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DM multipath :iscsi lun shows by diff names on two server where its exported

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Operating Systems Linux Red Hat DM multipath :iscsi lun shows by diff names on two server where its exported
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Old 11-03-2013
DM multipath :iscsi lun shows by diff names on two server where its exported
Hi,

I am trying to setup multipathing (using DM multipath) for a redhat cluster setup ...all setup is done but issue is :

node 1 shows the shared iscsi lun as sdc
node 2 shows the same as sdg (changes on reboots)

Due to this (i guess) i get i/o error & i can not read files created by other node. eg


Code:
[root@rh600 Packages]# cd /var/www/html/
[root@rh600 html]# ls
ls: cannot access index.html: Input/output error
index.html  lost+found  test
[root@rh600 html]#
 
[root@rh500 html]# ls -l
ls: cannot access index.html: Input/output error
total 13
-????????? ? ?    ?        ?            ? index.html
drwxrwxrwx 2 root root 12288 Nov  2 21:32 lost+found
-rw-r--r-- 1 root root     5 Nov  2 21:39 test
[root@rh500 html]#

Anyone knows work-around for this ?

Thanks in advance
Last edited by Scrutinizer; 11-03-2013 at 09:01 AM.. Reason: code tags added
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LEARN ABOUT NETBSD

iscsi-target

ISCSI-TARGET(8) 					    BSD System Manager's Manual 					   ISCSI-TARGET(8)

NAME

     iscsi-target -- service remote iSCSI requests

SYNOPSIS

     iscsi-target [-46DV] [-b block length] [-f configuration file] [-p port number] [-s maximum number of sessions] [-t target name]
		  [-v verbose arg]

DESCRIPTION

     iscsi-target is the server for iSCSI requests from iSCSI initiators.  iscsi-target listens for discovery and login requests on the required
     port, and responds to those requests appropriately.

     Options and operands available for iscsi-target:

     -4      iscsi-target will listen for IPv4 connections, and respond back using IPv4.  This is the default address family.

     -6      iscsi-target will listen for IPv6 connections, and respond back using IPv6.

     -b blocksize
	     Specify the underlying block size for iSCSI storage which will be served.	The possible sizes are: 512, 1024, 2048, and 4096 bytes,
	     with the default being 512 bytes.

     -D      When this option is specified, iscsi-target will not detach itself from the controlling tty, and will not become a daemon.  This can
	     be useful for debugging purposes.

     -f configfile
	     Use the named file as the configuration file.  The default file can be found in /etc/iscsi/targets.  See targets(5) for more informa-
	     tion.

     -p port number
	     Use the port number provided as the argument as the port on which to listen for iSCSI service requests from initiators.

     -s maximum number of sessions
	     Allow the maximum number of sessions to be initiated when connecting to the target.

     -t filename
	     The target name (as it appears to the iSCSI initiator) can be specified using this flag.

     -V      iscsi-target will print the utility name and version number, and the address for bug reports, and then exit.

     -v argument
	     The amount of information shown can be varied by using this command.  Possible values of argument are net to show network-related
	     information, iscsi to show iSCSI protocol-related information, scsi to show SCSI protocol information, and all to show information
	     from all of the above arguments.

FILES

     /etc/iscsi/targets 	the list of exported storage
     /var/run/iscsi-target.pid	the PID of the currently running iscsi-target

SEE ALSO

     targets(5)

HISTORY

     The iscsi-target utility first appeared in NetBSD 4.0.

BSD
								   May 27, 2006 							       BSD