Hard Drive: SEAGATE: ST3851A CABO 850MB 3.5"/SL ATA2 FAST
S T 3 8 5 1 A C A B O SEAGATE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/SLIMLINE Cylinders | 1651| |
Capacity form/unform 850/ MB Heads 4| 16| |
Seek time / track 14.0/ 3.0 ms Sector/track | 63| |
Controller IDE / ATA2 FAST/ENHA Precompensation
Cache/Buffer 64 KB SEGMENTABLE Landing Zone
Data transfer rate 3.000 MB/S int Bytes/Sector 512
16.600 MB/S ext DMA2
Recording method RLL 1/7 operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 5 55 | -40 60
Power: sleep 1.0 W Humidity % 8 80 | 8 80
standby 1.0 W Altitude km -0.061 3.048| -0.061 12.192
idle 3.5 W Shock g 5 | 75
seek 5.5 W Rotation RPM 3600
read/write 4.0 W Acoustic dBA 38
spin-up W ECC Bit ON THE FLY,REED SOLOMON
MTBF h 300000
Warranty Month
Lift/Lock/Park YES Certificates CSA,FCC,IEC380,IEC950,UL19...
Layout
CONNER CFS-850A QUICK REFERENCE GUIDE DEC. 94 REV. C
+---------------------------------------------------------+ | +-+ |XXJ4 | | |HDA |xx1 Power | | | |XXJ2 | | | |XX | +-+ |XXI | |XXN | |XXT | |XXE | |XXR | |XXF | |XXA |+-+C/D |XXC || |ATA/ISA |XXE || |CS | 1 || | |XXJ6 |+-+ |XX Power +---------------------------------------------------------+ 1
Jumpers
CONNER CFS-850A QUICK REFERENCE GUIDE DEC. 94, REV. C
Jumper Setting
==============
The C/D Jumper is used to determine the drive is a master (drive C)
or a slave (drive D). The drive is configured as a master, when
jumpered, and a slave when not jumpered.
C/D A/C CS o x x Cable Select o X X Master or Slave
C/D A/C CS x x o Master/Standalone X X o
C/D A/C CS o x o Slave o X o
Install
CONNER CFS-850A QUICK REFERENCE GUIDE DEC. 94, REV. C
Notes on Installation
=====================
Installation direction
----------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
| | | | | |
+---------------------+ | +-----+ +-----+ |
+-+-----------------+-+ +--+ +--+
| |
| |
+-----------------+
The drive will operate in all axis (6 directions).
J6 Standard 4-pin Power Connector --------------------------------- +----------------------- | +-----J6-----+ +---- pin 1 +12V | | 1 2 3 4 | | 1 pin 2 GND | +------------+ +-- pin 3 GND +------------------ pin 4 +5V
J4 Optional 3-pin Power Connector --------------------------------- +------------------------------ | +---J4----+ +------------- pin 1 +5 V | | 3 2 1 | | 40 pin 2 +12V | +---------+ +-------------- pin 3 GND +----------------------------------
Mounting Holes
--------------
Side: 6-32 UNC-2B .16 max. insertion
Bottom: 6-32 UNC-2B .22 max. insertion
Features
CONNER CFS-635A/850A/1275A PRODUCT MANUAL 20401006-001 REV. A 7/95
Overview of the Drives
----------------------
The Conner Filepro Series CFS635A/CFS850A and CFS1275A are enhanced
IDE, low-profile hard disk drives that are designed to operate with
an IBM PC/AT or equivalent host computer system in translate mode.
The drive provides these features:
- Can be installed in a wide range of host systems
- Task File emulation and ATA compatibility allows installation in a wide range of host systems
- High performance rotary voice coil actuator with embedded servoing eliminate the need for T-cal
- 1/7 Run length limited code
- High shock resistance
- Sealed HDA
- Automatic actuator latch against inner stop upon power-down
- Microprocessor-controlled diagnostics routines that are auto- matically executed at start-up.
- 64 segmentable cache buffer
- Read Look Ahead and selectable Write Caching
- Automatic error correction and retries, ECC on the fly
- supports ATA Standard PIO Mode 4 and DMA Mode 2
- Block size 512 bytes
- supports both CHS and LBA addressing
- Allows daisy-chaining up to two drives on the AT interface
- Auto-Translate (Universal Translate)
- 4-byte ECC diagnostic check in read/write
Firmware
--------
The drive's firmware includes a command set which the host uses to
control the drive. The command set allows the host to request the
following types of actions:
- report drive status
- seek a specific point on the disk
- read and write data
Universal Translate Mode
------------------------
Conner has established a Universal Translate Mode which enables the
user to configure the drive in an AT environment to any cylinder,
head, and sector configuration desired. The translate configuration
is limited only by the maximum capacity of the drive. Upon initial
power up to the drive it will default to a configuration shown below:
Cylinders Heads Sectors
CFS635A 1238 16 63
CFS850A 1651 16 63
CFS1275A 2477 16 63
After the drive is ready, the host system may issue INIT DRIVE PARMS
COMMAND (command code 91hex) to alter the translate configuration
(number of heads and number of sectors per track). The drive will
then:
- calculate the total number of available logical tracks based upon the entered sector and head values
- save the drive parameters in non-volatile memory for subsequent drive operations
Seek Times
----------
+----------------------------------+--------+
| track to track max. | 3 ms |
+----------------------------------+--------+
| Average msec. | 14 |
| Average msec. max. | 26 |
+----------------------------------+--------+
|Latency msec. avg. | 8.33 |
+----------------------------------+--------+
The timing is measured through the interface with the drive
operating at nominal DC input voltages. The timing also assumes
that:
- BIOS and PC system hardware dependency have been
subtracted from timing measurements.
The average seek time is determined by averaging the seek time
for a minimum of 1000 seeks of random length over the surface
of the disk.
Head Positioning Mechanism
--------------------------
The two read/write heads are supported by a mechanism coupled to a
rotary voice coil actuator.
Task File Interface Signal Connector Pin 28
-------------------------------------------
Pin 28 Cable Select (I/O)
Cable Select is functional when the C/S jumper is inserted, which
routes the C/D select to this pin. When set high, drive D: is
selelcted; when set low, drive C: is selected.
Error Correction
----------------
The drives use a Reed-Solomon code to perform error detection and
correction. For each 512-byte block, the software error correction
polynominal is capable of correcting:
- one error burst up to 22 bits
- two error burst up to 11 bits each
Single bursts of 11 bits or less are corrected on the fly (OTF) with
no performance degradation.
Execute Drive Diagnostic
------------------------
Command Number: 90 hex
Description
This command performs the internal diagnostic tests implemented by
the drive. The diagnostic tests are only executed upon receipt of
this command.
The drive sets BSY immediately upon of the command. If the drive is a
master, the drive performs the diagnostic tests and saves the
results. It then checks to see if a slave drive is present and waits
up to 5 seconds for the slave to complete its diagnostics. If the
slave successfully completes its diagostics, it asserts -HOST PDIAG.
If unsuccessful, the master drive resets BSY in the Status register
and generates an interrupt. The Error bit (ERR) is set in the Status
register and the Error register is updated.
The value in the Error register should be viewed as a unique 8-bit
code and not as the single-bit flags defined previously. The inter-
face registers are set to initial values except for the Error
register.
The table below details the codes in the Error register and a
corresponding explanation.
Error Code Description
01 hex No error detected
02 hex Format device error
03 hex Sector buffer error
8x hex Slave drive failed
Additional codes may be implemented at the manufacturer's option.
NOTE
If the slave drive fails diagnostics, the master drive shall "OR" 80
hex with its own status and load that code into the Error register.
If the slave drive passes diaagnostics or there is no slave drive
connected, the master drive shall sect bit 7 of the Error register
Task File to 0.
Reliability
-----------
MTBF 300,000 hours POH
MTTR 10 minutes typical
Preventive Maintenance None
Component Design Life 5 years
Start/Stop Cycles 40,000 minimum
Safety Standard
---------------
The drive is designed to comply with relevant product safety
standards, including:
- UL 478, 5th edition, Standard for Safety of Information Processing and Business Equipment, and UL 1950, Standard for Safety of Information Technology Equipment
- CSA 22.2#220, Information Processing and Business Equipment, CSA 22.2#950, Safety of Electrically Energized Office Machines
- IEC 380, Safety of Electrically Energized Office Machines, and IEC 950, Safety of Information Technology Equipment Including Electrical Business Equipment
- VDE 0805, VDE 0805 TIEL 100, VDE 0806
- Complies with FCC Class B, Part 15, Subpart J
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