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Questions tagged [multipath]

135 questions
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ESXI 6.0 u2 multipathing configuration with group by prio

Is it possible to change the path grouping policy of ESXI 6.0 multipathing to group_by_priority? In essence I want to work with the grouping priorities given by a SAN storage. I didnt see any specific kind of path grouping policy in the GUI…
BeGa
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Mounting multipath devices by UUID in fstab

I have several multipath iSCSI LUN's formatted as ocfs2 filesystems. They are part of an Ubuntu 14.04 cluster using local heartbeat. This all appears to be working fine if I mount them manually after rebooting. If I try to automatically mount them…
Nathan S. Watson-Haigh
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Multipath Drive Association

So i have an issue were the drive mappings for the servers will not line up even though the configs for them match exactly.. The main problem is the path for the drives keeps switching. foo# multipath -l mpatha (3600507680190014da0000000000002eb)…
user316926
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Linux multipath 1 lun not using all paths other luns OK

A new 50gb lun was added to the rhel5.8 linux server and we did a scan to detect and add. However multipath -ll shows that the 50gb lun is using only 1 path while the old existing luns are on 2 paths. #echo "- - -" >…
joeyski
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Create file system on multipath volume

I'm completely new to linux admin and file system. Recently we acquired an HP MSA P2000 san. I've setup the disk into a vdisk and created 3 volumes on it. On Centos 7, I've also setup the multipath mapper and have those volumes mapped into…
surfcode
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Windows Server 2012R2 Backup

We have deployed Windows Server 2012R2, which by using the Windows Server Backup was backup on the drives connected from SAN. SAN disks connected through multiple paths using Windows Multipath-IO. The problem is that if we try to restore the…
cortes_
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EMC PowerPath or MultiPath?

We are using a SAN for our datastorage. I recently got the SAN connected to a CentOS 5.3 server by using the EMC PowerPath software along with the Navisphere Agent running on CentOS. However I have now recieved the final production server and need…
BinaryMisfit
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Does a dead LUN path cause an increase in I/O times on the remaining LUN path(s)?

We use an EMC SAN appliance. There are 2 'paths' from the cluster to the SAN. Today we experienced that one of the LUN paths was 'dead' (as reported in the windows event logs). Presumably the multipath LUN was down to a single path. At this time…
tresstylez
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9211-8i HBA (IT mode) with Supermicro expander

I have managed to get things to a point that I see all my drives listed with "multipath -l". Now the question is how to add them to a ZFS zpool? All attempts at using dm* naming or /dev/mapper names fail with device busy or already active. I can't…
Mark M
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Number of device listed with multipath -ll

Hope i am not wasting anyone´s time, so apologies to all should that be the case with this question. it is the first time i am playing with multipath, manged to setup multipath on a RHL5, the setup comprises of the following: RHL5 Server has 2 x HBA…
Vlad
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How to make sure RHEL will see multipath disks after a reboot?

We are using RHEL, but unfortunately there are issues with multipathing. It seems not all SAN disks are automatically seen after a reboot. A service multipath reload is required in order for the OS to be able to see the disks. root@test-01 ~]# ls…
ujjain
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Multipath performing very poorly RHEL/HSV200

I'm running a RHEL 5.5 with multipath@HSV200 storage system. The disk performance for write is VERY poor comparing to Windows-system counterparts (which are using the same storage and multipath). Here are the results: mpath17…
Daniel Sartori
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Newly Resized Luns not Showing correct LUN Size RHel 5.3

My linux servers are not showing their newly resized fibre Luns after being extended on the fly(online).the storage guys have successfully resized the LUNS from 1Tb to 2 Tb .We are running fibre SAN ((on HP EVA kit,PSV450) not ISCSI LUNS on RHEL…
Dominiqs
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BGP Multipath & return routes

I'm probably a complete n00b concerning serverfault related questions, but our IT department makes a bold statement I wish to verify. I've searched the internet, but can find nothing related to my question, so I come here. We have Threat Management…
Dennis van der Stelt
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Networking / Multipath dropping

I'm having problem with few linux boxes running xen. They are acting as hypervisors and they are connected to SAN using multipath setup to provide storage to guest vms. Every now and then one of two paths fails but it can be quickly restored by…
user124381
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