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On Sat, December 17, 2005 15:19, gigi wrote: |
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> par contre je n'avais pas validé le packet writing au niveau du noyau et |
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> pourtant j'arrive à copier et supprimer sur un DVD que j'avais déjà au |
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> format UDF !! |
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> comprend pas . |
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|
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Avec un DVD+RW c'est possible sans activer le packet writing. Il y a des |
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graveurs qui le refusent, d'autres qui l'acceptent plus ou moins bien. |
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|
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Extrait de la doc /usr/src/linux/Documentation/cdrom/packet-writing.txt |
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### |
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Packet writing for DVD+RW media |
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------------------------------- |
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|
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According to the DVD+RW specification, a drive supporting DVD+RW discs |
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shall implement "true random writes with 2KB granularity", which means |
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that it should be possible to put any filesystem with a block size >= |
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2KB on such a disc. For example, it should be possible to do: |
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|
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# mkudffs /dev/hdc |
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# mount /dev/hdc /cdrom -t udf -o rw,noatime |
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|
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However, some drives don't follow the specification and expect the |
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host to perform aligned writes at 32KB boundaries. Other drives does |
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follow the specification, but suffer bad performance problems if the |
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writes are not 32KB aligned. |
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|
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Both problems can be solved by using the pktcdvd driver, which always |
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generates aligned writes. |
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|
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# pktsetup /dev/pktcdvd0 /dev/hdc |
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# mkudffs /dev/pktcdvd0 |
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# mount /dev/pktcdvd0 /cdrom -t udf -o rw,noatime |
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### |
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|
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-- |
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Laurent Jourden-Courtain |
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Encrypted and Signed correspondence preferred |
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OpenPGP Public Key ID: 0xE0D96090 |
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Key Fingerprint : 1145 79CC 4668 897F 5D82 5BB6 A15C DE7E E0D9 6090 |
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http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0xE0D96090 |
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-- |
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