Removing the disk-drive backplane: 2145-CG8 or 2145-CF8

Use the following information to remove the disk-drive backplane from a SAN Volume Controller 2145-CG8 or 2145-CF8 node.

Before you begin

DANGER

Multiple power cords. The product might be equipped with multiple power cords. To remove all hazardous voltages, disconnect all power cords. (L003)

or

or

1. Read the safety information to which Preparing to remove and replace parts refers.
2. Follow the procedure in MAP 5350: Powering off a node to verify that hosts will not lose access to data in volumes before you power off the node.
3. Slide the node out on its slide rails to the fully extended position.
4. When the node is completely turned off, remove the cable-retention brackets and disconnect the power cables, as described in Removing the cable-retention bracket.
5. Optional: To make sure that you can replace all cables in the same ports from which they were removed, label the port position of each Fibre Channel and Ethernet cable; then remove all cables from the back of the node.

   You can leave the Fibre Channel and Ethernet cables connected, if you are using the cable-management arm and if you are not removing the node from the rack.

6. Optional: Remove the node from the rack and place it on a flat, static-protective surface. See Removing a node from a rack.

   You can accomplish most service actions when the node is fully extended from the rack on its slide rails. If the location of the node in the rack is too high or too low to work comfortably, you can remove the node from the rack.

7. Remove the service controller. See Removing the service controller.
8. Pull the disk drives and filler panels out of the node slightly to disengage them from the backplane. See Removing the boot drive.
9. Remove the top cover, as described in Removing the top cover: 2145-CG8 or 2145-CF8.
10. Remove fans 4, 5, and 6, as described in Removing the fans: 2145-CG8 or 2145-CF8.
11. Disconnect all cables from the disk-drive backplane.
    Note: You can also choose to disconnect the cables after removing the backplane from the brackets, if that is easier for you.

    The high-speed SAS cable and the boot-disk SAS cable are shown in Figure 1.

    The boot-disk cable is shown after disconnecting the cable from the disk controller so that you can see the connectors more clearly.

    Figure 1. Boot-disk SAS cable and the high-speed SAS cable connected to the disk backplane in the SAN Volume Controller 2145-CG8 or 2145-CF8

    
    The SAN Volume Controller 2145-CG8 has two backplanes. Each backplane supports four of the eight drive bays. One backplane supports the boot disk in drive bay 6 and drive bays 4, 5, and 7, which are either reserved or empty. The other backplane supports the optional flash drives in drive bays 0, 1, 2, and 3.

    •  1  Boot-disk signal cable that is plugged into the disk-drive backplane to support drive bay 6 on the SAN Volume Controller 2145-CG8 or drive bay 4 on the SAN Volume Controller 2145-CF8
    •  2  High-speed SAS-adapter cable that is plugged into the middle of the disk drive backplane to support drive bays 0, 1, 2, and 3
    • (Not pictured) Backplane-control cable that is in the lower right connector on the back of the backplane
12. Lift up the disk-drive backplane ( 1  in each of the following two illustrations to disengage the backplane edges (2145-CG8) or tabs (2145-CF8) ( 2 ) from the slots ( 3 )on a backplane bracket.
    In the 2145-CG8 node, pull up slowly on each backplane until it is clear of the slots on the bracket and remove it from the node, as shown in Figure 2.

    Figure 2. The 2145-CG8 boot-disk backplane

    
    In the 2145-CF8 node, push the backplane backwards until it is clear of the slots on the bracket and remove it from the node, as shown in Figure 3.

    Figure 3. The SAN Volume Controller 2145-CF8 disk backplane

    
    •  1  Disk-drive backplane
    •  2  Backplane edges on the 2145-CG8 and tabs on the 2145-CF8
    •  3  Backplane-bracket slots
13. If you are instructed to return a disk-drive backplane, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you.