Source note · Unified CM backup and upgrade

Upgrading requires at least 25G of free space on the common partition.

Checked 2026-09-24

You need a minimum 25G of available common partition space

Vendor: Cisco
Product: Unified Communications Manager
Subsystem: pre-upgrade checks
Deployment: on-premises
Region: not restricted
Release range: Release 15 guide
Checked: 2026-09-24

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 chapter, check available common partition space task

Cite this note

APA

WarmTransfer. (2026, September 24). Unified CM backup and upgrade: source note cucm-backup-upgrade-common-partition-25g. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-backup-upgrade-common-partition-25g

BibTeX

@misc{warmtransfer-claim-cucm-backup-upgrade-common-partition-25g,
  title  = {Unified CM backup and upgrade: source note cucm-backup-upgrade-common-partition-25g},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/cucm-backup-upgrade-common-partition-25g},
  note   = {Source note cucm-backup-upgrade-common-partition-25g, checked 2026-09-24}
}

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