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Questions tagged [multipath]

135 questions
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iSCSI multipath: should I keep all portals configured, even unreachable ones?

Sometimes when you connect to a multipath'ed iSCSI target you will have access to only some of its portals. This is common when the initiator is directly connected to the target's ethernet ports, as opposed to going though switches. [my actual…
Luke404
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How to get multipath working for Ubuntu Server 12.04

I'm working on a project which aims to make use of Ubuntu servers running on enterprise class hardware. In our case that means IBM HS23E blade servers, QLogic 4GB fibre channel extension cards and quite old IBM DS4500 disk array with two…
mlampi
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Can MySQL use multiple data directories on different physical storage devices

I am running MySQL with its data dir on a 128Gb SSD. I am dealing with large datasets (~20Gb) that are loaded and processed weekly, each stored in a separate DB for the purposes of time point comparisons. Putting all the data into a single database…
sirlark
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How to best tune Dell PowerVault MD3600i SAN/Initiators for best performance?

Recent owner of a Dell PowerVault MD3600i i'm experiencing some weird results. I have a dedicated 24x 10GbE Switch (PowerConnect 8024), setup to jumbo frames 9K. The MD3600 has 2 RAID controllers, each has 2x 10GbE ethernet nics. There's nothing…
Disco
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Add Multipath to Existing Storage - Ubuntu Server

I have an existing Fiber Channel Storage Array - SGI TP9300 (its an LSI product) it's all set up with LUNS and I have a LVM managing it with two Ubuntu 10.04 servers accessing the array. The Servers and the Array support multiple Fibre connections -…
Kylea
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Why does my lvm2 volume group only work with multipath device mapper and not powerpath?

My server is an Oracle Enterprise Linux 5.4 (RHEL5) on an hp blade (x64) with qlogic HBAs connected to an EMC clariion SAN. We are migrating from multipath to powerpath, because emc and the company storage team will not support multipath. Currently…
jwinders
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linux multipath - change device alias safely

I'm running RHEL 5.2 connected to a NetApp over FC. The server is running a database on mpathNN devices that can not be stopped. I need to add a new LUN and give it a specific alias (rather than mpathNN). I know how to set this up in multipath.conf,…
carillonator
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FC multipath says "device busy " when connecting again. SLES 11 - netapp - emulex

I have a weird issue. sles 11 emulex FC netapp fas 2xxx 100G LUN is ok. Multipath enabled, multipathd and device-mapper seem to work properly. multipath -t shows this output of the config => http://pastebin.com/bmEBhdeX When both FC are connected I…
Marc Riera
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Linux / Multipath not using all paths, and won't use queue-length path_selector?

I have the following hardware: 2x SuperMicro servers (128GB RAM, 2x 8 core AMDs) 2x/server LSI SAS2008 PCIe MPT-Fusion2 HBAs (2 SAS ports per card) 1x LSI CTS2600 DAS with 24x W.D. 15.7k RPM 600GB SAS drives. Server is running OpenSuSE 11.4, with…
Kendall
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Merit and demerits for various Linux fiberchannel multipath options

On our Linux servers, we currently use HPs qla2xxx drivers, because it has multipathing (active/passive) built in. The are, however, various other options, like Red Hats device-mapper-multipath with the stock qla2xxx drivers (multibus and failover)…
wzzrd
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Good NFS multipath solution

I have a couple of servers serving exactly the same content through NFS to several webfarms, all the servers involved are running CentOS 5 The content between both NFS servers is replicated using Unison (tried drbd in the past, killed the…
lynxman
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ZFS and SAN: issue with data scrubbing

Working as scientists in a corporate environment, we are provided with storage resources from a SAN within an Ubuntu 20.04 virtual machine (Proxmox). The SAN controller is passed directly to the VM (PCIe passthrough). The SAN itself uses hardware…
Benoit
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iSCSI Multipath to block device on zfs pool in ubuntu

I have succesfuly set up zfs pool, created block on it , and created iscsi target. The target is visible from esx host and i can us it as datastore. steps i did: zpool create tank raidz2 sdb sdc sdd raidz2 sde sdf sdg zfs create -o compression=off…
Kriss
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Does changing vmware datastore multipathing policy disrupt connectivity

We have several VMware ESXi hosts accessing multiple datastore stored on a fiber channel SAN. We have found that some of the hosts are still set to "Most recently used" mode for their multipathing policy. I would like to change these remaining hosts…
James Edmonds
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open-iscsi initiator on linux does not see the passive side of an active/passive open-e target

I have a Linux server running SLES11 SP4 which uses open-iscsi and multipathing to connect to a LUN that is presented from an Open-E DSS v7 storage cluster with active/passive failover. The Linux server db03 has its interface bond0 with the IP…
MoepMan
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