Cisco notes that RAID controller background operations (Consistency Check, Background Initialization, Rebuild, Patrol Read) can significantly affect I/O performance and recommends scheduling Consistency Check and Patrol Read at low load.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- platform I/O
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 12.5(1); hardware with Cisco RAID controllers
- Checked
- 2026-10-02
Sources
- Troubleshooting Guide for Cisco Unified Communications Manager, Release 12.5(1) - Cisco Unified Communications Manager System Issues — Cisco Systems · tier 2 current vendor documentation · System issues chapter > RAID controller background operations
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting high CPU and service crashes in Unified CM: source note cucm-high-cpu-troubleshooting-raid-background-io-impact. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-high-cpu-troubleshooting-raid-background-io-impact
BibTeX
@misc{warmtransfer-claim-cucm-high-cpu-troubleshooting-raid-background-io-impact,
title = {Troubleshooting high CPU and service crashes in Unified CM: source note cucm-high-cpu-troubleshooting-raid-background-io-impact},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-high-cpu-troubleshooting-raid-background-io-impact},
note = {Source note cucm-high-cpu-troubleshooting-raid-background-io-impact, checked 2026-10-02}
}