1. In EXSi, make sure cdrom drive is connected
2. Find out the blockid of cdrom device:
blkid /dev/cdrom
/dev/cdrom: BLOCK_SIZE="2048" UUID="2021-05-03-15-21-56-00" LABEL="RHEL-8-4-0-BaseOS-x86_64" TYPE="iso9660" PTUUID="426eea3b" PTTYPE="dos"
3. Add entry in /etc/fstab
UUID=2021-05-03-15-21-56-00 /cdrom iso9660 ro,user,auto 0 0
Done (can run "mount /cdrom")
df -k
Filesystem 1K-blocks Used Available Use% Mounted on
devtmpfs 8075472 0 8075472 0% /dev
tmpfs 8105800 0 8105800 0% /dev/shm
tmpfs 8105800 9492 8096308 1% /run
tmpfs 8105800 0 8105800 0% /sys/fs/cgroup
/dev/mapper/rhel_database--rhel84-root 31441920 4695768 26746152 15% /
/dev/mapper/rhel_database--rhel84-data 104806400 763756 104042644 1% /data
/dev/sda2 1038336 242324 796012 24% /boot
/dev/sr0 9892300 9892300 0 100% /cdrom
/dev/mapper/rhel_database--rhel84-home 11020288 123784 10896504 2% /home
/dev/sda1 613184 5892 607292 1% /boot/efi
tmpfs 1621160 1180 1619980 1% /run/user/42
tmpfs 1621160 0 1621160 0% /run/user/0
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