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| author | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-11-22 12:06:44 -0600 |
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| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-11-22 12:06:44 -0600 |
| commit | 0bd2af46839ad6262d25714a6ec0365db9d6b98f (patch) | |
| tree | dcced72d230d69fd0c5816ac6dd03ab84799a93e /Documentation/filesystems/udf.txt | |
| parent | e138a5d2356729b8752e88520cc1525fae9794ac (diff) | |
| parent | f26b90440cd74c78fe10c9bd5160809704a9627c (diff) | |
| download | kernel_samsung_smdk4412-0bd2af46839ad6262d25714a6ec0365db9d6b98f.zip kernel_samsung_smdk4412-0bd2af46839ad6262d25714a6ec0365db9d6b98f.tar.gz kernel_samsung_smdk4412-0bd2af46839ad6262d25714a6ec0365db9d6b98f.tar.bz2 | |
Merge ../scsi-rc-fixes-2.6
Diffstat (limited to 'Documentation/filesystems/udf.txt')
| -rw-r--r-- | Documentation/filesystems/udf.txt | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/Documentation/filesystems/udf.txt b/Documentation/filesystems/udf.txt index 511b423..fde829a 100644 --- a/Documentation/filesystems/udf.txt +++ b/Documentation/filesystems/udf.txt @@ -7,8 +7,17 @@ If you encounter problems with reading UDF discs using this driver, please report them to linux_udf@hpesjro.fc.hp.com, which is the developer's list. -Write support requires a block driver which supports writing. The current -scsi and ide cdrom drivers do not support writing. +Write support requires a block driver which supports writing. Currently +dvd+rw drives and media support true random sector writes, and so a udf +filesystem on such devices can be directly mounted read/write. CD-RW +media however, does not support this. Instead the media can be formatted +for packet mode using the utility cdrwtool, then the pktcdvd driver can +be bound to the underlying cd device to provide the required buffering +and read-modify-write cycles to allow the filesystem random sector writes +while providing the hardware with only full packet writes. While not +required for dvd+rw media, use of the pktcdvd driver often enhances +performance due to very poor read-modify-write support supplied internally +by drive firmware. ------------------------------------------------------------------------------- The following mount options are supported: |