernel: hda: ATAPI reset complete Aug 21 22:08:18 tabatha kernel: ide-cd: cmd 0x28 timed out Aug 21 22:08:18 tabatha kernel: hda: irq timeout: status=0xd0 { Busy } Aug 21 22:08:18 tabatha kernel: ide: failed opcode was: unknown Aug 21 22:08:18 tabatha kernel: hda: ATAPI reset complete Aug 21 22:08:19 tabatha kernel: end_request: I/O error, dev hda, sector 1024 Aug 21 22:08:19 tabatha kernel: UDF-fs: No partition found (1) # mount exits After the mount command gets an error and exits I can try again and mount the dvd+rw without a problem (I didn't open the drive door) and diff all the files with no errors. Aug 21 22:17:08 tabatha kernel: pktcdvd: inserted media is DVD+RW Aug 21 22:17:08 tabatha kernel: pktcdvd: write speed 5540kB/s Aug 21 22:17:10 tabatha kernel: pktcdvd: 4590208kB available on disc Aug 21 22:17:13 tabatha kernel: UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2005/08/11 16:41 (1e5c) I've posted the whole log here: http://www.cosmicfires.com/packet-cd.log.html Linux kernel 2.6.12.5 SMP Info on drive and media: # dvd+rw-mediainfo /dev/hda INQUIRY: [LITE-ON ][DVDRW SOHW-1633S][BS0C] GET [CURRENT] CONFIGURATION: Mounted Media: 1Ah, DVD+RW Media ID: RICOHJPN/W11 Current Write Speed: 4.0x1385=5540KB/s Write Speed #0: 4.0x1385=5540KB/s GET [CURRENT] PERFORMANCE: Write Performance: 4.0x1385=5540KB/s@[0 -> 2295103] Speed Descriptor#0: 00/2295103 R@8.0x1385=11072KB/s W@4.0x1385=5540KB/s READ DVD STRUCTURE[#0h]: Media Book Type: 92h, DVD+RW book [revision 2] Legacy lead-out at: 2295104*2KB=4700372992 READ DISC INFORMATION: Disc status: complete Number of Sessions: 1 State of Last Session: complete Number of Tracks: 1 BG Format Status: suspended READ TRACK INFORMATION[#1]: Track State: complete Track Start Address: 0*2KB Free Blocks: 0*2KB Track Size: 2295104*2KB FABRICATED TOC: Track#1 : 14@0 Track#AA : 14@2295104 Multi-session Info: #1@0 READ CAPACITY: 2295104*2048=4700372992