.sgn indicates the file is digitally signed by Cisco for security and integrity verification.
Unlike standard upgrade ISOs, this "UCSInstall" version is designed to be bootable, allowing for direct installation on bare-metal servers or virtual machines (VMware) . Installation Scenarios Bootable UCSInstall UCOS UNRST 8.6.2.10000-14.sgn.161
If a server's OS partition becomes corrupted, this bootable media can be used to rebuild the node before restoring data from a backup . Bootable UCSInstall UCOS UNRST 8.6.2.10000-14.sgn.161
This specific ISO is essential for several high-level administrative tasks: Bootable UCSInstall UCOS UNRST 8.6.2.10000-14.sgn.161