HP Surestore E Disk Array XP256 Familiarization Guide - Page 39

Service Information, Error Condition, Recommended Action, Pull the emergency power-off EPO switch.

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Error Condition Pinned track. Emergency: fire, earthquake, flood, etc. ALARM LED is on. Recommended Action A "pinned track" occurs when a disk drive failure temporarily prevents data from being destaged from cache to disk. The next time the data on the pinned track is accessed by the host, the data is destaged to another disk location. The RAID technology and dynamic spare disk drives of the disk array ensure full recovery from disk drive failures and non-stop access to user data. Data can remain pinned in cache if it is not accessed by the host following the pinned track condition. Maintenance activities (for example, microcode updates) require that all pinned tracks be cleared. If an HP service representative encounters pinned tracks during these activities, user assistance can be required to access the data (for example, run DSF Inspect, read and write specific data) to cause it to be destaged to disk. Pull the emergency power-off (EPO) switch. Refer to the process outlined in "Emergency Power-Off" (page 31). Call the HP support center to have the EPO switch reset. If there is an ambient temperature problem in the area (see "Specifications", page 51), lower the room temperature and call your HP support representative. If the area temperature is not the obvious cause of the alarm, call the HP support center for assistance. Service Information 39

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39
Service Information
Pinned track.
A “pinned track” occurs when a disk drive failure
temporarily prevents data from being destaged from
cache to disk. The next time the data on the pinned
track is accessed by the host, the data is destaged to
another disk location. The RAID technology and
dynamic spare disk drives of the disk array ensure full
recovery from disk drive failures and non-stop access
to user data.
Data can remain pinned in cache if it is not accessed
by the host following the pinned track condition.
Maintenance activities (for example, microcode
updates) require that all pinned tracks be cleared.
If an HP service representative encounters pinned
tracks during these activities, user assistance can be
required to access the data (for example, run DSF
Inspect, read and write specific data) to cause it to be
destaged to disk.
Emergency: fire, earthquake, flood, etc.
Pull the emergency power-off (EPO) switch.
Refer to
the process outlined in “Emergency Power-Off” (page
31).
Call the HP support center to have the EPO
switch reset.
ALARM LED is on.
If there is an ambient temperature problem in the area
(see “Specifications”, page 51), lower the room
temperature and call your HP support representative.
If the area temperature is not the obvious cause of the
alarm, call the HP support center for assistance.
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Error Condition
Recommended Action