iSCSI is Internet Small Computer Systems Interface, and is a standard for sending SCSI commands across the IP layer of the TCP/IP suite. Unlike ATA over Ethernet, (ATAoE) iSCSI allows you to use the same network link for mounting remote storage as well as communicating with the rest of the network. ...
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votes
1answer
27 views
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
...
3
votes
0answers
21 views
Is WinSAT reliable to test the speed of my iSCSI, Fibre SAN, under bare metal or Virtualized?
I discovered the following command in this whitepaper:
WinSat disk -read -ran -ransize 4096 -drive c
Is it reliable to use against a SAN, or iSCSI drive? I would like to compare the output of ...
5
votes
1answer
71 views
Configuring HP “Multifunction” NIC for iSCSI SAN
I am about to implement a SAN here using a HP P2000; the SAN itself is on-order (ETA a couple of weeks) so in the meantime I'm getting the rest of the equipment up and running.
The SAN has ...
24
votes
3answers
410 views
Tuning iSCSI storage
This is a Canonical Question about iSCSI we can use as a reference.
iSCSI is a protocol that puts SCSI commands as payload into TCP network packets. As such, it is subject to a different set of ...
2
votes
2answers
43 views
VMware - how best to remove an extent from an iscsi volume
In our dev/test environment, I have a vSphere 5 ESXi server running. I have one particular vm on it that went into a panic state because one of it's virtual disks was hosted on a volume that ran out ...
0
votes
1answer
53 views
Unable to initialize BlackArmor after running iSCSI Manager and Windows 7 iSCSI Initiator
I want to add a 12TB NAS to my current iSCSI, which already controls an Iomega StorCenter ix2-200 1TB NAS.
I've connected to the new NAS via Windows 7 iSCSI Initiator. When I open Disk Manager it ...
1
vote
1answer
108 views
vSphere 5/Dell MD3000i multipathing configuration clarification
Revisiting an older vSphere setup with two Dell 1950s, 4 NICs per host:
esxi1 and esxi2 for simplicity sake.
SAN is a Dell MD3000i, two controllers, two NICs per controller:
rc00 and rc01; rc10 ...
2
votes
0answers
43 views
Viewing map of iSCSI target -> LU in COMSTAR
I'm creating a number of iSCSI targets on an OpenIndiana server using COMSTAR. Basically:
zfs create -V 10g pool/comstar/vol
sbdadm create-lu /dev/zvol/rdsk/pool/comstar/vol
stmfadm add-view ...
5
votes
0answers
111 views
Which events specifically cause Windows 2008 to mark a SAN volume offline?
I am searching for specific criteria/events that will cause Windows 2008 to mark a SAN volume as offline in disk management, even though it is connected to that SAN volume via FC or iSCSI.
Microsoft ...
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votes
2answers
68 views
Feasibility of controlling two or more NAS via iSCSI
We currently run a two-year-old Iomega StorCenter ix2-200 through Windows iSCSI initiator on a Dell Optiplex 745. Meanwhile, we have two Seagate BlackArmor 440's running independently through Ethernet ...
0
votes
0answers
52 views
install network drivers on a diskless windows 2008 R2
I have a dell r715 with a Broadcom NetXtreme II 1 Gigabit Server.
I am booting my Windows Server 2008 R2 through iSCSI from a SAN.
I want to install my network drivers. When I try to install my ...
2
votes
1answer
107 views
iSCSI aggregation using one switch
Thinking of doing 2Gb aggregated iSCSI between a VM Host and a multi controller iSCSI array. Multipath with two switches is normal for this, but I only have one switch at the moment. But the switch is ...
2
votes
0answers
78 views
Volume manager of Windows Server 2008 R2 does not show all iSCSI volumes
we set up a backup server (Win2k8 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 ...
7
votes
2answers
166 views
Troubleshooting strategy for very poor iSCSI/NFS performance
We have a new Synology RS3412RPxs that offers iSCSI targets to three Windows 2008 R2 boxes and NFS to one OpenBSD 5.0 box.
Logging into the RS3412 with ssh and reading/writing both small files and ...
1
vote
0answers
168 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:
...
0
votes
0answers
33 views
Backup the iSCSI IMAGE .img in Ubuntu?
I have set up a Ubuntu server with iSCSI as a target. This server acts as a network backup for Windows SBS 2008, I use the buildt in backupprogram for Windows SBS.
This is how it looks
Win 2008 SBS ...
3
votes
2answers
92 views
RHEL iSCSI on FreeNAS
I am able to mount a iSCSI SAN drive onto multiple RHEL Servers, but when I make changes to the files on SAN, they are not evident on the other servers sharing the same drive.
Am I missing something?
...
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votes
2answers
137 views
iSCSI basic concepts
I have just detected that in one of my hosts (this is a virtual machine run by a cloud provider) there is a process eating up some bandwidth:
NetHogs version 0.6.0
PID USER PROGRAM ...
0
votes
0answers
44 views
Has anyone used products by StorSimple? [closed]
Their products are storage systems similar to NetApp, but their "hook" is they provide automated tiered storage with the third tier being Cloud providers like Amazon and Azure.
They have an ...
2
votes
1answer
86 views
Windows 7 routing traffic through the gateway for local addresses
Windows is adding a route for a local address (10.0.0.90 - my fileserver) with a gateway of (10.0.0.138 - this is my gateway), the gateway only has a 100Mbs link so all of my fileserver bound traffic ...
1
vote
1answer
183 views
ESXi 5 - Custom build iscsi or openfiler?
This is for a development environment, NOT a production environment. We have 2 ESXi 5 hosts that is currently using their own local disks for storage. We have a very large Supermicro server that has ...
3
votes
1answer
194 views
Esxi iSCSI slow
I have a server with ESXi 5 and iSCSI attached network storage(4x1Tb Raid-Z on freenas). Those two machines are connected to each other with Gigabit ethernet, and a procurve switch in between.
After ...
4
votes
1answer
84 views
Dedicated NIC or dedicated port for iSCSI?
When spec'ing and configuring a machine that will utilise shared iSCSI storage, I've read a lot of documentation which suggests a dedicated network adapter should be used for iSCSI communication. That ...
0
votes
1answer
129 views
iSCSI storage, partitioning and LVM
We are in the process of moving our (direct attached) storage systems to an iSCSI based consolidate storage and we have come up with this interesting question: where should we place LVM processing? ...
3
votes
2answers
86 views
DPM 2010 iSCSI Mirror
We're using DPM 2010 for exchange backups,
The backup Disk(s) are iSCSI attached drives from multiple NAS boxes.
We'd like to mirror iqn.2009-07.com.example.example:RAID.iscsi4.vg0.iscsi05 onto ...
8
votes
2answers
121 views
Can i pause VM's while power-cycling iscsi storage array
Unfortunately I may have to power-cycle my storage array.
In the context of using KVM with libvirt managing the Virtual Machines where i need to power-cycle the storage array, is it possible or even ...
1
vote
1answer
193 views
Win2K8 Server MPIO iSCSI failover not working
I have a desire to pass iSCSI traffic between my Windows 2K8 Server lab system and my NetApp filer across two separate network stacks*.
My configuration is as follows:
one Win2K8 server with the ...
0
votes
1answer
122 views
Linux Multipath - Can a Host connect to two different SANs?
I may need to power-cycle a SAN and i'm looking to avoid downtime. I have some options to essentially copy live LUNs from one SAN to another. Currently i have a single iSCSI SAN and i connect to it ...
0
votes
1answer
483 views
Cannot enable iSCSI port binding without adding a physical NIC to the vSwitch
Why can I not have a purely virtualized SAN in vSphere 5? I cannot enable the iSCSI port binding option (it is greyed out and unchecked) or add the VMkernel to the iSCSI software host bus adapter ...
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votes
2answers
192 views
Is vSphere 5 compatible with an OpenIndiana/Napp-it iSCSI datastore?
My hostd.log file on vSphere 5 says that partedUtil is timing out while trying to write the partition table on an iSCSI target being served from OpenIndiana/napp-it.
I read that sized over 2TB give ...
1
vote
2answers
144 views
NTFS on iSCSI - Mounting two Server 2008 servers to same LUN
I'm aware that you can't mount a single LUN to two read/write NTFS iscsi volumes without massive issues unless you are using clustered servers. However, I'm curious about mounting 1 iscsi lun ...
1
vote
1answer
61 views
How to set client-based ACL on iscsi target?
Say I have the following set up.
<target iqn.2012-02.local.mydomain.server1.target1>
backing-store /dev/virtstore/virtimage1
</target>
<target ...
0
votes
0answers
270 views
Which NAS to get for VMWARE/ESXi 5 / ISCSI (LUN) - 2012 [closed]
We now have a few servers, DL380's and a few others, all with ESXi 5. We are going to have a few services that we are going to run from these servers.
The goal with this is to bring all the storage ...
5
votes
1answer
111 views
Completely disjoint iSCSI networks vs dedicated switches and VLANs
I'm looking for best practice or pros/cons for deploying an iSCSI storage network.
The two options are:
A completely disjoint iSCSI storage network
Dedicated switches with a separate VLAN for ...
0
votes
1answer
85 views
Microsoft iSCSI Initiator: How to pass a CHAP user name?
I need to connect a Win2008 R2 server to a iSCSI target and I'm supposed to use a CHAP user name that is different from the initiator name.
Technet says:
By default, the Microsoft iSCSI Initiator ...
2
votes
2answers
123 views
iSCSI initiator cannot remove session on boot drive
I'm very new to iSCSI so forgive me if I use the wrong terminology.
I have two nics on my host with IP addresses that can see my iSCSI device (DELL MD3200 if it matters).
We are booting the system ...
4
votes
2answers
176 views
Recover NTFS data from a ZFS pool that was exposed as an iSCSI target
This was me being stupid and the data is by no means critical and is now a learning experience first, time saver second.
I set up a 100GB iSCSI target via the bare bone instructions in napp-it. It's ...
1
vote
1answer
83 views
Mounting an additional iSCSI volume in Centos without restarting the iscsi initiator
I don't know if I'm missing something but when I'm mounting additional iSCSI volumes to a said server to add additional storage to a server I'm not seeing a way to mount the volume after running a ...
-1
votes
1answer
116 views
What San - Dell or QSAN? [closed]
Looking for advice on using a Dell MD3620i for a small business San for Vmware. PLan to have usual suspects, AD, File server, Exchange2010, Sharepoint, Terminal Services etc. Good idea or what? - also ...
1
vote
1answer
172 views
MD3200i Slow Performance and Queue Depth
Read performance on our SAN is slow under certain workloads. When we compare this to some local storage, we find the local storage performing 2x as fast. The SAN performs well with a high Queue ...
0
votes
1answer
39 views
What could be causing this bottleneck on Nextenta
I have a Nextenta box connected to another Windows 7 machine via iSCSI. It is getting horribly slow average write speeds, but a large active time in the Windows Resource Monitor.
The machines are ...
2
votes
2answers
192 views
hosting iscsi on smartos
I am trying to get back into the unix game for some storage projects we have got going. We would love to use joyents smartos (based on illumos) for that.
Working with it is a real joy (setting up vms ...
1
vote
1answer
107 views
Solaris: Clone/Recreate iSCSI target not backed by a ZFS Volume
Is it possible to re-create or clone an existing iSCSI target not backed by a ZFS volume? I ask because upon rebooting a X4500 Thumper, I was affected by this bug: ...
5
votes
3answers
104 views
What are some shared-disk filesystems people have successfully used with iSCSI?
The setup looks something like this.
The goal is to have multiple computers mount a single LUN from the iSCSI target. Ideally mounting read/write and with ACL support.
The servers are running ...
0
votes
1answer
57 views
How to track physical drives to server LUNs & mount points
I need to document which physical drives each server depends on ( SAN, on an external array, iSCSI etc). Since this potentially a many-many relationship, with dependencies, finding a usable solution ...
0
votes
0answers
111 views
iSCSI-SCST CHAP Implementation
I was wondering if anyone know how to implement CHAP authentication on openfiler for iSCSI-SCST? I know how to configured with iSCSI-IETD but not with iSCSI-SCST.
Thanks in advance.
1
vote
2answers
278 views
Isolate iSCSI traffic on a separate VLAN
My question relates to iSCSI connections and VLANing.
My configuration is 2 Hyper-V hosts connected through a pair of stacked layer3 Dell 6224 24 port switches to an Equallogic PS4000 Storage ...
0
votes
0answers
133 views
Microsoft Cluster - add node fails validation with “List iSCSI HBA”
I'm trying to add a node to a 1-node Windows 2008 R2 cluster that is already running MSSQL 2008 R2 and MSDTC. Shared storage is provided over iSCSI and the initiators are just the MS software iSCSI ...
1
vote
1answer
220 views
iscsitarget and vlans (Debian Squeeze)
We are currently running iscsi in an open network and would like to migrate our iscsi to a separate vlan. Reading through the documentation this doesn't seem to be possible.
Instead iet/iscsitarget ...
-1
votes
1answer
242 views
Free SAN Storage Software for Linux [closed]
I'm looking for a free solution to build virtual disk targets accessible over SAN (iSCSI). Primary requirement for me is data deduplication support. After much search on the internet i came across ...
