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Questions tagged [mpio]

36 questions
26
votes
3 answers

What does "The IO operation at logical block address # for Disk # was retried." mean when seen in the Windows Server System event log?

I have multipath IO configured server 2012 blade that shows warnings like the following during MPIO path failure: The IO operation at logical block address 0 for Disk 7 was retried. I know what is causing the warning to happen so I am not looking…
Chris Magnuson
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9
votes
1 answer

Why MPIO instead of 802.3ad Team for iSCSI

Doing my first server to iSCSI target and I thought i would be off to a running start by teaming my NIC on the server (conventional 802.3ad team). However, from many online sources I see this is NOT recommended and MPIO should be used instead (there…
morleyc
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7
votes
1 answer

Windows 2008 Unknown Disks

I have a BL460c G7 blade server with OS Windows 2008 R2 SP1. This is a brand new C7000 enclosure, with FlexFabric interconnects. I got my FC switches setup and zoned properly to our Clariion CX4, and can see all the hosts that are assigned FCoE…
Ailbe
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5
votes
1 answer

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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4
votes
2 answers

Synology and vmware with 4 way MPIO slow iSCSI speeds

I am trying to achieve high iSCSI speeds between my ESX box, and the synology NAS. I am hoping to achieve a top speed of 300-400 Mb/s. But so far all i've reached is 150 - 170 MB/s. The main test that I am using is to create a 20GB Virtual Disk,…
acanessa
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4
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1 answer

How to do Iscsi deep discovery?

In our storage array we change the discovery IP. Once the discovery IP is changed, the Multipath connection has to be rebalanced (It should make connection again with new discovery ip). But it is not rebalanced. We had to do Rescan disk and Iscsi…
Samselvaprabu
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4
votes
1 answer

Connecting Freenas to Windows Server 2016 with MPIO

We recently had a Problem with the Raid Card in our Windows Server. We used this excuse to enlarge our storage Pool and implement a few other upgrades. The current Setup is: FreeNAS Server The Server used is a Dell Poweredge R710 with dual Quad…
Melvin_XIII
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4
votes
0 answers

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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4
votes
2 answers

Hyper-V 2012 R2 - MPIO config error "Access Denied"

I am in the midst of migrating to a Hyper-V 2012 R2 cluster and am currently configuring the first host to connect to the iSCSI CSV via MPIO. I "think" I have everything working properly but when I try to create a log file to verify via the MPIO…
Steven Gedzyk
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3
votes
1 answer

How to find which MPIO path is being used for IO?

We were experimenting MPIO with our Storage array. We saw the Get-Iscsisession and Get-Iscsiconnection cmdlet to find the paths created. But during IO ,i would like to know which path has been used. Is it possible? Which tool can be used to check…
Samselvaprabu
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3
votes
1 answer

Standard vSwitch static LAG with iSCSI hardware initiators - impossible configuration?

In one site, we have vSphere hosts with 2 10G NICs. Both NICs are in one vSwitch failover policy IP Hash for static LAG (this is to balance/failover VM traffic) Both NICs (HPE 534FLR-SFP+/QLogic 57810) have hardware iSCSI initiators enabled Each…
Don Zoomik
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3
votes
2 answers

Link Aggregation Control Protocol or Multipath I/O

I am building a new sub-cluster, thereby I am facing few questions. Which technology is more efficient for "boosting throughput" ? (Will be great if you can provide any comparison) As far as I done my google job, there are two technology's which…
hesoyam
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3
votes
2 answers

Why is my iSCSI MPIO Setup not working?

I'm running Windows Server 2012 R2 and want to connect a Synology Rackstation via iSCSI to my server. The connection is done via four seperate LAN ports. The iSCSI part works fine, but if I copy stuff from the server to the NAS only one ethernet…
Boernii
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3
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3 answers

How to use iSCSI MPIO to increase bandwidth with XenServer?

I have a FreeNAS Server with four network interfaces. The iSCSI traffic goes through two of those interfaces, and each interface has one IP address in a different subnet. As example: igb0: 192.168.10.1/24 igb1: 192.168.11.1/24 There are three…
Vinícius Ferrão
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3
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3 answers

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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