Added a wiki page about xorriso on qemu. Online: wiki/QemuXorriso
This commit is contained in:
parent
8ebbc825b0
commit
3340ef84db
510
doc/qemu_xorriso.wiki
Normal file
510
doc/qemu_xorriso.wiki
Normal file
@ -0,0 +1,510 @@
|
|||||||
|
|
||||||
|
This text describes how to set up a qemu virtual machine so that xorriso
|
||||||
|
on its guest GNU/Linux can operate a CD, DVD or BD recorder of the host
|
||||||
|
system.
|
||||||
|
|
||||||
|
The options follow proposals of Paolo Bonzini on qemu-devel mailing list.
|
||||||
|
My compliments for his patient guidance.
|
||||||
|
|
||||||
|
This worked with a qemu git clone which was made few days before the
|
||||||
|
release candidate v1.0-rc0 was tagged.
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
qemu start command :
|
||||||
|
|
||||||
|
{{{
|
||||||
|
$ qemu \
|
||||||
|
-enable-kvm \
|
||||||
|
-nographic \
|
||||||
|
-m 512 \
|
||||||
|
-net nic,model=ne2k_pci \
|
||||||
|
-net user,hostfwd=tcp::5557-:22 \
|
||||||
|
-hda /dvdbuffer/i386-install.qemu \
|
||||||
|
-drive file=/dev/sr2,if=none,id=scsicd \
|
||||||
|
-device virtio-blk,drive=scsicd,logical_block_size=2048,physical_block_size=2048 \
|
||||||
|
-cdrom .../some_image.iso
|
||||||
|
}}}
|
||||||
|
|
||||||
|
With this setup of -drive and -device it is necessary to have a readable
|
||||||
|
medium in the drive, when qemu gets started. Else it will refuse to start
|
||||||
|
with a message about missing medium or with an i/o error if the medium
|
||||||
|
is blank.
|
||||||
|
|
||||||
|
The guest system is accessible via ssh and scp at port 5557 of the
|
||||||
|
host system.
|
||||||
|
|
||||||
|
'''/dev/sr2''' is the address of the DVD drive which is handed over to the
|
||||||
|
guest system.
|
||||||
|
|
||||||
|
'''.../some_image.iso''' may be any readable file which shall serve as
|
||||||
|
virtual DVD-ROM. qemu is not happy without such a thing.
|
||||||
|
|
||||||
|
'''/dvdbuffer/i386-install.qemu''' is the disk image, where the guest operating
|
||||||
|
system was installed.
|
||||||
|
{{{
|
||||||
|
$ qemu-img create /dvdbuffer/i386-install.qemu 8G
|
||||||
|
$ qemu \
|
||||||
|
-enable-kvm \
|
||||||
|
-m 512 \
|
||||||
|
-net nic,model=ne2k_pci \
|
||||||
|
-hda /dvdbuffer/i386-install.qemu \
|
||||||
|
-cdrom debian-6.0.3-i386-netinst.iso \
|
||||||
|
-boot d
|
||||||
|
}}}
|
||||||
|
|
||||||
|
Host system of my test is Debian GNU/Linux 6.0.2 amd64,
|
||||||
|
which had access to the Internet when the guest was installed.
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
Preparations on guest system Debian GNU/Linux 6.0.3 i386
|
||||||
|
|
||||||
|
There appears no /dev/sr for the passthrough drive. Since libburn
|
||||||
|
on Linux currently insists in finding a /dev/sr which points to the
|
||||||
|
drive, there is need for an udev rule.
|
||||||
|
|
||||||
|
/lib/udev/rules.d/50-udev-default.rules:
|
||||||
|
{{{
|
||||||
|
KERNEL=="vda", SYMLINK+="sr1"
|
||||||
|
}}}
|
||||||
|
|
||||||
|
libburn on Linux needs rw-permission for the drive's device node.
|
||||||
|
The virtual device /dev/vda is in group "disk". Usual for CD drives is
|
||||||
|
group "cdrom", to which i (or the Debian installer ?) have added my
|
||||||
|
normal user when i installed the guest system.
|
||||||
|
|
||||||
|
In /lib/udev/rules.d/91-permissions.rules:
|
||||||
|
{{{
|
||||||
|
KERNEL=="vda", GROUP="cdrom"
|
||||||
|
}}}
|
||||||
|
|
||||||
|
This should yield
|
||||||
|
{{{
|
||||||
|
lrwxrwxrwx 1 root root 3 Nov 8 11:19 /dev/sr1 -> vda
|
||||||
|
brw-rw---- 1 root cdrom 254, 0 Nov 8 11:19 /dev/vda
|
||||||
|
}}}
|
||||||
|
|
||||||
|
Beginning with libburnia release 1.1.8, the tests will also be
|
||||||
|
possible with dynamically linked xorriso which comes with libisoburn
|
||||||
|
and needs installed libburn and libisofs. That's what packages of
|
||||||
|
Debian and other distros deliver.
|
||||||
|
|
||||||
|
For now, one needs GNU xorriso from a recent development tarball
|
||||||
|
{{{
|
||||||
|
http://scdbackup.sourceforge.net/xorriso-1.1.7.tar.gz
|
||||||
|
}}}
|
||||||
|
Do
|
||||||
|
{{{
|
||||||
|
$ tar xzf xorriso-1.1.7.tar.gz
|
||||||
|
$ cd xorriso-1.1.7
|
||||||
|
$ ./configure && make
|
||||||
|
}}}
|
||||||
|
Either do as superuser
|
||||||
|
{{{
|
||||||
|
# make install
|
||||||
|
}}}
|
||||||
|
or execute it where it was built as
|
||||||
|
{{{
|
||||||
|
$ ./xorriso/xorriso ...arguments...
|
||||||
|
}}}
|
||||||
|
After compilation, this binary does not depend on files in the build
|
||||||
|
directory. You may move it to any other location.
|
||||||
|
|
||||||
|
The version must be >= 1.1.7, Version timestamp >= 2011.11.09.111414
|
||||||
|
{{{
|
||||||
|
$ xorriso -version
|
||||||
|
}}}
|
||||||
|
tells the versions of its components on stdout:
|
||||||
|
{{{
|
||||||
|
...
|
||||||
|
xorriso version : 1.1.7
|
||||||
|
Version timestamp : 2011.11.09.111414
|
||||||
|
...
|
||||||
|
}}}
|
||||||
|
|
||||||
|
For details about the following xorriso commands, read
|
||||||
|
{{{
|
||||||
|
man xorriso
|
||||||
|
man ./xorriso/xorriso.1
|
||||||
|
}}}
|
||||||
|
or with the same content
|
||||||
|
{{{
|
||||||
|
info xorriso
|
||||||
|
info ./xorriso/xorriso.info
|
||||||
|
}}}
|
||||||
|
Or read the [http://scdbackup.sourceforge.net/man_1_xorriso_devel.html online man page of xorriso].
|
||||||
|
|
||||||
|
|
||||||
|
Note that the sequence of xorriso arguments matters. They are commands
|
||||||
|
which get performed one after the other.
|
||||||
|
This differs from the behavior of mkisofs, cdrecord, et.al.,
|
||||||
|
which parse all arguments and then perform actions in a hardcoded
|
||||||
|
sequence.
|
||||||
|
|
||||||
|
Writing happens automatically if ISO filetree changes are pending
|
||||||
|
at the end of the program run. This is like with other burn tools.
|
||||||
|
(There is a command -commit for intermediate writing e.g. in dialog
|
||||||
|
mode.)
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
Listing accessible drives:
|
||||||
|
{{{
|
||||||
|
$ xorriso -devices
|
||||||
|
}}}
|
||||||
|
shows on stdout:
|
||||||
|
{{{
|
||||||
|
0 -dev '/dev/sr0' rwrw-- : 'QEMU ' 'QEMU DVD-ROM'
|
||||||
|
1 -dev '/dev/sr1' rwrw-- : 'Optiarc ' 'BD RW BD-5300S'
|
||||||
|
}}}
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
The burn tests are presented here for unformatted DVD-RW media.
|
||||||
|
The xorriso commands apply also to other types of optical media.
|
||||||
|
See "Other applicable media types:" further below.
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
Inspecting drive and medium:
|
||||||
|
{{{
|
||||||
|
$ xorriso -outdev /dev/sr1 -toc
|
||||||
|
}}}
|
||||||
|
should show on stdout something like
|
||||||
|
{{{
|
||||||
|
Drive current: -dev '/dev/sr1'
|
||||||
|
Drive type : vendor 'Optiarc' product 'BD RW BD-5300S' revision '1.04'
|
||||||
|
Media current: DVD-RW sequential recording
|
||||||
|
Media product: RITEKW04 , Ritek Corp
|
||||||
|
Media status : is written , is closed
|
||||||
|
Media blocks : 306592 readable , 0 writable , 2298496 overall
|
||||||
|
TOC layout : Idx , sbsector , Size , Volume Id
|
||||||
|
ISO session : 1 , 0 , 106696s , ISOIMAGE
|
||||||
|
ISO session : 2 , 135536 , 108385s , ISOIMAGE
|
||||||
|
ISO session : 3 , 250240 , 56202s , ISOIMAGE
|
||||||
|
Media summary: 3 sessions, 271744 data blocks, 531m data, 0 free
|
||||||
|
}}}
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
Blanking to single session capability:
|
||||||
|
|
||||||
|
This medium has to be blanked before further writing. For the DAO
|
||||||
|
test, one can save time by fast blanking, which xorriso normally
|
||||||
|
dislikes because the result is not capable of multi-session:
|
||||||
|
{{{
|
||||||
|
$ xorriso -outdev /dev/sr1 -blank deformat_quickest
|
||||||
|
}}}
|
||||||
|
should report on stderr
|
||||||
|
{{{
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Blanking ( 1.0% done in 2 seconds )
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Blanking ( 95.4% done in 36 seconds )
|
||||||
|
xorriso : UPDATE : Blanking ( 99.0% done in 37 seconds )
|
||||||
|
...
|
||||||
|
Media current: DVD-RW sequential recording
|
||||||
|
Media status : is blank
|
||||||
|
Media summary: 0 sessions, 0 data blocks, 0 data, 4489m free
|
||||||
|
}}}
|
||||||
|
Do not worry if the pacifier messages show no neat percentage progress.
|
||||||
|
Some drives report "1.0%" until they are done. Some report "1.0%"
|
||||||
|
after "99%".
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
Writing a DAO session:
|
||||||
|
|
||||||
|
Use one or more moderately sized directories as input. Here: /usr/bin.
|
||||||
|
Terminate the list of -add arguments by argument "--".
|
||||||
|
It is important to have command -close "on" among the arguments.
|
||||||
|
{{{
|
||||||
|
$ xorriso -md5 on -outdev /dev/sr1 -close on -add /usr/bin --
|
||||||
|
}}}
|
||||||
|
should report on stderr
|
||||||
|
{{{
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : 594 files added in 1 seconds
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Thank you for being patient. Working since 2 seconds.
|
||||||
|
xorriso : UPDATE : Writing: 32s 0.1% fifo 100% buf 0% 0.1xD
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Writing: 2704s 5.1% fifo 11% buf 0% 3.9xD
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Writing: 20208s 38.2% fifo 52% buf 99% 4.0xD
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Writing: 52885s 100.0% fifo 0% buf 99% 0.0xD
|
||||||
|
ISO image produced: 52735 sectors
|
||||||
|
Written to media : 52885 sectors at LBA 0
|
||||||
|
Writing to '/dev/sr1' completed successfully.
|
||||||
|
}}}
|
||||||
|
Do not worry if there is no progress to see for a few dozen seconds
|
||||||
|
at the beginning.
|
||||||
|
The run will last at least as long as writing of 1 GB would need.
|
||||||
|
If you write less data, then there will be a lot of zero progress
|
||||||
|
messages at the end of writing.
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
Checkreading the result:
|
||||||
|
{{{
|
||||||
|
$ xorriso -md5 on -indev /dev/sr1 -check_md5_r sorry / --
|
||||||
|
}}}
|
||||||
|
The word "sorry" sets the severity of the event message, which is
|
||||||
|
emitted in case of MD5 mismatch. "sorry" will continue the checkreading
|
||||||
|
after mismatch, "failure" or "fatal" will end the xorriso run.
|
||||||
|
All three will cause a non-zero exit value of xorriso if a mismatch
|
||||||
|
occured.
|
||||||
|
|
||||||
|
This should report on stderr
|
||||||
|
{{{
|
||||||
|
...
|
||||||
|
Drive current: -indev '/dev/sr1'
|
||||||
|
Media current: DVD-RW sequential recording
|
||||||
|
Media status : is written , is closed
|
||||||
|
Media summary: 1 session, 52885 data blocks, 103m data, 0 free
|
||||||
|
Volume id : 'ISOIMAGE'
|
||||||
|
xorriso : UPDATE : 568079 content bytes read in 5 seconds
|
||||||
|
xorriso : UPDATE : 17074k content bytes read in 10 seconds
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : 103.7m content bytes read in 35 seconds
|
||||||
|
File contents and their MD5 checksums match.
|
||||||
|
}}}
|
||||||
|
and the exit value should be 0, if no mismatch was reported.
|
||||||
|
|
||||||
|
A mismatch message would look like
|
||||||
|
{{{
|
||||||
|
...
|
||||||
|
MD5 MISMATCH: '/usr/bin/ncursesw5-config'
|
||||||
|
...
|
||||||
|
Mismatch detected between file contents and MD5 checksums.
|
||||||
|
xorriso : SORRY : Event triggered by MD5 comparison mismatch
|
||||||
|
xorriso : NOTE : Tolerated problem event of severity 'SORRY'
|
||||||
|
xorriso : NOTE : -return_with SORRY 32 triggered by problem severity SORRY
|
||||||
|
}}}
|
||||||
|
and the exit value should be non-zero.
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
Blanking to multi-session capability:
|
||||||
|
{{{
|
||||||
|
$ xorriso -outdev /dev/sr1 -blank as_needed
|
||||||
|
}}}
|
||||||
|
This will need as long as writing the DVD-RW up to its end.
|
||||||
|
Blanking option "as_neede" lets xorriso decide what to do in order
|
||||||
|
to make the medium type writable from scratch.
|
||||||
|
|
||||||
|
The report on stderr should end by
|
||||||
|
{{{
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Blanking ( 98.9% done in 902 seconds )
|
||||||
|
xorriso : UPDATE : Blanking ( 99.0% done in 903 seconds )
|
||||||
|
xorriso : UPDATE : Blanking ( 99.0% done in 904 seconds )
|
||||||
|
Blanking done
|
||||||
|
xorriso : NOTE : Re-assessing -outdev '/dev/sr1'
|
||||||
|
Drive current: -outdev '/dev/sr1'
|
||||||
|
Media current: DVD-RW sequential recording
|
||||||
|
Media status : is blank
|
||||||
|
Media summary: 0 sessions, 0 data blocks, 0 data, 4489m free
|
||||||
|
}}}
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
Writing multiple sessions (DVD-R write type Incremental):
|
||||||
|
|
||||||
|
This time do not perform command -close "on", so that the medium
|
||||||
|
stays writable:
|
||||||
|
{{{
|
||||||
|
$ xorriso -md5 on -dev /dev/sr1 -add /usr/lib --
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Writing: 105280s 98.6% fifo 0% buf 77% 3.5xD
|
||||||
|
xorriso : UPDATE : Writing: 106796s 100.0% fifo 0% buf 62% 2.2xD
|
||||||
|
xorriso : UPDATE : Closing track/session. Working since 44 seconds
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Closing track/session. Working since 77 seconds
|
||||||
|
ISO image produced: 106646 sectors
|
||||||
|
Written to media : 106800 sectors at LBA 0
|
||||||
|
Writing to '/dev/sr1' completed successfully.
|
||||||
|
}}}
|
||||||
|
Checkread like after the DAO test:
|
||||||
|
{{{
|
||||||
|
$ xorriso -md5 on -indev /dev/sr1 -check_md5_r sorry / --
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : 204.0m content bytes read in 63 seconds
|
||||||
|
File contents and their MD5 checksums match.
|
||||||
|
}}}
|
||||||
|
Writing the second session looks like the first one. Just use another
|
||||||
|
set of input files to get a visible change in the ISO 9660 file tree:
|
||||||
|
{{{
|
||||||
|
$ xorriso -md5 on -dev /dev/sr1 -add /usr/bin --
|
||||||
|
...
|
||||||
|
Written to media : 53408 sectors at LBA 135488
|
||||||
|
Writing to '/dev/sr1' completed successfully.
|
||||||
|
}}}
|
||||||
|
And checkread the whole tree of files (i.e. both sessions):
|
||||||
|
{{{
|
||||||
|
$ xorriso -md5 on -indev /dev/sr1 -check_md5_r sorry / --
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : 307.8m content bytes read in 89 seconds
|
||||||
|
File contents and their MD5 checksums match.
|
||||||
|
}}}
|
||||||
|
At the end of writing a final session, the medium can be closed.
|
||||||
|
It will not take more writing unless it gets blanked or formatted.
|
||||||
|
So use command -close "on" to demand closing after writing.
|
||||||
|
{{{
|
||||||
|
$ xorriso -md5 on -dev /dev/sr1 -close on -add /usr/sbin --
|
||||||
|
...
|
||||||
|
Written to media : 16160 sectors at LBA 195056
|
||||||
|
Writing to '/dev/sr1' completed successfully.
|
||||||
|
}}}
|
||||||
|
Checkread
|
||||||
|
{{{
|
||||||
|
$ xorriso -md5 on -indev /dev/sr1 -check_md5_r sorry / --
|
||||||
|
...
|
||||||
|
Media current: DVD-RW sequential recording
|
||||||
|
Media status : is written , is closed
|
||||||
|
Media summary: 3 sessions, 176368 data blocks, 344m data, 4064m free
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : 337.7m content bytes read in 97 seconds
|
||||||
|
File contents and their MD5 checksums match.
|
||||||
|
}}}
|
||||||
|
|
||||||
|
-----------------------------------------------------------------------------
|
||||||
|
|
||||||
|
If the drive tray can move by itself, you may now eject the medium:
|
||||||
|
{{{
|
||||||
|
$ xorriso -outdev /dev/sr1 -eject all
|
||||||
|
}}}
|
||||||
|
|
||||||
|
-----------------------------------------------------------------------------
|
||||||
|
|
||||||
|
Other applicable media types:
|
||||||
|
|
||||||
|
These test runs for sequential DVD-RW may be performed on CD-RW with the
|
||||||
|
same xorriso arguments. Be aware that /usr/lib will hardly fit on a CD.
|
||||||
|
So choose smaller directories for CD.
|
||||||
|
|
||||||
|
-blank "deformat_quickest" addresses a peculiarity of DVD-RW.
|
||||||
|
It will work on other media like -blank "fast".
|
||||||
|
|
||||||
|
Except the blanking runs, the tests may also be performed on BD-R, DVD-R,
|
||||||
|
DVD+R, and CD-R. But you would waste two media by this.
|
||||||
|
|
||||||
|
The first session on CD will always be written with write type SAO,
|
||||||
|
further sessions will be written with TAO.
|
||||||
|
|
||||||
|
All four media types have a simulation mode. It can be enabled by xorriso
|
||||||
|
command -dummy "on", but of course it will not produce readable results.
|
||||||
|
So this simulation is usable only for first sessions on blank media.
|
||||||
|
|
||||||
|
-----------------------------------------------------------------------------
|
||||||
|
|
||||||
|
Now for formatted overwritable media.
|
||||||
|
|
||||||
|
The write methods and states of formatted media differ from those of
|
||||||
|
sequential media. But xorriso presents to the user a unified
|
||||||
|
multi-session usage model, under the assumption that all emulated
|
||||||
|
sessions contain ISO 9660 filesystem images, which successively
|
||||||
|
build on each other.
|
||||||
|
|
||||||
|
So from the view of xorriso commands, there is only the task of
|
||||||
|
getting those media formatted, which makes them differ from the
|
||||||
|
sequential media mentioned above.
|
||||||
|
|
||||||
|
A special case are BD-R, which xorriso may format but will not bring
|
||||||
|
into (pseudo-) overwritable state. Formatted BD-R perform Defect
|
||||||
|
Management by default, which checkread during writing and replaces
|
||||||
|
bad block. Nice idea in theory. My practical experience is not so good.
|
||||||
|
Ill media stay ill media and should be replaced as soon as possible.
|
||||||
|
|
||||||
|
Formatting of unused DVD+RW and BD-RE is done by xorriso automatically.
|
||||||
|
Just start a normal write run. DVD-RAM are sold formatted.
|
||||||
|
|
||||||
|
De-formatting is only possible with DVD-RW.
|
||||||
|
|
||||||
|
xorriso treats overwritable media with a valid ISO 9660 filesystem as
|
||||||
|
appendable media. To make then writable from scratch, apply
|
||||||
|
-blank "as_needed", which will actually write a few bytes into the PVD
|
||||||
|
(superblock) of the ISO filesystem to invalidate it.
|
||||||
|
|
||||||
|
There is no way to close formatted media. The command -close "on"
|
||||||
|
gets silently ignored.
|
||||||
|
|
||||||
|
-----------------------------------------------------------------------------
|
||||||
|
|
||||||
|
Format DVD-RW for overwriting without intermediate blanking,
|
||||||
|
or format BD-R for Defect Management:
|
||||||
|
{{{
|
||||||
|
$ xorriso -outdev /dev/sr1 -format as_needed
|
||||||
|
}}}
|
||||||
|
should report on stderr
|
||||||
|
{{{
|
||||||
|
...
|
||||||
|
xorriso : UPDATE : Formatting ( 99.0% done in 116 seconds )
|
||||||
|
Formatting done
|
||||||
|
xorriso : NOTE : Re-assessing -outdev '/dev/sr1'
|
||||||
|
Drive current: -outdev '/dev/sr1'
|
||||||
|
Media current: DVD-RW restricted overwrite
|
||||||
|
Media status : is blank
|
||||||
|
Media summary: 0 sessions, 0 data blocks, 0 data, 4488m free
|
||||||
|
}}}
|
||||||
|
As with blanking, one should not worry if the progress messages show
|
||||||
|
unplausible percentages. Some drives are more equal than others.
|
||||||
|
|
||||||
|
Formatting is said to be much stress to the medium. -format option
|
||||||
|
"as_needed" applies it only to yet unformatted media.
|
||||||
|
|
||||||
|
When performing above write tests, take care to use -blank "as_needed"
|
||||||
|
rather than -blank "deformat_quickest". Else you will get a sequential
|
||||||
|
unformatted DVD-RW rather than a formatted DVD-RW which xorriso is
|
||||||
|
willing to write from scratch.
|
||||||
|
There is no use in a separate "DAO" test on overwritable media anyway.
|
||||||
|
|
||||||
|
-----------------------------------------------------------------------------
|
||||||
|
|
||||||
|
Change the formatted size of a BD-RE:
|
||||||
|
|
||||||
|
First learn about formatted size and proposals of other sizes.
|
||||||
|
(One can issue own wishes, too. See in man xorriso, command -format.)
|
||||||
|
{{{
|
||||||
|
$ xorriso -outdev /dev/sr1 -list_formats
|
||||||
|
}}}
|
||||||
|
should tell on stdout
|
||||||
|
{{{
|
||||||
|
...
|
||||||
|
Format status: formatted, with 23610.0 MiB
|
||||||
|
BD Spare Area: 0 blocks consumed, 131072 blocks available
|
||||||
|
Format idx 0 : 00h , 11826176s , 23098.0 MiB
|
||||||
|
Format idx 1 : 01h , 11564032s , 22586.0 MiB
|
||||||
|
Format idx 2 : 30h , 11826176s , 23098.0 MiB
|
||||||
|
Format idx 3 : 30h , 11564032s , 22586.0 MiB
|
||||||
|
Format idx 4 : 30h , 12088320s , 23610.0 MiB
|
||||||
|
Format idx 5 : 31h , 12219392s , 23866.0 MiB
|
||||||
|
}}}
|
||||||
|
So lets go back from 23610.0 MiB to the default size of 23098.0 MiB
|
||||||
|
{{{
|
||||||
|
$ xorriso -outdev /dev/sr1 -format by_index_2 -blank as_needed
|
||||||
|
...
|
||||||
|
Media summary: 2 sessions, 105470 data blocks, 206m data, 22.4g free
|
||||||
|
}}}
|
||||||
|
Although the heads of the old sessions might remain readable after
|
||||||
|
-format, better do not rely on this and a append -blank "as_needed" to
|
||||||
|
avoid any data corruption.
|
||||||
|
If you want to keep the data, then make at least a checkread run.
|
||||||
|
|
||||||
|
Check whether the size has changed:
|
||||||
|
{{{
|
||||||
|
$ xorriso -outdev /dev/sr1 -list_formats
|
||||||
|
}}}
|
||||||
|
should tell on stdout
|
||||||
|
{{{
|
||||||
|
...
|
||||||
|
Format status: formatted, with 23098.0 MiB
|
||||||
|
BD Spare Area: 0 blocks consumed, 393216 blocks available
|
||||||
|
Format idx 0 : 00h , 11826176s , 23098.0 MiB
|
||||||
|
Format idx 1 : 01h , 11564032s , 22586.0 MiB
|
||||||
|
Format idx 2 : 30h , 11826176s , 23098.0 MiB
|
||||||
|
Format idx 3 : 30h , 11564032s , 22586.0 MiB
|
||||||
|
Format idx 4 : 30h , 12088320s , 23610.0 MiB
|
||||||
|
Format idx 5 : 31h , 12219392s , 23866.0 MiB
|
||||||
|
}}}
|
||||||
@ -1 +1 @@
|
|||||||
#define Xorriso_timestamP "2011.11.04.102805"
|
#define Xorriso_timestamP "2011.11.09.131243"
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user