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Questions tagged [iscsi]

iSCSI - SCSI over IP - mount disks across the network

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iSCSI LUN Unrecognized During High Usage by Proxmox Guest VMs

I'm experiencing an issue with my Proxmox setup where the iSCSI LUN becomes unrecognized during high usage by guest VMs. The VMs have their disks backed by this iSCSI LUN. Initially, everything works ...
cyberquarks's user avatar
1 vote
1 answer
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ISCSI initiator: the GUID passed was not recognized as valid by a WMI data provider

Windows Server 2019 Hyper V host. Software MSiSCSI initiator connects to ISCSI target for backups. Worked fine for years. Backup failures started a few weeks ago with ISCSI errors. I removed the ...
corradolab's user avatar
1 vote
1 answer
47 views

Issue with Creating iSCSI Portal on TrueNAS SCALE

I am experiencing an issue with creating an iSCSI portal on my TrueNAS SCALE system using the IP address "192.168.10.14". Despite multiple attempts and troubleshooting steps, TrueNAS does ...
cyberquarks's user avatar
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0 answers
108 views

Error creating LVM - create storage failed: command '/sbin/pvs --

How to work around this error (when trying to make an LVM): create storage failed: command '/sbin/pvs --separator : --noheadings --units k --unbuffered --nosuffix --options pv_name,pv_size,vg_name,...
cyberquarks's user avatar
0 votes
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Proxmox Unable to Connect to TrueNAS iSCSI Target Using CHAP Authentication

Problem Description: I am experiencing persistent issues connecting my Proxmox server to a TrueNAS iSCSI target using CHAP authentication. Despite configuring both TrueNAS and Proxmox according to the ...
cyberquarks's user avatar
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46 views

Persist iSCSI RAM drive across reboots

To create a RAM disk on Windows Server, I used a tutorial at https://i12bretro.github.io/tutorials/0524.html and created a scheduled task with a powershell script, as suggested in its 2nd half. ...
SuperAl's user avatar
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3 votes
2 answers
81 views

Moving VHDX file attached to Failover Cluster "iSCSI Target" role with no downtime?

Good day, The setup: I have a Failover Cluster, each member of which is attached to a shared storage of two LUNs - LUN1 and LUN2. LUN1 hosts a large VHDX file (of several terabytes) assigned to the &...
Cat Mucius's user avatar
5 votes
1 answer
100 views

can't see iSCSI with lsblk

I've configured a freeNas with iSCSI and two nodes connecting to that device. Everithing it's ok but after reboot I can't see with lsblk: lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda ...
Miguel7799's user avatar
3 votes
2 answers
201 views

Moving Windows file server contents from one iSCSI LUN to another

Good day, I have a fileserver role on a Win2016 Failover Cluster backed by an NTFS volume on an iSCSI LUN. I need to move its contents to another iSCSI LUN, on another block storage system. The ...
Cat Mucius's user avatar
4 votes
4 answers
303 views

How to get an IP address of iSCSI initiator which tries to connect

There is a Windows Server with iSCSI target configured, and the event log keeps filling with the message like this: iSCSI initiator iqn.1994-05.com.redhat:bdbcb04e20b1 requested an invalid iSCSI ...
Nikita Kipriyanov's user avatar
1 vote
0 answers
228 views

iSCSI connection from Ubuntu server fails/timeouts when booting

we set up an Ubuntu server (22.04.3 LTS) to use as a Veeam Repository. We want to connect a LUN on a NetApp storage via iSCSI. The setup itself went without a problem till the server had to be ...
Christian Herzyk's user avatar
1 vote
1 answer
79 views

iSCSI LUN on client - ready only permission

I have used targetcli to create a LUN. See my config: o- / ......................................................................................................................... [...] o- ...
Sven Kirsten's user avatar
0 votes
0 answers
117 views

Emulating a DVD recorder via iSCSI using tgt on Linux, Windows client can't record

I'm attempting to emulate a DVD+R recorder using the "tgt" iSCSI target daemon in Ubuntu 22.04 (the version in Ubuntu's repository, which is 1.0.80). I've configured it by creating an empty ...
Jules's user avatar
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2 votes
2 answers
322 views

Dell ME4084 slow speed with Intel E810 25G in Hyper-V Failover using iSCSI

PLEASE READ 3RD EDIT BELOW I am currently trying to figure out why the following server setup is getting me only slow speeds on SMB copys. The setup is the following: 2x Dell PowerEdge R7525 each ...
C0dR's user avatar
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311 views

How to force iSCSI disk refresh/rescan

I have a 3 node Windows 2022 cluster that is using iSCSI attached volumes. When I reboot the servers I get a ton of MPIO errors and it takes forever to see the disks. When they are seen in Disk ...
Eric's user avatar
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3 votes
3 answers
369 views

FreeBSD - Is it possible to create a clone of a snapshot in a different disk for improved performance?

I am a new to FreeBSD and want to make a virtual disk service via iSCSI. I create snapshots of a dataset on the same disks, however I would like to create clones on a different disk like a NVMe drive ...
Charles Kwon's user avatar
0 votes
0 answers
56 views

initiatorname.iscsi is overwritten

I use RHEL 8.8 on my machines. I run the following command: echo InitiatorName=$(/sbin/iscsi-iname) > /etc/iscsi/initiatorname.iscsi It sets correctly the name. But after some time file is set to ...
user148468's user avatar
1 vote
0 answers
221 views

Multi-node OpenStack with iSCSI storage

I’m trying to deploy a multi-node OpenStack environment using Kolla, Ansible, and Ubuntu server. I successfully added a partition to my Cinder storage using iSCSI. But I can't configure OpenStack to ...
Sofien's user avatar
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0 answers
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Distributed file system network booted hosts

Having task to utilize old servers as a backup distributed file system like MooseFS I see a collision in whole concept: DFS is fault-tolerant and keep track of HDD status by itself, so any file system ...
kab00m's user avatar
  • 518
5 votes
1 answer
571 views

How to use targetcli to disable iSCSI write cache

I have exported a single disk as an iSCSI target using targetcli on a Linux host. On a remote machine I have connected to the device, and placed a ZFS volume on it (as a replication target with zrepl)...
Malvineous's user avatar
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0 votes
1 answer
712 views

Non-valid paths in "multipath -ll" output

I see paths that are no longer valid along with valid ones. How do I prevent them showing up in the output. I expect four valid paths. The volume was earlier exported with LUN 13 and later 14 which ...
Hem's user avatar
  • 121
1 vote
2 answers
155 views

iSCSI shared disks with custom device name on clients

I'm using RHEL 7.9 (Maipo) and need to setup for all iSCSI clients the same device name, like /dev/sdb or /dev/thiscustomname. I could do that by sharing the source disk using multipath, but for Db2 ...
adamitj's user avatar
  • 115
2 votes
0 answers
2k views

Steps to succesfully persistent iSCSI LUN using Open-iSCSI on Ubuntu Server?

Using Ubuntu Linux Server 22.04 minimal edition without GUI, I need some help in mounting the iSCSI LUN using Open-iSCSI so it is mapped to /dev/sdb with the below command: Could you please let me ...
Senior Systems Engineer's user avatar
3 votes
3 answers
563 views

Linux iSCSI Target MCS

I have a Linux Server hosting an iSCSI target. The iSCSI Initiator is a Windows 10 Desktop When connecting with the Windows 10 Machine im unable to start MCS. (Too many connections) Windows also shows ...
iTimo01's user avatar
  • 31
0 votes
1 answer
191 views

Can't connect to other volumes (Dell Equal Logic SAN Headquarters)

Investigating an older server and disk array (Dell EqualLogic PS4100). The server has Dell EqualLogic SAN Headquarters onit. In Group Manager on the server I can see 5 out of 7 volumes as online/...
strj500's user avatar
1 vote
1 answer
821 views

Intel® iSCSI Remote Boot Intel X540-T2

I have an Intel X540-T2 Dual port 10GB Ethernet adapter. DEV ID: 8086/1528 I am trying to setup a workstation to boot from a SAN using iSCSI. Everything I have read about this card says that Intel® ...
Xylex's user avatar
  • 13
1 vote
2 answers
386 views

RHEL 8 extend iSCSI LUN without reboot

In short: I´m building computer systems with mounted iSCSI storage. Is it possible to extend the iSCSI storage in live operating without rebooting the systems? Details: One LUN is planned with 5 TB ...
STrike's user avatar
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-1 votes
1 answer
2k views

disk cache mode: "write back" vs "write through" in iscsi context

I have a few iscsi drives connected to a debian. The iscsi drive (sde,sdg, one for each path) and the multipath device (dm-25) have the "write_cache" property (/sys/devices/virtual/block/dm-...
user3615294's user avatar
0 votes
1 answer
60 views

Recommended IP ranges for Dev SAN with 2 x switches

I am setting up a small Dev environment with 5 hosts, 2 ubiquity switches and a qnap NAS. One switch for the normal TCP traffic and one for iSCSI. I was wondering the recommendation for management ...
Anthony Horne's user avatar
0 votes
2 answers
178 views

Why are workstations trying to access file server port 445 on the isolated iSCSI subnet?

I have iSCSI set up on an isolated set of switches in MPIO config. The file server VM uses all 4 ports on the host. 2 for iSCSI MPIO each plugged into a physically isolated switch that only has the ...
naps1saps's user avatar
  • 192
2 votes
1 answer
994 views

iSCSI Discovery Issue

I have an issue with iSCSI discovery. Just some background, I'm using Openstack Cinder and part of Cinder requires the use of iSCSI for networked drives. Cinder is unable to get the list of nodes ...
Elf's user avatar
  • 41
0 votes
1 answer
247 views

write back cache on network scsi disks

I have a machine in the cloud which has a persistent disk. For the host, it appears as a SCSI disk. I see the following seting: $ cat /sys/block/sda/device/scsi_disk/0\:0\:1\:0/cache_type write back ...
MK.'s user avatar
  • 305
0 votes
0 answers
42 views

Proware SB-2124-G1A3 password reset

We have been using the Proware SB-2124-G1A3 device for more than 10 years. But now we have discovered that the administrator password is irretrievably lost. The official documentation describes ...
user1540017's user avatar
1 vote
0 answers
94 views

openstack nova have a long startup after the fast created volume

i have reinstalled OpenStack with the newest version (Yoga) and all base modules. The system is running fine but the time between the creation of the volume and the startup ist very long with ~10 ...
emil0815's user avatar
1 vote
1 answer
2k views

VMware vSphere 7.0 U3 + TrueNAS Core 13.0: can't create VMFS6 datastore from TrueNAS iSCSI disk. Why?

I have a bare metal server running vSphere/ESXi 7.0 U3d, and a bare metal NAS running TrueNAS Core 13.0. The NAS has a single pool shared via iSCSI; the pool is running all defaults (lz4 compression+...
pants_towel's user avatar
1 vote
1 answer
845 views

iscsid broken mount after recovery

I am playing with Open-iSCSI and came across some troubles. When the network link between my initiator and the target fails, iscsid will recover the connection, which is good. But my mount is broken ...
dna's user avatar
  • 111
1 vote
0 answers
19 views

Determining Required LUN Level Uniqueness

I have primarily used NFS for most of my storage needs but I find my self setting up some iSCSI targets today and had what is likely a super basic question. When I create an export for an iSCSI target,...
Sherlock's user avatar
0 votes
0 answers
170 views

Robocopy of folder redirection folders caused the volume to fill from ~1.5TB to the full 14T, as a result I cannot access the volume anymore

I'd appreciate some help resolving this issue. I was using robocopy to copy the contents from one iSCSI volume to another - moving folder redirection contents from the old to the new location. There ...
ex whywhyzee's user avatar
5 votes
2 answers
631 views

max iSCSI initiator session

what is iSCSI initiator session limit ? and is there anyway to exceed this limit ? i'm working on windows server also in this documentation https://docs.microsoft.com/en-us/windows-server/storage/...
User.. 's user avatar
1 vote
1 answer
1k views

Maximum number of iscsi connections

Is there a way to increase the maximum number of iscsi connections on windows to avoid this error? Connect-IscsiTarget : Exceeded max sessions for this initiator.
User.. 's user avatar
0 votes
1 answer
843 views

iSCSI separation from Ethernet via VLAN

I've set up a small cluster of a few servers along with a SAN. The servers are running Ubuntu 20.04 LTS. Using instructions provided by the vendor (I can't find where I read it before), they ...
Ray's user avatar
  • 167
2 votes
1 answer
8k views

Proxmox VE: add a LVM storage on top of iSCSI: how to find "base" value for pvesm

I'm using Proxmox VE platform, version 6 or 7, and I'm currently documenting the initial setup with the idea of automating it later. So I'm looking for all command line commands to do all that I must ...
daks's user avatar
  • 673
3 votes
1 answer
433 views

ext4 errors with dm-crypt / LUKS on top of an iSCSI device

I have two oldish "NAS" devices, specifically Buffalo TeraStation Rackmount iSCSI ("TS-RIXL/R5"). Those are basically embedded computers running Linux with four SATA slots and two ...
ftc's user avatar
  • 101
1 vote
0 answers
304 views

qemu (KVM) how to set iscsi timeout on?

I have opensuse 15.2 Leap on all systems qemu 4.2.1 # /usr/bin/qemu-system-x86_64 --version QEMU emulator version 4.2.1 (openSUSE Leap 15.2) Copyright (c) 2003-2019 Fabrice Bellard and the QEMU ...
sergey_s's user avatar
0 votes
0 answers
1k views

How to get iSCSI multipath work on Windows 10 , should I do any adjustment in linux server side?

I have 8x18TB Raid10 mdadm volume on Ubuntu server. When I connect from Windows iSCSI speeds 220MB/sec read 375MB/sec write. I guess it is a iSCSI protocol bottleneck could not improve it. It leaves ...
Gediz GÜRSU's user avatar
0 votes
1 answer
419 views

Boot diskless client from iscsi target

I have a Ubuntu server 20.04 setup to run the service as an iscsi target. I've accessed and mounted the target from a client (running Debian) and installed a Debian on the mounted block/device. Making ...
palias's user avatar
  • 1
4 votes
1 answer
600 views

Attach network disk as direct

Is where way to attach network disk as direct without creating VHD etc? I want to connect drive directly from one computer to other by network by like iSCSI but without creating VHD. Not acceptable: ...
Andy's user avatar
  • 41
1 vote
1 answer
682 views

Single host connecting to two iSCSI targets - Linux

I have one node set as initiator and two separate targets, each one on a different node. How do I connect to the second target on node? I'm trying to figure out how it should be done. My initiator ...
alfie.bondurant's user avatar
0 votes
1 answer
364 views

Proxmox iSCSI Boot?

Does anyone know how to install Proxmox over iSCSI so that it can be booted over the network? My current solution is to use USB flash drives, but would like a different solution. Thanks!
PrimeTech's user avatar
0 votes
0 answers
96 views

Is it safe to "Enable-MSDSMAutomaticClaim -BusType iSCSI" in an environment with multiple iSCSI-Targets?

I'm currently setting up a backup storage cluster (Acronis ACI) where I want to attach an iSCSI target to a Hyper-V host. The manual states to enable MPIO, which is fine. The next step is to enable ...
Kumi's user avatar
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