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Questions tagged [multipath]

135 questions
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Can SMB3 Multipathing be weighted by policy?

Consider a configuration with two identical WS2012R2 servers. Both have quad-port network boards. Each has one NIC connected to a subnet shared by other servers and ultimately accessible to client machines. The remaining three ports on each server…
Jeff Sacksteder
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Mounting a disk from SAN (RHEL 5.9)

Storage admin told me he put a 3TB drive on my server from the SAN and I was asked to mount it. The only information I know is that it's on LUN 1 and that the disk is 3TB. Multipath is setup and I have QLogic drives installed. I'm not sure what to…
에이바
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Why is my MPIO connection to the SAN capped at 1 Gbps when using Linux?

I'm connecting a RHEL5 box to a Dell EqualLogic PS5000X and seeing a maximum of 1 Gbps even while using MPIO with three gigabit NICs. I have all three interfaces on the PS5000X and three dedicated iSCSI interfaces on the server connected to the same…
Austin Lundeby
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What is the least expensive way to obtain 1,000s of public IP addresses?

What is the least expensive way to obtain 1,000s of public IP addresses? I'm needing to serve secure (https) pages for 1,000s of SSL certificates, and need a separate IP address for each SSL cert. So, I'm looking for the most economic means of doing…
Loryn
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"Bad message" with a new SAN using multipath and iSCSI

I'm configuring a new SAN for a set of Ubuntu 18.04-based servers. Each of nodes can mount the ext4 formatted partition fine. Being new to both multipath and iSCSI, I'm not sure if what I'm seeing is "normal". I'm having two problems so far. When…
Ray
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What is Multipath I/O?

What exactly does "Multipath I/O" mean?
Karel Bílek
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XenServer 6.5 iSCSI MPIO with point-to-point links (without a Switch)

I'm doing some experiment with iSCSI MPIO between FreeNAS 9.3 and two XenServer 6.5 hosts. I would like to use iSCSI MPIO to serve as VM storage. Pretty common environment, but without a switch to reduce the cost of the solution and minimize the…
Vinícius Ferrão
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Is it possible to multipath across FC and iSCSI?

Perhaps a silly question this one, but I was wondering if it were possible to multipath a storage array across a FC connection and an iSCSI connection? Given that the main point of multipathing seems to be to increase resiliancy in the face of…
growse
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Linux multipath: How to configure a single multibus path group

I have just upgraded a functional Ubuntu 16.04 host to 18.04 and am now having issues with multipath. Package versions: * multipath-tools 0.7.4-2ubuntu3 * open-iscsi 2.0.874-5ubuntu2.7 I have a Dell PowerVault MD3860i with four paths to the host.…
Eil
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multipath on iscsi target is it posible?

Is it possible to configure multipath on target iscsi SAN? I configured multipath on vmware iscsi initiator and it's work but bouth flows goes on the one SAN storage port with the IP but is it posible to use one ip on different SAN ports becose…
Vladimir
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Solaris Multipathed I/O - Physically Removing a Disk

I am a Solaris newbie. I have a Solaris 10u8 machine that is running an attached J4400 and some internal drives. We're using multipathed SAS I/O (stmsboot; mpathadm), so the device mount points have been moved off from their normal c0t5d0 to long…
Karl Katzke
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multipath, device mapper, and disk i/o scheduler

We have two machines with a multi path SAS controller, each with 12 physical disks attached. We were looking into some I/O speed oddness, and noticed that on one machine, where /dev/mpath/mpath*p1 maps to dm-13 through dm-24 in various ways, dm-13…
Michael Graff
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lvextend: New size (3071999 extents) matches existing size (3071999 extents)

I configured LVM on a 12TB device with 1 partition. I then tried to extend the LVM across a second 12TB device with 1 partition. vgextend worked, but lvextend doesn't see the space on the second device. Here's how I partitioned the second device: #…
Leo
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FC-Multipath: Which path_selector performs best?

So I learned that since Red Hat 6 it is possible to choose between 3 algorithms for loadbalancing between different paths to my FC-SAN, the default dumb round-robin - and new - queue-length and service-time. I have been searching for a long time…
Christian
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Multipath device unpresented to host. How to delete it from LVM and the system?

OS: Red Hat Enterprise Linux AS release 4 Storage people had unpresented a couple of disks previously exported to the system (things that... sometimes happens). Well, there is no problem with this because that disk were empty and data was migrated…
Alex G.Q.
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