iSCSI - SCSI over IP - mount disks across the network

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3answers
113 views

Windows - mount network drive with client-side read/write caching from Linux storage server

Is there a way to mount network drive on Windows with client-side read/write cache enabled? In my case drive is guaranteed to be mounted by 1 user, and performance is way more important than ...
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1answer
890 views

iscsi TGTD gets continuous tgtd: conn_close(100) connection closed, 0x10b9288 1

I have a NAS server running tgtd on Centos 6. In my /var/log/messages, I an getting a constant entry every 3 seconds: Sep 26 22:21:24 san2 tgtd: conn_close(100) connection closed, 0x1143728 1 Sep ...
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1answer
3k views

iSCSI / SAN / Cluster / multiple NICs failover

Got a problem with NIC failover with iSCSI. Setup: A server with 3 NICs. One NIC is local network, other 2 are SAN. Using Microsoft iSCSI Initiator. A managed network switch. A QNAP SAN, connected ...
0
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1answer
53 views

SATA drivers in Debian squeeze

I have Debian Squeeze installed on a compact flash card in ATA port. I copied the whole system to SATA drive but system holds in initramfs because can't mount root file system. I know that my system ...
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0answers
357 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 ...
2
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2answers
959 views

Fine tuning iSCSI Initiator configuration in Windows Server 2008 R2

I've set up a 3 node cluster with Windows Server 2008 R2. I need to connect to these nodes a lot of lun (18 LUN on each node; not my decision... :( ). After digging a while with iSCSI Initiator ...
2
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0answers
27 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 ...
2
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0answers
55 views

Can't attach iSCSI with multipathing in Citrix XenServer

Dear people of the world. I have a problem reattaching an iSCSI target on XenServer after a reboot. Whenever I try, I get several errors. Here's me in the attach screen on the redundant storage ...
2
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2answers
68 views

iSCSI steps between 1Gb/s and 10Gb/s [closed]

So, I am in the process of building out a iSCSI system based off freeNAS. This is being connected to a few (around 20ish) ESXi 5.5 boxes. These ESXi boxes only have the boot drive and a few Gb of ...
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2answers
304 views

Bare metal boot over WAN? [closed]

Is there a service offering iSCSI/iPXE boot targets over the Internet? i.e. on a blank machine with an internet connection available to it, it can be configured to look at a public internet host and ...
1
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1answer
2k views

CentOS 6.4 iSCSI Target - crm shell error

I try to make a iSCSI Target on CentOS 6.4 with DRBD, Pacemaker, Open-iSCSI and LVM2. Now i need to prepare the HA iSCSI Target configuration on the crm shell, but if i enter the configure mode, ...
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2answers
229 views

10Gb ISCSI to 1Gb server port

I have this setup in mind. Md3800i 4 10GBps Iscsi. 2 del r730 4 1Gbps ports. I will use this storage to backups and low profile mass storage. So i don't won't to put HBAs in the server. ...
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0answers
4 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 ...
12
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2answers
29k views

LV Status: Not available. How to make it available?

I connect an iSCSI target, create a Physical Volume and Volume Group on it. Then I create an LV, and mkfs.ext3 /dev/vg00/vm and all that works great. Then I disconnect the target iscsiadm -m ...
0
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1answer
35 views

MySQL intermittently fails to come up when data directory is configured on SAN via iSCSI

I am running Ubuntu Linux 14.04.2 on a Dell R610 Server. This box is used to host the MySQL service for my applications. The MySQL data directory is mounted on DELL SAN Equallogic so this box is also ...
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1answer
1k views

ShadowCopy Error 7001 (Unable to create a shadow copy) but SC got created and works fine, what to do?

I'm running Windows Server 2008 R2 on a Dell R410. A QNAP NAS is connected to it via gigabit crossover. A 2.6 TB LUN is mounted via iSCSI as Volume Z:. A task should create Shadow Copies three times ...
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2answers
51 views

iSCSI or network share

Our new NAS has four network ports that are linkable and I would like to utilise that extra potential capacity. Should I; 1 - create an iSCSI volume, with its lower overhead, connect the main file ...
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3answers
1k views

How to crack the 1 Gbit iSCSI limit between ESXi and VNXe

I'm having big troubles with my iSCSI network and can't seem to get it working as fast as it could. So I've tried pretty much everything to gain full performance from my SAN, having involved ...
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0answers
21 views

How to automatically remount iscsi drive, after network errors on Vmware + FreeNAS

Is it possible to force Ubuntu to remount, rescan storage in time manner, to automatically mount it in rw mode? I have a Ubuntu virtual machine on VMware server. And have physical FreeNAS server ...
8
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1answer
519 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 ...
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1answer
63 views

Connecting Windows iSCSI initiator to Centos iSCSI target

Goal: To have my Linux VPS serve as an iSCSI disk for a Windows Why: Management of the storage space on a Linux box and to reduce cost of licensing. OS: Centos 6 (Target) Windows Server 2012 ...
0
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1answer
28 views

Storing backups on a remote filesystem

I have a FreeNAS solution, in which I'll would like to save my backups. Currently I was doing some scripting to rsync/tarball, but I want a something more easy to manage, so I figure out, to run a ...
4
votes
3answers
266 views

vSphere Datastore for specific datatypes: NFS or iSCSI

I am looking into improving performance in my vSphere environment. We are using a NetApp appliance with all VMs stored in Datastores that are mounted via NFS. It was suggested to me that, for some ...
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0answers
63 views

Can iSCSI and Internet work on same NIC? [closed]

I have a Synology RS815+ that supports iSCSI with 4 GbE ports. I have two Mac Mini's (2014) with built-in GbE and a TB to GbE adapter. All 8 connections are tied to the same switch, with client ...
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4answers
138 views

What trouble will I have when running a SAN past its support lifetime?

We are replacing a Clariion CX320 SAN because it is old (7.5 years). It has been otherwise very reliable. Yes, we have replaced a lot of disks, battery modules, and maybe even one of the ...
4
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9answers
2k views

InfiniBand Storage

I'm contemplating the next restructuring of my medium-size storage. It's currently about 30TB, shared via AoE. My main options are: Keep as is. It can still grow for a while. Go iSCSI. currently ...
0
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1answer
27 views

nova volume-detach fails silently, compute log shows libvirtError: invalid argument: no target device vdb

Using Openstack Havana, I'm trying to detach a cinder volume from a nova instance. Nova volume-list shows it as in-use: | 34b0ea26-f85c-4b62-8ebd-884b0e63e2d5 | in-use | filestore | 256 | None| ...
2
votes
2answers
118 views

How to know when to properly use iSCSI, NFS or SMB?

I have a File Server running Windows Server 2012 R2. It has four 6TB Western Digital RED drives. I want to host my Hyper-V Machines, WSUS (Windows Server Update Service) content and WDS/MDT deploy ISO ...
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2answers
63 views

Multiple iSCSI LUNs to one Server

I'm reasonably sure i'm ok to do this, but I would love some confirmation. Simple question, can I have two LUNs from the same SAN attached to the same server? More detail: I have a HP MSA2000 SAN, ...
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0answers
27 views

ISCSI drives suddenly lost partitions

We have a VM host, and each VM is given an ISCSI volume to boot off of. These ISCSI volumes are stored on a second server. Today, we had to reboot the VM host because ISCSI hosts kept going into ...
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2answers
121 views

Performance for ZVOLs presented over iSCSI?

I have the following setup for testing: HP Microserver N36L (Dual-core low-power Athlon64) 8GB ECC RAM 2-port Intel Gigabit NIC 4x3TB WD Green (5400 RPM?) 1 sata disk for OS image (FreeBSD 10.1) ...
0
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1answer
225 views

iSCSI enterprise target and client both on debian give invalid iniatorname error

I have two Debian Wheezy machines and am trying to set up storage for one of them on the other's disk using iSCSI (they do not have synchronized users, so NFS won't work for this application). I have ...
0
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1answer
58 views

Multipath configuration is ignoring drives after /dev/sdaa, /dev/sdab, etc

I have a bare metal server running on Softlayer. It has many Consistent Performance iSCSI storage devices attached in a multipath configuration. One of the devices, represented by /dev/sdaa1 and ...
2
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0answers
424 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 ...
0
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1answer
28 views

OCFS2 “Heartbeat generation mismatch on device” error when mounting iscsi target

As said in the title, when I want to mount a iSCSI target on one machine I get the following error: (o2hb-3F92114867,7826,3):o2hb_check_own_slot:590 ERROR: Heartbeat generation mismatch on device ...
2
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4answers
1k views

STOP 0x7b booting from iSCSI

I've a Windows 2008 SBS running. It boots of iSCSI. That setup worked for months until yesterday. I intended to reboot and gained a: STOP 0x0000007b INACCESSIBLE_BOOT_DEVICE and no idea why. My setup ...
3
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2answers
413 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
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1answer
697 views

OpenStack Cinder: iSCSI login negotiation failure after reboot

I have a Cinder storage and controller node running on the same CentOS 7 box as Nova compute. Everything worked fine, until I rebooted. Now my instances can't mount volumes and I get the errors below. ...
3
votes
1answer
131 views

What is the proper way to shutdown an iSCSI target with connected clients?

iSCSI with two DRBD primary nodes is a bad idea to use if the two paths get concurrent write requests. But I am thinking about using this idea as backend storage for an ESXi 5.5U2 host. I already did ...
2
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2answers
742 views

ESX or ESXi as FCoE or ISCSI or NFS target?

Is is possible to set up ESXi or more expensive ESX server as a storage target (FCoE, ISCSI or NFS, in that order) for other ESX servers? If so, how?
0
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1answer
53 views

VMWare 4.0 - Adding LUN from Server2012R2 iSCSI Target - Capacity 2TB, Available 102.40GB?

I have a Windows Server 2012 R2 hosting some iSCSI targets/LUNs from a local raided JBOD via Virtual Disks. I have created a thin provisioned 2TB VHDX in Windows and have added the target to VMWare. ...
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1answer
258 views

Optimal configuration with Synology as HA iSCSI backend for vSphere

I'm looking into purchasing a new storage backend for our VMware vSphere Essentials package. We have 3 ESXi hosts, currently mainly using DAS. The goal is to upgrade to Essentials Plus this year, to ...
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0answers
63 views

Windows Server Backup does not seem to be able to backup iSCSI drives

Windows Server Backup does not seem to be able to backup iSCSI connected disks! Error returned if using volume descriptor is: The path specified by ...
1
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2answers
243 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 ...
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4answers
5k views

CentOS iscsi initiator has session but there is no block device

I have installed the scsi-target-utils package on CentOS and I used it to perform a discovery. The discovery did give me an active session. I restarted the iscsi service but I do not see any new ...
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2answers
1k views

Howo to get Multipath IO with Dell MD3600i into active/active setup?

I'm desperately trying to improve performance of my SAN connection. Here's what i have: [root@xnode1 dell]# multipath -ll mpath1 (36d4ae520009bd7cc0000030e4fe8230b) dm-2 DELL,MD36xxi ...
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0answers
194 views

Best practices in connecting EMC VNX iSCSI storage [closed]

We have an EMC VNX5200 with 2 service processors, each having 4 iSCSI ports, 1 data mover (with 4 ports) and a control station, all of which is plugged into two stacked switches. What are the ...
1
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1answer
70 views

Hyper-V 2012 R2 and File shares

I currently have a 2008 R2 hyper-v cluster but I am going to be building a new 2012 R2 failover hyper-v 2012 r2 cluster in the next few weeks and wanted to get some opinions on running a large file ...
4
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5answers
24k views

Disk IO slow on ESXi, even slower on a VM (freeNAS + iSCSI)

I have a server with ESXi 5 and iSCSI attached network storage. The storage server has 4x1Tb SATA II disks in Raid-Z on freenas 8.0.4. Those two machines are connected to each other with Gigabit ...
0
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0answers
69 views

Virsh pool-info shows no space free on iSCSI pool

I have an iSCSI target configured on FreeNAS 9.3 (zvol backend). I also have a linux KVM machine where I'm trying to create a virtual machine using the iSCSI disk. On my linux KVM machine I can ...