MBR(8) OpenBSD System Manager's Manual (LANDISK) MBR(8)NAMEmbr - LANDISK-specific Master Boot Record
SYNOPSISmbrDESCRIPTION
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.
SEE ALSOboot(8), boot_landisk(8), bootxx(8), disklabel(8), fdisk(8)OpenBSD 4.9 May 31, 2007 OpenBSD 4.9