Want to know why? You can find out here:
Anthony's Blog: Using System Storage - An Aussie Storage Blog
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I think it had to happen eventually.
After much consideration I am moving to WordPress.
Want to know why? You can find out here:
I got asked this question during the week, so I thought I would share the answer with you.
The question was: Can I create a full volume copy of an XIV snapshot?
The answer of course was YES... but here is why...
An XIV has two copy concepts:
For a particular volume you can create both snapshots.... and you can also create full volume copies.
You can actually create as many of each as you wish (more than a 1000).
A snapshot is space efficient. It uses redirect-on-write and it uses space only when blocks change on the source.
A full volume copy on the other hand uses the same amount of space as the source (its like an old fashioned flashcopy).
But here is the trick, its all managed with metadata, which makes it very efficient.
In this example I have a source volume (cleverly called "Source Vol" ) that has one snapshot.
You can see there is 7 TB of actual data in that volume.
I also have a space efficient snapshot (called "snapshot_00001").
I want to 'harden up' the Snapshot and convert it to a full volume.
So I right click on the snapshot and select the "Copy this Snapshot" option.
I am asked where to copy the volume to.
I choose the volume called 'Target Vol" which is currently empty (unformatted).
The copy process occurs in the background, but the "Target Vol"
immediately looks exactly like the snapshot.
You can see this in the next screen capture where the "Target Vol"
suddenly contains 7 TB.
I have successfully converted a snapshot into a full volume.
I could then duplicate the snapshot (creating a snap of a the snap), by selecting the snapshot and choosing "Duplicate".
What I then see is a second snapshot with exactly the same creation date and time as the first one.
What this means is that "Target Vol" and "snapshot_00002" are both children of "snapshot_00001"
But now I delete snapshot_00001.
Why is this significant?
Because "Target Vol" is unaffected (regardless of how far the copy process has gotten to) and
snapshot_00002 is unaffected (even though it was a child of snapshot_00001).
What this demonstrates is the powerful way XIV has implemented meta data.
And what it means for users is maximum flexibility. Delivered by XIV.
It is that time of the year - IBM Storage announcements time.
The number and depth of announcements is a bit over whelming.... there are so many things to talk about.
The good news is that my fellow bloggers are producing mountains of great content so please check them out:
You can also check out a list of all the announcements here.
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I had some fun with my wife's computer this weekend.
She called me over because she was getting multiple messages telling her that the harddrive was failing, all being delivered by a very fancy GUI that looked like this:
I became suspicious immediately: Microsoft have never produced a GUI that looks so slick. Another big hint was that the Help & Support button tried to take me to a very strange URL. I say tried because her machine by this point was close to being a vegetable. The All Programs tab contained nothing, there were no desktop icons and the C: reported that it contained no files. We could not browse to the NET because all icons to start a browser were gone and even when I started a browser manually (from Start --> Run), the browser was set to use an unusual proxy.
Fortunately Doctor Google was very helpful and I rapidly found this URL:
This experience brought home three lessons:
All of this excitement distracted me from the main event, preparing for the May 9 announcements. You will see a log of blog posts over the next few days detailing what our developers have been up to. Prepare to hear about some very cool stuff.
In the meantime... feel free to share any other methods you have to avoid malware... and download and install MalwareBytes. It is a very nice piece of software that costs nothing to install and use.
How many chances do you get to listen to the following speakers in one place?
There are 12 customer case studies presented mainly by customers. There are over 70 sessions in eight streams, expert keynote speakers, case studies and presentations. Pulse 2011 provides the tools to help advance your infrastructure goals.
Registration is free so what excuse do you have?Registration is free so what excuse do you have? Find out more here. You can enroll here. The agenda front page is here. The detailed agenda is here.
I will presenting on day two. talking about Virtualization and Storwize V7000 so maybe I will see you there!
I got an email today from the SNIA (Storage Networking Industry Association) announcing the availability of the SNIA Emerald™ Power Efficiency Measurement Specification. I have blogged about this in the past as something the industry definately needs to do: A standardized way to compare the power consumption of different vendor products.
I have seen many clients try and do this (normally with some sort of spreadsheet) but the power numbers that vendors release are often worst case or for fully blown configurations. For instance the DS8000 power usage numbers are for a fully configured machine (where every possible slot is populated). Most clients do not buy this configuration, so the power numbers appear far higher than they actually would be for the machine they purchased.
Even worse is that power consumption needs to be matched by relative performance. How much bang are you getting per watt of power consumed?
Now only HP and IBM have so far submitted results; and only for one product each. But it is a start and it shows that vendors are willing to participate and contribute. Lets hope the results table gets more results in quick order....
Check it out here:
For completeness, here is what the SNIA shared with me (everything below is from the SNIA and is not my own work):
The Storage Networking Industry Association (SNIA) Green Storage Initiative (GSI) has announced the availability of the SNIA Emerald™ Power Efficiency Measurement Specification which was developed collaboratively among more than 25 member companies. Additionally, the GSI announced the SNIA Emerald Program. In combination, the SNIA Emerald specification provides a vendor-neutral power efficiency test measurement set of methods and the SNIA Emerald Program provides an industry-wide repository of measured test data.
"The SNIA is proud to deliver the SNIA Emerald program to a global IT industry and national bodies concerned with energy efficiency," said Leah Schoeb, chair of the SNIA Green Storage Initiative. "We are providing end-users and the industry at-large with a means to test, measure and evaluate storage systems power usage and efficiency, at a time when datacentre energy usage is projected to increase by 19% in 2012 according to Data Center Dynamics 2011 Census Report.”
The SNIA Emerald Power Efficiency Measurement Specification consists of the following elements:
Taxonomy: An industry-wide means of segmenting storage systems for products that span the range from consumer solutions to enterprise configurations which will be used to categorize the test results.
Test Methodology: A detailed and consistent means of testing various types of storage systems with load generators and power measurement instruments.
Test Metrics - Idle Measurement Test: The idle test applies to storage systems and components which are configured, powered up, connected to one or more hosts and capable of satisfying externally initiated, application-level initiated IO requests within normal response time constraints, but no such IO requests are being submitted.
Test Metrics - Active Measurement Test: Testing of storage products and components are said to be in an “active” state when they are processing externally initiated, application-level requests for data transfer between host(s) and the storage product(s).
The SNIA Emerald Program website will provide the industry with the resources needed to learn about, evaluate, test and submit storage system power usage and efficiency test results acquired by using the SNIA Emerald Power Efficiency Measurement Specification. The Program is available to the industry at large, with no requirements of membership. At time of public unveiling of the SNIA Emerald Program website, both SNIA GSI members HP and IBM have submitted test results for their respective storage systems commonly found deployed in data centers around the world. Storage system manufacturers and industry testing labs can download the SNIA Emerald Power Efficiency Measurement Specification from the SNIA Emerald website (www.sniaemerald.com). SNIA also recommends down loading SNIA Emerald User Guide that provides step-by-step guidance on how to setup a test and measurement environment for a storage system under test, and then submit measured test results to the SNIA Emerald Program. Once submitted test results are approved for public posting, manufacturers will obtain a SNIA Emerald Program logo to highlight their program participation. In turn, the industry at large can view the posted test results of various storage systems and review products that met and undergone the SNIA Emerald testing requirements. The specification and program test report do address disclosing configuration information for the system under test about energy-saving storage capacity optimizations that the system may have including features such as deduplication and thin provisioning.
Craig Scroggie, Chairman of SNIA ANZ commented “The program that SNIA has announced is the culmination of many years of collaboration between the industry manufacturers and represents a significant step forward in helping data centre managers and storage administrators get a consistent view of storage power consumption. Australia and New Zealand customers will benefit from this announcement and it is timely given the recent concerns over the impact of carbon tax legislation.”
Reference note 1: 2011 Data Center Industry Census
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In case you read my previous post and are wondering why it appears to finish early, I appear to have done some funky HTML editing and broken the post.
If you are particularly keen, check out the full (working) blog entry here:
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Just a very quick blog post to point you to another blog post that I found particularly pleasing. To be fair, the
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It seems I have some problems with inserting images into this blog.
Apologies for this, am working on discovering what I am doing wrong....
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I found a link to great video on Jason Boches Virtualization blog and I thought I would post it here as well.
What the video shows is 70 minutes worth of take-offs and landings at Logan International Airport in Boston, compressed into 150 seconds. Its an amazing piece of footage and very cleverly done. Seen anything equally as clever? Would love to hear about it. Enjoy!
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So I set myself a goal this year to better support the Developerworks System Storage forum found here:
Its a great way for me to keep my brain active and to help people achieve the most with their IBM Storage Solutions.
Its really quite surprising how many things I have learnt while helping people use IBM Storage products.
What I would love to see is more clients (and IBMers!) working in this forum, especially those with lots of practical experience.
We get many 'best practice' type questions and I think there are lots of people out there who could actively help in that area.
One thing I aim to do is to look at common type questions and create some standard responses.
So that is my homework and time will show how I do!
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If your reading my blog, your probably interested in IBM Storage hardware (since apart from Bow Ties, thats all I talk about). So I would hope your already subscribed to IBM's notification service that you will find here. Rob Jackard from the ATS Group (an IBM Business Partner based in the USA) puts together a summary of these notifications which he sends to me on a regular basis. So I am bringing them to you here. Now hopefully none of these alerts are news to you... but please, have a read and if you have not done so already.... SUBSCRIBE!
DS3000 / DS4000 / DS5000:
(2011.06.09) IBM Retain Tip# H202771 – Expanding Dynamic Capacity Expansion (DCE) large arrays may fail due to out of memory conditions.
NOTE: The 7.xx firmware for the DS Storage Controller is affected. This is a permanent restriction. Possible workarounds are available.
(2011.05.27) Documentation: Instructions for opening the IBM System Storage DS Storage Manager interface are incorrect.
(2011.05.25) DS3950 / DS4000 / DS5000 Recommended Firmware Levels.
(2011.05.18) IBM Retain Tip# H202849 – Dynamic Volume Expansion is not possible on a LUN which is in an active mirror relationship with write-mode of ‘Asynchronous not write-consistent’.
NOTE: The DS Storage Controller is affected. A workaround is available.
(2011.05.10) IBM Retain Tip# H202771- Expanding (DCE) large arrays may fail due to out of memory conditions.
DS8000 / DS6000:
(2011.06.07) DS8800 Code Bundle Information.
(2011.06.03) EXN3500 (2857-006) Storage Expansion Unit Publication Matrix.
(2011.05.19) Excessive drive spinning up (0x2 – 0x4 0x1) messages on healthy EXN3000.
(2011.05.05) NEWS: Recommended Releases for IBM System Storage N series Data ONTAP.
(2011.04.28) DataFabric Manager (DFM) 4.0.2 Publication Matrix.
(2011.05.10) Cisco MDS Field Notice: FN-63416 – DS-C9124 & DC-C9148 have incorrect MAC Programming; UMPIRE Program in Place.
(2011.05.19) Intel has reported PAGE FAULT OR CORRUPTED DATA USING 64-BIT APP IN 64-BIT NOS (Fix is Now Available).
SVC / Storwize V7000:
(2011.06.10) IBM SAN Volume Controller Code V22.214.171.124.
(2011.06.10) IBM Storwize V7000 Code V126.96.36.199.
(2011.06.10) SAN Volume Controller and Storwize V7000 Software Upgrade Test Utility V6.5.
(2011.06.10) IBM Storwize V7000 Initialization Tool.
(2011.06.10) Storwize V7000 Concurrent Compatibility and Code Cross Reference.
(2011.06.10) IBM Storwize V7000 V6.2.0 – Installable Information Center and Guides.
(2011.06.10) IBM System Storage SAN Volume Controller and Storwize V7000 V6.2 – Command-Line Interface Guide.
(2011.06.10) IBM System Storage SAN Volume Controller and Storwize V7000 V6.2 – Troubleshooting Guide.
(2011.06.10) Incorrect Usage of Drive Upgrade Command May Cause Loss Of Access to Data.
NOTE: This issue was resolved by APAR IC74636 in the V188.8.131.52 release of the Storwize V7000 software.
(2011.06.10) Storwize V7000 and SAN Volume Controller FlashCopy Replication Operations Involving Volumes Greater Than 2 TB in Size Will Result in Incorrect Data Being Written to the FlashCopy Target Volume.
NOTE: This issue is fixed by APAR IC76806 in the 184.108.40.206 and 220.127.116.11 PTF releases.
(2011.06.08) IBM SAN Volume Controller Code V18.104.22.168.
(2011.06.08) IBM Storwize V7000 Code V22.214.171.124.
(2011.05.27) IBM SAN Volume Controller Code V126.96.36.199.
(2011.05.27) IBM Storwize V7000 Code V188.8.131.52.
(2011.05.27) Storwize V7000 Systems Running V184.108.40.206-V220.127.116.11 Code May Shut Down Unexpectedly During Normal Operation, Resulting in a Loss of Host Access and Potential Loss of Fast-Write Cache Data.
NOTE: If a single node shutdown event does occur when running V18.104.22.168, this node will automatically recover and resume normal operation without requiring any manual intervention. IBM Development is continuing to work on a complete fix for this issue, to be released in a future PTF, however customers should upgrade to V22.214.171.124 to avoid an outage.
(2011.05.09) SVC V4.3.x End of Service – April 30, 2012.
SSPC / TPC / TPC-R:
(2011.06.10) Administration of the TPC Environment: A Guide for TPC Administrators.
(2011.06.08) TPC4.2.x - Supported Storage Products Matrix.
(2011.06.08) TPC 4.1.x – Supported Storage Products List.
(2011.05.23) Shutdown sequence for TPC for Replication.
(2011.05.19) Fabric probe causes instability in Brocade DCFM server.
NOTE: Brocade Defect 332161 has been identified and is resolved in DCFM version 10.4.5.
(2011.05.19) Configuring Oracle for TPC for Databases.
(2011.05.17) TPC web browser support – Firefox 4.x and Internet Explorer 9.
(2011.05.06) TPC- Resolving Issues with Cisco Switches.
(2011.05.05) How to resolve TSPC Server service start problems when TIVGUID is mistakenly uninstalled.
(2011.04.29) Tivoli Storage Productivity Center v4.1.1 Fix Pack 6 (April 2011).
(2011.04.29) TPC database size increases after upgrade to 4.2.1.
(2011.06.09) IBM XIV Host Attachment Kit for AIX v1.6.
(2011.05.24) Potential Problem on XIV Storage System ranging microcode versions 10.2.2 thru 10.2.4.a that can be caused by changing system time via Network Time Protocol (NTP) or when changing the clock via XCLI.
(2011.05.10) IBM XIV Storage System Planning Guide.
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Which tech related podcasts do you listen to?
Check out my latest blog post on Wordpress:
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If you want to read something visionary, I just finished The Medium is the Massage by Marshall McLuhan. With dramatic changes occurring in the world, often driven by social media, it is amazing to read a book that understood this so well yet was written in 1967. In fact Marshall passed away in 1980, well before most people got near a TCP/IP address and when the role of the Internet in societal change was still many many years away. A fascinating read (with some amazing art work!).
I have also been reading the excellent Steve Jobs bio by Walter Isaacson, what a fantastic book! I did not know about the friendship between Steve Jobs and Larry Ellison, nor about Al Gores role in Apple. The details of the early collaboration between Steve Jobs and Bill Gates are really interesting, as is the amazing back story of how Pixar came to be. The book is as much a history of the personal computer as it is a bio of Jobs himself. Reading the book was also quite thought-provoking, especially on themes like: motivation; ignoring the impossible; creating A-teams and the impact of office layout on creativity and teamwork.
At one point the book refers to the Macintosh software dating game, which led me to watch this video. It is also a revelation. Enjoy!