About this task
Important:
Be aware of the following items when you are removing an expansion unit:
v
Concurrent I/O expansion unit removal is supported only for 12X-attached I/O expansion units.
v
Concurrent I/O expansion unit removal is supported only on systems that are managed by a
Hardware Management Console (HMC).
v
An I/O expansion unit can be concurrently removed from a system using these procedures and then
later added back to the system configuration either concurrently or nonconcurrently. When the
expansion unit is added back to the configuration, it is assigned new bus numbers.
v
Concurrent removal of I/O expansion units must be done one expansion unit at a time. If multiple
expansion units are to be removed concurrently, the procedure must be done separately for each one.
To remove an I/O expansion unit from the system configuration, complete the following steps:
Procedure
1.
Verify the existing 12X configuration. For details, see “Verifying the 12X loops with an HMC or
SDMC” on page 21. If problems exist with the 12X configuration, they must be corrected before
continuing with the expansion unit removal procedure.
2.
Verify the existing system power control network (SPCN) configuration by using the Advanced
System Management Interface (ASMI). For details, see “Verifying the system power control network”
on page 22. If problems exist with the SPCN configuration, they must be corrected before continuing
with the expansion unit removal procedure.
3.
Optional: Identify the expansion unit that you want to remove. Select the
Operations
>
LED Status
>
Identify LED
task for the managed system from which the expansion unit is being removed in
order to activate and deactivate identify indicators.
4.
Select from the following options:
v
If the system is not in manufacturing default configuration (MDC), continue with step 5
v
If the system is in manufacturing default configuration (MDC), continue with step 7.
5.
If the system is not in manufacturing default configuration (MDC), use one of the following methods
to ensure that none of the I/O resources in the expansion unit to be removed are owned by active
partitions:
v
Use dynamic logical partitioning to dynamically remove I/O resources in the expansion unit that
are owned by active partitions.
v
Power off logical partitions that own I/O resources in the expansion unit.
6.
If the system is not in manufacturing default configuration (MDC), remove all I/O resources in the
expansion unit to be removed from logical partition profiles.
Note:
Failure to complete this step can result in messages when a profile is activated or edited that
includes resources in an expansion unit that was removed. When such a profile is activated or
edited, the HMC presents a message about missing resources. At that time, the option to have the
HMC automatically remove the missing resources from the profile is given.
7.
Power off the expansion unit that is to be removed by performing the following steps:
a.
Select
the managed system
,
Serviceability
>
Hardware
>
Power On/Off Unit
.
b.
In the Power On/Off Unit window, expand the managed system and select the expansion unit
that is to be removed.
c.
Click
Power Off
, and follow the instructions on the HMC until the expansion unit is powered
off.
8.
Remove ac power from the expansion unit that is to be removed by disconnecting the ac cables from
the power supplies on the expansion unit.
9.
Familiarize yourself with the SPCN cabling rules. For SPCN cabling examples, see “Examples: SPCN
connections” on page 19.
36
Enclosures and expansion units
Summary of Contents for Escala Power7 Series
Page 1: ...Enclosures and expansion units ESCALA Power7 REFERENCE 86 A1 23FF 07 ...
Page 2: ......
Page 88: ...76 Enclosures and expansion units ...
Page 146: ...134 Enclosures and expansion units ...
Page 147: ......
Page 148: ...Printed in USA ...
