Johan Guldmyr Articles


  • 2011-05-15
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HP's Brocade firmwares compatible with other switches?

After a question in my SAN switch firmware upgrade article I made a comparison of two downloads of 6.3.1b (one via IBM and one from HP) - the only differences were a file called ancillary and one called EULA.pdf. I used examdiff to find the differences. All the …

  • 2011-05-14
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HP Virtual Room Installation on RHEL 6 x64

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1478734 I couldn't get it to work. Eventually I installed Ubuntu 10.04 LTS in a VM in Virtualbox and in there it worked. However, resolution is only 800x600. So I found this page: http://forums.virtualbox.org/viewtopic.php …

  • 2011-05-12
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Windows 7 Blank Windows Update Screen

Ever noticed this? I googled my behind off and saw some posts about registry , re-registering, runing as administrator but any way the last one did not work. A restart do get them back. Maybe not the most awesome 'fix' but I think a restart might be good every now and …

  • 2011-05-10
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HEPIX Spring 2011 – Day 5

What day it is can be told by all the suitcases around the room. Version Control An overview of the version control used in CERN. Quite cool, they're not using Git yet but they are moving away from CVS to SVN (subversion) which is not updated anymore. Apparently hard to …

  • 2011-05-09
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HEPIX Spring 2011 - Day 4

Dinner on the 3rd night was amazing. It was at the hotel Weisse Schwan in Arheilgen outside Darmstadt and it was a nice reception hall with big round tables, waiters with lots of wine and great buffet food. A+ Cloudy day! Or - Infrastructure as a Service - IaaS A few had …

  • 2011-05-05
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HEPIX Spring 2011 – Day 3

Day 3 woop! An evaluation of gluster: uses distributed metadata, so no bottleneck that comes with a metadata server, can or will do do some replication/snapshot. Virtualization of mass storage (tapes). Using IBM's TSM (Tivoli Storage Manager) and ERMM. Where ERMM manages the libraries, so that TSM only sees …

  • 2011-05-04
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HEPIX Spring 2011 – Day 2

Guten aben! Darmstadt is a very beautiful city. It's quite old and there are lots of parks and eh, cool, houses. A person from the UK said yesterday (in the pub Ratkeller) something like this: "A particle physicist's raison d'être is to find complexities, they wouldn't turn away from one …

  • 2011-05-03
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Next Generation EVA - P6000

On theregister there was recently a post that maybe HP will announce the new EVA's in Vegas in June - the P6000. I just opened a discussion on the ITRC forum, maybe we'll see some more posts there. I myself am hoping for some thin provisioning or why not SAS backends …

  • 2011-05-02
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HEPIX Spring 2011 - Day 1

Morning. Got in last night at around 2140 local time. I should've done a little more exact research for how to find my hotel. Had to walk some 30 minutes (parts of it the wrong way) to get to it. But at least I made it to see some ice …

  • 2011-05-02
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Rename files in Linux - mv

Hey! This is an awesome little trick I just learnt about: instead of doing mv file1.txt file1.txt.old you can do this mv file1.txt{,.old} and it will automagically add a .old at the end of the filename. This is called a brace expansion: http://tldp.org …