Skip to content
Sep 17 / jocke

Installing Cisco Unified Communications Manager 8 on ESXi

Having problems getting CUCM 8 installed on a VM running on ESXi? So did I.

Critical Error
Validation error on HSSI mode:
VMWare Validation Failure:
Unable to validate VMWare based server disk settings.
Please check SCSI disks are at least 72GB in size and are located at 0:0 (and 0:1 in a two disk config) in machine settings.

I ran into an issue when installing CUCM 8.0.2 on a VM running on ESXi 4.1. The installer complained that it needed at least 72GB of hard-drive space. As I hadn’t read the hardware-requirements for the CUCM, I spent much of my time testing out different HDD-settings on the VM. At first I thought that it didn’t like the ESXi’s thin-provisioning, but after a while, I found out that the issue was with other settings on the VM — specifically how many CPU’s and how much RAM it needs. It’s also recommended that you choose the OS that is as close to CUCM as possible.

So, without further ado, here’s the settings you’ll need;

  • CPUs: >=2
  • Memory: >=2GB
  • Hard disk: >=73GB (you can turn on Thin-provisioning if you want)
  • Guest Operating System: Linux -> Red Hat Enterprise Linux 4 (32-bit)

Keep in mind that this is minimum, and that you can’t set them lower after the install is done, as CUCM does the same check every time it boots.

7 Comments

leave a comment
  1. havard / Oct 5 2010

    But what if you dont have ESXi installed, b´cause the CD-ROM drive is´nt supported..??

    • jocke / Oct 6 2010

      You’d have to get one that’s supported, I guess.

      </captain obvious>

      • havard / Oct 6 2010

        bla bal alb abl lab lba

  2. lima / Mar 24 2011

    It works! Thank you very much!

  3. Sorin / May 18 2011

    Thanks, it helped me installing CUC 8.0.2!

  4. Så nydelige påskeegg. Skikkelig søte og sjarmerende.Her går det i påskeegg, små kyllinger og påskepynt laget av små barnehender.Ønsker deg en ny flott uke!Tonje Merethe

  5. Rakastan miten käytät meitä tällä matkalla! Laitat meidät sinne Mirandan ja saamme tuntea kaiken. Ja minä rakastan kommentit! Se osoittaa, kuinka paljon olet meitä koukussa! Thinking of luet näitä lehtiä . . .kokous Jumala yhä uudestaan ​​joka päivä! Jumala siunatkoon sinua ja tehdä uskomattomia asioita sinussa ja sinun kauttasi! rakkautta ja halauksia!Debbie julkaisi hiljattain..

Leave a Comment