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@johnlloyd_13 did you remove the current/old FP OS?check the MD5 hash of the new OS and compare it with the download page if they're the same.ASA#sw-module module sfr uninstallsw-module module sfr uninstallUnable to uninstall Module sfr, it does not...
@Marvin Rhoads wrote:The SSD may be unhealthy.Has this appliance ever had a working Firepower service module?How can I check ssd? format it on linux pc or some tools for ssd health?Yes. it worked for two years. Is it possible to use non orig ssd?