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CHAPTER 4 PCI Card Hot Maintenance in Red Hat Enterprise Linux 6
4.5 IOU hot remove
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C122-E175-01EN
4.5 IOU hot remove
The description of the flow of the preparation is as follows.
Note
- If iSCSI (NIC) is mounted on an IOU, hot replacement of the IOU can be performed only if all of below
conditions are satisfied.
- DM-MP (Device-Mapper Multipath) or ETERNUS multi driver (EMPD) is used for storage connection.
- Multiple path is made with a NIC on the IOU to be replaced and a NIC on an IOU other than the IOU to
be replaced.
- A NIC on the IOU to be replaced makes an interface independently.
Example of single interface:
- If FC card used for SAN boot is mounted on an IOU to be replaced, hot replacement of the IOU
cannot be performed.
4.5.1 Preparation for IOU hot remove
The description of the flow of the preparation is as follows.
Note
When the disk connected via the IOU to be removed is used as the dump saving area if kdump, the dump
environment is changed to enable the use of another disk.
1. When the IOU is removed, the PCI Express card, which is mounted on the IOU is also removed. Confirm
that there is no software where the PCI Express card is used, and implement any of the following
measures.
a. Before removing, stop the software in which the PCI Express card to be removed is being used.
b. The PCI Express card is to be outside the software operation target.
To confirm the resources mounted on the target IOU, execute /opt/FJSVdp-util/sbin/dp show IOU
command from the operating system shell.
Example：When checking IOU3.
# /opt/FJSVdp-util/sbin/dp show IOU3
0000:82:00.0 PCI bridge: PLX Technology, Inc. Device 8748
(rev ca)
0000:83:09.0 PCI bridge: PLX Technology, Inc. Device 8748
(rev ca)
0000:84:00.0 PCI bridge: PLX Technology, Inc. Device 8748
(rev ca)
0000:85:02.0 PCI bridge: PLX Technology, Inc. Device 8748
(rev ca)
0000:85:08.0 PCI bridge: PLX Technology, Inc. Device 8748
(rev ca)
0000:85:09.0 PCI bridge: PLX Technology, Inc. Device 8748
(rev ca)
0000:85:10.0 PCI bridge: PLX Technology, Inc. Device 8748
(rev ca)
0000:85:11.0 PCI bridge: PLX Technology, Inc. Device 8748
(rev ca)