Source note · Planning a Unified CM upgrade
Installing the Free Common Space COP file makes the inactive partition unusable, so you can no longer switch back to the inactive (previous) version.
Checked 2026-09-25
You will not be able to switch back to the inactive version after installing this file because the inactive partition becomes unusable.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- rollback
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Upgrade and Migration Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs - Pre-Upgrade Tasks (Manual Process) — Cisco Systems · tier 2 current vendor documentation · Pre-Upgrade Tasks > Maximize Usable Disk Space (Free Common Space COP warning)
Cite this note
APA
WarmTransfer. (2026, September 25). Planning a Unified CM upgrade: source note cucm-upgrade-planning-free-space-cop-no-switch-back. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-free-space-cop-no-switch-back
BibTeX
@misc{warmtransfer-claim-cucm-upgrade-planning-free-space-cop-no-switch-back,
title = {Planning a Unified CM upgrade: source note cucm-upgrade-planning-free-space-cop-no-switch-back},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-free-space-cop-no-switch-back},
note = {Source note cucm-upgrade-planning-free-space-cop-no-switch-back, checked 2026-09-25}
}