Source note · Planning a Unified CM upgrade
A direct upgrade to Release 15 fails on any single-80GB-vDisk deployment, even if the disk was manually resized to 110 GB.
Checked 2026-09-25
Direct upgrade to Unified Communications Manager and IM and Presence Service Release 15 will fail for all single 80GB vDisk deployments, even if you manually resized the HDD size to 110 GB.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- virtual machine requirements
- Deployment
- on-premises
- Region
- not restricted
- Release range
- destination Release 15
- Checked
- 2026-09-25
Sources
- Upgrade and Migration Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs - Planning the Upgrade — Cisco Systems · tier 2 current vendor documentation · Planning the Upgrade > Requirements and Limitations > Virtual Machine Configuration
Cite this note
APA
WarmTransfer. (2026, September 25). Planning a Unified CM upgrade: source note cucm-upgrade-planning-80gb-vdisk-fails. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-80gb-vdisk-fails
BibTeX
@misc{warmtransfer-claim-cucm-upgrade-planning-80gb-vdisk-fails,
title = {Planning a Unified CM upgrade: source note cucm-upgrade-planning-80gb-vdisk-fails},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-80gb-vdisk-fails},
note = {Source note cucm-upgrade-planning-80gb-vdisk-fails, checked 2026-09-25}
}