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1 | Getting started quick | ||
2 | --------------------- | ||
3 | |||
4 | - Select packet support in the block device section and UDF support in | ||
5 | the file system section. | ||
6 | |||
7 | - Compile and install kernel and modules, reboot. | ||
8 | |||
9 | - You need the udftools package (pktsetup, mkudffs, cdrwtool). | ||
10 | Download from http://sourceforge.net/projects/linux-udf/ | ||
11 | |||
12 | - Grab a new CD-RW disc and format it (assuming CD-RW is hdc, substitute | ||
13 | as appropriate): | ||
14 | # cdrwtool -d /dev/hdc -q | ||
15 | |||
16 | - Setup your writer | ||
17 | # pktsetup dev_name /dev/hdc | ||
18 | |||
19 | - Now you can mount /dev/pktcdvd/dev_name and copy files to it. Enjoy! | ||
20 | # mount /dev/pktcdvd/dev_name /cdrom -t udf -o rw,noatime | ||
21 | |||
22 | |||
23 | Packet writing for DVD-RW media | ||
24 | ------------------------------- | ||
25 | |||
26 | DVD-RW discs can be written to much like CD-RW discs if they are in | ||
27 | the so called "restricted overwrite" mode. To put a disc in restricted | ||
28 | overwrite mode, run: | ||
29 | |||
30 | # dvd+rw-format /dev/hdc | ||
31 | |||
32 | You can then use the disc the same way you would use a CD-RW disc: | ||
33 | |||
34 | # pktsetup dev_name /dev/hdc | ||
35 | # mount /dev/pktcdvd/dev_name /cdrom -t udf -o rw,noatime | ||
36 | |||
37 | |||
38 | Packet writing for DVD+RW media | ||
39 | ------------------------------- | ||
40 | |||
41 | According to the DVD+RW specification, a drive supporting DVD+RW discs | ||
42 | shall implement "true random writes with 2KB granularity", which means | ||
43 | that it should be possible to put any filesystem with a block size >= | ||
44 | 2KB on such a disc. For example, it should be possible to do: | ||
45 | |||
46 | # dvd+rw-format /dev/hdc (only needed if the disc has never | ||
47 | been formatted) | ||
48 | # mkudffs /dev/hdc | ||
49 | # mount /dev/hdc /cdrom -t udf -o rw,noatime | ||
50 | |||
51 | However, some drives don't follow the specification and expect the | ||
52 | host to perform aligned writes at 32KB boundaries. Other drives do | ||
53 | follow the specification, but suffer bad performance problems if the | ||
54 | writes are not 32KB aligned. | ||
55 | |||
56 | Both problems can be solved by using the pktcdvd driver, which always | ||
57 | generates aligned writes. | ||
58 | |||
59 | # dvd+rw-format /dev/hdc | ||
60 | # pktsetup dev_name /dev/hdc | ||
61 | # mkudffs /dev/pktcdvd/dev_name | ||
62 | # mount /dev/pktcdvd/dev_name /cdrom -t udf -o rw,noatime | ||
63 | |||
64 | |||
65 | Packet writing for DVD-RAM media | ||
66 | -------------------------------- | ||
67 | |||
68 | DVD-RAM discs are random writable, so using the pktcdvd driver is not | ||
69 | necessary. However, using the pktcdvd driver can improve performance | ||
70 | in the same way it does for DVD+RW media. | ||
71 | |||
72 | |||
73 | Notes | ||
74 | ----- | ||
75 | |||
76 | - CD-RW media can usually not be overwritten more than about 1000 | ||
77 | times, so to avoid unnecessary wear on the media, you should always | ||
78 | use the noatime mount option. | ||
79 | |||
80 | - Defect management (ie automatic remapping of bad sectors) has not | ||
81 | been implemented yet, so you are likely to get at least some | ||
82 | filesystem corruption if the disc wears out. | ||
83 | |||
84 | - Since the pktcdvd driver makes the disc appear as a regular block | ||
85 | device with a 2KB block size, you can put any filesystem you like on | ||
86 | the disc. For example, run: | ||
87 | |||
88 | # /sbin/mke2fs /dev/pktcdvd/dev_name | ||
89 | |||
90 | to create an ext2 filesystem on the disc. | ||
91 | |||
92 | |||
93 | Links | ||
94 | ----- | ||
95 | |||
96 | See http://fy.chalmers.se/~appro/linux/DVD+RW/ for more information | ||
97 | about DVD writing. | ||