HP NetRAID-4M Configuration and Upgrade Guide (Release 5)

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Chapter 9 Issues and Problem Resolution
Example: On some servers (such as the LH 6000) the hard disk drive’s red LED will
blink; on others (such as the LPr), the red LED will not be seen at all.
Resolution: Disable background consistency check prior to HDD firmware
upgrade.
19 Rack Storage/12 and voltage regulation
Problem: There is a data-rate sensitivity in some Adapter Boards used in RS/12
enclosures. The symptom is that random drives in the RS/12 go offline at random
times. This applies only to RS/12 Disk Enclosure models D5989A and D5989B.
Does not apply to drive cages inside servers or the RS/12FC Fibre Channel model
D5991A. It is not specific to any one drive model.
Frequency of Occurrence: This occurs under heavy data transfer load. In a system
with a vulnerable board under normal workload, there may be drive-offline incidents
on the order of once every two months. In a system that is under heavy load
(especially one that is being evaluated with artificial loads well beyond realistic
usage), a vulnerable RS/12 can have a false drive-offline incident in a few minutes.
How to tell an old Adapter Board from a new one: In a new RS/12, the revised
part number family, “D6025-6x006” is visible on a label on the metal bulkhead
panel of the Adapter Board, without removing the board from the RS/12. If there is
no part number label on the bulkhead, the board is either an original board or it has
already been replaced. Remove the board and check the part number against these:
In the A Model (Product D5989A), the suspect boards are: 5064-6617,
D6025-63006, and D6025-69006
In the B Model (Product D5989B), the suspect boards are: 5064-7944,
D6025-63006, and D6025-69006
Screened boards, without the problem, are: D6025-60006
Resolution: If the symptom is that one drive keeps going offline, replace that drive.
If the symptom is that random drives go offline one at a time at random times,
replace the Adapter Board inside the RS/12. There is no need for proactive
replacement. Replace the board only if there are random drives going offline at
random times.
20 Rack Storage/12 with internal twisted pair cables