Chapter 3 Multipath Driver Functions and Operation
3.6 Multipath Recovery
FUJITSU Storage ETERNUS Multipath Driver V2 User’s Guide for Linux
Copyright 2014 FUJITSU LIMITED
P2U3-0031-15ENZ0
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3.5.2
"iompadm restart" Command
Use the "iompadm restart" command to reinstate the active/standby status.
[Command format]
When "adapter" is specified as the change unit, the following is also available:
[Function overview]
This command is used to tidy up after hardware hot replacement. It recovers all paths that use the target
hardware (specified by change unit, disk device node, and port number). If a change unit is not specified,
the process is performed as if "controller" had been specified. Disk device node and port number can be
checked from the output result of the "iompadm info" command.
This command changes a fail, fatal fail or stop status path to active/standby. To change a warning status
path to active/standby, change its status to stop status using the "iompadm change" command, and then
use the "iompadm restart" command.
[Example]
[Change unit specification]
"3.5.1 "iompadm change" Command" (page 51)
.
3.6
Multipath Recovery
Perform the following procedure to recover from a path failure in a multipath configuration by using the
"iompadm" command.
Procedure
1
Use the "iompadm info" command to identify the failed path.
2
Perform the necessary maintenance (change HBAs, cables, CAs, etc.) on the failed path.
3
Use the "iompadm restart" command to switch the recovered path back to an active/standby
status.
End of procedure
For details on using the "iompadm restart" command, refer to
"3.5.2 "iompadm restart" Command" (page 52)
.
iompadm restart [change_unit] disk_device_node port_number
iompadm restart adapter PCI_bus_number
# /opt/FJSVmpd/bin/iompadm restart controller /dev/sdb 30
Reboot the server when the "iompadm restart" command is executed for a path for which "I/O rejection" is
displayed as the "iompadm info" result but this path fails to recover.
