Installation guide

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Cisco ASA 5500-X Series Hardware Installation Guide
OL-32129-01
Chapter 4 Maintenance and Upgrade Procedures for the ASA 5500-X
Install and Remove a Solid State Drive for a Services Module
If you replaced the drives in the ASA 5545-X and ASA 5555-X, the ASA rebuilds the data on the SSD
because it is in RAID1 configuration.