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Questions tagged [multipath]

135 questions
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How do I set up the default route on a Linux router with dual ISP links?

So, here's the situation. I have dual ISP links currently active and working for routing traffic from my network, with a very similar iptables setup to the accepted answer at Load balancing & NAT-ing multiple ISP connections on Linux I've got two…
clee
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Multipath path groups

For native RHEL multipathing, what is the difference between having 2 paths in a single path group as opposed to 2 path groups (with same priority) containing 1 path each? Is one preferable to the other? Two paths in single path group # multipath…
kernelpanic
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Failure connecting to Dell MD3200i from XenServer 6.2 pool

This question also asked at Citrix Forums http://forums.citrix.com/thread.jspa?threadID=332289 I have a MD3200i that is currently working fine with my Xen5.6 pool, but I cannot get a connection to the new 6.2 pool to work. I previously had a problem…
Tom Sparrow
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How to configure multipath using Intel X520-SR2 10GB on Oracle Linux 6.2?

I've installed the Intel x520-sr2 Ethernet/Fibre card into a server that has Oracle Linux 6.2 Installed on it. When I boot the server I can go into a QLogic menu (screen has something for Intel on copyrights so I believe this is the correct card…
George Horlacher
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RHEL 5 How to set mount location of multipath device?

I have a RHEL5 + 3Par FC SAN storage environment and am unsure how to setup a multipathed FC device to mount to particular location like /data. I have the 3Par Implementation guide for RHEL and it still doesn't make sense to me. I'm following the…
Chad
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fsck.ext3: Device or resource busy on server with RAID after power outage

I am recovering Dell Poweredge R510 server running Scientific Linux 5.5 after an unexpected power outage. The server was set up by our previous system administrator (I'm a grad student). Upon reboot, I see the message: fsck.ext3: Device or resource…
dhinckley
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How do I disable multipath on Linux (RHEL 6) when it is on the root partition (/, /boot, /boot/efi, and swap)?

I have been working on configuring multipath on a couple of RHEL 6 servers. Through some fault of my own (blacklist mistyped) I have configured multipath on the root partition, yet it seems that I am having trouble undoing that. The root partition…
REW
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When is storage considered highly-available?

I've read in several places people describing the following configuration as Highly Available: 2 servers (sometimes with multiple HBAs) each connected via multiple SAS cables to one RAID enclosure supporting multipath I/O. Certainly the RAID array…
Doraemon
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Is it possible to create a multipath iSCSI target with two DRBD nodes?

I can put together two linux servers and use the (more or less) new DRBD dual-primary feature to get a shared block device with concurrent read/write access on the two nodes. Can I then export an iSCSI target from each node and use the two like a…
Luke404
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Linux Multipath + SAS Array, "device errors" are logged to dmesg for passive paths? Possible to stop this?

I have two OpenSuSE 11.4 hosts connected to an LSI CTS2600 storage array via SAS. Every time I reboot the hosts, I see in dmesg output like [ 255.942890] end_request: I/O error, dev sdg, sector 8 [ 256.445301] sd 5:0:1:1: [sdg] Result:…
Kendall
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Multipathd load balancing on md3200i

I'm working on setting up a cluster of servers with an iSCSI MD3200i SAN for shared storage. Everything is working well but I have one small detail I can't seem to get working. Multipath seems to only want to do failover with the iSCSI connections…
sinping
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RDAC MPP driver erratic path fail-over errors

In my central syslog I can see a some instances ofo the following error from LSI's RDAC multi-pathing driver for Linux. [RAIDarray.mpp]MY_NICE_STORAGE_ARRAY:1:0:7 Cmnd-failed try alt ctrl 0. vcmnd SN 2436 pdev H1:C0:T0:L7 0x05/0x94/0x01 0x08000002…
pfo
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lpfc + multipath + ubuntu - path keeps switching

I am having issues configuring multipath using Emulex (lpfc). Although I do not detect data corruption the SAN administrator has a tool that shows that the paths are being switched every 20 seconds or so. Here are the details: # multipath -l san01…
A4A
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How do you "fix" a faulty path in device-mapper-multipath

I have a multipath config that was working but now shows a "faulty" path: [root@nas ~]# multipath -ll sdd: checker msg is "readsector0 checker reports path is down" mpath1 (36001f93000a63000019f000200000000) dm-2…
cagenut
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CentOS Multipath using SAS Disks and Multiple Hosts

===========System Design=========== Server A --> 2 PCI LSI HBA Cards Server B --> 2 PCI LSI HBA Cards 8 x SAS Disk Shelf --> Dual SAS Controller 12 Slot Disk Shelf 96 Disks all SAS Seagate Enterprise Drives Systems are cabled in redundant fashion…
user7749674
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