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Re: BIOS Can Not Find Disk




Le 01/12/2017 à 19:57, Greg Wooledge a écrit :
On Fri, Dec 01, 2017 at 01:50:12PM -0500, Dan Norton wrote:
Disklabel type: gpt

Apparently, BIOS does not see a bootable device. In the dim past, fdisk
could set a partition as "active", which was its euphemism for "bootable".
However now:

GPT disk labels don't have active/bootable partitions.

Yes they do. They even have two kinds of them.

- Partition attribute bit 2 = legacy BIOS bootable.
It is supposed to be equivalent to the boot/active flag in partition entries of the MBR. I just wonder how a BIOS would use that, though.

- The good old boot/active flag of the GPT protective partition entry in the MBR. Some BIOSes require it to boot a drive regardless of the presence of a GPT disk label. It can be set with parted which considers it as a disk flag (disk_set pmbr_boot on), or by fdisk by forcing it to use the protective DOS/MBR disk label (-t dos).