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SRN Problem Possible Causes
42528 Description: A fast-write disk drive has been detected that was previously
unsynchronized, but has since been configured on a different adapter.
Action: If this disk drive contains data that should be kept, return the disk
drive to the adapter to which it was previously connected.
If the disk drive does not contain data that should be kept:
1. Physically remove the disk drive from the system configuration.
2. Ask the user to delete all offline items (see “Enabling or Disabling
Fast-Write for Multiple Devices” on page 215).
3. When the items have been deleted, reinstall the disk drive that you
have just removed.
User or service action.
42529 Description: The fast-write cache is inactive. The battery is in a
fast-charge operation. It remains in the fast-charge operation for up to one
hour after the adapter has been connected to the power. During this time,
the fast-write function remains inactive. (Inactive means that although
fast-write disk drives can be enabled and accessed, they are not
using the fast-write function.).
Action: If the using system has been switched on for less than one hour,
wait for the battery to complete charging.
If the using system has been switched on for more than one hour, run
diagnostics to the adapter in System Verification mode. If the same SRN
is generated, exchange the FRU for a new FRU.
The using system has recently
been switched on. The battery
is still charging.
Possible FRUs:
Fast-Write Cache Option
Card battery (100%)
(“Removing the Fast-Write
Cache Option Card of an
Advanced SerialRAID
Adapter” on page 332).
4252A Description: The supply voltage to the Fast-Write Cache Option Card is
low. The card has switched to Self-Refresh mode.
Action: In the sequence shown, exchange the FRUs for new FRUs.
Possible FRUs:
Fast-Write Cache Option
Card (90%) (“Removing the
Fast-Write Cache Option
Card of an Advanced
SerialRAID Adapter” on
page 332).
SSA adapter card (10%)
(“Removing and Replacing
an Advanced SerialRAID
Adapter” on page 327).
4252B Description: The Fast-Write Cache Option Card battery has reached the
end of its life. The fast-write cache is disabled.
Action: Exchange the FRU for a new FRU.
Possible FRUs:
Fast-Write Cache Option
Card battery (100%)
(“Removing the Fast-Write
Cache Option Card of an
Advanced SerialRAID
Adapter” on page 332).
Chapter 18. SSA Problem Determination Procedures
421
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