This article describes how to introduce a local Storage repository (SR) on XenServer. The XenServer database has become corrupt or your XenServer does not see the local SR.

Instructions

Complete the following procedure:

1. Do a pvscan to get the Universally Unique Identifier (UUID) of an existing SR on a local disk. This example uses UUID 39baf126-a535-549f-58d6-feeda55f7801:

   # pvscan

   PV /dev/sda3 VG VG_XenStorage-39baf126-a535-549f-58d6-feeda55f7801 lvm2 [66.87 GB / 57.87 GB free]
   Total: 1 [66.87 GB] / in use: 1 [66.87 GB] / in no VG: 0 [0 ]

2. Note the output above, the VG name of the local drive /dev/sda3 is VG_XenStorage-39baf126-a535-549f-58d6-feeda55f7801 . The VG name contains the SR UUID that resides on this storage media. In this case, the UUID is 39baf126-a535-549f-58d6-feeda55f7801.

3. Introduce the SR with the following command:

   # xe sr-introduce uuid=39baf126-a535-549f-58d6-feeda55f7801 type=lvm name-label=”Local storage” content-type=user
   This command sets up database records for the SR named “Local storage”.

4. Locate the SCSI ID of the device or partition where the SR data is stored:
   # ls -l /dev/disk/by-id/

   total 0
   lrwxrwxrwx 1 root root 9 Jan 15 09:44 scsi-SATA_ST3500320AS_9QM13WP2 -> ../../sdb
   lrwxrwxrwx 1 root root 10 Jan 15 09:44 scsi-SATA_ST3500320AS_9QM13WP2-part1 -> ../../sdb1
   lrwxrwxrwx 1 root root 9 Jan 15 09:44 scsi-SATA_ST380815AS_6QZ5Z1AM -> ../../sda
   lrwxrwxrwx 1 root root 10 Jan 15 09:44 scsi-SATA_ST380815AS_6QZ5Z1AM-part1 -> ../../sda1
   lrwxrwxrwx 1 root root 10 Jan 15 09:44 scsi-SATA_ST380815AS_6QZ5Z1AM-part2 -> ../../sda2
   lrwxrwxrwx 1 root root 10 Jan 15 09:44 scsi-SATA_ST380815AS_6QZ5Z1AM-part3 -> ../../sda3

   In this case, the SCSI ID of the device /dev/sda3 is scsi-SATA_ST380815AS_6QZ5Z1AM-part3. This is the device name to use in the next command, where a PBD (physical block device – a connector between the XenServer host and the SR) is created.

5. Run the xe host-list command to find out the host UUID for the local host:
   # xe host-list

   uuid ( RO) : 83f2c775-57fc-457b-9f98-2b9b0a7dbcb5
   name-label ( RW): xenserver1
   name-description ( RO): Default install of XenServer

6. Create the PBD using the device SCSI ID, host UUID and SR UUID detected above:
   # xe pbd-create sr-uuid=39baf126-a535-549f-58d6-feeda55f7801
   device-config:device=/dev/disk/by-id/scsi-SATA_ST380815AS_6QZ5Z1AM-part3 host-uuid=83f2c775-57fc-457b-9f98-2b9b0a7dbcb5

   You will get an output like below , which is the uuid of the pbd

   aec2c6fc-e1fb-0a27-2437-9862cffe213e

7. Attach the PBD created with xe pbd-plug command:
   # xe pbd-plug uuid=aec2c6fc-e1fb-0a27-2437-9862cffe213e
   The SR should be connected to the XenServer host and be visible in XenCenter.