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Hard Drive: QUANTUM: DAYTONA 256 S 256MB 2.5"/SSL SCSI2 SE




D A Y T O N A   2 5 6   S    QUANTUM
                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 2.5"/SUPERSLIMLINE    Cylinders    1704|     |     |
Capacity form/unform   256/      MB        Heads           4|     |     |
Seek time   / track  17.0/ 5.0 ms          Sector/track     |     |     |
Controller           SCSI2 SINGLE-ENDED    Precompensation
Cache/Buffer           128 KB SEGMENTED    Landing Zone
Data transfer rate    3.000 MB/S int       Bytes/Sector      512
                     10.000 MB/S ext SYNC
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -40 65
Power: sleep              W     Humidity     %        10 90    |     10 90
       standby        0.2 W     Altitude    km            3.048|        12.192
       idle           1.1 W     Shock        g        10       |    300
       seek           2.2 W     Rotation   RPM      4500
       read/write     2.2 W     Acoustic   dBA        33
       spin-up            W     ECC        Bit   112,REED SOLOMON
                                MTBF         h     350000
                                Warranty Month        12
Lift/Lock/Park     YES          Certificates

Features

QUANTUM DAYTONA DRIVES

Overview
--------
The Quantum Daytona products are high-capacity 2.5-inch hard disk
drives that provide unmatched mass storage solutions for slim sub-
notebook and full-featured notebook computers.

The Daytona 256 is the first device to offer subnotebook users 256 MB
of formatted storage capacity in a 12.5-mm-high drive for subnote-
books and a 341 MB, 19-mm-high drive for notebooks.

All four Daytona drives bring desktop PC performance to notebook
computing with a fast internal data transfer rate of 36 Mbits/second.
Daytona performance benefits from a common architecture shared with
two Quantum families of high-performance 3.5-inch drives. Matching
features include a multi-segmented adaptive cache, local bus support
with fast multiword DMA and AutoRead and AutoWrite technology.

The Daytona drives leverage most strongly off the design of Quantum's
earlier GoDrive GLS line of 2.5-inch devices. They share GLS' highly
integrated electronics, which consists of only five chips, as well as
its firmware base. This leveraged approach to design eases
qualifications and improves product availability.

The Daytona drives feature exceptional ruggendness with a very high
level of protection against non-operating shock. For energy
efficiency, the drives comply with industry standards on power
consimption, drawing only 0.2 watts of power in standby mode.

Reliability Features
====================

ShockLock Pivoting Magnetic Latch
---------------------------------
An innovative pivoting magnetic latch protects the drives from short-
duration, non-operating shocks as high as 300 Gs, which is the high-
est level of protection offered by 2.5-inch disk drives. The magnetic
latch swings away from the drive's actuator to eliminate disturbances
when inner tracks are read.

Error Correction Code (ECC) On-the-Fly
--------------------------------------
The Daytona product use a custom ASIC to implement a state-of-the-art
error correction code that maintains data integrity at high through-
put rates.

Performance Features
====================

Adaptive Segmentation
---------------------
The Daytona products feature Adaptive segmentation for more efficient
cache use. With this feature, the buffer space needed for read and
write operations is dynamically allocated, which yields higher
throughput from a given buffer side.

DisCache and WriteCache Firmware
--------------------------------
DisCache firmware optimizes disk drive performance by speeding data
access times and data retrieval, and increasing throughput. Quantum's
proprietary WriteCache firmware allows the host-to-buffer transfer of
data to occur while the buffer-to-disk transfer of a prior command is
still executing.

Upper 32 KB Buffer used for firmware.

Power Conservation Features
===========================

StackWrite Firmware
-------------------
StackWrite firmware can save up to 13 percent of battery power while
providing faster system response. The unique firmware accumulates
write requests in buffer memory instead of directly onto the disk
when the Daytona drives are in standby mode under battery power.

AutoIdle and AutoPark
---------------------
To conserve battery power, the actuator motor on the Daytona products
can be shut down after five seconds of inactivity - without host
intervention. With the new AutoPark mode, Daytona's heads are auto-
matically parked over the dedicated landing zone when AutoIdle is
initiated.

ATA Compliance
--------------
Daytona drives with an AT interface incorporate all the energy-
efficient modes defined by ATA/CAM (AT Attachment/Common Access
Method).

Versatility Features
====================

MCC Compatibility
-----------------
The Daytona disk drives conform to the latest standards of the
Manufactures Compatibility Committee (MCC). As a result, the drives
can easily slide into position and connect directly to a hard-mounted
connector on a notebook's motherboard.

AT Bus Cable Select Hardware
----------------------------
Automatic cable-select hardware simplifies disk drive installation by
eliminating the need for a physical master/slave jumper. This is
ideal for removable drive applications, when the same Daytona drive
is a master in a notebook computer and a slave when used with a
desktop computer.













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