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Protocol
Description
tap:qcow:
QEMU disk images accessed by using
blktap
iscsi:
iSCSI targets using connections initiated
from domain 0
npiv:
Fibre Channel connections initiated from
domain 0
7.2 File-Backed Virtual Disks and
Loopback Devices
When a virtual machine is running, each of its file-backed virtual disks consumes a
loopback device on the host. By default, the host allows up to 64 loopback devices to
be consumed.
To simultaneously run more file-backed virtual disks on a host, you can increase the
number of available loopback devices by adding the following option to the host's
/etc/modprobe.conf.local file.
options loop max_loop=x
where x is the maximum number of loopback devices to create.
Changes take effect after the module is reloaded.
TIP
Enter rmmod loop and modprobe loop to unload and reload the module.
In case rmmod does not work, unmount all existing loop devices or reboot the
computer.
Example
tap:qcow:/path/file
iscsi:IQN,LUN
npiv:NPIV,LUN
Block Devices in Xen
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