VMWare ESX Server — Extending RAID Arrays Dell MD1000

Posted by support | ESX (VI3), Hardware, Linux, RAID, VMWare | Thursday 20 December 2007 12:53 pm

Overview Summary of Extending RAID Arrays in Dell MD1000

MD1000 Extend RAID Array

If anyone sees errors in my testing please contact me.
support@it-manage.com

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VIM 2.5 and ESX 3.5 Upgrade

Posted by support | ESX (VI3), VMWare, Virtual Center | Tuesday 18 December 2007 1:12 pm

VIM 2.0  (yes I skip the upgrade to 2.1)
Server that was running 2.0 remain at VIM 2.0.  I created another server for VIM 2.5.  Then as I upgraded ESX 3.02 to ESX 3.5 I moved them over to the VIM 2.5.  (No Real no choice, the VIM 2.0 will not allow ESX 3.5 to connect.)

My notes:

VIM 2.5 and ESX 3.5 Migrations

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RAID Write Back vs Write Through

Posted by support | Hardware, RAID | Thursday 6 December 2007 2:11 pm

To suffer or not to suffer?  That is the questions.

RAID Features
Write Through Cache

With Write Through Cache the data is written to both the cache and drive once the data is retrieved. As the data is written to both places, should the information be required it can be retrieved from the cache for faster access. The downside of this method is that the time to carry out a Write operation is greater the time to do a Write to a non cache device. The total Write time is the time to write to the cache plus the time to Write the disk.

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