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CHAPTER 4 PCI Card Hot Maintenance in Red Hat Enterprise Linux 6
4.7 Hot Addition of PCI Express cards
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C122-E175-01EN
g Use the iscsiadm command to confirm that the target session has been activated.
Example which confirms the state of session after connecting
# /sbin/iscsiadm -m session
tcp: [1] 192.168.1.64:3260,1 iqn.2000-
09.com.fujitsu:storage-system.eternus-
dx400:00001049.cm0ca0p0
tcp: [3] 192.168.2.66:3260,3 iqn.2000-
09.com.fujitsu:storage-system.eternus-
dx400:00001049.cm1ca0p0
h You can confirm the activation of sessions on multipath products using DM-MP or ETERNUS
multidriver.
*1: Write down the DM-MP display contents at the session activation.
Example of DM-MP display before connecting path
# /sbin/multipath -ll
mpath1 (36000b5d0006a0000006a104900000000) dm-0
FUJITSU,ETERNUS_DX400
[size=50G][features=0][hwhandler=0][rw]
¥_ round-robin 0 [prio=1][active]
¥_ 3:0:0:0 sdb 8:16 [active][ready]
Example of DM-MP display after connecting path
# /sbin/multipath -ll
mpath1 (36000b5d0006a0000006a104900000000) dm-0
FUJITSU,ETERNUS_DX400
[size=50G][features=0][hwhandler=0][rw]
¥_ round-robin 0 [prio=2][enabled]
¥_ 3:0:0:0 sdb 8:16 [active][ready]
¥_ 5:0:0:0 sdc 8:32 [active][ready]
*2: See the ETERNUS Multipath Driver User's Guide (For Linux).
4.7 Hot Addition of PCI Express cards
This section describes the PCI Express card addition procedure with the PCI Hot Plug function.
The procedure includes common steps for all PCI Express cards and the additional steps required for a
specific card function or driver.
Thus, the descriptions cover both the common operations required for all cards (e.g., power supply
operations) and the specific procedures required for certain types of card. For details on addition of the cards
not described in this section, see the respective product manuals.
There are two ways to perform PCI hot plug:
- Operation by using sysfs
- Operation by using dp commands
You can perform the operation by using dp commands if Dynamic Reconfiguration utility is installed in the
partition. If not, be sure to use the operation by using sysfs. Although you can perform the operation by using
sysfs even if Dynamic Reconfiguration utility is installed in the partition, it is recommended to perform the
operation by using dp commands to prevent wrong operation.
Hereafter, description about the operation by using dp commands starts at ‘For the partition with Dynamic
Reconfiguration utility installed’ and description about the operation by sysfs starts at ‘For the partition without
Dynamic Reconfiguration utility installed’.
Notes
If you hot add PCI Express cards into an IOU, see ‘4.4 Hot add of IOU’.
4.7.1 Common addition procedures for all PCI Express cards
1. Performing the required operating system and software operations depending on the PCI card type
2. Confirming that the PCI Express slot power is off
3. Adding a PCI card
This step is performed by the field engineer in charge of your system.