How to set disk1's MBR to boot from disk3 instead?

Question

A few colleagues and I need to work out one setup CD for the product, and it has the requirement to install to the smallest disk whenever possible.

We get into a wired case that if there are 3 hard drives: 70GB, 70GB and 50GB for example, and /boot and /home and other partitions are setup properly on the 50GB drive, and when it boots up, I can F12 and choose to boot from disk3 and it goes well.

If I leave it untouched and it reboots to a blank screen with a blinking cursor --- apparently the MBR of disk1 does not direct the BIOS to boot from disk3. How can I fix this? Great thanks as have been searching the web for a whole day with little clue on this.

Here is what "fdisk -l" says about the disks, in VirtualBox as a test run. fdisk -l

Install with UEFI and you'll no longer have this problem. – Michael Hampton Aug 14 '20 at 01:44 — Michael Hampton, Aug 14 '20 at 01:44

score 0 · Answer 1 · answered Aug 14 '20 at 01:23

0

There is a free (for personal use only) tool, called EasyBCD that will allow you to move the boot sector to a new disk, as well as edit.

answered Aug 14 '20 at 01:23

Christopher H

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Thank you :-) --- can I do it from the command line? – ted6914 Aug 14 '20 at 05:20

How to set disk1's MBR to boot from disk3 instead?

1 Answers1