Citrix SCSI & RAID Devices Driver Download

| 16-04-2021
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Citrix iSCSI Storage Repository-OpenStack Block Storage (Cinder)-Data protection / management granularity: Datastore-level: VM-level: Security: CHAP: IP-based: Use cases: To achieve consistently high performance in larger deployments: For quicker setup and smaller deployments; easy file/folder-level management. The SCSI ID of the logical unit number (LUN) changed. When this happened, the iSCSI storage repository became unplugged after a XenServer reboot. This article will help you identify if your iSCSI Storage Repository (SR) has changed SCSI IDs and provide steps to repair it. Note: This procedure requires Advance Level Xen Administration Skills.

  1. Citrix Scsi & Raid Devices Driver Download 64-bit
  2. Citrix SCSI & RAID Devices Driver Download
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Objective

The SCSI ID of the logical unit number (LUN) changed. When this happened, the iSCSI storage repository became unplugged after a XenServer reboot. This article will help you identify if your iSCSI Storage Repository (SR) has changed SCSI IDs and provide steps to repair it.

Note: This procedure requires Advance Level Xen Administration Skills. It is advisable to contact Citrix Technical support before you continue recovery.

Instructions

The following procedures describe how to identify and correct the problem with SCSI ID mappings in XenServer.

Scsi

Citrix Scsi & Raid Devices Driver Download 64-bit

Citrix SCSI & RAID Devices Driver Download

Identify the SCSI ID mapping which has issue:

Citrix SCSI & RAID Devices Driver Download

  1. In XenCenter, iSCSI SR General Tab indicates that the Storage Repository is unplugged:

  2. Repair fails with “No such device” error:

  3. Identify what is the current SCSI ID on the LUN containing your Storage Repository:
    # xe sr-probe type=lvmoiscsi device-config:target=<Target IP> device-
    config:targetIQN=<Target IQN>

    Example:
    # xe sr-probe type=lvmoiscsi device-config:target=10.12.45.10 device-config:targetIQN=iqn.1992-08.com.netapp:sn.135027806
    Error code: SR_BACKEND_FAILURE_107
    Error parameters: , The SCSIid parameter is missing or incorrect, <?xml version='1.0' ?>
    <iscsi-target>
    <LUN>
    <vendor>
    NETAPP
    </vendor>
    <serial>
    P3LfCZIcoVML
    </serial>
    <LUNid>
    150
    </LUNid>
    <size>
    23622320128
    </size>
    <SCSIid>
    360a9800050334c66435a49636f564d4c
    </SCSIid>
    </LUN>
    </iscsi-target>

  4. Identify what SCSI ID the XenServer expects to be on the LUN containing your Storage Repository by running the following commands:
    # xe sr-list type=lvmoiscsi - Identify UUID of the SR that is unplugged.
    # xe pbd-list sr-uuid=<SR UUID> - Identify expected SCSI ID of the LUN containing SR that is unplugged.

    Example:
    # xe sr-list type=lvmoiscsi
    uuid ( RO) : f6a7d8be-cd21-d9b2-1864-9c67d7ed1724
    name-label ( RW): iSCSI virtual disk storage
    name-description ( RW): iSCSI SR [10.12.45.10 (iqn.1992-08.com.netapp:sn.135027806)]
    host ( RO): xenserver-dellAMDR131
    type ( RO): lvmoiscsi
    content-type ( RO):

    # xe pbd-list sr-uuid=f6a7d8be-cd21-d9b2-1864-9c67d7ed1724
    uuid ( RO) : 9cd47f3e-944d-0ea2-522c-5c7e399543ab
    host-uuid ( RO): ac3e1d25-c12e-4588-bc35-857ad1fa7e43
    sr-uuid ( RO): f6a7d8be-cd21-d9b2-1864-9c67d7ed1724
    device-config (MRO): port: 3260; target: 10.12.45.10; SCSIid: 360a9800050334c66435a49636f545143; targetIQN: iqn.1992-08.com.netapp:sn.135027806
    currently-attached ( RO): false

    Note: This SCSI ID should match the entry under the XenCenter iSCSI SR General Tab.
    SCSI ID collected from steps 3 and 4 must match. If they do not your LUN SCSI ID has been changed.

Correct SCSI ID mappings

Citrix SCSI & RAID Devices Driver Download

To correct the issue you must recreate a PBD with the entry to reflect the right SCSI ID.

  1. Destroy the existing PBD by running the following commands:
    # xe pbd-unplug uuid=<PBD UUID> - PBD of the iSCSI Storage Repository with mismatched SCSI ID collected from the output of the pbd-list command during your investigation.
    # xe pbd-destroy uuid=<PBD UUID> - PBD of the iSCSI SR with mismatched SCSI ID collected from the output of the pbd-list command during your investigation.

    Example:
    # xe pbd-unplug uuid=9cd47f3e-944d-0ea2-522c-5c7e399543ab
    # xe pbd-destroy uuid=9cd47f3e-944d-0ea2-522c-5c7e399543ab

  2. Create new PBD and activate Storage Repository by running the following commands:
    # xe pbd-create sr-uuid=<SR UUID> host-uuid=<Host UUID> device- config:target=<Target IP> device-config:targetIQN=<Target IQN> device-config:SCSIid=<SCSI ID> - SCSI ID collected from the output of the pbd-list command during your investigation.

    # xe pbd-plug uuid=<PBD UUID> > - Activate SR by plugging in newly created PBD.

    Example:
    # xe pbd-create sr-uuid=f6a7d8be-cd21-d9b2-1864-9c67d7ed1724 host -uuid=ac3e1d25-c12e-4588-bc35-857ad1fa7e43 device-config:target=10.12.45.10 device-config:targetIQN=iqn.1992 -08.com.netapp:sn.135027806 device-config:SCSIid=360a9800050334c66435a49636f564d4c
    2cb5ead5-0184-e5ec-e25d-2897ce402a81 <- Will return UUID of the created PBD.
    # xe pbd-plug uuid=2cb5ead5-0184-e5ec-e25d-2897ce402a81

  3. Confirm that the Storage Repository is active in XenCenter iSCSI SR General Tab.
    Note: XenCenter have to be restarted.

Additional Resources

Additional background and/or reference information can be obtained from the XenServer Administrators guide.