Fujitsu D2912, Bios Manual

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Main Menu – System functions
Maximum Capacity– Hard disk capacity
Harddiskparameters Harddiskcapacity
Shows the capacity of the hard disk as an LBA value. The LBA value is the capacity calculated by the
BIOS based on the maximum possible number of sectors reported by the hard disk. IDE and BIOS
restrict the arrangement of hard disks into cylinders, heads and sectors through maximum permissible
values. The hard disk permits more cylinders but fewer heads than the BIOS. A combination of IDE
and BIOS restrictions leads to a maximum addressable storage area of 528 MByte.
Not for optical storage media.
The following table lists the maximum permissible values and the resulting
maximum usable memory capacities.
BIOS IDE Combination
BIOS/IDE
BIOS 48-bit LBA
Max. sectors per
head (at 512 Byte) 63 255 63 65535
Max. heads per
cylinder 256 16 16 65535
Max. cylinders 1024 65535 1024 65535
Capacity 8.4 GByte 137 GByte 528 MByte 144 PByte
LBA Translation converts the physical arrangement of a hard disk into cylinders, heads
and sectors so that the logical values generated lie within the above BIOS limitations. This
means that a hard disk capacity of over 528 MByte can be used. The operating system
and application programmes make use of these logical hard disk values. Hard disks of over
528 MByte are con
fi gured and operated using LBA mode. If the hard disk supports the LBA
mode, then the full memory capacity of the hard disk can be used.
The BIOS also supports 48-bit addressing for hard disks. This industry standard speci fi es hard disk
capacities up to 144 PByte (Petabyte) - approximately 120,000 times the 137 GByte limit.
Multi–sector Transfers
Shows the number of sectors per block that can be recognised automatically by the BIOS.
Disabled
2 sectors
4 sectors
8 sectors
16 sectors
14 Fujitsu Technology Solutions