Unable to add new LUNS on VMware 4.1 U2

Problem

This week we have upgraded our hosts to VMware ESXi 4.1.0, 582267. Our storage guy has given us 2 x 2TB LUN’s but I was unable to add them as per screen-print below. Previously he has created 2TB LUNs and these have been fine

Unable to read partition information from disk

Solution

It seems Update 2 enforces the maximum LUN size, which is 2TB minus 512 Bytes with vSphere 4.x. Depending on the storage system, 2 TB could be either 2.000 GB (marketing size) or 2.048GB (technical size). The above mentioned maximum relates to the technical size, so with the storage system you have, you may need to configure 2.047GB max.

See Also

http://virtualgeek.typepad.com/virtual_geek/2009/06/vsphere-and-2tb-luns-changes-from-vi3x.html

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.