Specifications

PRODUCT DESCRIPTION
2 – 11
Product Features
Functional / Interface
Maxtor DiamondMax™ 1750 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
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
This mode is implemented per ANSI ATA/ATAPI-4 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.
Multi-word DMA (EISA Type B) - Mode 2
Supports multi-word Direct Memory Access (DMA) EISA Type B mode transfers.
Sector Address Translation
All DiamondMax 1750 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).
DiamondMax 1750 drives power-up in a translate mode:
MOD EL CYL IND ERS HEADS SECTORS CAPACITY
87000A8 14,475 15 63 7,000 MB
86480A8 13,392 15 63 6,480 MB
85250A6 10,856 15 63 5,250 MB
84320A5 8,928 15 63 4,320 MB
83500A4 7,237 15 63 3,500 MB
83240A4 6,696 15 63 3,240 MB
82560A3 5,292 15 63 2,560 MB
81750A2 3,618 15 63 1,750 MB
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 the data stored on the disk and other drive related operations.