Maxtor 52049H3 - Manual (Page 12)

PRODUCT DESCRIPTION
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Product Product Product Product Product Features Features Features Features Features
Functional / Interface Functional / Interface Functional / Interface Functional / Interface Functional / Interface
Maxtor hard drives contain all necessary mechanical and electronic parts to interpret control signals and
commands from an AT-compatible host computer. See Section 3 Product Specifications, for complete drive
specifications.
Zone Density Recording Zone Density Recording Zone Density Recording Zone Density Recording Zone Density Recording
The disk capacity is increased with bit density management – common with Zone Density Recording. Each
disk surface is divided into 16 circumferential zones. All tracks within a given zone contain a constant
number of data sectors. The number of data sectors per track varies in different zones; the outermost zone
contains the largest number of data sectors and the innermost contains the fewest.
Read / Write Multiple Mode Read / Write Multiple Mode Read / Write Multiple Mode Read / Write Multiple Mode Read / Write Multiple Mode
This mode is implemented per ANSI ATA/ATAPI-5 specification. Read/Write Multiple allows the host to
transfer a set number of sectors without an interrupt request between them, reducing transfer process
overhead and improving host performance.
UltraDMA - Mode 5 UltraDMA - Mode 5 UltraDMA - Mode 5 UltraDMA - Mode 5 UltraDMA - Mode 5
Maxtor hard drives fully comply with the new ANSI Ultra DMA protocol, which greatly improves overall
AT interface performance by significantly improving burst and sustained data throughput.
Multi-word DMA (EISA Type B) - Mode 2 Multi-word DMA (EISA Type B) - Mode 2 Multi-word DMA (EISA Type B) - Mode 2 Multi-word DMA (EISA Type B) - Mode 2 Multi-word DMA (EISA Type B) - Mode 2
Supports multi-word Direct Memory Access (DMA) EISA Type B mode transfers.
Sector Address Translation Sector Address Translation Sector Address Translation Sector Address Translation Sector Address Translation
All Maxtor hard drives feature a universal translate mode. In an AT/EISA-class system, the drive may be
configured to any specified combination of cylinders, heads and sectors (within the range of the drive's
formatted capacity). Maxtor hard drives power-up in a translate mode:
MODEL S C YL HD SP T MAX LB A C APAC IT Y
54 61 0H6 89 331 16 63 90 0 45 648 46 .1 GB
53 07 3H4 59 554 16 63 60 0 30 432 30 .7 GB
52 04 9H3 39 704 16 63 40 0 21 632 20 .4 GB
51 53 6H2 29 777 16 63 30 0 15 216 15 .3 GB
Logical Block Addressing Logical Block Addressing Logical Block Addressing Logical Block Addressing Logical Block Addressing
The Logical Block Address (LBA) mode can only be utilized in systems that support this form of translation. The
cylinder, head and sector geometry of the drive, as presented to the host, differs from the actual physical
geometry. The host AT computer may access a drive of set parameters: number of cylinders, heads and sectors
per track, plus cylinder, head and sector addresses. However, the drive can’t use these host parameters directly
because of zoned recording techniques. The drive translates the host parameters to a set of logical internal
addresses for data access.
The host drive geometry parameters are mapped into an LBA based on this formula:
LBA = (HSCA - 1) + HHDA x HSPT + HNHD x HSPT x HCYA (1)
= (HSCA - 1) + HSPT x (HHDA + HNHD x HCYA) (2)
where HSCA = Host Sector Address, HHDA = Host Head Address
HCYA = Host Cylinder Address, HNHD = Host Number of Heads
HSPT = Host Sectors per Track
The LBA is checked for violating the drive capacity. If it does not, the LBA is converted to physical drive
cylinder, head and sector values. The physical address is then used to access or store the data on the disk and
for other drive related operations.