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Full Discussion: device-mapper-multipath path [undef]
Operating Systems Linux Red Hat device-mapper-multipath path [undef] Post 302377089 by chilonnb on Thursday 3rd of December 2009 06:04:34 AM
Old 12-03-2009
probleme multipath
bonjour,
j'ai deux serveur SUN equipé par RHEL5.2 x86_64 :
SRV1 : 01FC mono + 01FC mono (qlogic)
SRV2 : 01FC dual (qlogic)

ça fonctionnait correctement et après une certaine période J'ai eu un problème lors du démarrage de SRV2.


udevd-event[3580]: wait_for_sysfs: waiting for '/sys/devices/pci0000:00/0000:00:0d.0/0000:04:00.0/host3/target3:0:0/3:0:0:0/ioerr_cnt' failed

Le fstab est correct sur SRV2:
/dev/dm-2 /data auto defaults 1 2
/dev/dm-3 /home auto defaults 1 2

Une fois SRV2 est démarrer, le /home est vide. Il faut que je fais mount /dev/dm-3 /home (ça se monte pas automatiquement)

Je trouve une différence entre SRV1 et SRV2 lorsque je fais : multipath -ll -v2

SRV1 :
mpath2 (3600a0b80004946b80000083b4a4a0137) dm-3 SUN,LCSM100_F
[size=305G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
\_ 1:0:0:1 sdf 8:80 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 2:0:0:1 sdd 8:48 [active][ghost]
mpath1 (3600a0b8000493fb6000008674a4a0130) dm-2 SUN,LCSM100_F
[size=240G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
\_ 2:0:0:0 sdc 8:32 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 1:0:0:0 sdb 8:16 [active][ghost]

SRV2 :
mpath17 (3600a0b80004946b80000083b4a4a0137) dm-2 SUN,LCSM100_F
[size=305G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
\_ 3:0:0:1 sdd 8:48 [active][ready]
mpath16 (3600a0b8000493fb6000008674a4a0130) dm-3 SUN,LCSM100_F
[size=240G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=0][active]
\_ 3:0:0:0 sdc 8:32 [active][ghost]

c'est un problème de paths.



comment je peux résoudre ça.


Merci d'avance.
zeus2_old_multipath.doc (547.5 KB) 
 

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LEARN ABOUT DEBIAN

ifenslave-2.6

IFENSLAVE(8)						    BSD System Manager's Manual 					      IFENSLAVE(8)

NAME

     ifenslave -- Attach and detach slave network devices to a bonding device.

SYNOPSIS

     ifenslave [-acdfhuvV] [--all-interfaces] [--change-active] [--detach] [--force] [--help] [--usage] [--verbose] [--version] master slave ...

DESCRIPTION

     ifenslave is a tool to attach and detach slave network devices to a bonding device.  A bonding device will act like a normal Ethernet network
     device to the kernel, but will send out the packets via the slave devices using a simple round-robin scheduler.  This allows for simple load-
     balancing, identical to "channel bonding" or "trunking" techniques used in switches.

     The kernel must have support for bonding devices for ifenslave to be useful.

OPTIONS

     -a, --all-interfaces
	     Show information about all interfaces.

     -c, --change-active
	     Change active slave.

     -d, --detach
	     Removes slave interfaces from the bonding device.

     -f, --force
	     Force actions to be taken if one of the specified interfaces appears not to belong to an Ethernet device.

     -h, --help
	     Display a help message and exit.

     -u, --usage
	     Show usage information and exit.

     -v, --verbose
	     Print warning and debug messages.

     -V, --version
	     Show version information and exit.
     If not options are given, the default action will be to enslave interfaces.

EXAMPLE

     The following example shows how to setup a bonding device and enslave two real Ethernet devices to it:

     # modprobe bonding
     # ifconfig bond0 192.168.0.1 netmask 255.255.0.0
     # ifenslave bond0 eth0 eth1

AUTHOR

     ifenslave was originally written by Donald Becker <becker@cesdis.gsfc.nasa.gov>, and has since been updated by various kernel developers.

     This manual page was written by Guus Sliepen <guus@debian.org> for the Debian GNU/Linux system.

Debian GNU/Linux						   June 1, 2019 						  Debian GNU/Linux
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