NAME
mbr —
LANDISK-specific Master Boot
Record
SYNOPSIS
mbr |
DESCRIPTION
The MBR program comprises only one sector
(512 bytes) and includes a partition table, since the disk is located in the
0th sector of the disk. Upon receiving control from the system firmware
mbr will scan the partition table for an active
partition and continue loading the Primary Boot Record (PBR) from the
beginning of the partition, if found.
mbr is installed on the disk by
fdisk(8),
which is also used to operate the partition table.
The partition table consists of four entries, only one of which may be marked as “active”. The PBR is loaded from there.
DIAGNOSTICS
A few messages are printed in case of errors:
- No active partition
- Indicates that none of the partitions are marked “active”.
- Read error
- An error occurred while fetching the primary boot loader.
- No O/S
- The partition table is empty.