Removing The Fans; Volume Controller 2145-Cg8 Or 2145-Cf8; Node - IBM SAN Volume Controller 2145-CG8 Hardware Maintenance Manual

2. Route the operator-information panel cable into position along the same path that it was removed
from:
a. Pass to the right of the mounting bracket for the rightmost fan (when viewed from the front of the
node and ignoring the fan on the power supply).
b. Go between the fans and the disk drive backplane, under the cable retention-clip, and around the
processor fans to the left side of the node.
c. Bring it forward to the operator-information panel.
3. Use a tie-wrap to hold the cable assembly to the lower right front corner of the mounting bracket for
the rightmost fan.
4. Connect the two connectors on the other end of the cable to the connectors on the
operator-information panel board. The connectors are keyed and it is important to insert the correct
connector on the cable onto the correct connector on the operator-information panel board.
5. If the backplane was removed, replace the backplane, disk drive, and service controller. See
"Removing the disk-drive backplane" on page 126.
6. Rotate the air deflector back into place, making sure not to pinch any cables beneath it, and press it
down firmly. Ensure that any other cable that was unplugged or moved is returned to its original
position and does not obstruct the top cover of the node.
7. Replace the top cover. See "Replacing the top cover" on page 81.
8. Place the node in the rack. See "Replacing the SAN Volume Controller in a rack" on page 55.
9. Connect the power cable to the node and replace the cable-retention bracket. See "Replacing the
cable-retention bracket" on page 39.

Removing the fans

The SAN Volume Controller fans might have to be replaced due to failure.
Removing the SAN Volume Controller 2145-CG8 or 2145-CF8 fans
You can remove a SAN Volume Controller 2145-CG8 or 2145-CF8 fan.
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Take precautions to avoid damage from static electricity. Wear an anti-static wrist strap and use a
static-protected mat or surface. For more information, see "Handling static-sensitive devices" on page xx.
Important: You can hot swap a fan. However, using MAP 5350 to power off the node through proven
methods avoids risking an abrupt power failure on the node, which avoids the possible corruption of
data.
Perform the following steps to remove a failed fan:
1. Read the safety information to which "Preparing to remove and replace parts" on page 26 refers.
2. Optional: Follow the procedure in MAP 5350 in the IBM System Storage SAN Volume Controller
Troubleshooting Guide to verify that the node data is mirrored and synchronized, and that there are no
dependent volumes before turning off the node.
Important: If you decide to hot swap the fan, use MAP 5350 to make all of the necessary checks that
ensure that the partner node in the I/O group can take over all I/O group operations, if necessary,
and that there are no dependent volumes (VDisks) on the node. With the partner node available and
no dependent volumes on the node, you do not lose access to data if this node accidentally powers
off.
| 3. Slide the node forward to remove the cover and expose the fans, as described in "Removing the SAN
Volume Controller 2145-CG8 or 2145-CF8 top cover" on page 77.
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Figure 238 on page 240 shows fan locations within the SAN Volume Controller 2145-CG8 or 2145-CF8
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node.

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Chapter 2. Removing and replacing parts
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