IBM AS/400 Repair And Parts

Disk Service Support
Start Disk Service Here
Before exchanging a disk unit, you must attempt
to save customer data.
This procedure will direct you to the correct
recovery procedure to use when attempting to
save customer data.
1 Do you know if your system has storage
protection for the failing disk unit?
Yes No
~ Go to "Determining Storage Pro-
tection Status." Then return to
step 2 of this procedure.
2 Does your system have mirrored protection
for the failing disk unit?
No Yes
~ Go to "Exchanging a Disk Unit with
Mirrored Protection" on page 2-3.
This ends the procedure.
3 Does your system have device parity pro-
tection for the failing disk unit?
No Yes
Go to "Exchanging a Disk Unit with
Device Parity Protection" on
page 2-3.
This ends the procedure.
4 Are you exchanging the disk drive logic
card?
No Yes
~ Exchange the failing FRU (see Disk
Unit in Chapter
1, "Removal and
Installation Procedures" on
page 1-1).
This ends the procedure.
5 You are exchanging the disk unit.
Go to "Disk Unit Data Save and Initialize-
Pump Data to Tape" on page 2-5.
2-2 AS/400 940219404 Models 2xx Repair and Parts
This ends the procedure.
Determining Storage Protection
Status
The customer should know if the system is config-
ured for storage protection and should have kept a
printout of the storage protection configuration in
the binder for the
System Operation information.
If not, perform this procedure.
1 Select the Work with disk units option on
the System Service Tools (SST) display.
If
you cannot get to SST, select the Work
with disk units
option on the Dedicated
Service Tools (DST) display.
2 Select the Display disk configuration option
on the Work with Disk Units display.
3 Select the Display disk configuration status
option on the Work with Disk Configuration
display.
Each auxiliary storage pool (ASP) is listed,
showing the disk units that are members of
the ASP. The
Status column shows one of
the following protection statuses for the
ASP:
Mirrored
Unprotected
Checksummed
Disk units in an ASP with a protection
status of
Mirrored are configured for mir-
rored protection.
Note: In a mirrored ASP, units with a
status of
Suspended are unprotected. (One
of the sub-units is suspended, the other is
unprotected.)
If the failing disk unit has mirrored pro-
tection, write down the status of the failing
disk unit and it's mirrored pair. You will
need this information later in one of the
recovery procedures.
Disk units in an ASP with a protection
status of
Unprotected may be configured as
data parity protected units. Look in the
Status column of the Display disk configura-
tion status
display. Every unit in the ASP

IBM AS/400 Specifications

General

Brand	IBM
Model	AS/400
Category	Network Hardware
Language	English