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Setting up shared storage

The following sections describe setting up SCSI and Fibre Channel devices that the cluster systems share. For VCS I/O fencing, the data disks must support SCSI-3 persistent reservations. You need to configure a coordinator disk group that supports SCSI-3 PR and verify that it works.

See Setting up I/O fencing.

See also the Veritas Cluster Server User's Guide for a description of I/O fencing.

Setting up shared storage: SCSI

 To set up shared storage

1. Connect the disk to the first cluster system.
2. Power on the disk.
3. Connect a terminator to the other port of the disk.
4. Boot the system. The disk is detected while the system boots.
5. Press CTRL+A to bring up the SCSI BIOS settings for that disk.
   • Set Host adapter SCSI ID = 7, or to an appropriate value for your configuration.
   • Set Host Adapter BIOS in Advanced Configuration Options to Disabled.
6. Format the shared disk and create required partitions on it.
   • Identify your shared disk name. If you have two internal SCSI hard disks, your shared disk is /dev/sdc.

     Identify whether the shared disk is sdc, sdb, and so on.

   • Type the following command:

     # fdisk /dev/shareddiskname

     For example, if your shared disk is sdc, type:

     # fdisk /dev/sdc

   • Create disk groups and volumes using Volume Manager utilities.
   • To apply a file system on the volumes, type:

     # mkfs -t fs-type /dev/vx/dsk/disk-group/volume

     For example, enter the following command if the name of the disk group is dg, the name of the volume is vol, and the file system type is vxfs.

     # mkfs -t vxfs /dev/vx/dsk/dg/vol01

7. Power off the disk.
8. Remove the terminator from the disk and connect the disk to the other cluster system.
9. Power on the disk.
10. Boot the second system. The system can now detect the disk.
11. Press Ctrl+A to bring up the SCSI BIOS settings for the disk.
    • Set Host adapter SCSI ID = 6, or to an appropriate value for your configuration. Note that the SCSI ID should be different from the one configured on the first cluster system.
    • Set Host Adapter BIOS in Advanced Configuration Options to Disabled.
12. Verify that you can view the shared disk using the fdisk command.

Setting up shared storage: Fibre Channel

 To set up shared storage for fibre channel

1. Connect the fibre channel disk to a cluster system.
2. Boot the system and change the settings of the fibre channel. Perform the tasks for all QLogic adapters in the system:
   • Press Alt+Q to bring up the QLogic adapter settings menu.
   • Choose Configuration Settings.
   • Click Enter.
   • Choose Advanced Adapter Settings.
   • Click Enter.
   • Set the Enable Target Reset option to Yes (the default value).
   • Save the configuration.
   • Reboot the system.
3. Verify that the system is detecting the fibre channel disks properly.
4. Create volumes. Format the shared disk and create required partitions on it.
   • Identify your shared disk name. If you have two internal SCSI hard disks, your shared disk is /dev/sdc.

     Identify whether the shared disk is sdc, sdb, and so on.

   • Type the following command:

     # fdisk /dev/shareddiskname

     For example, if your shared disk is sdc, type:

     # fdisk /dev/sdc

   • Create disk groups and volumes using Volume Manager utilities.
   • To apply a file system on the volumes, type:

     # mkfs -t fs-type /dev/vx/dsk/disk-group/volume

     For example, enter the following command if the name of the disk group is dg, the name of the volume is vol, and the file system type is vxfs.

     # mkfs -t vxfs /dev/vx/dsk/dg/vol01

5. Repeat step 2 and step 3 for all nodes in the clusters that require connections with fibre channel.
6. Power off this cluster system.
7. Connect the same disks to the next cluster system.
8. Turn on the power for the second system.
9. Verify that the second system can see the disk names correctly—the disk names should be the same.