Questions tagged [iscsi]

iSCSI - SCSI over IP - mount disks across the network

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large iSCSI disk a good idea on an entry-level "unified" NAS?

I am working on implementing a D2D backup solution for ~150 computers based on Crashplan ProE (no cloud storage). For the storage backend, I picked up an Overland Snapserver DX2 head unit and one ...
Adam's user avatar
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NetApp Flex Volumes (Flexible Volumes)

I have an aggregate with a 150 GB Flexible volume with a 3 TB capacity and a growth increment of 10 GB. If I want to Copy 1.5 TB of data to the volume, it tells me there is not enough disk space. ...
Gregg L's user avatar
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iscsi versus non-iscsi san?

We are considering adding a SAN. I have two choices right now, the Dell MD3000 and the Dell MD3000i, 15 x 146Gb san drives. Naturally the latest model is more expensive (2x as much), but can ...
Alex's user avatar
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Can I attach iSCSI to VMware ESXi without licensing?

I have multiple ESXi hosts, managed individually because I have yet to buy licensing. Can I tie my iSCSI SAN to these hosts and utilize it for VM storage and run VM's on that iSCSI device?
eth0's user avatar
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How do you get iSCSI multipath to discover new LUNs that have not been partitioned yet?

Oracle Linux 6.3 iscsi multipath shows LUNs with existing file system but not the raw block devices that have not been partitioned yet. When I run multipath -ll it will show a LUN that has previously ...
George Horlacher's user avatar
6 votes
2 answers
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links between switches for iSCSI

We inherited a SAN/vmWare/iSCSI setup with both Dell and HP equipment purchased for it, but not fully setup, and we need to get some additional switches to make it all work. But we're getting ...
Gregory Thomson's user avatar
1 vote
2 answers
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VMWare vSphere 5: 4 pNICs for iSCSI vs. 2 pNICs

New SAN for me, never used before: it's an IBM DS3512, dual controller with a quad 1GbE NIC per controller that a client bought and needs help setting up. Hosts (x2) have 8 pNICs and while I usually ...
gravyface's user avatar
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Fine tuning iSCSI Initiator configuration in Windows Server 2008 R2

I've set up a 3 node cluster with Windows Server 2008 R2. I need to connect to these nodes a lot of lun (18 LUN on each node; not my decision... :( ). After digging a while with iSCSI Initiator ...
doGmaI's user avatar
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1 answer
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Dell Powerconnect 7024 and iSCSI on Dell PS6000

I am setting up an iSCSI environment for a Windows Server. I will be using 2 Dell Poweconnect 7024s , 1 Dell PS6000, and a Windows Server (2008 R2). I have more experience in fiber switches and EMC ...
Chadddada's user avatar
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iSCSI write cache

Is there a way to setup on a Linux iSCSI initiator a local disk partition for write cache ? The data would be first written on some high performance local disk and then in a second time on capacitive ...
skizo's user avatar
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iSCSI using uplink ports on switch

Do the uplink ports on switches typically work okay as iSCSI ports? We're adding a 10gb iSCSI SAN, and want to get a combo switch (48x1gb & 4x10gb SFP+ uplink ports) and use the 10gb for the iSCSI ...
Gregory Thomson's user avatar
3 votes
6 answers
9k views

iSCSI Distributed RAID?

Thinking about setting-up as distributed RAID array over iSCSI. Has anyone else tried this, if so what was your experience. To be more specific I am thinking of a couple of CentOS servers each with ...
NickC's user avatar
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iSCSI - what's faster?

I have a DroboPro that is currently connected to a GS748TS switch. Also connected to the switch is a server and few workstations. Which method would be better in performance? Add a NIC to the server....
Unplugme71's user avatar
5 votes
3 answers
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AWS Storage Gateway without the "on-premises" part?

The use cases for the AWS Storage Gateway always seem to assume that the virtual storage gateway would be installed on-premises (i.e. local to the customer) and would then be synced to AWS. I am ...
Matt White's user avatar
1 vote
1 answer
148 views

MPIO Linux Servers and switches

Good day, I have an UltraStor RS16IP4 ISCSI SAN and two Netgear GS748T switches. I'm looking to integrate MPIO (Multipath I/O) between my servers and the SAN. I'm somewhat new to MPIO and want to ...
Nick M.'s user avatar
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2 answers
2k views

Can't access to a iSCSI volume

I have a iSCSI target on a customer place I'm using from an old Fedora (Core6) server. I configured it and formatted as ext3 (mistake, now I know) and I've been working with it for some time. Now I ...
jmiguel.rodriguez's user avatar
1 vote
2 answers
297 views

Adding storage to ESXi host

We have two hosts running VMWare ESXi 4.1. Both are connected to a RAID 5 array via iSCSI. We added three more disks to the RAID array. Now I need to assign the new storage somehow to the ESXi hosts. ...
Sven's user avatar
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1 answer
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iSCSI errors continue after removing inaccessible target portal

By mistake I entered an iSCSI target portal address in the iSCSI Initiator on one of our virtual servers that does not have an address in the network range used for iSCSI. This caused the following ...
Ansgar Wiechers's user avatar
0 votes
1 answer
2k views

iSCSI logout Input output error

203 hava a iSCSI target named poolA that I am trying to log into using this command: iscsiadm -m node -T poolA -p 192.168.0.203 -l I am trying to use it as a vg. Secondly, I create two lvs on this ...
liuzhijun's user avatar
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1 answer
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How to connect a VM running on an ESXi host to that host via a VMKernel NIC?

Say I have an ESXi (5.0) host that runs a Linux distribution which hosts iSCSI targets, which contain the images for other VMs which the host will run. When it's used, I'll start the host first, then ...
Zac B's user avatar
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4 votes
4 answers
11k views

Boot from iSCSI. How does it work?

I have a Supermicro 2uTwin2 blade server which we're hoping to run XenServer on. Because this motherboard only provides Intel's fakeraid, I was hoping to leverage its boot from iSCSI functionality ...
Zorlack's user avatar
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5 votes
1 answer
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Openfiler iSCSI performance

Hoping someone can point me in the right direction with some iSCSI performance issues I'm having. I'm running Openfiler 2.99 on an older ProLiant DL360 G5. Dual Xeon processor, 6GB ECC RAM, Intel ...
Justin's user avatar
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Backups devices for Windows Server Backup and Symantec [closed]

What is the best way to backup windows SQL, Exchange or AD servers data to? NAS, external USB , iSCSI or perhaps some other backup solution? I will not however be considering cloud backup solutions ...
jmtheron's user avatar
4 votes
3 answers
6k views

Jumbo Frames, ISCSI and ESXi

I have enabled Jumbo Frames (9000) in ESXi for all my vmNICs, vmKernels, vSwitches, iSCSI Bindings etc - basically anywhere in ESXi where it has an MTU settings I have put 9000 in it. The ports on the ...
vlannoob's user avatar
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7 votes
5 answers
23k views

CentOS iscsi initiator has session but there is no block device

I have installed the scsi-target-utils package on CentOS and I used it to perform a discovery. The discovery did give me an active session. I restarted the iscsi service but I do not see any new ...
jcalfee314's user avatar
1 vote
2 answers
826 views

iSCSI no longer recognizing NAS drives

I have two NAS (Seagate Black Armors) connected to our network through iSCSI to a Dell Optiplex 760 running 32-bit Windows 7 and Windows iSCSI Initiator. For some unknown reason, within the last week ...
Hammer1's user avatar
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1 answer
706 views

Lock ups, crashing, transferring files using TrueCrypt with iSCSI

I have looked into this error and it seems that it hasn't been discussed yet - or at least I can't find any information relating. I'm having issues transferring files, usually larger files over a ...
Anthony's user avatar
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4 answers
2k views

iSCSI timeouts under high load

I have two servers connected via Gigabit Ethernet. One is iSCSI target, the second one is initiator. When I run mkfs.ext4 at initiator, after a while disk IO slows down critically in target. In the ...
Antonio's user avatar
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2 answers
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Drbd Primary/Primary + iSCSI: accessing to different files avoids split brain?

I have a question / curiosity about split-brain on a Drbd Primary/Primary configuration. Supposing two nodes (hosts), host1 and host2 configured with Drbd Primary/Primary and two different shares (NFS,...
Eddie C.'s user avatar
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4 votes
1 answer
1k views

Page allocation failures on iSCSI storage

We have a CentOS 6.3 iscsi server (16GB RAM) running on Infiniband bus (ipoib). When the load is high I can see multiple errors: Sep 3 23:22:20 stor4 kernel: tgtd: page allocation failure. order:2, ...
Dave's user avatar
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1 vote
1 answer
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iSCSI Disconnects every 30 minutes

Every 30 minutes, almost by clockwork, a get the following error on my Windows 2008 R2 servers: Log Name: System Source: MSiSCSI Event ID: 113 Level: Warning Description: ...
Steve Evans's user avatar
5 votes
3 answers
8k views

ZFS on top of iSCSI

I'm planning on building out a file server using ZFS and BSD, and I was hoping to make it more expandable by attaching drives stored in other machines in the same rack via iSCSI (e.g., one machine is ...
Solipsism's user avatar
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1 vote
1 answer
4k views

ShadowCopy Error 7001 (Unable to create a shadow copy) but SC got created and works fine, what to do?

I'm running Windows Server 2008 R2 on a Dell R410. A QNAP NAS is connected to it via gigabit crossover. A 2.6 TB LUN is mounted via iSCSI as Volume Z:. A task should create Shadow Copies three times ...
hub's user avatar
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1 vote
3 answers
2k views

Understanding the concept: Bare-metal VMware ESXi 5.0 with FreeNAS guest VM and iSCSI

I have a test setup (HP Microserver) with just a single disk at the moment and have ESXi 5.0 bare-metal installed on a USB flash drive and a FreeNAS 8 VM created as a 2GB install, but now I'm at a ...
Tim's user avatar
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6 votes
2 answers
12k views

ZFS over iSCSI high-availability solution

I am considering a ZFS/iSCSI based architecture for a HA/scale-out/shared-nothing database platform running on wimpy nodes of plain PC hardware and running FreeBSD 9. Will it work? What are possible ...
oberstet's user avatar
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-4 votes
1 answer
2k views

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
Maythux's user avatar
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2 answers
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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 ...
3molo's user avatar
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3 votes
1 answer
1k 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 ...
dbr's user avatar
  • 1,862
0 votes
1 answer
9k views

Fatal: module iscsi_trgt not found -- trying to get my iscsi target to run on debian

My server info: 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 found. So I run # apt-...
JasonC's user avatar
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0 votes
1 answer
406 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 - of ...
Saariko's user avatar
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2 votes
1 answer
1k 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?
mikedos's user avatar
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4 votes
4 answers
8k 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 - ...
cohortq's user avatar
  • 475
4 votes
1 answer
1k 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 ...
Chris McKeown's user avatar
1 vote
1 answer
567 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 ...
Simon.B's user avatar
  • 11
0 votes
2 answers
1k 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 [size=5.5T][...
Disco's user avatar
  • 1,451
4 votes
1 answer
6k 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 ...
Barry Kelly's user avatar
3 votes
3 answers
8k 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, ...
Disco's user avatar
  • 1,451
1 vote
2 answers
2k 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). When I launch the initiator ...
Disco's user avatar
  • 1,451
2 votes
1 answer
2k 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 ...
Payson Welch's user avatar
2 votes
1 answer
4k 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 ...
Luke404's user avatar
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