Unable to add new LUNS on VMware 4.1 U2

April 25, 2012 Storage, VMware No comments

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.

Tags:
LUN
storage
VMware

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