Hi Thomas, > > Drive type : vendor 'HP' product 'DVD-ROM 305' revision '1.01' > > No listing of profiles ? > (The GET CONFIGURATION command appears first in MMC-2 together > with the first mentioning of DVD. So a DVD drive should know it.) > > It's probably a Pioneer DVD-305 drive.
Yes, seems so. > cdrdao lists it as as exception from "MMC compliant" drives > needing the "plextor" driver and not "generic-mmc". > http://cdrdao.sourceforge.net/drives.html > > So it might really be too old for telling MMC profiles. > > > > http://h30499.www3.hp.com/t5/HP-9000/DVD-ROM-305-supports-which-types-of-DVD/td-p/3506773#.VAbTnESKnZ8 > > "I've had issues with the HP DVD-ROM reading CD-RW and CD-R discs." > > This might indicate a systematic problem or just be some > deterioration of an individual DVD drive. > > Because the drive is quite surely old old and possibly > worn-off, It's old, but most likely not worn-off. It's in a server, and in it's lifetime it won't have read many CDs. > it might be worth for Jawahar Panchal to try > different media. > DVD+RW or DVD-RW would be no waste. > CD-R would be wasteful but also give hope for better > physical readability than CD-RW. Jawahar, for me it did worked with a DVD+RW. > Helge: > Since you have a drive, you can make own read tests. Sure. > I have googled for LIF and HP booting. > (I actually operated storage devices with this no-hierarchy > filesystem of HP in the 1980s.) > http://www.hp9845.net/9845/projects/hpdir/ > > Your README confirms that the PALO boot block is indeed supposed > to bear the LIF magic number 0x80 0x00. Yes. > So if the firmware complains about the lack of this magic, > it is probably unable to read the first block with these two > bytes from the CD-RW. > This block is not used by mounting. This is what I get with the CD-RW inserted on Linux: root@lsXX:/mnt# xorriso -outdev /dev/sr0 -list_profiles xorriso 1.3.2 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Disc status unsuitable for writing Drive current: -outdev '/dev/sr0' Media current: is not recognizable Media status : is not recognizable Media summary: 1 session, 57583 data blocks, 112m data, 0 free Drive current: -outdev '/dev/sr0' Drive type : vendor 'HP' product 'DVD-ROM 305' revision '1.01' Mounting the CD-RW in Linux does work. > The first two bytes could just be inquired by: > > dd if=/dev/cdrom bs=2 count=1 | od -c > > which should yield > > 1+0 records in > 1+0 records out > 2 bytes (2 B) copied, 0.0105 s, 0.2 kB/s > 0000000 200 \0 > 0000002 > > If this does not yield "0000000 200 \0", then it should > report some i/o error. It is able to read the first block: root@lsXX:/mnt# dd if=/dev/cdrom bs=2 count=1 | od -c 1+0 records in 1+0 records out 2 bytes (2 B) copied, 0.004 s, 500 B/s 0000000 200 \0 0000002 So, maybe firmware just checks the "Media status" as above and then fails because it's not "recognizable" ? Helge -- To UNSUBSCRIBE, email to debian-hppa-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/trinity-a4cc65be-c0a2-4f5d-af9c-a6a1c2d377fb-1409741049591@3capp-gmx-bs40