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libvirt/docs
Peter Krempa 0d47218419 conf: introduce usb disk models 'usb-storage' and 'usb-bot'
Historically libvirt specified 'usb-storage' as driver for USB disks.
This though combined with '-blockdev' doesn't properly configure the
device to look like CDROM for <disk type='cdrom'>.

'usb-bot' acts like a controler and allows explicitly connecting a
-device to it.

In qemu the devices share implementation so they are effectively
identical and can be used interchangably. There is a difference in how
the storage device itself (the SCSI part) looks when configured properly
as CDROM which is unfortunately not compatible/interchangable.

As this is effectively a bugfix we'll be fixing the behaviour for the
default configuration. The possibility to explicitly set the model is
added as a possibility for working around possible problems if they'd
appear.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
2025-06-24 16:29:12 +02:00
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