Questions tagged [iscsi]
iSCSI - SCSI over IP - mount disks across the network
860
questions
0
votes
0
answers
14
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 ...
0
votes
1
answer
39
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 ...
2
votes
4
answers
111
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 ...
1
vote
0
answers
42
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 ...
5
votes
3
answers
822
views
iSCSI multipath: should I keep all portals configured, even unreachable ones?
Sometimes when you connect to a multipath'ed iSCSI target you will have access to only some of its portals. This is common when the initiator is directly connected to the target's ethernet ports, as ...
0
votes
1
answer
488
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I see paths that are no longer valid along with valid ones.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 ...
1
vote
1
answer
50
views
iSCSI LUN on client - ready only permission
I have used targetcli to create a LUN.
See my config:
o- / ......................................................................................................................... [...]
o- ...
2
votes
2
answers
198
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 ...
1
vote
2
answers
103
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 ...
0
votes
0
answers
62
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 ...
10
votes
1
answer
7k
views
Poor iSCSI performance with SSD disks and 10 Gbe network
iSCSI Target
Ubuntu 14.04 (Trusty Tahr) with 16 GB RAM and 16 core CPU as LVM backed iSCSI target using three Samsung SSD disks, each capable of doing 65k IOPS using an LSI 6 Gbit/s ...
3
votes
6
answers
9k
views
iSCSI Distributed RAID?
Thinking about setting-up as distributed RAID array over iSCSI. Has anyone else tried this, if so what was your experience.
To be more specific I am thinking of a couple of CentOS servers each with ...
7
votes
1
answer
5k
views
Can't boot Windows Server 2012 from iSCSI
I'm working out how to install various OSes onto diskless servers to be run via iSCSI. The servers have no special hardware for this (no iSCSI HBAs etc.)
I briefly played with Windows Deployment ...
5
votes
1
answer
2k
views
Slow ISCSI performance on Windows 10
So i have this diskless / pxe booting environment with 28 clients using a program called ccboot. Client is using kabini based board A68n-5200
Essentially it's 28 clients communicating using ISCSI ...
1
vote
0
answers
647
views
Windows Server 2016 running off iSCSI BSOD after power loss
I've got a setup where I'm hosting the Windows Server 2016 images on a Solaris 11 ZFS SAN over iSCSI. These images began as baremetal installs then I used Clonezilla to clone them to the dedicated ...
4
votes
2
answers
2k
views
PAGE_FAULT_IN_NONPAGED_AREA when booting Windows 10 from iSCSI network drive
I am trying to set up Windows 10 for diskless boot via iSCSI, as described, for example, here or here.
I am able to run the Windows 10 installer to install Windows on the target iSCSI drive. However, ...
2
votes
1
answer
4k
views
ISCSI target service on Centos OS 7 errors
I have problem with ISCSI Target Utils. Service started normally, but showing errors:
systemd[1]: Starting tgtd iSCSI target daemon...
tgtd[3138]: tgtd: iser_ib_init(3436) Failed to initialize RDMA; ...
0
votes
0
answers
188
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 ...
3
votes
3
answers
343
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 ...
0
votes
0
answers
42
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 ...
5
votes
1
answer
395
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)...
1
vote
0
answers
146
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 ...
0
votes
0
answers
19
views
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 ...
0
votes
5
answers
8k
views
CentOS7 Targetcli Configuration lost after server reboot
Targetcli configuration got lost after server was rebooted, i tried to restore configuration from backup files with targetcli restoreconfig <backupFile> configuration is not restored output ...
3
votes
3
answers
451
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 ...
2
votes
1
answer
4k
views
how to determine the iscsi target's naa in linux
I understand that iSCSI uses iqn / eui to identify target LUN. Once I have discovered the iSCSI target and logged in is there a way to determine the LUN's NAA id for the remote target from a linux (...
2
votes
0
answers
1k
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 ...
2
votes
1
answer
220
views
Seeking iSCSI file copy flow clarification
I'm trying to diagnose a slow file copy issue but am a bit perplexed by the "behind the scenes" flow of data and am looking for clarification.
The server in question is a Windows 2012 server and it ...
0
votes
2
answers
137
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 ...
1
vote
1
answer
668
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® ...
3
votes
3
answers
3k
views
Long restart time of Windows due to iSCSI Connection
On Windows 10 machine, right after iSCSI Initiator is setup to connect to drive rebooting of Windows takes ages. What usually was taking 5 seconds, it's now taking a minute. It doesn't matter if drive ...
0
votes
1
answer
169
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/...
0
votes
2
answers
1k
views
Connecting to 2 iSCSI targets on same NAS
I have a NAS device with 2 iSCSI LUNs.
These LUNs will only ever be used with one server so no switch is involved. I simply ran a Cat6 cable from a 10GbE port on the Server to a 10GbE port on the NAS....
-1
votes
1
answer
1k
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-...
1
vote
2
answers
321
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 ...
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 ...
0
votes
1
answer
2k
views
SSD cache for ISCSI block mode drives possible?
I have Debian based Openmediavault 3.0 distribution with iscsi plugin based on ietd. Among others, I use it to serve several disks as ISCSI block mode for VMWare servers. It works, however it is ...
3
votes
0
answers
2k
views
The driver detected a controller error on \Device\Harddisk0\DR0 on a virtual machine
The event in question is generated by a virtual machine.
The disk 0 is a scsi connected drive to the virtual machine.
The vhdx file is in the hyper-v cluster which has the storage from SAN cluster. ...
2
votes
1
answer
2k
views
Cluster Shared Volume Owner Node After reboot
Problem:
In a failover-cluster (Hyper-v) the CSV (iSCSI) gets "pulled" to the node that just restarted (after updates) when i don't want it to.
I can not find any setting defining CSV owner ...
4
votes
4
answers
16k
views
open-iscsi does not login into targets on boot
We have a Debian Lenny server with open-iscsi that's configured to log into a target automatically:
hostname:~# grep \\.startup /etc/iscsi/iscsid.conf
node.startup = automatic
hostname:~# grep \\....
2
votes
1
answer
767
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 ...
1
vote
1
answer
3k
views
Unable to create iqn at targetcli?
I want to make a san on my virtual machines, I have already configured a server1 as Server target with theses steps:
- create lvm on server1
- install targetcli
- create blocks
- create iqn using: ...
3
votes
4
answers
46k
views
iSCSI Transfer Rate Using Standard Gigabit Networking
We just purchased a dell storage server with (12) 7200 RPM SATA drives running RAID 10 and (4) gigabit network interface cards. Additionally it has a PERC H700 controller card with 512MB of on-board ...
0
votes
1
answer
223
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
...
0
votes
0
answers
37
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 ...
1
vote
0
answers
88
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 ...
3
votes
2
answers
11k
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 ...
1
vote
1
answer
1k
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+...
29
votes
4
answers
47k
views
Testing whether jumbo frames are actually working
Is there a command to test whether jumbo frames are actually working? i.e. some sort of "ping" that reports whether or not the packet was broken up along the way.
I've an ESXi host with an Ubuntu VM ...
1
vote
1
answer
755
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 ...