Qlogic iSR6200, Руководство пользователя программного обеспечения

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A–Configuring the Data Path Through iSR6200 for Online Data Migration
Linux Multipath Configuration
A-6 ISR654608-00 B
Table A-5. Configuring Hitachi Dynamic Link Manager on Linux
OS Linux: RHEL 4 and 5, SLES 10 and 11
Multipathing software Hitachi Dynamic Link Manager (HDLM)
Multipath installation
verification To check the multipath status of the disks, issue the
dlnkmgr
view -path
command.
Validations During Router Insertion Process
Removing first direct path from
controller port (for example,
Port A) The path status for the path belonging to the zoned-out controller
port (for example, Port A) is shown as “failed” in the HDLM on the
host.
Adding router path for the
removed controller port.(for
example, Port A ) The host initiator port is seen as online and logged in on the router
CLI and SANsurfer iSCSI/FC Router Manager. The newly-added
path appears online and active on the host in HDLM. Depending
upon the policy settings, part of the host IO may start flowing
through the path presented by the router.
1. To verify, run the
show perf byte
command on the router to
view the traffic flowing through the router ports.
2. To rescan the new path through the router, issue the following
command:
# echo "- - -" > /sys/class/scsi_host/host2/scan;
# echo "- - -" > /sys/class/scsi_host/host2/scan;
3. Issue the following HDLM-related command:
dlmcfgmgr -rdlmcfgmgr -v dlnkmgr view -path
Removing second direct path
from controller port (for exam-
ple, Port B) The path status for the path belonging to the zoned-out controller
port ((for example, Port B) is shown as online and offline in the
dlnkmgr view -path
command output on the host. The entire
host I/O now has to flow through the router. Verify that the
show
perf byte
command shows I/O flowing through the router.
Adding router path for the
removed controller port.(for
example, Port B) The host initiator port is seen as online and logged in on the router
CLI and SANsurfer iSCSI/FC Router Manager. The newly-added
path appears on the host in the
dlmcfgmgr -v
output. Depending
on the policy settings, part of the host I/O may start flowing the new
path presented by the router. To rescan the new path, issue the
dlmcfgmgr -r
command.