IBM Application System/400 Service Information page 146

Advanced Backup and Recovery Guide.
The data in the system ASP is assem-
bled again during the next IPL to the
OS/400 program.
• If the system ASP does not have
checksum protection, have the cus-
tomer see "Recovering from Disk Unit
Media Failures" in the "Working with
Disk Recovery" chapter of the Basic
Backup and Recovery Guide. The
operating system (OS/400 Licensed
Program) and all customer data must
be restored.
• If the disk unit is in a user ASP (ASP 2
through ASP 16) and the user ASP has
checksum protection, the data in the
user ASP is assembled again during
the next IPL to the OS/400 program.
• If the disk unit is in a user ASP (ASP 2
through ASP 16) and the user ASP
does not have checksum protection,
some data in the ASP may be lost.
See "Recovering from a Disk Media
Failure in a User ASP" under "Recov-
ering from Disk Unit Media Failures" in
the "Working with Disk Recovery"
chapter of the Basic Backup and
Recovery Guide.
This ends the procedure.
17
The remaining steps of this procedure
require a dedicated system.
Have the customer do a normal power-off
procedure of the system.
18
Perform an initial program load (IPL) to
dedicated service tools (DST) by doing the
following:
a. Power off the system if it is powered on
(see "Power off' on page 5-2).
b. Select IPL Type A and Mode M (see
"Selecting IPL and Mode" on
page 5-2).
c. Power on the system (see "Power on"
on page 5-2).
Is either the IPL or Install the System
display shown or is DST available?
Yes No
~
Go to step 2 of this procedure.
5-10
AS/400 9401 Service Information
19
Select the Use dedicated service tools
(DST) option from the display or by using a
function key. You need the customer pass-
word to get to the Use Dedicated Service
Tools (DST) display.
20
Perform the following:
21
a. On the Use Dedicated Service Tools
(DST) display, select the Work with disk
units option.
b. Select the Work with disk configuration
option.
c. Select the Display disk configuration
option.
d. Select the Display disk configuration
status option.
e. Record the ASP, unit, serial number,
type, and address of the disk unit.
f. On the Display Disk Configuration
Status display, ensure that:
• The disk unit is not the load-source
disk unit (disk unit 1).
• There are no disk units that are
missing from the configuration.
Note: A missing unit is indicated
by an asterisk (*) next to the unit
number.
• The status field of the disk unit to
be removed shows Configured.
Are all these conditions true?
Yes No
~
You cannot use the Remove Units
from Configuration function.
Go to step 2 of this procedure.
Perform the following:
a. Return to the Display Disk Configura-
tion display.
b. Select the Display disk configuration
capacity option.
Does the % Used field for the disk unit to
be removed show an asterisk (*)?
No Yes
You cannot use the Remove Units
from Configuration function.
Go to step 4 of this procedure.