Anthony's Blog: Using System Storage - An Aussie Storage Blog
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For many years I have been working on a document that lets you translate a World Wide Port Name (WWPN) into a physical location on an IBM Storage System.
I blogged recently about how SVC and Storwize V7000 WWPNs have a slightly different layout.
The contents of that blog entry come straight from that document.
I have now pushed that document out to IBM Techdocs.
You can download it from here:
Feel free to share any feedback you have and share it with your colleagues.
For those of you who have worked with SVC, you will be aware of a quirk when determining the WWPN of an SVC fibre channel port.
The WWPN of each fibre channel port is based on: 50:05:07:68:01:Yz:zz:zz where z:zz:zz is unique for each machine and the Y value is taken from the port position (the red numbers in the boxes shown below).
Port numbers (used for servicing) are always sequentially numbered left to right (viewed from the rear of the node). So the port numbers make sense.
The Storwize V7000 consists of two node canisters . The WWNN of each node canister will be based on 50:05:07:68:02:0z:zz:zz where z:zz:zz is unique for each node canister. It is unrelated to the WWNN of the other node canister (they may be sequential numbers, they may not).
The WWPN of each Storwize V7000 fibre port is based on: 50:05:07:68:02:Yz:zz:zz where z:zz:zz is unique for each node canister and the Y value is taken from the port position. Note that the lower canister is upside down in relation to the upper canister (which you can see from the image below).
The number in each black box (which represents a fibre channel port) is the Y value. It is also the port number, This means the Y value and the port number are the same number. So for example, port 1 (the upper left hand most port), contains a 1, so a WWPN presented by this port would look like: 50:05:07:68:02:1z:zz:zz.
This makes more sense and fixes a 'feature' introduced with the 4F2 model of the SVC. Remember, that the z:zz:zz values for each node canister will be different (just like two SVC nodes had different z:zz:zz values for each node).
IBM is announcing a set of remarkable new storage products and enhancements.
· Storage Efficiency
· Ease of use
· Smart technology
The announcements show not only IBMs significant investment in storage but also IBMs tremendous depth of knowledge and experience.
You will rapidly see that the focus is on our new Midrange Storage product, the Storwize V7000. However this is only one of four major releases that you will see (plus many more other incremental releases). From a product perspective the big new announcements are:
XIV. The XIV will support the VMWare VAAI API by updating the firmware to version 10.2.4. To remind you what I am talking about, check out my earlier blog on this subject here.
Storwize V7000. This is a major new product offering in the midrange space. It takes the intelligence and history of the SVC; brings in some disk controller technology from the DS8000; adds SAS version 2 disk enclosures; provides the sub-LUN performance benefits delivered by Easy Tier; uses a simplified GUI influenced strongly by XIV and has a simplified licensing structure. This is all put into a 2U modular form factor. Because the Storwize V7000 uses the same code base as the SAN Volume Controller (SVC), it brings all the smarts of SVC including virtualized disk (using both internal SAS disks and external storage controllers), thin provisioning, transparent data migration and mirroring (including Metro and Global Mirror). Right now there is no RACE technology in the Storwize V7000 (despite IBM using the Storwize brand). But I think you can take the name as a hint of things to come.
DS8800. This is a fantastic incremental new development in the DS8000 family. It takes the long history of DS8000 development and combines it with small form factor (2.5”) SAS version 2 disks connected via 8 Gbps host adapters and 8 Gbps device adapters. The performance numbers, the environmental and floor-space requirements are all improved by a significant factor. It positions the DS8000 for many years of new functions and features.
SVC. For SVC we are releasing SVC version 6.1. This is a major software update to the SVC code. It delivers a remarkable new GUI with Easy Tier and a whole raft of functional improvements.
Other announcements will include enhancements to TPC, IBM Director, the DS3500 and Softek TDMF.
As soon as I have the announce letter URLS, I will post them. There is clearly plenty more to come.