Package: multipath-tools
Version: 0.4.8+git0.761c66f-7
Severity: normal
doing repeated "switch multipath group" commands leaves a multipath in
a strange state with both paths "enabled".
multipathd> show multipath 35000c50012b1450f topology
35000c50012b1450f dm-25 SEAGATE,ST373455SS
size=68G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=1 status=active
| `- 3:0:24:0 sdy 65:128 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 4:0:24:0 sdbc 67:96 active ready running
Ok, all I/O is going to /dev/sdy, the "active" path.
multipathd> switch multipath 35000c50012b1450f group 2
ok
Now I/O is going to /dev/sdbc, but:
multipathd> show multipath 35000c50012b1450f topology
35000c50012b1450f dm-25 SEAGATE,ST373455SS
size=68G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=1 status=enabled
| `- 3:0:24:0 sdy 65:128 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 4:0:24:0 sdbc 67:96 active ready running
Both paths are shown enabled. Which is active?
multipath gets it right:
# multipath -l 35000c50012b1450f
35000c50012b1450f dm-25 SEAGATE,ST373455SS
size=68G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=-1 status=enabled
| `- 3:0:24:0 sdy 65:128 active undef running
`-+- policy='round-robin 0' prio=-1 status=active
`- 4:0:24:0 sdbc 67:96 active undef running
-- Package-specific info:
/etc/multipath.conf does not exist.
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages multipath-tools depends on:
ii initscripts 2.87dsf-8.1 scripts for initializing and shutt
ii kpartx 0.4.8+git0.761c66f-7 create device mappings for partiti
ii libaio1 0.3.107-7Linux kernel AIO access library -
ii libc6 2.10.2-6 Embedded GNU C Library: Shared lib
ii libdevmapper1.02.1 2:1.02.39-1 The Linux Kernel Device Mapper use
ii libncurses5 5.7+20090803-2 shared libraries for terminal hand
ii libreadline66.1-1GNU readline and history libraries
ii lsb-base3.2-23 Linux Standard Base 3.2 init scrip
ii udev151-2/dev/ and hotplug management daemo
multipath-tools recommends no packages.
Versions of packages multipath-tools suggests:
pn multipath-tools-boot (no description available)
-- no debconf information
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