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virsh: Document subdriver option of attach-disk

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Jiri Denemark 2012-08-30 17:51:35 +02:00
parent 774eb45be6
commit eac1ab053c
1 changed files with 9 additions and 3 deletions
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tools/virsh.pod
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@ -1675,9 +1675,15 @@ I<source> is path for the files and devices. I<target> controls the bus or
device under which the disk is exposed to the guest OS. It indicates the
"logical" device name. I<driver> can be I<file>, I<tap> or I<phy> for the Xen
hypervisor depending on the kind of access; or I<qemu> for the QEMU emulator.
I<type> can indicate I<lun>, I<cdrom> or I<floppy> as alternative to the disk default,
although this use only replaces the media within the existing virtual cdrom or
floppy device; consider using B<update-device> for this usage instead.
Further details to the driver can be passed using I<subdriver>. For Xen
I<subdriver> can be I<aio>, while for QEMU subdriver should match the format
of the disk source, such as I<raw> or I<qcow2>. Hypervisor default will be
used if I<subdriver> is not specified. However, the default may not be
correct, esp. for QEMU as for security reasons it is configured not to detect
disk formats. I<type> can indicate I<lun>, I<cdrom> or I<floppy> as
alternative to the disk default, although this use only replaces the media
within the existing virtual cdrom or floppy device; consider using
B<update-device> for this usage instead.
I<mode> can specify the two specific mode I<readonly> or I<shareable>.
I<--config> indicates the changes will affect the next boot of the domain,
for compatibility purposes, I<--persistent> is alias of I<--config>.