2. ATA - 1
��� AT Attachment interface for Disk drives
��� 40/44 pin connectors and cabling
��� Master/slave or cable select drive configuration options
���Signal timing for basic Programmed I/O (PIO) and DMA
modes
��� Cylinder, head, sector (CHS) and Logical Block
Address (LBA) drive parameters translations supporting
drive capacities up to 220–228(267,386,880) sectors, or
136.9GB
3. ATA - 2
��� Faster PIO and DMA transfer modes
��� Support for power management
��� Support for removable devices
��� PCMCIA devices support
��� Identifydrive command that reports more
information
��� Defined standard CHS/LBA translation methods
for drives up to 8.4GB in capacity
4. ATA - 3
��� Eliminated single-word (8-bit) DMA transfer protocols
��� Added SMART (Self-Monitoring, Analysis and Reporting
Technology) support for prediction of device performance
degradation
LBA mode support was made mandatory
��� Added security mode, allowing password protection for
device access
��� Recommendations for source and receiver bus
termination to solve noise issues at higher transfer
speeds
5. ATA/ATAPI - 4
ATA Packet Interface
��� Ultra-DMAtransfer modes up to mode 2, which is
33MBps (called UDMA/33 or UDMA-ATA/33)
��� Integral ATAPI support
Defined an optional AT conductor, 40 pin cable for
improved noise resistance
��� Compact flash adapter support
��� Introducedenhanced BIOS support for drives over
9.4ZB (Zettabytesor trilliangigabytes) in size
6. ATA/ATAPI - 5
���Ultra-DMAtransfer modes up to mode 4, which is
66MBps (called UDMA/66 or UDMA-ATA/66)
��� 80-conductor cable now mandatory for UDMA/66
operation
��� Added automatic detection for 40 or 80 conductor
cables
��� UDMA modes faster than UDMA/33
��� Enabled only if an 80-conductor cable is detected
7. ATA/ATAPI - 6
��� Ultra-DMA transfer modes up to mode 5, which
is 100MBps (called UDMA/100 or UDMA-
ATA/100) transfers
��� Sector count per command increased from 8-
bits to 16-bits, allowing larger files to be
transferred more efficiently
��� LBA addressing extended from 228to 248. This
feature is often referred to as 48-bit LBA or
greater then 137GB support
��� CHS addressing made obsolete
8. ATA/ATAPI - 7
��� Addition of another transfer mode called UDMA
Mode 6
��� Allows data transfers up to 133MBps
��� Because of small performance differential
between ATA-6 and ATA-7, it is skipped over and
instead moved directly to Serial ATA
