iSCSI - SCSI over IP - mount disks across the network

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2
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1answer
447 views

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 ...
7
votes
2answers
336 views

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 ...
0
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2answers
792 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 ...
0
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1answer
216 views

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 ...
2
votes
1answer
582 views

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 ...
1
vote
1answer
90 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 ...
1
vote
2answers
480 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 ...
1
vote
2answers
215 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. ...
0
votes
1answer
8k views

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 ...
0
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1answer
494 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 ...
1
vote
1answer
224 views

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 ...
4
votes
4answers
2k 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 ...
3
votes
1answer
3k views

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 ...
-1
votes
1answer
63 views

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 ...
4
votes
3answers
3k 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 ...
1
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4answers
4k 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 ...
1
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2answers
273 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 ...
0
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1answer
536 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 ...
0
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4answers
984 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 ...
1
vote
2answers
433 views

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 ...
4
votes
1answer
550 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. ...
1
vote
1answer
1k views

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: ...
2
votes
3answers
931 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 ...
0
votes
1answer
1k 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 ...
1
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3answers
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 ...
3
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2answers
5k 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 ...
-4
votes
1answer
1k 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
1
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2answers
2k views

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
votes
1answer
452 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 ...
0
votes
1answer
4k views

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 ...
0
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1answer
148 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
votes
1answer
440 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?
3
votes
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
votes
1answer
454 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
votes
1answer
256 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 ...
0
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2answers
980 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 ...
4
votes
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
votes
3answers
5k 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, ...
0
votes
2answers
588 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 ...
2
votes
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 ...
2
votes
1answer
2k 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
votes
2answers
1k 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 ...
-6
votes
1answer
72 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
votes
2answers
686 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
votes
2answers
376 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
vote
1answer
1k 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
votes
5answers
23k 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
vote
1answer
306 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
votes
3answers
596 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 ...
-1
votes
1answer
506 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 ...