Use this MAP to resolve the following problem: Required
cache data cannot be located for one or more disks (SRN nnnn-9050)
for a PCI-X or PCIe controller.
Step 3131-1
Did you just exchange the adapter
as the result of a failure?
- No
- Go to Step 3131-6.
- Yes
- Go to Step Step 3131-2.
Step 3131-2
Is the adapter
connected in an HA RAID configuration (that is, two adapters connected
to the same set of disks)?
- No
- Go to Step 3131-3.
- Yes
- Contact your hardware service provider.
Step 3131-4
Note: Label all
parts (original and new) before moving them.
Using the appropriate
service procedures, remove the 572F/575C card set. Create and install
the new card set that has the following parts installed on it:
- The new replacement 572F storage I/O adapter
- The cache directory card from the original 572F storage I/O adapter
- The original 575C auxiliary cache adapter
Go to Step 3131-11
Step 3131-5
Notes: - The failed adapter that you have just exchanged contains cache
data that is required by the disks that were attached to that adapter.
If the adapter that you just exchanged is failing intermittently,
reinstalling it and IPLing the system might allow the data to be successfully
written to the disks. After the cache data is written to the disks
and the system is powered off normally, the adapter can be replaced
without data being lost. Otherwise, continue with this procedure.
- Label all parts (old and new) before moving them.
Using the appropriate service procedures, remove the
I/O adapter. Install the new replacement storage I/O adapter with
the following parts installed on it:
- The cache directory card from the original storage I/O adapter.
See the figures at Replacing the cache directory card to
identify the relevant locations on the card.
- The removable cache card from the original storage I/O adapter,
if the original storage I/O adapter has a removable cache card. Verify
that the storage I/O adapter is listed in the feature comparison
tables for PCIe and PCI-X cards as
having Yes in the Removable Cache Card column.
Go to Step 3131-11.
Step 3131-6
Identify
the affected disks by examining the hardware error log. The hardware
error log can be viewed as follows:
- Follow the steps in Examining the hardware error log and return here.
- Select the hardware error log to view.
Viewing the hardware
error log, the Device Errors Detected field indicates the total
number of disks which are affected. The Device Errors Logged field
indicates the number of disks for which detailed information is provided.
Under the Original Device heading, the Resource, Vendor/Product
ID, S/N, and World Wide ID are provided for up to
three disks. Additionally, the Original Controller Type, S/N,
and World Wide ID for each of these disks indicates the adapter
to which the disk was last attached when it was operational. Refer
to SAS resource locations to understand how
to locate a disk using the Resource field.
- Go to Step 3131-7.
Step 3131-7
Have
the adapter or disks been physically moved recently?
- No
- Contact your hardware service provider
- Yes
- Go to Step 3131-8
Step 3131-8
Is
the data on the disks needed for this or any other system?
- No
- Go to Step 3131-10
- Yes
- Go to Step 3131-9
Step 3131-9
The
adapter and disks, identified previously, must be reunited so that
the cache data can be written to the disks.
Restore the adapter
and disks back to their original configuration. Once the cache data
is written to the disks and the system is powered off normally, the
adapter and/or disks can be moved to another location.
When the problem is resolved, see the removal and replacement
procedures topic for the system unit on which you are working and
do the "Verifying the repair" procedure.
Step 3131-10
Perform
only one of the following options, listed in the order of preference:
- Option 1
- Reclaim controller cache storage by performing the following steps:
Attention: All data on the disk array will be lost.
- Start the IBM® SAS Disk Array Manager.
- Start AIX diagnostics and
select Task Selection on the Function Selection
display.
- Select .
- Select .
- Confirm to Allow Unknown Data Loss.
- Confirm to proceed.
When the problem is resolved, see the removal and replacement
procedures topic for the system unit on which you are working and
do the "Verifying the repair" procedure.
- Option 2
- If the disks are members of a disk array, delete the disk array
by doing the following steps:
Attention: All data on the
disk array will be lost.
- Start the IBM SAS Disk Array Manager as
follows:
- Start Diagnostics and select Task Selection on
the Function Selection display.
- Select .
- Select .
- Select the disk array to delete.
When the problem is resolved, see the removal and replacement
procedures topic for the system unit on which you are working and
do the "Verifying the repair" procedure.
- Option 3
- Format the disks, as follows:
Attention: All data on
the disk array will be lost.
- Start the IBM SAS Disk Array Manager as
follows:
- Start Diagnostics and select Task Selection on
the Function Selection display.
- Select .
- Select .
When the problem is resolved, see the removal and replacement
procedures topic for the system unit on which you are working and
do the "Verifying the repair" procedure.
Step 3131-12
Was
the new SRN nnnn-9050?
- No
- The new SRN was nnnn-9010.
- Reclaim the controller cache storage as follows:
Attention: Data might be lost. When an auxiliary
cache adapter connected to the RAID controller logs an nnnn -
9055 SRN in the hardware error log, the reclaim process does not result
in lost sectors. Otherwise, the reclaim process does result in lost
sectors.
- Start the IBM SAS Disk Array Manager.
- Start AIX diagnostics and
select Task Selection on the Function Selection
display.
- Select .
- Select .
- Confirm to proceed.
Note: On the Reclaim Controller Cache Storage
results display, the number of lost sectors is displayed. If the number
is 0, there is no data loss. If the number is not 0, data has been
lost and the system operator might want to restore data after this
procedure is completed.
- Go to Step 3131-13
- Yes
- Contact your hardware service provider.
Step 3131-14
Note: Label all
parts (original and new) before moving them.
Using the appropriate
service procedures, remove the 572F/575C card set. Create and install
the new card set that has the following parts installed on it:
- The new 572F storage I/O adapter
- The cache directory card from the new replacement 572F storage
I/O adapter
- The new 575C auxiliary cache adapter
When the problem is resolved, see the removal and replacement
procedures topic for the system unit on which you are working and
do the "Verifying the repair" procedure.
Step 3131-15
Using
the appropriate service procedures, remove the I/O adapter. Install
the new replacement storage I/O adapter with the following parts installed
on it:
- The cache directory card from the new storage I/O adapter. Refer
to Replacing the cache directory card.
- The removable cache card from the new storage I/O adapter. This
only applies to certain adapters which have a removable cache card.
Verify that the storage I/O adapter is listed in the feature comparison
tables for PCI Express® and PCI-X cards as
having Yes in column for Removable Cache Card.
When the problem is resolved, see the removal and replacement
procedures topic for the system unit on which you are working and
do the "Verifying the repair" procedure.
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