iSCSI with Suzanne and Shiv

Adam Bomb — Wed, 05 Mar 2008 08:01:00 GMT

I've done a couple segments on iSCSI here on Edge, but I thought we would do the technology better justice if we brought in the people that were closest to the technology to talk about it. Suzanne is a Program Manager on the iSCSI Initiator team, and Shiv is a Dev Lead. In this interview, they talk about some of the benefits of using iSCSI and how it works.

How to setup iSCSI on Windows Server 2008 [11 mins]

Neil Hutson — Wed, 30 Jan 2008 07:59:00 GMT

This is the second in a series of “How To’s” with Adam Carter. This time around, he provided a quick introduction to iSCSI, which is a technology which is part of Windows Storage Server which allows SCSI commands to be shared over the network to enable cheap and simple network storage options. In this 11min screen cast, Adam walks through iSCSI basics on the white board and then sets up an iSCSI target disk to share on one machine and then connects to this disk over the network to a second machine using the iSCSI initiator. This creates a new disk on the second server machine, which he then formats and puts into action. This is very useful for creating clustering scenarios, reduces the complexity of managing shared nothing SCSI ID’s and can be a very cost effective storage scenario. While the simple setup shown in this video works fine in a lab environment, in real life you would connect to your iSCSI disk using a dedicated high speed network cards on a private network to reduce latency. Adam provided more information on how you can get access to Windows Storage Server and 3rd party iSCSI Target providers in this recent post. Please watch this and comment.

iSCSI!

Adam Bomb — Thu, 17 Jan 2008 20:30:00 GMT

I’ve been doing Windows Clustering since back when we used to call it Wolfpack. Clustering is cool, but it can be painful to get it all up and running. Most of that pain often comes from trying to get the shared nothing storage configured properly, which in the old days meant sorting out all your SCSI ID’s for all the devices, or making sure your fiber channel optic cables were clean and connected.

Fortunately, network speeds today are such that we can ease some of that pain by moving the storage connections to Ethernet. That process is made really easy by using iSCSI protocols, which are built in to Vista and Server 2008, and have been available as downloads for XP and Server 2003.

iSCSI

What does it do? Very simply, iSCSI takes commands or requests that the OS would make to a local hard disk, and sends them over the network to a storage array or other target. Disks look like local disks on your machine – you can see them in Disk Management, format them, partition them, etc., but they physically reside as files on the network.

What are the components? There are two:

· the iSCSI Initiator is the app that you run on your client to make the initial connection to the remote disk. This is included by default in Vista and Windows Server 2008

· an iSCSI Target runs on the storage that you’re connecting to. One is typically available for SAN or NAS hardware, and we include one in Windows Storage Server SKU’s. The iSCSI Target let’s you configure what disks are available to connect to, and what machines are allowed to connect.

How do I do it? It’s actually really cool:

· Set up an iSCSI Target. You have a few options. If you have a Windows Storage Server with the Windows Unified Data Storage Server add on (WUDSS), It includes a console that lets you configure iSCSI. There are also a few 3^rd party iSCSI Target apps you can install on Windows Server.

· Configure your iSCSI Disks. On Storage Server, you create some .vhd files, specifying the size. Note that these are just virtual disks, not whole machine images.

· Configure which machines can connect to the iSCSI disks, and any security you want to put in place (you can require that the connection to the target use IPSec, for example)

· Run the iSCSI initiator from the machines you want to make the storage available on. Connect to the Target, specify which disks you want to connect to, and the disks will show up in Disk Management, where you can assign them drive letters, partition them, etc.

Why would I want to do this, again?

· It makes Failover Clustering much, much easier. You can get real failover clustering running in an afternoon on a couple of laptops, if you wanted to.

· In an Enterprise environment, you can easily leverage centralized storage without a capital investment in specialized storage equipment.

Get started

Windows Storage Server is normally available as part of an OEM storage device, but you can download an eval version if you want to take a look. Details are available on the Storage Solutions website, and you can register for eval downloads here. (make sure you select WUDSS to get access to the iSCSI Target components)

There are also a few companies that make iSCSI Targets for Windows. Nimbus, Rocket Division and String Bean are a few of them (disclaimer: I haven’t worked with any of these products and can’t speak to their performance, reliability or support).

Entries tagged with iscsi - TechNet Edge

iSCSI with Suzanne and Shiv

How to setup iSCSI on Windows Server 2008 [11 mins]

iSCSI!