<Confused> Names for my /dev/sd* devices keep changing automatically at reboot
I'm running RedHat 6.7 on VirtualBox. After adding an additonal hard drive via the VirtualBox Settings and rebooting my virtual server, I find that my sd* devices have been renamed.
For example, before adding the hard drive, my main filesystem is named sda1, sda2, and so on. But once I add a hard drive, my main filesystem will be named sdb1, sdb2 and the added hard drive assumes the sda name. It's very confusing to me.
I added the hard drive under "Controller: SCSI". I'm sorry - I'm a newbie to Linux so forgive me if I am not using the right terms for what I am describing. I appreciate your help.