We've had a problem occur when writing to DVD+Rs and DVD-Rs using
growisofs on Redhat Enterprise Linux 5.0. What we’re trying to do is backup audit data that we've stored, which is basically one
.zip file for each day's worth of audit data. The
.zip files are relatively small, generally only a few megabytes each. We receive the following error message from
growisofs when writing to a DVD+R or DVD-R:
:-( unable to pread64(2) primary volume descriptor: Input/output error you most likely want to use -Z option.
growisofs also exits with an exit code of 150. According to a Debian mailing list post I read (link no longer working)
errno+128, so this appears to correspond with
errno=22, which is
EINVAL (Invalid argument).
The primary volume descriptor is definitely there as we have already initialized the DVD with
-Z. The first thing we do is
growisofs -Z, followed by one
growisofs -M command per file. The error usually happens on the second file we write--i.e., the DVD is initialized with
-Z, we write one
.zip file successfully, and then the second
.zip file yields this error message.
A simple workaround is to physically eject the DVD and then re-insert it at which point the DVD works again and we are able to write the rest of the files. That's less than ideal, though. The error is not consistent but it is quite frequent and ejecting seems to always fix the problem.
Here are the commands we use to write to the DVD:
growisofs -Z /dev/dvd -rJ -use-the-force-luke=notray blank.iso for each FILE: growisofs -M /dev/dvd -rJ -use-the-force-luke=notray "$FILE"
Here's sample output from
dvd+rw-mediainfo /dev/dvd, if it helps:
INQUIRY: [TEAC ][DV-W28EC ][1.0B] GET [CURRENT] CONFIGURATION: Mounted Media: 1Bh, DVD+R Media ID: RITEK/F16 Current Write Speed: 8.0x1385=11080KB/s Write Speed #0: 8.0x1385=11080KB/s Write Speed #1: 6.0x1385=8310KB/s Write Speed #2: 4.0x1385=5540KB/s Write Speed #3: 2.4x1385=3324KB/s Speed Descriptor#0: 00/2295103 R@8.0x1385=11080KB/s W@8.0x1385=11080KB/s Speed Descriptor#1: 00/2295103 R@6.0x1385=8310KB/s W@6.0x1385=8310KB/s Speed Descriptor#2: 00/2295103 R@4.0x1385=5540KB/s W@4.0x1385=5540KB/s Speed Descriptor#3: 00/2295103 R@2.4x1385=3324KB/s W@2.4x1385=3324KB/s READ DVD STRUCTURE[#0h]: Media Book Type: 00h, DVD-ROM book [revision 0] Legacy lead-out at: 2295104*2KB=4700372992 READ DISC INFORMATION: Disc status: appendable Number of Sessions: 21 State of Last Session: empty "Next" Track: 21 Number of Tracks: 21
Any ideas on what is causing this problem or how to fix it?