iSCSI - SCSI over IP - mount disks across the network

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How does Xen Server share iSCSI?

When I create a resource pool of multiple XenServer hosts, add an iSCSI storage repository, how do the separate hosts orchestrate access to the iSCSI storage repository? To be clear, consider if I ...
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Setting up a highly available Mail service with Postfix and ISCSI [migrated]

in an academic project these days we've got to set up a highly available Mail service with ISCSI and Postfix... For now i have a highly available ISCSI SAN and also a highly available Postfix server, ...
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21 views

Windows 2012R2 hyper-v guest diskless - boot from iscsi guide?

I am attempting to build a generation 2 W2012R2 hyper-v server guest that, configured with no disk or vhd , will select it's iscsi o/s disk via Microsoft dhcp and boot Windows 2012 R2. Note that I ...
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Can't mount read-write iSCSI with MTU=9000

I'm attempting to connect my desktop (running debian 7) to a QNAP NAS (running QTS 4.1.1) using iSCSI with an MTU=9000. The network infrastructure consists of a cat5e crossover cable between the ...
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40 views

High availability using Fibre Channel and iSCSI in vSphere

I'm having a hard time understanding shared storage for high availability in vSphere. I have the following kit: 1 x Mac mini (ESXi 5.5 - part of vSphere) 1 x White box PC (ESXi 5.5 - part of vSphere ...
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How to enable disk cache again after enabling iSCSI in Windows Server 2012?

I create an iSCSI Virtual Disk and a corresponding target. This enables the cache bypass flag on the volume. After I remove the iSCSI disk, the flag doesn't get reset. Anyone can help me to reset ...
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475 views

iSCSI connection drops frequently - Synology NAS

I have a Windows 2012 R2 Server connected through iSCSI to my Synology Rackstation 2414+. The problem is that the connection drops very very frequently, up to 10 times a day (manually restored ...
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1k views

CentOS 6.4 iSCSI Target - crm shell error

I try to make a iSCSI Target on CentOS 6.4 with DRBD, Pacemaker, Open-iSCSI and LVM2. Now i need to prepare the HA iSCSI Target configuration on the crm shell, but if i enter the configure mode, ...
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XenServer move VM Failed

We currently are running our XenServer virtual machines off of an over extended Drobo unit and wanted to migrate a particular 600+GB VM off of the Drobo onto a newer Drobo, so I attached a storage ...
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vSphere 5.1 and iSCSI multipathing

I have a problem in configuring vSphere Cluster with iSCSI multipathing. Host in cluster have four physical interfaces. Host have four vmk interfaces for iSCSI, which mapped to individual physical ...
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iscsiadm discovery gives this error: “Try `iscsiadm --help' for more information.”

Many sets of instructions (e.g. Softlayer) provide this command for discovering a new iSCSI device: iscsiadm –m discovery –t sendtargets –p 255.255.255.255 The man page for iscsiadm gives this ...
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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 ...
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Removing an iSCSI Target - iSCSI initiator 2.0 on Windows Server 2003 R2

For the life of me I cannot figure out how to remove an iSCSI target (Dell Equallogic SAN) from a Windows Server 2003 box. The volume shows up in Windows as drive letter Y:\ Using the iSCSI ...
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Configuring a VMWARE server for software ISCSI

I have an IBM x3650 with the following components: 6 Gb NICs (all connected to an Extreme Networks x450 switch that also houses the ISCSI vlan and the SAN ISCSI connections) I need to configure ...
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967 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 ...
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2k views

Successful login with iscsiadm on target still doesn't create block device

I've set up an experiment to test iscsitarget and initiator, which at some point worked. Later, I turned the setup back on and much to my dismay, the initiator machine stopped making block devices for ...
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675 views

iscsi TGTD gets continuous tgtd: conn_close(100) connection closed, 0x10b9288 1

I have a NAS server running tgtd on Centos 6. In my /var/log/messages, I an getting a constant entry every 3 seconds: Sep 26 22:21:24 san2 tgtd: conn_close(100) connection closed, 0x1143728 1 Sep ...
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iSCSI Volume disappears from physical server during windows backup

I've got a Windows Server 2008 R2 box that I back up to an remote iSCSI volume via Windows server backup. I use Microsoft's iSCSI Initiator and Target software on both the Local machine and the remote ...
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167 views

Windows Server 2012 R2, iSCSI Target Server 80 diskless clients, hanging failures hangs and whatnot [closed]

I have bitten way more than I could chew. Recently purchased a 80 diskless PC Internet/Gaming Cafe. The running system was cracked CCBoot, which at first seemed like caused random hangs, which ...
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fdisk -l do not detect device accessed using iscsi o XEN virtual machine

I am experiancing an issue in accessing the iscsi target in VMs created on XEN hypervisor. I have used Suse 11 SP3 to configure this. After discovering the iscsi targets from VM , I am able to view ...
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iscsi with multiple lun, how linux to connect only selected lun

My 10.1.1.100 have 10 Targets. I'm initially connected to single Target by running iscsiadm --mode node --targetname iqn.2005-06.com.drobo:b800i.1112.id5 --portal 10.1.1.100:3260 --login It only ...
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Broadcom BCM57810 iSCSI offload performance

Anyone out there doing iSCSI offloading using Broadcom BCM57810 10 gigabit ethernet cards? My test scenario Network.... 2 x Dell Force 10 S4810 switches Client.... Dell R620 24 core 128gb memory ...
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326 views

Install xenserver on iscsi target

Is is know that Xen Server is based on CentOS, and it is fact that CentOS can be installed on an ISCSI target flawlessly, but I wanted to install Xen server on an ISCSI target I couldn't find a way. ...
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Find out /dev/by-id/wwm path using targetcli (LIO)

To mount my diskless iscsi I am using the /dev/by-id/wwn-0x1234567... devices. The server in question is using ILO and administrated by targetcli. I seem to unable to query the WWN in targetcli the ...
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Running iSCSI LIO with high availability

I've build a two node storage setup with OCFS on top of DRBD to provide storage for a couple of ESXi servers. Will it be possible to setup iSCSI targets on both storage nodes and make one of the nodes ...
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1k views

How to connect SAN from CentOS through two iSCSI Targets

I had asked the similar question before. This time I want to use subnet for two iSCSI Targets, hence I start a new question. I have an old Promise VTrak M500i SAN Server. It comes with 2 iSCSI ...
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Xen cannot see all the LUNs in ISCSI HP StorageWorks MSA2312i Dual Controller Modular Smart Array

I have a HP StorageWorks MSA2312i Dual Controller Modular Smart Array and a second enclosure. I have four vdisks: vd01 (RAID5) (Current Owner A) vd02 (RAID5) (Current Owner B) vd03 (RAID10) ...
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57 views

Ubuntu, iSCSI LIO listen on any IPv4

I've installed targetcli from repo on my Ubuntu 14.04 server. I'm trying to figure out how to make the service listen on any (0.0.0.0) address. Trying to setup 0.0.0.0 specific gives me an error: IP ...
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292 views

Backup Hyper-V VMs using wbadmin and iSCSI on Windows Server 2012

I am trying to setup a backup system at my work. We have an Windows 2012 environment with some VMs. We have a SAN and I tried do backups on a shared folder but, because of some incompatibilities with ...
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174 views

Proxmox virtual machines and iSCSI NAS

I ordered a dedicated server from a certain service provider and they rent out iSCSI NAS as well. So I ordered 1TB iSCSI and connected it to proxmox via GUI. Then I read that the provider does not ...
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216 views

Shared access to iSCSI target

Does anyone know how shared access (multiple Initiators) to a single iSCSI target is supposed to work. I have got it semi-working with Linux (CentOS-7) target and Win 2012 server / Win Hyper-V 2012 ...
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124 views

Persistent Disk Name in RedHAt Cluster on VMWare Workstation-10.01

I am trying to implement a 2 Node REDHAT HA cluster. The following is my environment. VMWare WorkStation 10.01 Node-1 >> CentOS-6.3 x86_64 Node-2 >> CentOS-6.3 x86_64 Node-3 >> CentOS-6.3 x86_64 [ ...
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iSCSI SAN RAID 10 Performance — Poor Read, Good Write

I have a EqualLogic PS4000 SAN unit with the latest firmware, setup in RAID 10. I have 3 2TB Volumes on the SAN shared out via iSCSI on 2 eth ports on two different subnets. I have moved a test server ...
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159 views

Deploying iSCSI Diskless Clients via WDS

I am trying to install Windows 7 to iSCSI targets that will be booted by diskless clients via iPXE. To do this, I need to setup .wim boot and install images in WDS. Is there a way to create standard ...
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Why should iscsi traffic be isolated?

Why should iscsi SAN traffic be isolated? I'm trying to explain to my network guy why we should isolate the traffic.
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Windows Server Backup to iSCSI target 10x slower than copying a file using Windows Explorer to the same location

I'm running a colocation server with Windows Server 2008 R2. As a backup target, I'm using a Linux server run by the datacenter provider. The storage is addressed via iSCSI so that I can use Bitlocker ...
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Properly ordering shutdown of MySQL and iSCSI on Ubuntu Lucid

I'm running MySQL on an Ubuntu 10.04 server, with the MySQL $datadir located on an iSCSI volume. The filesystem is tagged with "_netdev" in /etc/fstab. On system shutdown, upstart sends MySQL a ...
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212 views

Is there any downtime when expanding a volume on an iSCSI setup using Synology Hybrid RAID?

The subject sums up the scenario. I believe the answer is there is no downtime but the system might simply be slower during the rebuild. Which is fine. But if there is downtime, how long? A small blip ...
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281 views

Cluster-Shared Volume on Windows Server 2012 R2 drops off with minor iSCSI pauses

We are running into an issue here where the Cluster-Shared Volume attached to our Hyper-V 2012 R2 cluster is being dropped off / faulted with the slightest interruption from the iSCSI SAN connection ...
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iSNS Best Practices

I am looking into deploying an iSNS server to simplify deployment of a new iSCSI infrastructure for a client of mine. I feel that I understand what iSNS does and how to configure it, but I'd like some ...
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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 ...
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iSCSI paths are alternately active and dead after connecting second ESX server

Multiple Virtual Machines (VMs) reside on an ESX server (ESX1) and are stored on iSCSI. Connecting a second (ESX2) to iSCSI seems to work fine as a VM is created and stored on iSCSI. However inactive ...
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sg_map & lsscsi showing old storage version

I am using SUN storage and recently upgraded/refreshed my ISCSI LUN storage. We have replicated old storage to new storage and attached to our servers. I can see at SUN storage side that storage is ...
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334 views

Lio iSCSI target on OpenSUSE?

I want to use an iSCSI targeting framework that supports SCSI-3 and VAAI for use as an iSCSI SAN cluster across 2 servers. As far as i'm aware I can use either Lio ...
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Windows 8 on iSCSI with LIO target: thin provisioning

I have installed Windows 8.1 on an iSCSI target. This target is provided by Linux LIO and is backed by a sparse file. One of the reasons I created such an installation was thin provisioning. In other ...
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Hide iSCSI targets in linux?

My SAN reports the same targets with multiple IP addresses. Is there a way to hide some of those IPs so I don't see the same targets multiple times?
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iSCSI remote boot from intel NIC working in vmware ESX, not other distro´s

The objective is to have a completely diskless Centos connected to storage via. iSCSI over a 10Gb intel X540 NIC. The ROM on the NIC is flashed as initiator and tailing the logs on the target, i can ...
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CentOS Client - Unable to Establish iSCSI connection with multiple interfaces on the initiator

So after upgrading to CentOS 6.2, I am seemingly no longer able to login into my iSCSI targets. I have multiple interfaces on different subnets on the system, and I first thought that it had to do ...
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What is the maximum number of iSCSI connections that Server 2012 R2 can initiate?

I found online that Server 2008 R2 host can only initiate a maximum of 255 iSCSI connections, and that it was a hard limit within the OS itself. Does this same restriction apply to Server 2012 R2? ...
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Setting up a multi-host SAN

I'm looking for some advice on setting-up multi-host I/O access on our SAN: I have a blade enclosure (PowerEdge1000e) containing an Equallogic PS-M4110 storage blade with a single RAID6 volume ...