On Sat, Sep 09 2000, adam@cfar.umd.edu wrote:
(EIDE CDRW drive) SMP Ok, I test on raw atapi and scsi on my test machine. Also SMP.
Hmm speaking of this, do I still need to use ide-scsi in order to use packet writing? AFAIK I do need to use it for cdrwite.
No, the packet writing patch adds write support to ide-cd as well.
[root@pepsi cd2]# cmp ~adam/ncd19r.tar.gz ncd19r.tar.gz /home/adam/ncd19r.tar.gz ncd19r.tar.gz differ: char 956417, line 2467
Same deal, corruption starts at the beginning of a new 2k sized buffer. Could you read the first 2048 bytes from the CD-ROM file and check that this buffer is zero? It is here, which means that a gather-block wasn't brought properly into memory before being written out.
I'm not sure I get it. This or other way here are bytes from beginning of file.
[root@pepsi cd2]# od -t x1 ncd19r.tar.gz | head -75 0000000 1f 8b 08 08 b8 0b c4 38 00 03 6e 63 64 31 39 72
Sorry, I wasn't being very clear. The corruption starts at byte 956417 according to your cmp above. So if you could dump 2048 bytes from the cdrom input file starting at 956416 and dump that, it would help a lot.
btw: is the 450mb of 650mb the penlaty I pay for using UDF over ISO9600 and for using RW instead of RO?
No, this appears to be a bug in cdrwtool when setting up the space. It does this on one of my drives too, I've noticed. You should be able to get around 550MB space on the disc. -- * Jens Axboe <axboe@suse.de> * SuSE Labs