Mentioned how to use /dev/vda without /dev/sr1 link

master
Thomas Schmitt 11 years ago
parent a22439e97c
commit 63707ec863
  1. 23
      doc/qemu_xorriso.wiki

@ -59,11 +59,17 @@ 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.
There appears no /dev/sr for the passthrough drive. Thus libburn will not
list it by its drive search function. One may use it nevertheless. But
xorriso will only do so if prefix "mmc:" is used with the address:
{{{
-dev mmc:/dev/vda
}}}
The drive will be listed by libburn if there is a symbolic link /dev/sr*
pointing to it. On Debian 6, this link persists only if it is created
by an udev rule.
/lib/udev/rules.d/50-udev-default.rules:
In /lib/udev/rules.d/50-udev-default.rules:
{{{
KERNEL=="vda", SYMLINK+="sr1"
}}}
@ -72,6 +78,8 @@ 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.
Like with the symbolic link, such a change persists on Debian 6 only as
udev rule.
In /lib/udev/rules.d/91-permissions.rules:
{{{
@ -291,8 +299,9 @@ 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.
Blanking option "as_needed" lets xorriso decide what to do in order
to make the medium writable from scratch. With DVD-RW it will decide for
-blank "all".
The report on stderr should end by
{{{
@ -310,7 +319,7 @@ The report on stderr should end by
----------------------------------------------------------------------
Writing multiple sessions (DVD-R write type Incremental):
Writing multiple sessions (DVD-RW write type Incremental):
This time do not perform command -close "on", so that the medium
stays writable:

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