The amount of disk space required for each virtual machine is dependent on a variety of factors, including space for snapshots, installation images, and VMware itself. Use this information to determine the minimum required disk space for the physical server hosting each virtual machine.
This information here is in addition to the general hard disk requirements described in Physical server requirements for hosting a virtual machine
and Other requirements for hosting a virtual machine
The virtualized IBM
® Unified Telephony requires that the virtual machine present a single SCSI disk on target (0:0). The virtual machine disk size should be 140 GB; however, VMware itself requires an additional 40 GB – so the host server disk drive should be at least 180 GB for a single Sametime
Unified Telephony virtual machine on a dedicated physical server (140 GB + 40 GB).
If you configure a co-located virtual machine on a single physical server, another 140 GB of disk space is required for the additional virtual machine, for a total of 320 GB (140 GB + 140 GB + 40 GB).
Calculations for the physical HD sizing including allowances for VMware and ISO images are based on the following:
- New Image + Old Image during upgrade: 10GB
- Restore CD: 100 MB
- Allowed for VMware machine overhead: 3 GB (140 GB VM disk size)
- Allowed for VMware system disk overhead: 17 GB
The calculations for the physical hard disk sizing does not include space that would be needed for snapshots, or for swap space for needed by other virtual machines that do not reserve their memory.
The virtual SCSI controller must be type LSI Logic parallel. The physical disks can be on-board the host or connected by SAN. Any level of RAID can be used. Disk reservation parameters should be left at their default settings.
Parent topic: Requirements for the virtualized Telephony Control Server