Disk Array Disk Module Slot Map - Not Orderable

Hewlett-Packard Disk Array

Disk Module Slot Map

The Hewlett-Packard High Availability Fibre Channel Disk Array is pre-configured at the factory. The disk modules are

bound into RAID-5 LUNs and are labeled with a slot number - for example, A3. The disk modules MUST be installed in the

correct slots for the disk array to operate properly.

The following illustration shows the positions of the slots within the disk array. If a disk module is removed from the array,

be sure to attach a label to it and write the slot number on it. If the disk module is to be replaced, be sure to install the

replacement disk module in the correct slot.

If disk modules with different capacities or different model

numbers are mixed within a RAID group, all of the disk

modules will act as though they all match the disk module

of the lowest capacity, and performance will degrade. For

example, if a logical disk unit has five 4-Gbyte disk modules

bound as a RAID 5 group and a disk module fails and the

replacement disk module is a 9-Gbyte disk module, the

9-Gbyte replacement drive will behave as if it were a

4-Gbyte drive.

A global hot spare MUST be equal to or greater than the

largest capacity disk module it could replace.

Do not replace a failed disk module with one of lesser

capacity. If you attempt do so, the data on the failed disk

module will not be rebuilt on the replacement disk module

and a capacity error in the Unsolicited Event Logs will

result. Grid Manager will show the incorrect disk module as

OFF. If another disk module within the same logical disk

unit fails during this state, the entire logical disk unit will

fail and any unwritten data will be lost.

Disk modules containing disk drives from different manu-

facturers should not be mixed in the same LUN. Disk mod-

ules with a capacity marked on them come from one

manufacturer and the others come from another manufac-

turer. The part numbers are different also. Make sure that

these are NOT mixed in the same LUN.

A0 B0 C0 D0 A3E0 B3 C3 D3 E3

A2 B2 C2 D2 A5E2 B5 C5 D5 E5

A1 B1 C1 D1 A4E1 B4 C4 D4 E4

Manual Part Number

A3661-90010 E0897

Hewlett-Packard Company

*PA3661-96010*

A3661-96010

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