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Sun Cluster 2.2 System Administration Guide

Adding or Replacing Sun StorEdge A5000 Disks

When adding or replacing Sun StorEdge A5000 disks, be sure to refer to the documentation that came with your system for more information.

Note -

When replacing a failed A5000 disk under VxVM control, you cannot simply pull out the disk and replace it with a new one. This is because each disk has a unique World Wide Name (WWN). See "Replacing a SPARCstorage Array Controller and Changing the World Wide Name", for more information about the WWN.

How to Add a Sun StorEdge A5000 Disk (Solstice DiskSuite)

  1. Use the luxadm command to insert the new disk.

    Physically install the new disk or disks when prompted. Repeat for each node that is physically connected to the array.


    # luxadm insert enclosure.slot

  2. Insert the new disk drive and enter Return.

  3. Use format to create a disk label and repartition, if needed.

  4. Use scdidadm(1M) to discover the new disk and create a DID instance for it.

    This should be run from node1 only. See the scdidadm(1M) man page for details.


    # scdidadm -r -H node2,node3...

This completes the disk addition procedure.

How to Add a Sun StorEdge A5000 Disk (VxVM)

  1. Use the luxadm command to prepare the loop for a new device.

    Physically install the new disk or disks when prompted.


    # luxadm insert

  2. Notify VxVM of the new disk.


    # vxdctl enable

  3. Use the vxdiskadm command to bring the new disk(s) into VxVM control.

    Enter 1 (Add or initialize one or more disks).

This completes the disk addition procedure.

How to Replace a Sun StorEdge A5000 Disk (Solstice DiskSuite)

  1. Identify all metadevices or applications using the failing disk.

    If the metadevices are mirrored or RAID5, the disk can be replaced without stopping the metadevices. Otherwise all I/O to the disk must be stopped using the appropriate commands. For example, use the umount(1M) command to unmount a file system on a stripe or concatenation.

  2. Preserve the disk label, if necessary.

    For example:


    # prvtoc /dev/rdsk/c1t3d0s2 > /tmp/c1t3d0.vtoc

  3. (optional) Use metareplace to replace the disk slices if the disk has not been hot-spared.

    For example:


    # metareplace d1 c1t3d0s2 c1t2d0s2
d1: device c1t3d0s2 is replaced with c1t2d0s2

  4. Use luxadm -F to remove the disk.

    The -F option is required because Solstice DiskSuite does not offline disks. Repeat the command for all hosts, if the disk is multihosted. For example: 


    # luxadm remove -F /dev/rdsk/c1t3d0s2
WARNING!!! Please ensure that no filesystems are mounted on these device(s).  All data on these devices should have been backed up.The list of devices which will be removed is:  

1: Box Name "macs1" rear slot 1

Please enter `q' to Quit or <Return> to Continue: stopping:  Drive in "macs1" rear  slot 1....Done

offlining: Drive in "macs1" rear  slot 1....Done

Hit <Return> after removing the device(s).

    Note -

    The FPM icon for the disk drive to be removed should be blinking. The amber LED under the disk drive should also be blinking.

  5. Remove the disk drive and enter Return.

    The output should look similar to the following:


    Hit <Return> after removing the device(s).  

Drive in Box Name "macs1" rear slot 1    

Removing Logical Nodes:  

Removing c1t3d0s0 Removing c1t3d0s1 Removing c1t3d0s2 Removing c1t3d0s3 Removing c1t3d0s4 Removing c1t3d0s5 Removing c1t3d0s6 Removing c1t3d0s7 Removing c2t3d0s0 Removing c2t3d0s1 Removing c2t3d0s2 Removing c2t3d0s3 Removing c2t3d0s4 Removing c2t3d0s5 Removing c2t3d0s6 Removing c2t3d0s7
#

  6. Repeat Step 4 for all nodes, if the disk array is in a multi-host configuration.

  7. Use the luxadm insert command to insert the new disk.

    Repeat for all nodes. The output should be similar to the following:


    # luxadm insert macs1,r1
The list of devices which will be inserted is:  

1: Box Name "macs1" rear slot 1

Please enter `q' to Quit or <Return> to Continue: Hit <Return> after inserting the device(s).

  8. Insert the disk drive and enter Return.

    The output should be similar to the following: 


    Hit <Return> after inserting the device(s).  Drive in Box Name "macs1" rear slot 1  Logical Nodes under /dev/dsk and /dev/rdsk : c1t3d0s0 c1t3d0s1 c1t3d0s2 c1t3d0s3 c1t3d0s4 c1t3d0s5 c1t3d0s6 c1t3d0s7 c2t3d0s0 c2t3d0s1 c2t3d0s2 c2t3d0s3 c2t3d0s4 c2t3d0s5 c2t3d0s6 c2t3d0s7#

    Note -

    The FPM icon for the disk drive you replaced should be lit. In addition, the green LED under the disk drive should be blinking.

  9. Use scdidadm(1M) to update the DID pseudo device information.

    On all nodes connected to the disk, execute the following command to update new Disk ID information. 


    # scdidadm -R DID_instance

    where DID_instance is the instance number of the disk that was replaced. Refer to the scdidadm(1M) man page for more information.

  10. Reboot all nodes connected to the new disk.

    To avoid down time, use the haswitch(1M) command to switch ownership of all logical hosts that can be mastered by the node to be rebooted. For example, 


    # haswitch phys-hahost2 hahost1 hahost2

  11. Label the disk, if necessary.

    For example: 


    # cat /tmp/c1t3d0.vtoc | fmthard -s - /dev/rdsk/c1t3d0s2
fmthard:  New volume table of contents now in place.

  12. Replace the metadb, if necessary.

    For example: 


    # metadb -d c1t3d0s0; metadb -a c1t3d0s0

  13. Enable the new disk slices with metareplace -e.

    For example: 


    # metareplace -e d0 c1t3d0s0
d0: device c1t3d0s0 is enabled

    This completes the disk replacement procedure.

How to Replace a Sun StorEdge A5000 Disk (VxVM)

  1. Identify all volumes or applications using the failing disk.

    If the volumes are mirrored or RAID5, the disk can be replaced without stopping the volume. Otherwise all I/O to the disk must be stopped using the appropriate commands. For example, use the umount(1M) command to unmount a file system on a stripe or concatenation.

  2. Use the vxdiskadm command to replace and offline a disk device.

    For VxVM, perform these commands on the machine mastering the logical host owning the disk group.

    Enter 4 (Remove a disk for replacement), then enter 11 (Disable [offline] a disk device).

    You can use the graphical user interface instead, if you prefer it.

  3. Use the luxadm command to remove the device and device nodes.

    This command is interactive and will prompt you to physically remove the disk. Perform the command on every node connected to the array. For example:


    # luxadm remove_device -F /dev/rdsk/c2t20d0s2

  4. Physically replace the disk, then use the luxadm command to insert the new disk.

    This creates the new device and device nodes. Perform the command on every node connected to the array. For example:


    # luxadm insert_device ratbert,r4

  5. Notify the volume manager of the new disk.


    # vxdctl enable

  6. Use the vxdiskadm command to bring the new disk under VxVM control.

    Enter 5 (Replace a failed or removed disk).

  7. (Optional) The volume can now be restored if necessary.

This completes the disk replacement procedure.