iSCSI - SCSI over IP - mount disks across the network

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how to configure ISCSI fault tolerance in ubuntu 12.04 [closed]

how to configure ISCSI fault tolerance in ubuntu 12.04 Anyone has a tutorial or steps to?! thanks in advance knowing that initiator and server are ubuntu
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2answers
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XenServer/Center: Shared SRs for hosts not in same pool?

I would like to use the same SRs on XenServer hosts that are not able to be part of the same pool (because of not having the exact same cpu feature set, if I understand it correctly) in order to share ...
3
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1answer
401 views

Separate iSCSI traffic across two physical NICs if possible?

This question is a follow-on from Dedicated NIC or dedicated port for iSCSI? Excluding the hardware iSCSI initiator point that was made in the accepted answer to the above question, it seems that ...
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1answer
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Fatal: module iscsi_trgt not found — trying to get my iscsi target to run on debian

Sorry about the formatting below... Linux Microknoppix 2.6.39.3 #21 SMP PREEMPT Sat Jul 23 09:48:39 CEST 2011 i686 GNU/Linux modprobe iscsi_trgt results in FATAL: Module iscsi_trgt not ...
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1answer
136 views

How to rebuild my NAS

Today I have a QNAP TS-859U+ with 8 X 2TB disks in it. As it's was setup on day-1 it uses a single volume on a raid 5. The volume has currently a mixture of: 2 shared folders 5 iScsi Targets - ...
2
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1answer
382 views

Need advice with regards to mezzanine card for new HP bl460c gen8 blade

The new blade will connect to an iSCSI MSA2000 SAN with a 1Gb interconnect. Do I need both mezzanine slots populated? What ethernet card do you recommend?
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4answers
2k views

10Gbps iSCSI network transferring at only 2Gbps

I have a performance issue with my SAN. I have a full 10Gbps private network setup. I have the following setup 1 - Mac with Connected with via Fiber Transciever 10GbE 1 - Windows 7 PC with 10GbE 1 - ...
3
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1answer
351 views

Prevent iSCSI connection from being terminated early on reboot

I have a clustered Hyper-V environment with four nodes and three PowerVault MD3xxx storage arrays for shared storage. The servers are using standard Ethernet connections for the iSCSI fabric (not ...
0
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1answer
195 views

Starwind iSCSI shrink device

I have a 600GB device setup and attached via iSCSI using the free version of Starwind. I've found I'll need to use 300 GB of the host drive for another purpose and would like to resize the 600GB image ...
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0answers
379 views

Log On To Target results in “Authentication Failure”

I'm attempting to add an Iomega StorCenter ix2-200 to an existing MS iSCSI setup but it keeps giving an error message. The current iSCSI setup has two Seagate BlackAmor's operating perfectly. Any ...
0
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1answer
853 views

Howo to get Multipath IO with Dell MD3600i into active/active setup?

I'm desperately trying to improve performance of my SAN connection. Here's what i have: [root@xnode1 dell]# multipath -ll mpath1 (36d4ae520009bd7cc0000030e4fe8230b) dm-2 DELL,MD36xxi ...
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1answer
2k views

How to get physical partition name from iSCSI details on Windows?

I've got a piece of software that needs the name of a partition in \Device\Harddisk2\Partition1 style, as shown e.g. in WinObj. I want to get this partition name from details of the iSCSI connection ...
3
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3answers
4k views

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, ...
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2answers
535 views

How to force iscsi initiator to login only once

Trying to setup a few CentOS nodes to connect to a Dell MD3600i array, i'm running into the issue that the MD3600i shows 4 different portals (with different IP addresses) and when i launch the ...
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1answer
1k views

Why does Hyper-V and Windows Backup crash (BSOD) after successfull backup?

Hello I am running Server 2008 R2 with a handful of Hyper-V guest nodes. If Windows backup runs without any of the Hyper-V nodes running, the server is fine. If Hyper-V runs a backup while the Hyper-V ...
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1answer
1k views

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 ...
3
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2answers
974 views

DAS vs SAN storage for serving 2 to 4 nodes

We currently have 4 Linux nodes with local storage, arranged in two active/passive pairs with storage mirrored using DRBD, running virtual machines (actually using Xen Hypervisor) for typical hosting ...
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1answer
71 views

Cache in Storage array [closed]

Hi I just started working in a Storage Lab. I am new to Storage Area Networks, I did lot of searching on Internet about this. I have two doubts : How can we know whether a Storage array has a cache ...
2
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2answers
610 views

Multiple iSCSI Targets or 1 that's shared?

On my network I have several types of files I want to save on a SAN like: SQL db's and logs Exchange data Random files Now I'm wondering if I should create one iSCSI Target with a large volume and ...
0
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2answers
348 views

Connecting to EqualLogic with Starwind Starport Initiator, login trouble?

We have a working iSCSI SAN, an EquallLogic, which runs fine with the Microsoft iSCSI initiator. With the Starport Initiator, we can't even connect. There's no login needed, neither local nor LDAP. ...
1
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1answer
880 views

Connecting to iSCSI Target

I've installed Microsoft iSCSI Software Target 3.3 on a server 2008 R2 machine and created a new iSCSI Target. In the target I created a new Virtual Disk. From another server I started iSCSI ...
4
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4answers
20k views

Disk IO slow on ESXi, even slower on a VM (freeNAS + iSCSI)

I have a server with ESXi 5 and iSCSI attached network storage. The storage server has 4x1Tb SATA II disks in Raid-Z on freenas 8.0.4. Those two machines are connected to each other with Gigabit ...
1
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1answer
269 views

Dell Equallogic PS6100x network configuration

So we just picked up a new PS6100x and I'm wondering if I need to setup the ethernet channels myself or is it automatic? It's configured in an HA setup; dual controllers connected to redundant cisco ...
4
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3answers
561 views

What to look for in a switch with LAN/WAN verses an iSCSI SAN?

I'm setting up a VMWare ESXi 5 environment with 3 server nodes. Dell recommended 2x Force10 S60 switches shared (iSCSI SAN, LAN/WAN). The S60 switches are extremely powerful. They have 1.25 GB of ...
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1answer
426 views

iSCSI filesystem creation on Linux - Best Practices - Large Volumes - Many Files?

We recently purchased HP Lefthand 4500 G2 24TB box and also a DL380 G7 server. I'm running Centos 6.2 (RHEL 6.2). The Lefthand box consist of 12 2TB HD's configured in RAID6. That gives me about ...
3
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1answer
162 views

Is WinSAT reliable to test the speed of my iSCSI, Fibre SAN, under bare metal or Virtualized?

I discovered the following command in this whitepaper: WinSat disk -read -ran -ransize 4096 -drive c Is it reliable to use against a SAN, or iSCSI drive? I would like to compare the output of ...
5
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1answer
3k views

Configuring HP “Multifunction” NIC for iSCSI SAN

I am about to implement a SAN here using a HP P2000; the SAN itself is on-order (ETA a couple of weeks) so in the meantime I'm getting the rest of the equipment up and running. The SAN has ...
29
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3answers
4k views

Tuning iSCSI storage

This is a Canonical Question about iSCSI we can use as a reference. iSCSI is a protocol that puts SCSI commands as payload into TCP network packets. As such, it is subject to a different set of ...
2
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2answers
429 views

VMware - how best to remove an extent from an iscsi volume

In our dev/test environment, I have a vSphere 5 ESXi server running. I have one particular vm on it that went into a panic state because one of it's virtual disks was hosted on a volume that ran out ...
0
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1answer
541 views

Unable to initialize BlackArmor after running iSCSI Manager and Windows 7 iSCSI Initiator

I want to add a 12TB NAS to my current iSCSI, which already controls an Iomega StorCenter ix2-200 1TB NAS. I've connected to the new NAS via Windows 7 iSCSI Initiator. When I open Disk Manager it ...
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1answer
2k views

vSphere 5/Dell MD3000i multipathing configuration clarification

Revisiting an older vSphere setup with two Dell 1950s, 4 NICs per host: esxi1 and esxi2 for simplicity sake. SAN is a Dell MD3000i, two controllers, two NICs per controller: rc00 and rc01; rc10 ...
2
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1answer
562 views

Viewing map of iSCSI target -> LU in COMSTAR

I'm creating a number of iSCSI targets on an OpenIndiana server using COMSTAR. Basically: zfs create -V 10g pool/comstar/vol sbdadm create-lu /dev/zvol/rdsk/pool/comstar/vol stmfadm add-view ...
6
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1answer
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Which events specifically cause Windows 2008 to mark a SAN volume offline?

I am searching for specific criteria/events that will cause Windows 2008 to mark a SAN volume as offline in disk management, even though it is connected to that SAN volume via FC or iSCSI. Microsoft ...
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2answers
450 views

Feasibility of controlling two or more NAS via iSCSI

We currently run a two-year-old Iomega StorCenter ix2-200 through Windows iSCSI initiator on a Dell Optiplex 745. Meanwhile, we have two Seagate BlackArmor 440's running independently through Ethernet ...
2
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1answer
259 views

iSCSI aggregation using one switch

Thinking of doing 2Gb aggregated iSCSI between a VM Host and a multi controller iSCSI array. Multipath with two switches is normal for this, but I only have one switch at the moment. But the switch is ...
2
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0answers
975 views

Volume manager of Windows Server 2008 R2 does not show all iSCSI volumes

we set up a backup server (Win2k8 r2) for our VMware infrastructure which uses an iSCSI SAN for storage. The backup server has to be connected to the SAN for Veeam to be able to backup virtual ...
7
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2answers
3k views

Troubleshooting strategy for very poor iSCSI/NFS performance

We have a new Synology RS3412RPxs that offers iSCSI targets to three Windows 2008 R2 boxes and NFS to one OpenBSD 5.0 box. Logging into the RS3412 with ssh and reading/writing both small files and ...
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0answers
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Equallogic ESXI 4.1 Slow read performance

We experience a slow read performance with a high read latency in vSphere/ESXi on our Equallogic iSCSI array (14x 750gb in RAID10). We checked already very much but cannot find anything. Setup: ...
3
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2answers
533 views

RHEL iSCSI on FreeNAS

I am able to mount a iSCSI SAN drive onto multiple RHEL Servers, but when I make changes to the files on SAN, they are not evident on the other servers sharing the same drive. Am I missing something? ...
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2answers
269 views

iSCSI basic concepts

I have just detected that in one of my hosts (this is a virtual machine run by a cloud provider) there is a process eating up some bandwidth: NetHogs version 0.6.0 PID USER PROGRAM ...
2
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1answer
355 views

Windows 7 routing traffic through the gateway for local addresses

Windows is adding a route for a local address (10.0.0.90 - my fileserver) with a gateway of (10.0.0.138 - this is my gateway), the gateway only has a 100Mbs link so all of my fileserver bound traffic ...
1
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1answer
486 views

ESXi 5 - Custom build iscsi or openfiler?

This is for a development environment, NOT a production environment. We have 2 ESXi 5 hosts that is currently using their own local disks for storage. We have a very large Supermicro server that has ...
5
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1answer
1k views

Esxi with iSCSI SAN slows down with many multiple VMs running

I have a server with ESXi 5 and iSCSI attached network storage(4x1Tb Raid-Z on freenas). Those two machines are connected to each other with Gigabit ethernet, and a procurve switch in between. After ...
5
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1answer
803 views

Dedicated NIC or dedicated port for iSCSI?

When spec'ing and configuring a machine that will utilise shared iSCSI storage, I've read a lot of documentation which suggests a dedicated network adapter should be used for iSCSI communication. That ...
0
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1answer
400 views

iSCSI storage, partitioning and LVM

We are in the process of moving our (direct attached) storage systems to an iSCSI based consolidate storage and we have come up with this interesting question: where should we place LVM processing? ...
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2answers
281 views

DPM 2010 iSCSI Mirror

We're using DPM 2010 for exchange backups, The backup Disk(s) are iSCSI attached drives from multiple NAS boxes. We'd like to mirror iqn.2009-07.com.example.example:RAID.iscsi4.vg0.iscsi05 onto ...
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2answers
243 views

Can i pause VM's while power-cycling iscsi storage array

Unfortunately I may have to power-cycle my storage array. In the context of using KVM with libvirt managing the Virtual Machines where i need to power-cycle the storage array, is it possible or even ...
1
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1answer
1k views

Win2K8 Server MPIO iSCSI failover not working

I have a desire to pass iSCSI traffic between my Windows 2K8 Server lab system and my NetApp filer across two separate network stacks*. My configuration is as follows: one Win2K8 server with the ...
0
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1answer
535 views

Linux Multipath - Can a Host connect to two different SANs?

I may need to power-cycle a SAN and i'm looking to avoid downtime. I have some options to essentially copy live LUNs from one SAN to another. Currently i have a single iSCSI SAN and i connect to it ...
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1answer
6k views

Cannot enable iSCSI port binding without adding a physical NIC to the vSwitch

Why can I not have a purely virtualized SAN in vSphere 5? I cannot enable the iSCSI port binding option (it is greyed out and unchecked) or add the VMkernel to the iSCSI software host bus adapter ...