iSCSI - SCSI over IP - mount disks across the network

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Same LUN trough FC and iSCI to different hosts

On my small vMware lab I'm presenting the same LUN to both ESXi hosts, one from FC and another from iSCSI. iSCSI finds the devices but doesn't mount the datastore. As I can see disks have different ...
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41 views

VMWARE Guest Storage VMDK vs RDM-V vs RMD-P

When is it best to use VMDK, RDM-V or RDM-P? I have always defaulted to using the standard VMFS5 Datastores with VMDK files for each server. However I typically use RDM-V when I need an excessive ...
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21 views

How to emulate or make multiple iSCSI software initiator IQNs on RHEL RedHat 7?

I have 2 Ethernet HBAs with 2 ports each, all 4 ports are connected to iSCSI targets and I can login using iscsiadm command. But the iSCSI initiator name (IQN) for all 4 ports is one, in ...
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14 views

iSCSI Disk Usage on Initiator Does Not Match Target's Usage

I have a pair of Ubuntu 14.04 installs running within VirtualBox. I installed the IET target server (iscsitarget package) and have it properly serving up my selected LVM volume; this volume is ...
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1answer
24 views

iSCSI Windows Cluster share target or target per node

I have a lab environment where I have a Synology NAS that provides iSCSI targets which are used by Windows 2012 R2 VM's running on virtual box. I want to setup a Windows Failover Cluster and in order ...
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17 views

Unable to disconnect iSCSI Target

I'm fairly new at this, please pardon my ignorance. I have a backup drive on a NAS that I need to disconnect from iSCSI in order to increase it's size. I've gone into Disk Management, made sure the ...
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1answer
121 views

open-iscsi initiator on linux does not see the passive side of an active/passive open-e target

I have a Linux server running SLES11 SP4 which uses open-iscsi and multipathing to connect to a LUN that is presented from an Open-E DSS v7 storage cluster with active/passive failover. The Linux ...
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16 views

How to stop iSCSI server?

Is it possible to stop listening on iSCSI server port 3260 without deleting the portal from the configuration? I tried to stop all services I know, but it's still running. [root@okvmh1 ~]# systemctl ...
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XenServer 6.5 Zeroed Performance Metrics for IOPS

In one of my XenServer 6.5 pools, I'm adding some graphs in XenCenter to measure my iSCSI storage IOPS and throughput performance and I'm getting no response. The graph is actually responsive, but ...
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25 views

iSCSI Virtual Disk Missing

I have one Supermicro server with Windows Server 2012 used as NAS with RAID1 which crashed and after reboot half or the disk has gone either failed or missing, I did manage to get all of them fixed ...
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24 views

ISCSI Targetcli backstores fileio attach an existing image file

I can't seem to find an answer to this simple question. How do I attach an existing raw image file as an iSCSI backstore target using targetcli? I am using CentoOS 7. In targetcli I can get into ...
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20 views

Can't access drobo Pro via iscsi on new subnet

We have a Drobo Pro on our subnet which works fine via iscsi, however I am in the process of moving the servers over to a new subnet. I can access the Drobo with DroboDashboard via USB on my Mac and ...
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1answer
50 views

Active/Active MultiPathIO to two HP d2700s?

Our XenServer 6.5 hosts connect over ethernet to shared SAS storage via a single Linux based HP DL360 G6 "bridge". This single StorageServer bridges ethernet to SAS and shares out via an iSCSI ...
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2answers
37 views

LENOVO PX12-450R RAID configuration + general advice

I have a Lenovo PX12-450R NAS device with eight 3TB 7.2rpm drives. The device has a Quad-Core 2.5GHz Xeon CPU + 8GB DDR3 RAM. I have 4 gigabit NICS bonded. I am looking to use it to be a target for my ...
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1answer
26 views

ISCSI, MPIO and Target-IPs

Today I played around with ISCSI, MPIO and performed some tests. Some went as expected, someothers delivered results I cannot explain. The Test-Environment was 2 virtual machines, named A and B. ...
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19 views

Sharing iSCSI from one NIC to another on same machine

I have a Windows 2008 system with 2 NICs. One NIC is connected directly to an NAS (NIC1), and the other NIC is connected to the general network (NIC2). I am trying to share a iSCSI connection from the ...
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1answer
62 views

Mounting 40 iSCSI HP 3PAR SAN volumes in single CentOS7 server

I need to mount 40 HP 3PAR SAN volumes iSCSI LUN/target in single CentOS7 server that run nginx, each volume size is 8 TB, and that 40 mount points need to appear as single share path. Does such ...
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2answers
52 views

Is a switch is an iSCSI “mode” required for iSCSI targets?

If I have a switch, nothing special set up, just regular traffic, no jumbo frames, no special iSCSI set up, can I still have iSCSI traffic, say from a Windows machine using the iSCSI initiator and a ...
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21 views

EMC NS-480 Celerra - Way to verify which iSCSI initiators are currently connected to a LUN?

In the NS-480 or a given Celerra NAS, is there a way to verify which iSCSI initiators are actually CURRENTLY CONNECTED to a given LUN? I can see how to look at the LUN MASKs in Unisphere and see ...
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42 views

wbadmin discardes complete backup history after dynamically resizing virtual **source** volume

A customer SBS2011 (Windows Server 2008 R2) is incrementally backuped using wbadmin. The system ist hosted on a VMware ESX 5. We dynamically increased the size of one of the volumes which is backed ...
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35 views

Windows Server Backup - iSCSI and USB Drives

Been using S2012R2 built in backup for a while with great success now, using a single USB3 external drive for daily backups. (1.6TB data approx). We're now looking to add an offsite backup, where we ...
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27 views

LVM File Systems created with multipathed ISCSI storage LUNs are automatically going to Read-Only mode

I am using my RHEL 5 server with SAN LUNs to take the backup of my domain mails of all the users. For the redundancy, I configured multipathing for those LUNs. For scalability, I used those ...
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77 views

Synology DS1813+ RAID 5 with iSCSI IO wait perfomance issue

I'm have RAID 5 on Synology DS1813+ (DSM Version: DSM 5.0-4493 Update 4) with 8 ST4000DM000-1F2168 disk, usind as NAS and iSCSI/NFS targer for ESXi. In low read/write rate from disk have more io ...
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61 views

iSCSI opcode[89], error(-65539)

I have error iSCSI target (Synology DS1813+) used as NAS: Jan 19 12:03:55 SRV1 kernel: [23311947.266497] iSCSI: iSCSI: EPIO[/volume1/@iSCSITrg/iSCSI_3_Extent_LUN-LUN1_000], opcode[89], ...
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49 views

RHEL: iscsiadm is not able to login in any port except 3260

Discovery is successful: [root@ncdqd0110 iqn.11351.com.xxx:AAA]# iscsiadm -m discoverydb -t sendtargets -p 127.0.0.1:54541 --discover 127.0.0.1:54541,-1 iqn.2495.com.xxx:AAA Login is failing: ...
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18 views

Unable to see the iscsi luns given from a second target server to the same initiator on RHEL

I configured a target server on RHEL 6.7 and provided the LUNs for a machine running on RHEL 5.4. After few days, the storage on the target server is completed and I configured another target server ...
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95 views

Xenserver 6.5 (Open Source) VDI per ISCSI LUN (ZFS ZVOL)

In Xenserver 6.5 (open source edition) I want to create VMs with VDIs that are actually iSCSI LUNs shared by a CentOS 7 SAN which are in fact ZFS ZVOLS (the last part should not matter). My problem ...
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61 views

Unable to view LUNs exported on Linux via fibre switch brocade from IBM San Storage

I have problem mapping LUNs to my linux box from IBM San Storage Configuration: Host: Debian wheezy Host: Fibre controller QLogic 4Gb dual port DS4700 San Storage using Storage manager 10 brocade ...
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ISCSI intiator displaying the ISCSI target even after its removal on ISCSI target server

I am running a ISCSI target server on RHEL 6.7 and sharing the storage for the ISCSI initiator server which is running on RHEL 6.5. I configured the below code in the /etc/tgt/targets.conf file of ...
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2answers
95 views

Xenserver, iSCSI and Dell MD3600i

I have a functional xenserver 6.5 pool with two nodes. It is backed by an iscsi share on a Dell MD3600i SAN, and this works fine. It was set up before my time. We've added three more nodes to the ...
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25 views

Server 2012 iSCSI target remains after deletion

I've got server 2012 as an iSCSI target, and a server 2003 (not R2) as iSCSI initiator. The initiator sometimes hangs and says "reconnecting..." and I think it's because an old target shows up, but ...
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28 views

ietd - spamming logs ietd: unable to connect (Connection refused) 2

I have a fileserver (debian wheezy, 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u3 x86_64 GNU/Linux) set up with open-iscsi, o2cb, ocfs2. 3 connected clients and the fileserver itself are working great, ...
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1answer
111 views

Access iSCSI block device, setup as ZFS volume on CentOS7 - won't automount on boot, hangs on reboot

I am running CentOS7 on a virtual instance at Softlayer. There is a block storage device available to the instance via multipath/iscsi I have successfully had this block device mounted as XFS. I ...
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1answer
31 views

Can I Migrate An iSCSI Initiator Name To Another Server?

I am working on upgrading a virtual appliance in a datacenter and the upgrade process is a drop-in replacement of an update VM, but also a different disto (Debian -> CentOS). I am stuck waiting on an ...
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222 views

iSCSI design options for 10GbE VMware distributed switches? MPIO vs. LACP

I'm working on expanding the storage backend for several VMware vSphere 5.5 and 6.0 clusters at my datacenter. I've primarily used NFS datastores throughout my VMware experience (Solaris ZFS, Isilon, ...
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28 views

ISCSI slow connection after reboot

I have a problem with my ISCSI storage, and hop you can help me to solve this problem. The system was made following this tutorial: https://help.ubuntu.com/community/HighlyAvailableiSCSITarget So i ...
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2answers
858 views

iSCSI target stuck reconnecting after server reboots

I've been having some ongoing issues with my iSCSI connection not reconnecting itself after the server reboots, as shown below: OS is Windows Server 2008 R2. The iSCSI device is for my SQL Server ...
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40 views

Dell M620 Windows 2012R2 Boot from iSCSI to PS6000 Issue

All QLogic drivers are current. The iSCSI initiator connects to the target and volume (of course there is no OS yet) when testing the boot. I've read the Dell Configuring Windows Server 2012 for ...
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58 views

Mirroring on external SCSI and iSCSI disks inside same volume group

On IBM P5 505 (maint level 5300-07) servers there is a concurently accessed external storage, which is connected using external Ultra320 SCSI port (DAS). External storage is detected as hdisk2 which ...
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35 views

How do I add an iscsi target to a windows initiator through stock cmd?

I have many Windows Servers that need to run headless but I need to add many iscsi targets to each of the Windows hosts. I already have the iscsi target setup and have access to IP address of where ...
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70 views

Maximum transfer rate iSCSI bonding vs multipath

I want to get the maximum tranfer rate with iSCSI from my virtual machine (Linux) to my Linux Storage Host. I don't know iSCSi well so I'm not sure which way is the best for performance. A: Just ...
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1answer
459 views

Disk IO Performance Difference — Hyper-V / CSV — Guest vs Host

I have two different Hyper-V 2012 R2 environments that use iSCSI to connect to their virtual machine storage. While the environments are different (one is all 10 GB whereas the other is mixed 1 GB / ...
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87 views

Xenserver 6.5 Live Storage Migration

In my xenserver environment I have an LVM over ISCSI storage repository (SR) and I have another SR which is an NFS share setup on a synology server. To be clear, all servers are in one resource pool. ...
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1answer
50 views

Server 2008 - 1st NIC's traffic stops when 2nd NIC is plugged in

I have a file server running Windows Server 2008 R2 with 2 NICs in the back. These are their configurations: Connection #1 Local Area Connection 10.1.37.6 255.255.255.0 [No Gateway] Connection #2 ...
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2answers
65 views

Migrating NFS server (Linux)

We have a NFS server (Linux) who stores files in a iSCSI disk array. This server is in production. The server and the array are very old and have to be replaced soon (the array is already in serious ...
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1answer
150 views

RHEL 7.1 iscsid fails to get target as networking doesn't seem to have started

I have 2 RHEL 7.1 VMWare vm's (server and client) connected on a private vmware network. They each have 2xe1000 nics using teaming. I can see the teaming works as expected. I've also configured ...
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1answer
102 views

disable multiple initiators connection using targetcli

I have setup iscsi target using targetcli to have some hard drives(block devices), and in "TPG authentication"(a unique useid and passwd for all initiator). When one initiator does discovery and ...
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1answer
145 views

iSCSI: lsscsi lists device but fdisk does not

How do I make freebsd show initiators a mountable target from a zpool? On a fresh install of FreeBSD 10.2 (hostname bohr) I made a zpool named tank with a single vdev which is 2 disks in a mirror; ...
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1answer
61 views

Best practices for migrating to new SAN

My collaborator is splitting from his institute and wants help moving his application and data off the institute's network. And of course things are moving quickly. He has 12 TB of image data on a ...
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113 views

iSCSI Volume shown as two partitions on disk manager and need to merge/extend

I've just created a LUN and Target on my NAS, the from windows server, used iSCSI initiator to mount it. Disk appears in disk manager Disabled. Using diskpart i remove readonly attrib and created ...