5.8: fdisk(8) repaired to work on 4K sector disks again.

[Martillo]

5.8: fdisk(8) repaired to work on 4K sector disks again.

What does this mean for those who installed 5.7?

[jggimi]

Since you asked, I got to exercise my research muscles again.

A scan through the most recent Changelog showed lots of -current changes to fdisk for EFI booting, but going back one Changelog I found this log entry for revision 1.73 of /usr/src/sbin/fdisk/fdisk.c:

CVSROOT:    /cvs
Module name:    src
Changes by:    krw@cvs.openbsd.org    2015/07/08 17:44:56

Modified files:
    sbin/fdisk     : fdisk.c 

Log message:
Do not attempt to read a disk sector worth of data from the file
containing the MBR template. Most especially don't get upset when
the 512-byte file does not contain a full 4096 byte disk sector.

Allows 4096-byte disks to be fdisk'ed once more.

Problem reported and fix tested by Gerald Hanuer via bugs@.

ok deraadt@

Here's a link to the brief conversation on bugs@:

http://marc.info/?t=143627676600001&r=1&w=2

[Martillo]

Thanks jggimi!