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CHAPTER 4 PCI Card Hot Maintenance in Red Hat Enterprise Linux 6
4.3 Hot replacement of IOU
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C122-E175-01EN
system.eternus-dx400:00001049.cm1ca0p0 -p 192.168.2.66:3260
–logout
c Use the iscsiadm command to confirm that the target session has been disconnected.
Example which confirms the state of session after disconnecting
# /sbin/iscsiadm -m session
tcp: [1] 192.168.1.64:3260,1 iqn.2000-
09.com.fujitsu:storage-system.eternus-
dx400:00001049.cm0ca0p0
d You can confirm the disconnection of sessions on multipath products using DM-MP or ETERNUS
multidriver.
*1: Write down the DM-MP display contents at the session disconnection.
Example of DM-MP display before disconnecting path
# /sbin/multipath -ll
mpath1 (36000b5d0006a0000006a104900000000) dm-0
FUJITSU,ETERNUS_DX400
[size=50G][features=0][hwhandler=0][rw]
¥_ round-robin 0 [prio=2][active]
¥_ 3:0:0:0 sdb 8:16 [active][ready]
¥_ 4:0:0:0 sdc 8:32 [active][ready]
Example of DM-MP display after disconnecting path
# /sbin/multipath -ll
mpath1 (36000b5d0006a0000006a104900000000) dm-0
FUJITSU,ETERNUS_DX400
[size=50G][features=0][hwhandler=0][rw]
¥_ round-robin 0 [prio=1][enabled]
¥_ 3:0:0:0 sdb 8:16 [active][ready]
*2: See the ETERNUS Multipath Driver User's Guide (For Linux).
FC card
1. Stop the access to FC card on IOU by such a way as stopping application.
4.3.2 DR operation of IOU hot replacement
This section describes the DR operation for IOU hot replacement.
1. Execute “/opt/FJSVdp-util/sbin/dp rm IOU” command on the shell of OS.
The IOU to be removed will turn off.
Example: Turning off the IOU 3
# /opt/FJSVdp-util/sbin/dp rm IOU3
2. Login to MMB console as administrator
3. Execute “hotremove” command on MMB console.
Example: removing IOU 3 from partition 1
# hotremove partition 1 IOU 3 quiet
#
4. Pulling the IOU out from the slot of cabinet
For replacing IOU itself, insert PCI Express card mounted on old IOU to new one.
For replacing, expanding or removing PCI Express card on the IOU, do it now.
5. Inserting IOU to the slot of the cabinet.
6. Execute “hotadd” command on MMB console.
Example: Adding IOU 3 to partition 1
# hotadd partition 1 IOU 3 quiet
#
7. Execute “/opt/FJSVdp-util/sbin/dp stat IOU” command
A list of IOU included in the partition is shown. Check that added IOU is shown.
Example: adding IOU 3