Citrix Systems 5.6 Benutzerhandbuch

Destroying or forgetting a SR

You can destroy an SR, which actually deletes the contents of the SR from the physical media. Alternatively

you can forget an SR, which allows you to re-attach the SR, for example, to another XenServer host, without

removing any of the SR contents. In both cases, the PBD of the SR must first be unplugged. Forgetting an

SR is the equivalent of the

SR Detach operation within XenCenter.

1. Unplug the PBD to detach the SR from the corresponding XenServer host:

xe pbd-unplug uuid=

<pbd_uuid>

2. To destroy the SR, which deletes both the SR and corresponding PBD from the XenServer host database

and deletes the SR contents from the physical media:

xe sr-destroy uuid=

<sr_uuid>

3. Or, to forget the SR, which removes the SR and corresponding PBD from the XenServer host database

but leaves the actual SR contents intact on the physical media:

xe sr-forget uuid=

<sr_uuid>

Note:

It might take some time for the software object corresponding to the SR to be garbage collected.

Introducing an SR

Introducing an SR that has been forgotten requires introducing an SR, creating a PBD, and manually

plugging the PBD to the appropriate XenServer hosts to activate the SR.

The following example introduces a SR of type lvmoiscsi.

1. Probe the existing SR to determine its UUID:

xe sr-probe type=lvmoiscsi device-config:target=

<192.168.1.10>

device-config:targetIQN=

<192.168.1.10:filer1>

device-config:SCSIid=

<149455400000000000000000002000000b70200000f000000>

2. Introduce the existing SR UUID returned from the

sr-probe command. The UUID of the new SR is

returned:

xe sr-introduce content-type=user name-label=

<"Example Shared LVM over iSCSI SR">

shared=true uuid=

<valid_sr_uuid>

type=lvmoiscsi

3. Create a PBD to accompany the SR. The UUID of the new PBD is returned:

xe pbd-create type=lvmoiscsi host-uuid=

<valid_uuid>

sr-uuid=

<valid_sr_uuid>

device-config:target=

<192.168.0.1>

device-config:targetIQN=

<192.168.1.10:filer1>

device-config:SCSIid=

<149455400000000000000000002000000b70200000f000000>

4. Plug the PBD to attach the SR:

xe pbd-plug uuid=

<pbd_uuid>

5. Verify the status of the PBD plug. If successful the

currently-attached

property will be true:

xe pbd-list sr-uuid=

<sr_uuid>

Note:

Steps 3 through 5 must be performed for each host in the resource pool, and can also be performed using
the Repair Storage Repository function in XenCenter.