Package: multipath-tools
Version: 0.4.8+git0.761c66f-8
Severity: normal
Hi
I had some problems with an HP EVA 3k Storage Array ( HSV100 Controller ) and
multipath...
Modprobing the HBA module (qla2xxx) resulted in detecting the SAN-Disks as
/dev/sdX , but the device-mapper did not show any new devices.
Looking at /var/log/syslog and dmesg I found multiple entries like this:
device-mapper: table: 253:3: multipath: unknown hardware handler type
device-mapper: ioctl: error adding target to table
device-mapper: table: 253:3: multipath: unknown hardware handler type
device-mapper: ioctl: error adding target to table
device-mapper: table: 253:3: multipath: unknown hardware handler type
device-mapper: ioctl: error adding target to table
device-mapper: table: 253:3: multipath: unknown hardware handler type
device-mapper: ioctl: error adding target to table
Looking at multipathd:
> multipathd -k"show config" | grep hardware_handler | grep hp
hardware_handler "1 hp-sw"
hardware_handler "1 hp-sw"
After some internet searching i found out that between 2.6.26 ( lenny ) and
2.6.32 the hardware handler kernel modules were transferred from drivers/md to
drivers/scsi/device_handler.
In the source of the new mopdule drivers/scsi/device_handler/scsi_dh_hp_sw.c
there's the name hp_sw ...
Apparently the name of my handler changed from hp-sw to hp_sw.
After adding a modified device-Section in my /etc/multipath.conf ( see below )
and a restart of multipathd everything works fine.
The problem is solved for me, but i recommend correcting the handler-names in
the default config in libmultipath from
..hwhandler = "1 hp-sw"
to
..hwhandler = "1 hp_sw"
thanks, phil
-- Package-specific info:
Contents of /etc/multipath.conf:
multipaths {
....
}
devices {
device {
vendor "(COMPAQ|HP)"
product "(MSA|HSV)1.0.*"
path_grouping_policy group_by_prio
path_checker hp_sw
checker hp_sw
features "1 queue_if_no_path"
hardware_handler "1 hp_sw"
prio hp_sw
no_path_retry 12
rr_min_io 100
}
}
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=de_CH, LC_CTYPE=de_CH (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/bash
Versions of packages multipath-tools depends on:
ii initscripts 2.88dsf-9 scripts for initializing and shutt
ii kpartx 0.4.8+git0.761c66f-8 create device mappings for partiti
ii libaio1 0.3.107-7 Linux kernel AIO access library -
ii libc6 2.11.1-3 Embedded GNU C Library: Shared lib
ii libdevmapper1.02.1 2:1.02.48-2 The Linux Kernel Device Mapper use
ii libncurses5 5.7+20100313-2 shared libraries for terminal hand
ii libreadline6 6.1-3 GNU readline and history libraries
ii lsb-base 3.2-23.1 Linux Standard Base 3.2 init scrip
ii udev 157-1 /dev/ and hotplug management daemo
multipath-tools recommends no packages.
Versions of packages multipath-tools suggests:
ii multipath-tools-boo 0.4.8+git0.761c66f-8 Support booting from multipath dev
-- no debconf information
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