05-31-2016
What do you call multipath? Are you talking of PVs seen by HBAs ?
10 More Discussions You Might Find Interesting
1. Solaris
Hello everybody...
I have a Server conected to a Disk Array through 2 canals of FiberChannel... I've installed RedHat Advance Server 3 and of course i see two device files that refer the same disk: for example: /dev/sda and /dev/sdb are refered to the same Lun... This is the same case for a new... (2 Replies)
Discussion started by: lenux78
2 Replies
2. UNIX for Dummies Questions & Answers
Hi..
when i delete a Lun from a Array on a SAN, and again when i create a Lun it shows that the newly created Lun has the ID of the Old deleted Lun which is leading to data corruption. All this is handled by the Multipath software. can anybody help. (0 Replies)
Discussion started by: Praveen13
0 Replies
3. Red Hat
I don't undestand how to combine 4 nics in order to use DM Multipath. Do I have to install each nic with its IP address? If yes, do I need a group IP address? This concept is not clear for me.
The connection beetwen the server (DELL Poweredge T710) and the SAN through iscsi works well, I used... (1 Reply)
Discussion started by: gnupinux
1 Replies
4. Red Hat
Hi All,
When I execute multipath -ll command that time display only 3 path (mpath1,mpath2 and mpath5), not display other 2 path (mpath3 and mpath4). I have configure 5 path in /etc/multipath.conf file. What is the reason behind it. Please help me.
Please find below the output :
... (5 Replies)
Discussion started by: mnmonu
5 Replies
5. Red Hat
Hi All,
When I execute "multipath -ll" command that time display only 3 path (orafra2,oradata2 and oradata1), not display other 2 path (orafra1 and data1). I have configure 5 path in "/etc/multipath.conf" file. What is the reason behind it. Please help me.
Please find below some output for... (4 Replies)
Discussion started by: mnmonu
4 Replies
6. Ubuntu
Hello,
i have a problem with the multipath tools configuration.
i can't remove the local disk paths.
the multipath.conf archives configuration is:
---------------------------------------------------------
$ cat /etc/multipath.conf
blacklist{
devnode cciss
devnode fd
... (0 Replies)
Discussion started by: FeeII
0 Replies
7. Red Hat
hi,
I've a question about multipath.
One server uses this configuration:
mpath02 (3600d000ff0d510cae5b8df4d01000000) dm-2 FSC,FibraCAT_SX
\_ round-robin 0
\_ 0:0:3:2 sdq 8:64
\_ round-robin 0
\_ 1:0:2:2 sdw 8:160
\_ round-robin 0
\_ 1:0:5:2 sde 65:16
\_ round-robin... (0 Replies)
Discussion started by: davyp74
0 Replies
8. Red Hat
Hi,
I am running RHEL6 on a physical node (HP Proliant).
If it normal for the root device to get listed in the "multipath -ll" output? (Listed below as dm-4, HP LOGICAL VOLUME).
i.e.
asm-data (360a98000424a414b453f443548503644) dm-3 NETAPP,LUN
size=768G features='4 queue_if_no_path... (0 Replies)
Discussion started by: Duffs22
0 Replies
9. UNIX for Advanced & Expert Users
Hi,
I have a RAC installation on 2 solaris 11 nodes. (With ASM)
Disks' mpath are managed by EMC Powerpath on both nodes.
I want to migrate mpath software to Solaris multipath without downtime.
My plan is first migrate node1 to solaris mpath, then after some days migrate node2 to sol.mpath.
My... (5 Replies)
Discussion started by: vlkkck
5 Replies
10. Red Hat
Hi,
In a RHEL 5 box, I have just added new multipath configurations in /etc/multipath.conf :
blacklist_exceptions {
wwid "360002ac0000000000000008e0001ee00"
wwid "360002ac0000000000000008f0001ee00"
wwid "360002ac000000000000000900001ee00"
wwid... (0 Replies)
Discussion started by: anaigini45
0 Replies
LEARN ABOUT CENTOS
mpathconf
MPATHCONF(8) Linux Administrator's Manual MPATHCONF(8)
NAME
mpathconf - A tool for configuring device-mapper-multipath
SYNOPSIS
mpathconf [commands] [options]
DESCRIPTION
mpathconf is a utility that creates or modifies /etc/multipath.conf. It can enable or disable multipathing and configure some common
options. mpathconf can also load the dm_multipath module, start and stop the multipathd daemon, and configure the multipathd service to
start automatically or not. If mpathconf is called with no commands, it will display the current configuration.
The default options for mpathconf are --with_module The --with_multipathd option is not set by default. Enabling multipathing will load
the dm_multipath module but it will not immediately start it. This is so that users can manually edit their config file if necessary,
before starting multipathd.
If /etc/multipath.conf already exists, mpathconf will edit it. If it does not exist, mpathconf will use /usr/share/doc/device-mapper-multi-
path-0.4.9/multipath.conf as the starting file. This file has user_friendly_names set. If this file does not exist, mpathconf will create
/etc/multipath.conf from scratch. For most users, this means that user_friendly_names will be set by default, unless they use the
--user_friendly_names n command.
COMMANDS
--enable
Removes any line that blacklists all device nodes from the /etc/multipath.conf blacklist section.
--disable
Adds a line that blacklists all device nodes to the /etc/multipath.conf blacklist section. If no blacklist section exists, it will
create one.
--user_friendly_name { y | n }
If set to y, this adds the line user_friendly_names yes to the /etc/multipath.conf defaults section. If set to n, this removes the
line, if present. This command can be used along with any other command.
--find_multipaths { y | n }
If set to y, this adds the line find_multipaths yes to the /etc/multipath.conf defaults section. If set to n, this removes the line,
if present. This command can be used aldong with any other command.
OPTIONS
--with_module { y | n }
If set to y, this runs modprobe dm_multipath to install the multipath modules. This option only works with the --enable command.
This option is set to y by default.
--with_multipathd { y | n }
If set to y, this runs service multipathd start to start the multipathd daemon on --enable, service multipathd stop to stop the mul-
tipathd daemon on --disable, and service multipathd reload to reconfigure multipathd on --user_frindly_names and --find_multipaths.
This option is set to n by default.
FILES
/etc/multipath.conf
SEE ALSO
multipath.conf(5), modprobe(8), multipath(8), multipathd(8), service(8),
AUTHOR
Benjamin Marzinski <bmarzins@redhat.com>
June 2010 MPATHCONF(8)