Hpdm multipath restrictions, 126 hpdm multipath restrictions – HP 3000 Enterprise Virtual Array User Manual
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Installing the Device Mapper Multipath Enablement Kit
To install the kit, follow the steps described in the Installation and Reference Guide Device Mapper
Multipath Enablement Kit for HP StorageWorks Disk Arrays:
iSCSI Initiator timeout settings for Red Hat 4 and SUSE 9 systems
To define the iSCSI Initiator timeout settings for Red Hat 4 and SUSE 9 systems, move the /etc/
iscsi.conf
file to the Session Timeout Settings section and modify as follows:
ConnFailTimeout=5
iSCSI Initiator timeout settings for Red Hat 5 and SUSE 10 systems
To define the iSCSI Initiator timeout settings for Red Hat 5 and SUSE 10 systems, modify either the /
etc/iscsi/iscsid.conf
or the /etc/iscsid.conf line as follows:
node.session.timeo.replacement_timeout=5
HPDM Multipath restrictions
HPDM Multipath has the following restrictions:
•
HPDM Multipath does not provide an auto-failback feature for devices presented through iSCSI
Initiators. HP recommends running the following commands to recover the failed paths and make
them available for I/O failback (a quiesce of I/O is necessary; a reboot also may be required):
# /etc/init.d/iscsi restart or # /etc/init.d/open-iscsi restart
# /sbin/multipath –v3
•
No clustering support
•
If Device Mapper Multipath is configured on iSCSI devices (on hosts running SLES OS), the system
may hang during reboot. To avoid this, HP highly recommends running the following command
before rebooting the system:
# /sbin/multipath –F
Setting up the iSCSI Initiator for multipathing
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