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Oracle Linux: System Fails to Boot Due to "error: symbol `grub_calloc` not found" at Grub
in Linux
Applies To
Oracle Linux 7.0 and later
Summary
An Oracle Linux instance is unable to complete the boot process and halts with the following error message.
Booting from Hard Disk . . .
. .
error: symbolgrub_callocnot found.
Entering rescue mode ...
grub rescue >
Solution
Boot the system into Linux Rescue mode as described in KB110256.
After entering rescue mode, access the chroot environment.
sh# chroot /mnt/sysroot /bin/bash
bash#
Reinstall GRUB with the following command on the OS disk (Use whole disk, not the booting partition).
bash# grub2-install /dev/vda ←- replace vda with the proper disk name
If you encounter an error similar to the following:
0