iSCSI - SCSI over IP - mount disks across the network

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3k views

Unable to discover iSCSI targets

I have a trio of CentOS 6.4 machines that I'm trying to configure to use iSCSI. Basically two different initiators talking to two different targets on a single host server. On one machine, "the ...
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669 views

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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533 views

Windows Server 2012 - Hyper-V - iSCSI SAN - All Hyper-V Guests stops responding and extensive disk read/write

We have a problem with one of our deployments of Windows Server 2012 Hyper-V with a 2 node cluster connected to a iSCSI SAN. Our Problem Our problem is that for some reason all of the VMs stops ...
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45 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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6k views

iSCSI issue; “the media is write protected”

i've got some serious issues with w2k8 r2 standard and iSCSI controller. i'm running dell server, connected via ethernet to synergy NAS, which is handling LUN via iSCSI. i'm using ms iSCSI initiator ...
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12 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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28 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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33 views

Automatically build kernel modules after unattended upgrades in ubuntu

For automatic upgrades I has installed unattended-upgrades package and configured it. After each unattend kernel upgrade I must run following commands to recompile iscsi kernel modules: apt-get ...
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1k views

XenServer 6.5 iSCSI MPIO with point-to-point links (without a Switch)

I'm doing some experiment with iSCSI MPIO between FreeNAS 9.3 and two XenServer 6.5 hosts. I would like to use iSCSI MPIO to serve as VM storage. Pretty common environment, but without a switch to ...
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443 views

Booting a diskless Debian system using bonding, bridging, and iSCSI

I'm trying to build my personal holy grail: booting my Debian Wheezy KVM server diskless from a iSCSI target and the only configuration needed on the diskless server is the iSCSI parameters in the NIC ...
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625 views

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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985 views

Trying to boot a diskless server to Windows 2012 using iSCSI and Differencing VHDs

We are in the middle of a big VMware to Hyper-V migration at the moment. Part of this process is going to be changing some of our existing ESXi servers to Hyper-V. These ESXi servers don't have hard ...
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2k views

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

We set up a backup server (Windows 2008 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 ...
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694 views

FreeBSD istgt - how to limit iscsi target discoverability to IP address

How can I setup an ISCSI target that is only visible to a certain IP address? For example, if a client runs iscsiadm discover from 10.1.1.130, I only want target iqn.2011-03.domain.org.istgt.ded130 ...
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24 views

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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22 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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15 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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50 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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190 views

VMWare ESXi and iSCSI via FreeNAS

I've recently been setting up a sandbox ESXi environment with a VM running FreeNAS providing a volume which is connected as a datastore on the host via iSCSI. I've created a VM on this datastore and ...
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15 views

Source IP of VMware storage paths

I have an iSCSI array that is working fine with my VMware host. I'd like to disable several paths because they don't have end-to-end jumbo frames. For the life of me I can't tell what the source IP ...
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133 views

Linux iSCSI - Limit max concurrent sessions

I would like to understand if, and how to, limit the maximum number of simultaneous connections to a specific LUN under CentOS Linux, both with the old iSCSI stack (tgtadmin and friends) and the new ...
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36 views

iScsiPrt errors preventing system from returning from display rest

I am encountering a weird error in Windows 7 x64 Ultimate SP1. At random intervals, when coming back to the computer after being away long enough for the screen to rest, it will instead come back to a ...
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848 views

iscsi not working after host reboot

I have a host that is acting as both an iscsi initiator and target. It's an OpenStack box that acts as both the storage node (cinder) and also as a compute node. There is also another compute nodes on ...
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141 views

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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82 views

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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117 views

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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297 views

Adding external datastore to esxi, expanding datastore

I have an esxi 5.1 on a 1U server, accessed using vSphere. There are two 160G HDD's inside on RAID1. I'm looking to expand the number of VM's and the required storage is going to exceed this paltry ...
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222 views

Vmware Nas slow transfer rates/IOPS

I have built a test environment with a Synology RS812+ and an old HP140 server which has a gigabit nic installed. I have dedicated one nic to the network to DHCP and the direct to NAS from the server ...
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859 views

windows2012 failover cluster + storage. Considerations

We plan to build a failover storage with Windows2012r2. There will be 2 or 3 physical machines with 2 virtual machines on each server. One virtual machine building a failover, second one being storage ...
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145 views

Upstart task to wait for iscsi target to become available?

I've got a couple of virtualization servers running Ubuntu 12.04 and Virtualbox and just bought a Synology NAS which I plan to use as an iSCSI target to serve storage for the VMs. I realize that ...
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147 views

share an iscsi target thru samba

i just built an Openindiana/Napp-it box and i dont really want to get into Solaris ldap client setup. Does it sound doable to create a linux vm, set up samba on it, then connect to an iscsi target ...
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1k views

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: ...
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842 views

iSCSI connection is gone and when reconnected drive can't be accessed anymore on Windows 2008 R2

My client has QNAP library that I've used to share 2 iSCSI connections. One to physical machine and the other to virtual machine on top of that machine. One is 4TB (connected to physical machine) and ...
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419 views

Problem installing Microsoft iSCSI initiator on Windows 2003

Anyone got any idea what this is about: "Windows iSCSI200 has detected one or more protected files on your computer have been modified". I'm guessing that a service pack or Windows update has ...
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612 views

Replacing LeftHand SAN Hard Disk Outside of Warranty / Service Contract

I am working with 3 clusters of LefHand SAN iSCSI storage arrays. The modules are all older NSM 150s and NSM 160s (super micro server hardware, sata disks). The workload is low priority and all ...
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16 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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19 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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10 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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26 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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11 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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43 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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16 views

Linux, fiber switch brocade and IBM san storage connectivity

i have problem connecting my linux box to IBM san storage here is the configuration Debian wheezy Fibre controller QLogic 4Gb dual port DS4700 San Storage using Storage manager 10 brocade fiber ...
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23 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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31 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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59 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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130 views

Ubuntu 14.04 iSCSI initiator auto login

a few minutes ago I had to solve issue with initiator autologin. My software stack is: Ubuntu server 14.04, open-iscsi, open-iscsi-utils and multipath-tools. The symptoms are very simple. After ...
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150 views

Seriously confused by SMB and iSCSI clustering

I am trying to configure my storage server(only 1 node for now, more to come)for SMB shares so that my separate Hyper-V nodes can use the storage server disks for shared storage. I decided to go the ...
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72 views

How can I specify the devices for an iscsi target?

I have an AWS Storage gateway that exposes two iscsi targets. I am attaching them to an EC2 instance running Amazon Linux: iscsiadm --mode node --targetname gateway.com.amazon:volume1 --portal ...
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86 views

Setup iscsi target without CHAP failure

I have been trying to connect to the Target with no luck. I can see the iqns but authentication fails. I checked the config files for CHAP and its disabled by default. ...
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65 views

Install SLES11 sp3 on HP BL460c Gen9 server with 650 FLB controller

I am trying to install SLES11 sp3 on HP BL460c Gen9 server with 650 FLB controller connected to a SAN over iSCSI, I need to install SLES on the remote SAN On the Disk Activation page while ...