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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1answer
24 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
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1answer
13 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 ...
1
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0answers
33 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
30 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
74 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
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0answers
27 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
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0answers
51 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
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2answers
77 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
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0answers
19 views
Migrating to virtual network [closed]
Hi all I'd like to migrate my company infrastructure to a vSphere 5 infrastructure.
I'll have two Windows Server 2008 domain controllers, one file server and a SQL Server.
We have 3-4 TB of images ...
0
votes
0answers
61 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
63 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
76 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 ...
1
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3answers
108 views
Does MPIO aggregate bandwidth for a single connection?
Consider the following setup:
Windows 2008 R2, MPIO feature installed. Two iSCSI NICs (not bonded), 1Gb each.
Storage: Compellent, 2x 1Gb iSCSI ports, single controller.
In my tests I have ...
0
votes
0answers
66 views
SAN Boot CHAP'd iSCSI Target?
I have a few computers on my network that boot via iSCSI (due to dead HDDs) using chainloaded iPXE over DHCP. I wanted to enable CHAP for my iSCSI target to increase security (and learn). However, ...
1
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0answers
112 views
Dell PowerVault MD3200i dm-multipath configuration and performance snags in Debian 6.0 (squeeze)
I'll be using this iSCSI target for a couple of Debian-based KVM virtual machine hosts. Each of the target's redundant controllers has 4 ethernet ports; likewise for the initiators. I use two switches ...
4
votes
2answers
164 views
How good is failover of the iSCSI target on a two-node linux san?
I'm evaluating the possibility to use two off the shelf servers to build a cheap iSCSI redundant SAN. The idea is to run linux, pacemaker, and an iSCSI target - something like the SAN Active-Passive ...
0
votes
1answer
101 views
Is it possible to use iscsi to create a red hat cluster?
I have a netapp fast 2xxx with iscsi support, with 2 san switches. Is it possible to use one iscsi lun with cluster purposes?
The idea is to create a clustered service which needs storage, the ...
1
vote
2answers
74 views
Public/commercial iSCSI boot targets?
Is there a public or commercial offering for iSCSI boot targets?
i.e. on a blank machine with an internet connection available to it, it can be configured to look a public internet domain host and ...
1
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0answers
119 views
CentOS Client - Unable to Establish iSCSI connection with multiple interfaces on the initiator
So after upgrading to CentOS 6.2, I am seemingly no longer able to login into my iSCSI targets. I have multiple interfaces on different subnets on the system, and I first thought that it had to do ...
0
votes
2answers
55 views
Hide iSCSI targets in linux?
My SAN reports the same targets with multiple IP addresses. Is there a way to hide some of those IPs so I don't see the same targets multiple times?
2
votes
2answers
406 views
How to remove inaccessible iSCSI LUN from vSphere ESXi 4.1/5 with Storage I/O Control enabled?
I am testing out a iSCSI SAN solution in my vSphere environment and have been adding/removing LUNs on the SAN host while some were left connected on ESXi hosts. I had enabled Storage I/O Control on ...
0
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0answers
60 views
hyperv cluster iscsi and san connexion
I set up a 2 nodes hypervr2 cluster with an hp p2000g3 iscsi san.
I plan to make mpio for the iscsi network.
What are the pro/cons for making a direct connexion between the hosts and the san VS ...
5
votes
3answers
117 views
Linux NIC bonding on top of vlan interfaces?
Is it possible to set up bonding(active/backup) on top of existing vlan interfaces ?
Assume the following scenario:
Linux Server with 2 NICs connected to separate switches
iSCSI initiator + MPIO to ...
1
vote
3answers
164 views
SAN Distro with iSCSI and software RAID 5
Im looking for an OS, to install on a server, which has 4x 1Tb disks. Id like to couple those disks as an RAID-5 array, and share it over iSCSI to VMWare ESXi 5. Im not sure if this exists...
I have ...
0
votes
4answers
119 views
Dell MD3200i config query
Just a short query: I have a Dell Md3200i setup to serve LUNs to my 2 physical hosts and I'm running vSphere/ESXi v5 with a number of VM's. Is it normal behavior for ALL VM's and LUN's to run off the ...
0
votes
1answer
60 views
iSCSI drive dropping connection
I have a problem at the moment with one of our main shared folders.
The network speeds to this drive will suddenly slow right down and occasionally completely stop. The shared folder is an iSCSI ...
0
votes
1answer
139 views
How to connect SAN from CentOS through two iSCSI Targets
I had asked the similar question before. This time I want to use subnet for two iSCSI Targets, hence I start a new question.
I have an old Promise VTrak M500i SAN Server. It comes with 2 iSCSI ...
0
votes
1answer
58 views
Configure initiator on CentOS for two Targets
I have an old Promise VTrak M500i SAN Server. It comes with 2 iSCSI ports. I have given each port an IP:
port1 - 192.168.2.12
port2 - 192.168.2.13
I have two Logical Drives on this SAN and ...
0
votes
1answer
117 views
Hyper-V Server Cluster with Microsoft iSCSI Target Storage
I Have a windows 2008 R2 Ent Server. I installed a Microsoft iSCSI Target 3.3 configured and everything was fine until one reboot. The iSCSI Service will not start.
You Can reproduct the error:
1 ...
1
vote
1answer
182 views
ESXi 5.0 iSCSI Timeout increase to upgrade Equallogic Firmware
As I understand it one can upgrade the firmware on a Dell Equallogic server in about 15 seconds and it can be done whilst an ESXi host is connected and VMs are running but that the iSCSI timeout value ...
4
votes
1answer
127 views
Best NIC to use for iSCSI
I am standing up a new file server and I need to connect it to my iSCSI SAN and I am looking for a good NIC to use for dedicated iSCSI with multi-pathing. What should I be looking for in a good ...
2
votes
1answer
92 views
iSCSI volume for hyper-v
I am moving several hyper-v VMs from an under-powered host to a newer host with an iSCSI array for storage. What is the best configuration for the iSCSI volume to get the best performance for hyper-v? ...
0
votes
0answers
60 views
Shrink virtual disk on MD3000i array
Can I shrink an existing virtual disk configured in a Dell MD3000i? I have a 5.5 TB disk group which has a single virtual disk configured on it taking the entire group. I want to shrink this down to ...
2
votes
2answers
69 views
Is it possible to multipath across FC and iSCSI?
Perhaps a silly question this one, but I was wondering if it were possible to multipath a storage array across a FC connection and an iSCSI connection? Given that the main point of multipathing seems ...
0
votes
0answers
90 views
Error configuring second iSCSI port on MD3000i
Using Dell Modular Disk Storage Manager, iSCSI tab, Configure iSCSI Host Ports.
Application version: 03.35.G6.45
Storage array management version: 03.35.G6.45
Storage array name: [removed]
...
3
votes
1answer
129 views
iSCSI drive doesn't mount after reboot of windows 2008 r2
I have a server with Win2008R2 and a synology NAS. On the Nas there are 6 iSCSI partitions which are mounted on the windows server. The windows server is virtualized under Hyper-V.
After rebooting ...
0
votes
0answers
56 views
mixing single path and multipath SR's in a Xenserver pool
Has anyone attempted to run a single path iSCSI SR alongside a multipath iSCSI SR in a Xenserver 5.6 pool?
We're migrating from an old SAN to a new one and I want the new one to use multipathing.
...
1
vote
1answer
72 views
How Should I Name My iSCSI Targets?
Is there a standard or generally accepted way of naming iSCSI targets? If not a sole standard then maybe a few? Or, is it simply entirely up to the administrator to name them as they wish?
I'm quite ...
3
votes
1answer
81 views
What happens if I pull the plug of an iSCSI device?
If I pull the network connector of an iSCSI device, what happens? Will the "client" automatically connect again if I plug it in again? Is there a timeout?
(in my case I'm talking about a QNAP NAS ...
0
votes
1answer
204 views
Is Amazon EC2 ready for real-world disk-access-heavy webapp hosting with HTTPS balancer?
Load balancing with HTTPS
We have apache/java/php web application that has HTTPS sessions and we want to move to Amazon EC2 with Elastic Load balancer. But we've been reading on stackoverflow that ...
5
votes
3answers
453 views
EMC VNX iSCSI setup - unsure about SP/port assignment
We have a new VNX5300 waiting to get configured, and I need to plan out the network infrastructure before the EMC tech arrives. It has 4x1gbit iSCSI per SP (8 ports in total), and I'd like to get the ...
2
votes
1answer
39 views
Direct Storage with XenCenter
I am looking at this new Lenovo ThinkServer RD240 I got. Since we are using NAS for file storage, and most of our servers are more function/application oriented (not requiring lots of data) I am ...
1
vote
1answer
92 views
Is it possible to reduce the size of a storage pool or storage pool member in an equallogic array?
We have inherited responsibility for a Dell Equallogic PS4000 SAN that was configured with a single default pool and a single RAID 5 member that was using all 8 disks.
Having now added 8 additional ...
0
votes
0answers
112 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 ...
2
votes
1answer
173 views
iSCSI SAN - Network adapter bottleneck
My new database server (Windows Server 2008 R2) has a 4 Gbps connection to my Dell EqualLogic iSCSI SAN. I've been testing it by backing up multiple databases at the same time. There appears to be a ...
0
votes
1answer
89 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
2answers
236 views
Can ESXi (4.1) mount a VMFS datastore alongside a read-only snapshot of it?
I have a ESXi (4.1) server talking with a Windows Server 2008 R2 storage server, which presents some volumes as iSCSI targets using Microsoft's iSCSI software target; ESXi uses them as its datastores. ...
1
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0answers
86 views
iSCSI connection is gone and when reconnected drive can't be accessed anymore on Windows 2008 R2
My client has QNAP library that I've used to share 2 iSCSI connections. One to physical machine and the other to virtual machine on top of that machine. One is 4TB (connected to physical machine) and ...
1
vote
0answers
92 views
Removing an iSCSI Target - iSCSI initiator 2.0 on Windows Server 2003 R2
For the life of me I cannot figure out how to remove an iSCSI target (Dell Equallogic SAN) from a Windows Server 2003 box. The volume shows up in Windows as drive letter Y:\
Using the iSCSI ...
0
votes
0answers
47 views
Vmware ESXi 4.1u1 installer unable to find EMC LUN
We have
DELL R710 with Broadcom NetExtreme II 5709 card.
EMC Celerra NX4
Broadcom card is configured property to use specific LUN on EMC SAN (we use VLANs). We can clearly see that it finds the ...
