XBD(4) | Device Drivers Manual (xen) | XBD(4) |
xbd
— Xen frontend
paravirtualized block device interface
xbd* at xenbus?
The xbd
interface forms the frontend part
of the paravirtualized drivers used by Xen guest domains to have a block
device interface.
From a guest point of view, xbd
is similar
to a hard disk, and can be treated in the very same way regarding
partitioning, file systems creation and usage, and mounting. By default, a
NetBSD guest domain will assume that
“xbd0a” serves as the root file system.
When the host is NetBSD, the
xbd
interface is backed by a
xbdback(4) interface. In the
XenStore, xbd
and xbdback
are identified by “vbd” (virtual block device) entries.
xbd
interface.xbd
block device, its
sector size and total number of sectors.xbd
device
does not support cache flushing operation. This can be problematic for
file system operations that require cache sync to avoid data loss or
corruption.The xbd
driver first appeared in
NetBSD 3.0.
The xbd
driver was written by
Manuel Bouyer
<bouyer@NetBSD.org>.
January 8, 2011 | NetBSD 10.99 |