6760 ServerNet/DA Manual

Operating the 6760 ServerNet/DA

6760 ServerNet/DA Manual—424879-003

4-17

Preparing to Replace a PMF CRU or IOMF CRU

The 6760 adapter depends on X-fabric or Y-fabric communication from the PMF CRUs

and IOMF CRUs in the group of enclosures where the 6760 adapter is installed. For

detailed information about how the PMF CRU and IOMF CRU can affect system

adapters, see the NonStop S-Series Planning and Configuration Guide.

The PMF CRU or IOMF CRU in slot 50 provides the X-fabric communication for the

6760 adapters installed in slots 51 and 53. The PMF CRU or IOMF CRU in slot 55

provides the Y-fabric communication for the 6760 adapters installed in slots 52 and 54.

Before You Remove a PMF CRU or IOMF CRU

If you are removing a PMF CRU or IOMF CRU, you must prepare the affected 6760

adapter.

Note that the only supported method of removing a PMF CRU or an IOMF CRU is to

use the Guided Replacement Toolkit. The Guided Replacement Toolkit will perform

Step 2, Step 3a, Step 3b, and Step 3c automatically. For more information about the

Guided Replacement Tool and how to access it, refer to the NonStop S-Series

Hardware Support Guide.

1. Determine which adapter will be affected by the CRU replacement.

2. Determine the status of the affected adapter and its devices with the SCF STATUS

ADAPTER command. For example:

-> STATUS ADAPTER $ZZSTO.#SNDA.GRP-1.MOD-1.SLOT-53, DETAIL

3. For all paths to the devices connected to the affected adapter:

Volume Switching shows how the tape process handles end-of-tape (EOT)

messages. Values can be:

EOT The user of the volume is notified of a tape

switch by file-system error 150 (EOT).

TRANSPARENT Volume switching is transparent. The user

is not notified when a volume ends.

The PMF CRU or IOMF CRU in... Controls the 6760 adapters in...

Slot 50 Slots 51 and 53

Slot 55 Slots 52 and 54