This is a note about how to mount the 2nd hard disk when Ubuntu starting up. From here.

First run the following command to get the UUID of the target disk:

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sudo blkid
/dev/sdb: UUID="9ab9b3dd-5cad-4fe3-a4d0-b44d89493c11" TYPE="ext4"

Then update the “/etc/fatab” file by adding the following line which is used to mount the target disk when the OS is starting up:

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UUID=9ab9b3dd-5cad-4fe3-a4d0-b44d89493c11    /home/user/storage    ext4    rw,user,auto    0    0

Restart OS. The disk is mounted to the “/home/user/storage” directory.