Questions tagged [iscsi]

iSCSI - SCSI over IP - mount disks across the network

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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 14....
2 votes
1 answer
371 views

Freenas is slow - network @ 400MB/sec, disk @ 150MB/sec

I have a 16 core virtualization FreeNAS 11.3-U4.1 instance running on Hyper-V with 32GB of RAM with a 18TB iscsi target on DELL T630 server grade hardware. HDD are on IT mode from the RAID card, so ...
1 vote
0 answers
184 views

Prevent LVM from activating all LVs upon connecting SAN storage?

We have a cluster of Proxmox VE servers with shared SAN storage. The storage server provides a big LUN through iSCSI. We use iscsiadm on the PVE hosts to load the storage. Per our workload, we setup ...
4 votes
4 answers
8k views

which Linux iSCSI target support SCSI 3 Persistant reservations?

looking for Linux iSCSI target software that support SCSI-3 persistent reservations? isci enterprise target tgt: scsi-target-utils open-iscsi
5 votes
3 answers
599 views

"Bad message" with a new SAN using multipath and iSCSI

I'm configuring a new SAN for a set of Ubuntu 18.04-based servers. Each of nodes can mount the ext4 formatted partition fine. Being new to both multipath and iSCSI, I'm not sure if what I'm seeing is ...
1 vote
0 answers
115 views

How to properly connect to AWS LUN storage?

Recently I configured my LUN storage on the AWS, allowed TCP and UDP connections from my PC, made a port (3260 for iSCSI) forward rule to my local VM, allowed iSCSI firewall rules on both machines but ...
3 votes
2 answers
53 views

How to properly setup VMs for testing (personal test) [closed]

So both of my testing VMs are on the same laptop and both of them are running Windows Server 2019 and both of them are on the same SSD. Basically, I need to test performance when the SQL database is ...
0 votes
1 answer
3k views

Docker Swarm iSCSI

I'm currently trying to setup a HA infrastructure capable of hosting a Symfony APP. This project is for school purposes. The requirements are the following : We have to use a SAN based model to ...
0 votes
1 answer
307 views

BTRFS Multiple Initiator Access

Can't seem to find this noted anywhere. Is BTRFS capable of being accessed over iSCSI by two hosts at once? (Think how esxi hosts access same datastores)
4 votes
1 answer
1k views

iSCSI devices added to storage server during DPM 2012 SPI backups

We have a Windows Server 2012 Failover cluster running a number of virtual machines. Storage for the cluster is provided by a Windows Storage Server 2012 instance and mapped to the nodes via iSCSI. In ...
1 vote
0 answers
149 views

Unable to write/mount disks with iscsi reservation and multipathd. Using Pacemaker and iscsi fence agent

I have two iscsi target servers in a pacemaker cluster connected to a Dell MD1200, I can get the scsi reservations recorded with the multipath.conf key configured in each server, but I can't write to ...
1 vote
1 answer
4k views

iSCSI target volume does not show on Windows 7 iSCSI Initiator

I have a Windows VPS sitting in a DC and another Linux box sitting in another data centre. My Windows VPS (running on Windows 7 64 bit) have a small hard drive and cost a lot to upgrade, and the Linux ...
3 votes
1 answer
737 views

Booting a SuperMicro from virtual iSCSI CD-ROM

I correctly set up the iSCSI server with SCST, I can login to the target via iscsiadm and mount the iSCSI resource, a CDROM based on ISO image exposed as LUN 0. When I try to boot a SuperMicro X10DRi-...
2 votes
0 answers
1k views

iPXE sanboot starts slowly with " Did not receive response to NOPIN on CID"

Environment: - CentOS 7 with kernel 3.10.0-1062.18.1.el7.x86_64 - targetcli version 2.1.fb49 - isc-dhcpd-4.2.5 - iPXE version 1.20.1+ and 1.0.0+ I have a CentOS 7 server which can serve Window ...
5 votes
1 answer
1k views

ISCSI and Windows Server 2019

I have 2 servers Main one is acting server the other one is providing HDD as ISCSI to main server. Purpose of this setup is Media Streaming sometimes there is transcoding involved. In application I ...
2 votes
1 answer
1k views

How To Upgrade Network Driver To BNX2i

we have a server with a Broadcom NetExtreme II card which supports iSCSI offloading. According to the dell documentation, we need to be running the bnx2i driver to use the iSCSI offloading engine. We ...
16 votes
1 answer
93k views

Howto show connected targets in Linux?

When I do localhost:~# iscsiadm -m discovery -t st -p 192.168.0.4 192.168.0.4:3260,1 iqn.2004-04.com.qnap:ts-509:iscsi.linux02.ba4731 192.168.0.4:3260,1 iqn.2004-04.com.qnap:ts-509:iscsi.linux01....
14 votes
1 answer
6k views

Linux goes to swap while plenty of RAM installed

I have a linux box that is used as SAN storage. It is equipped with 14 SATA HDDs and the only software it run is iscsi target and zabbix agent. This is physical box, not VM. The RAM size installed is ...
0 votes
1 answer
209 views

Mixed ocfs2 clusters: direct access and iscsi

Good morning, I have this configuration: diagram of configuration One "shared disk" with one partition formatted as OCFS2 Host A and host B with direct access to the "shared disk" Host C with direct ...
1 vote
0 answers
372 views

iscsiadm deletes configured CHAP credentials; how to prevent this?

I have a home lab set up with libvirtd and iSCSI. I have most issues worked out/around but there's one issue that still puzzles me. I can't find an answer on Google or serverfault.com. Often when ...
4 votes
1 answer
2k 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 ...
1 vote
2 answers
5k views

iSCSI as KVM storage backend: best practice concerning targets and LUNs per VM

I'm using an iSCSI pool as the storage backend for a couple of virtual machines and I was wondering how other people use targets and LUNs in this use-case. I started out with one target called iqn....
3 votes
2 answers
17k views

How can I determine if an iscsi device is a mounted Linux filesystem?

EDIT: This is on a Debian 7 sytstem (more accurately Proxmox hypervisor https://www.proxmox.com/en/) 2.6.32-48-pve kernel. I have a disk partition as an iscsi target on my backend infiniband storage. ...
0 votes
1 answer
216 views

vCenter moving VM from ISCSI target to different ISCSI target

In my server lab, I am running a vCenter cluster with 2 ISCSI targets. Both of these are directly connected to switch using SFP+ port. I assume, when I do such a process as cloning a VM from one ...
0 votes
1 answer
1k views

Unable to mount iSCSI shared Datastore on VMware ESXi

I had an iSCSI Datastore mounted and now am unable to remount it. There are 2 shares one of which is new and I want to copy the data from the old to the new. I have created a new datastore with the ...
0 votes
2 answers
619 views

CentOS can't boot because of iSCSIconnection not established

I have a CentOS 6.5 with a iSCSI disk connected. This disk is mounted as partition. Everything is working fine but after I tried to reboot, the system won't boot. It can't mount the partition /dev/...
0 votes
0 answers
439 views

I'm not be able to add LVM partition in iSCSI shared storage

Hey guys currently I'm using proxmox 6.1 and i have created a cluster for high availability. I have one shared iSCSI storage from NetAPP, i want to create a LVM on that iSCSI storage but its asking ...
0 votes
1 answer
219 views

DAS with MD3420 or iSCSI with MD3820i

Would there be a significant difference between these 2 setups? 2 esxi hosts connected MD3420 via SAS cables and HBA 2 esxi hosts connected to MD3820i via CAT6 cables without switch. How much ...
2 votes
0 answers
63 views

I'm getting error during HA configuration for KVM on CentOS

After adding all nodes and resource agents in my cluster I'm getting this error please someone suggest me something. Please take a look in the image-
1 vote
0 answers
36 views

HA configuration for KVM Guest on iSCSI shared storage [duplicate]

My requirement is to provide HA to a Zimbra Server. We want Zimbra files to be installed in a Netapp SAN which is providing around 5.7 TB as a SAN iSCI Drive. Since Netapp comes in with Dual ...
4 votes
1 answer
932 views

HA configuration for KVM machines installed on shared iSCSI storage

My requirement is to provide HA to a Zimbra Server. We want Zimbra files to be installed in a Netapp SAN which is providing around 5.7 TB as a SAN iSCI Drive. Since Netapp comes in with Dual ...
3 votes
1 answer
465 views

multipath on iscsi target is it posible?

Is it possible to configure multipath on target iscsi SAN? I configured multipath on vmware iscsi initiator and it's work but bouth flows goes on the one SAN storage port with the IP but is it posible ...
2 votes
0 answers
442 views

"Getting devices ready" on Windows 10 while booting VM/iSCSI on another machine than initially set up

TL;DR version: virtual Windows instance reinstalls GPU drivers while switching to other hosts despite the fact it's getting the same hardware all the time. I'm trying to avoid it / shorten its time ...
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 ...
1 vote
0 answers
647 views

Emulex OneConnect 10Gb Network Unclaimed

As a novice im hoping to gain a helping hand, Ive recently switched from windows server 2019 over to Centos 7 and the server has a 10gb Emulex OneConnect nic / card installed. When using windows i ...
1 vote
0 answers
125 views

ISCSI MPIO Extra devices, and is there meant to be an mpath0-part2?

I am trying to learn more about ISCSI and Multipath (MPIO) setup on a proxmox system. I thought I had everything working, but have that terrible spidey sense that something is incorrectly configured, ...
7 votes
2 answers
2k views

Should I bond iSCSI network connections?

I'm setting up some iSCSI storage (Lenovo) along with a physical server running RHEL7. The server has 2 NICs for the main LAN (bonded) and 2 NICs for the iSCSI network. The Lenovo storage has 4 ports ...
1 vote
1 answer
796 views

iscsi target shows up with multiple partitions - why?

We've been using CentOS 7 for a couple of years now to serve up iSCSI targets to our TigerStore metadata server on our SAN. We've used the same procedure to create the targets, detailed below. I just ...
2 votes
0 answers
363 views

Windows 2012 R2 SCSI UNMAP failure

I have a very strange situation. I have a Windows 2012 R2 VM with mounted thin provisioned LUNs located on a NetApp FAS2552 filer (running cDOT 9.4P2), and the server is not sending SCSI UNMAP ...
4 votes
1 answer
5k views

How to fix slow iSCSI speed (in comparison to SMB)?

I have a NAS which provides SMB and iSCSI targets, and a server which is directly connected via a 10 GbE link (no switch in between). I experience slow speeds with the iSCSI target in contrast to "...
2 votes
3 answers
1k views

Debian 7: HA NAS with pacemaker, drbd and iSCSI

I currently am trying to make a highly available NAS under debian 7. I am using following packages: drbd8-utils iscsitarget iscsitarget-dkms pacemaker corosync openais ...
0 votes
1 answer
211 views

Real time storage for mutiple ISCSI Initiators

I have 3 Window Servers that acts as an initiators that connect to a same target through ISCSI and gain storage from it. Is there anyway to, if one server change the storage data, other can see and ...
1 vote
1 answer
423 views

Microsoft iSCSI initiator- Automatically connect to another target if the first target suddenly become unavailable

I am trying to configure 3 Virtual Machine, all are window server 2016. One as an initiator while 2 others act as targets. Is there a way to automatically connect to the other target when the first ...
11 votes
3 answers
14k views

iSCSI, multiple initiators for the same LUN

I have a web application that is distributed over 3 servers. These 3 servers need a shared storage to access files. Since iSCSI is just a protocol, not a filesystem, it will not have any ...
7 votes
3 answers
35k 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 ...
0 votes
0 answers
1k views

iSCSI Initiator: Targets Lost Server 2012 R2

I rebooted my servers last night after do a routine cleaning. When they came back online I saw my network maps had not reconnected so I investigated. Opening the iSCSI initiator screen every action I ...
-1 votes
2 answers
171 views

ISCSI and SAN scaling

The Problem: I have a photography studio, and I ran into a problem when I just ran out of space on a monthly basis. Every month I just purchased additional HDD for a file server. now I have approx 120 ...
1 vote
1 answer
249 views

iSCSI LUN from Centos mapped to xenserver is keep on disappearing

I'm trying to set up an ISCSI box for shared storage to connect to my xenserver environment. I am using Centos 7 as iSCSI storage. I am using targetcli for iSCSI configuration. I can set up ...
0 votes
1 answer
202 views

Can you mix 10gb and Infiniband for iScsi storage target

I'm setting up a Fedora server to act as an iScsi storage target. The primary storage network will be 25gb Infiniband. Is it possible and/or safe to also allow the target to be accessed by 10gb ...
0 votes
0 answers
84 views

Can (and when) split brain occur on failover cluster with 2 nodes and disk witness?

we have a two node cluster with a shared disk quorum (iscsi). we are experiencing every now and again failures that are resulting in downtime. In the logs we see the 'conflict IP' on the shared ip, ...

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