S T 5 6 6 0 N C SEAGATE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/SUPERSLIMLINE Cylinders 3002| | |
Capacity form/unform 545/ MB Heads 4| | |
Seek time / track 13.0/ 3.5 ms Sector/track | | |
Controller SCSI2 SI/FAST/SCA Precompensation
Cache/Buffer 256 KB READ-AHEAD Landing Zone
Data transfer rate 4.000 MB/S int Bytes/Sector 512
10.000 MB/S ext SYNC
Recording method RLL 1/7 operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 5 55 | -40 70
Power: sleep W Humidity % 8 80 | 5 95
standby W Altitude km -0.305 3.048| -0.305 12.192
idle 2.5 W Shock g 10 | 75
seek 6.0 W Rotation RPM 4500
read/write 4.5 W Acoustic dBA 28
spin-up W ECC Bit
MTBF h 300000
Warranty Month 24
Lift/Lock/Park YES Certificates CSA,UL1950,UL478,VDE
**********************************************************************
L A Y O U T
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SEAGATE ST5660NC PRODUCT MANUAL 36245-004, REV. B, 9/94 DECLATHLON
+---------------------------------------------------------+
| |
| |1
| |XXI
| |XXN
| |XXT
| |XXE
| |XXR J1
| |XXF
| |XXA
| |XXC
+++ |XXE
| |J8 |XX
| | |
| | |
+++1 |
+---------------------------------------------------------+
**********************************************************************
J U M P E R S
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SEAGATE ST5660NC PRODUCT MANUAL 36245-004, REV. B, 9/94 DECATHLON
Options jumper block
---------------------
Both ST5660N and ST5660NC have the options jumper block at J8.
The options jumper block allows you to manually:
- Enable or disable active termination
- Set the SCSI ID address
- Select the terminator power source
- Enable parity
- Activate the motor start/stop option
- Attach a remote LED
These functions are represented on the options jumper block for both
drives. However, the ST5660NC allows you to control some of these
functions through the SCSI bus.
The jumper block accepts 2-mm jumpers. Spare jumpers are included
with the drive attached to the pins shown in the figure. If you need
additional jumpers, use the jumpers listed below or equivalent.
Manufacturer Partnumber
Seagate 13211-001
DuPont 89133-001
Methode 8618-202-70
J8 Options jumper block
+-----------------------------------+ +-+
|33 o o o o o o o o o o o o o o o 1 | V |
--+34 o o o o o o o o o o o o o o 2 +--- Circuit board side up
+-----------------------------------+
| o o o o | | | | | Spares |
| xxx xxx | | | | | |
+----------+---+---------+---+-----+------------------------------+
| | | |o o o| SCSI ID 0 |
| | | |o o o| |
| | | +-----+------------------------------+
| | | |X o o| SCSI ID 1 |
| | | |X o o| |
| | | +-----+------------------------------+
| | | |o X o| SCSI ID 2 |
| | | |o X o| |
| | | +-----+------------------------------+
| | | |X X o| SCSI ID 3 |
| | | |X X o| |
| | | +-----+------------------------------+
| | | |o o X| SCSI ID 4 |
| | | |o o X| |
| | | +-----+------------------------------+
| | | |X o X| SCSI ID 5 |
| | | |X o X| |
| | | +-----+------------------------------+
| | | |o X X| SCSI ID 6 |
| | | |o X X| |
| | | +-----+------------------------------+
| | | |X X X| SCSI ID 7 |
| | | |X X X| |
| | +---+-----+------------------------------+
| | |o X| Reserved Do not use |
| | |o X| |
| | +---+------------------------------------+
| | |X o| Remote LED connection |
| | |X o| |
+---+---------+---+------------------------------------+
| |o o X o o| | Remote start |
| |o o X o| | |
+---+---------+---+------------------------------------+
| |o X o o o| | Parity enable |
| |o X o o| | |
+---+---------+---+------------------------------------+
| |X o o o o| | Terminator disable |
| |X o o o| | |
+---+---------+---+------------------------------------+
|X o| | | Power from drive power |
|X o| | | connector |
+---+---------+---+------------------------------------+
|xxx| | | Power from SCSI bus |
|o o| | | |
+---+---------+---+------------------------------------+
|xxx| | | Power from drive power |
|xxx| | | connector and to SCSI bus |
+---+---------+---+------------------------------------+
|o o| | | Power to SCSI bus only |
|xxx| | | |
+---+---------+---+------------------------------------+
Active Termination
------------------
The ST5660N and ST5660NC use a jumper on the options jumper block to
enable active termination. You can order the drive with the active
termination enabled or disabled. Active termination is enabled when a
jumper is placed on pins 19 and 20 of the options jumper block.
Active termination is disabled when there is no jumper on pins 19 and
20 of the options jumper block.
SCSI address
------------
SCSI ID is set on the ST5660N and ST5660NC using pins 1 and 2, 3 and
4 and 5 and 6 on the options jumper block. The drives are shipped
with jumpers on pins 1 and 2 and pins 3 and 4 for configuring the
SCSI ID. This means the drives have a default address of SCSI ID 3.
You may need to reset the drive's address for your operation. Refer
to your host adapter reference manual for its preferred addressing
scheme.
Terminator power source selection
----------------------------------
To select the termination power source, install jumpers as follows:
- To select the drive power connector as the termination power
source for the resistor packs, install a jumper on pins 23 and 24
of the options jumper block.
- To select the SCSI connector as the termination power source for
the resistor packs, install a jumper on pins 21 and 23 of the
options jumper block.
- To provide terminator power to the SCSI connector and the drive
terminator packs, install jumpers on pins 21 and 23 and pins 22 and
24 of the options jumper block. This is the default.
- To provide terminator power to the SCSI connector from the drive
power connector only, install a jumper on pins 22 and 24 of the
options jumper block.
Parity enable option
--------------------
When a jumper is installed on pins 17 and 18 of the options jumper
block, the parity bit is used. This is the default. When a jumper is
not installed on pins 17 and 18 of the options jumper block, the
parity bit is not used.
Start/stop option
-----------------
When a jumper is installed on pins 15 and 16 of the options jumper
block, the drive waits for a Start/Stop Unit command from the host
before starting or stopping the spindle motor.
Remote LED connection
---------------------
Pins 9 and 10, located on the options jumper block, are reserved for
a remote LED. Pin 9 is ground. Use any 2-pin, 2-mm connector and, if
you are placing the drive in an array configuration, we recommend the
LiteOn (part number LTL-3231A) LED or equivalent.
Daisy chaining
--------------
The drive can be connected in a daisy chain with a maximum of eight
SCSI devices (including the host) that have single-ended drivers and
receivers. Each SCSI device must be set to a unique SCSI ID number.
SCSI ID 7 is usually used for the host adapter.
All signals are common between all SCSI devices. The SCSI devices at
both ends of the daisy chain must be terminated; the intermediate
SCSI devices should not be terminated.
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I N S T A L L
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SEAGATE ST5660N/NC PRODUCT MANUAL 36245-004, REV. B, 9/94 DECLATHLON
Notes On Installation
=====================
Mounting the drive
------------------
The ST5660N and ST5660NC are 3.5-inch form-factor drives with a
one-inch profile. You can mount them securely in the computer using
either the bottom or side mounting holes, as described below.
Position the drive so that you do not strain or crimp the cables.
Bottom mounting holes. Insert 6-32 UNC-2A mounting screws in the four
available bottom mounting holes. Do not insert the screws more than
0.20 inches (6 turns) into the drive frame.
Side mounting holes. Insert 6-32 UNC-2A mounting screws in four of
the six available side mounting holes. Use two mounting holes on each
side of the drive. Do not insert the screws more than 0.20 inches (6
turns) into the drive frame.
Caution. To avoid damaging the drive:
- Use only mounting screws of the type specified.
- Gently tighten the mounting screws_do not apply more than 6
inch-lb of torque.
Auto-park
---------
Upon power-down, the read/write heads automatically move to the
shipping zone. The heads park inside the maximum data cylinder. When
power is applied, the heads recalibrate to track 0. Caution. Do not
move the drive until the spindle motor has come to a complete stop;
otherwise, you may damage the drive.
DC power
--------
Except during the write procedure, you can apply power to the drive
or remove power from the drive, in any sequence, without losing data
or damaging the drive. If you remove power from the drive during the
write procedure, you may lose the data currently being written.
Electrical interface
--------------------
Decathlon family drives are designed to use singled-ended interface
signals. They employ singled-ended drivers and receivers and active
terminator circuitry.
- Transmitter characteristics. The drive uses an ANSI SCSI-
compatible, open-collector, single-ended driver. This driver is
capable of sinking a current of 48 mA with a low-level output
voltage of 0.4 volts.
- Receiver characteristics. The drive uses an ANSI SCSI single-ended
receiver with hysteresis gate or equivalent as a line receiver.
The loss in the cable is defined as the difference between the
voltages of the input and output signals, as shown below:
Logic level Driver output (x) Receiver input (x)
Asserted (1) 0.0V x 0.4V 0.0V x 0.8V
Negated (0) 2.5V x 5.25V 2.0V x 5.25V
Interface and connector configuration
-------------------------------------
The Seagate ST5660N and ST5660NC drives are differentiated by their
connectors. The ST5660N comes with a standard 50-pin interface
connector, a standard 4-pin power connector and an auxiliary SCSI ID
block. The ST5660NC comes with a single, 80-pin SCA interface
connector. The connectors for both drives are discussed below. To
minimize noise, use unshielded mating connectors.
ST5660N interface connector
---------------------------
The ST5660N uses a standard 50-pin, nonshielded, keyed connector. The
connector consists of two rows of 25 male contacts 0.100 inches
apart. Recommended mating connectors are listed below with their
part numbers.
Part numbers for mating 3M connectors compatible with the drive are
listed below. These connectors do not have a center key and are
available with or without a strain relief.
| No strain relief | With strain relief
| No center key | No center key
-----------------------+------------------+----------------------
Closed end | |
(for cable ends) | 3M 3425-7000 | 3M 3425-7050
Open end | |
(for daisy chain) | 3M 3425-6000 | 3M 3425-6050
Part numbers for mating Molex connectors compatible with the drive
are listed below. These connectors have a center key.
Closed end
(for cable ends) Molex 39-51-2504
Open end
(for daisy chain) Molex 39-51-2501
Below are part numbers for strain reliefs that can be used with the
Molex connectors.
Molex strain relief,
preferred version
in Europe Molex 90170-0050
Molex strain relief,
preferred version
in Japan Molex 15-25-1503
ST5660N interface connector pin assignments
-------------------------------------------
The table below shows the pin assignment for the 50-pin interface
connector. A minus sign (-) indicates an active-low signal.
Signal name Signal pin number Ground pin number
DB(0)- 2 1
DB(1)- 4 3
DB(2)- 6 5
DB(3)- 8 7
DB(4)- 10 9
DB(5)- 12 11
DB(6)- 14 13
DB(7)- 16 15
DB(P)- 18 17
Ground 19-22 _
Reserved 23-25 _
Terminator power 26 _
Reserved 27-28 _
Ground 29-30 _
ATN- 32 31
Ground 33-34 _
BSY- 36 35
ACK- 38 37
RST- 40 39
MSG- 42 41
SEL- 44 43
C/D- 46 45
REQ- 48 47
I/O- 50 49
Caution.
Do not connect pin 25 to ground. If you plug in the connector upside
down, the terminator power on pin 26 is shorted to ground. This may
damage the drive.
ST5660NC interface connector
----------------------------
The ST5660NC uses an 80-pin, male, SCA connector. It is a single
piece connector that allows power for the drive to be transmitted
through the SCSI bus. The remote LED, motor start options and
additional binary codes are also placed on the SCSI bus.
We recommend the AMP Champ 50 mating connector (part number
94-0682-10-1).
ST5660NC interface connector pin assignments
--------------------------------------------
The following table shows the pin assignments for the ST5660NC 80-pin
connector. A minus sign (-) indicates an active-low signal.
Signal Pin number Signal Pin number
+12V 1 12V GND 41
+12V 2 12V GND 42
+12V 3 12V GND 43
+12V 4 12V GND 44
NC 5 NC 45
NC 6 NC 46
NC 7 GND 47
NC 8 GND 48
NC 9 GND 49
NC 10 GND 50
IO- 11 GND 51
REQ- 12 GND 52
C/DQ- 13 GND 53
SEL- 14 GND 54
MSG- 15 GND 55
RST- 16 GND 56
ACK- 17 GND 57
BSY- 18 GND 58
ATN- 19 GND 59
DBP- 20 GND 60
DB7- 21 GND 61
DB6- 22 GND 62
DB5- 23 GND 63
DB4- 24 GND 64
DB3- 25 GND 65
DB2- 26 GND 66
DB1- 27 GND 67
DB0- 28 GND 68
NC 29 GND 69
NC 30 GND 70
NC 31 GND 71
NC 32 GND 72
NC 33 GND 73
+5V 34 5V GND 74
+5V 35 5V GND 75
+5V 36 5V GND 76
NC 37 LEDC*1 77
MTRON*2 38 DLYDST*3 78
SCSIA0*4 39 SCSIA1*4 79
SCSIA2*4 40 SCSIA3*4 80
Notes 1 to 4 indicate pins also represented on the options jumper
block.
Notes:
1. Drive activity signal; same as remote LED setting.
2. Asserted by host to enable Motor Start option (starts motor
through the SCSI bus command). Settings are mutually ex-clusive
option.
3. Asserted by host to enable the Delayed Motor Start option (motor
starts at power on or after a delay of 12 seconds times the drive
ID). This is a mutually-exclusive option.
4. Binary code on A0, A1, A2 and A3 asserted by host to set up SCSI
bus ID in drive.
Interface cable requirements
----------------------------
A characteristic impedance of 100 ohms +10% is recommended for the
unshielded flat or twisted pair interface cable. However, most
available cables have a somewhat lower characteristic impedance. To
minimize discontinuities and signal reflections, do not use cables of
different impedances in the same bus. Implementation may require
tradeoffs in wielding effectiveness, cable length, the number of
loads and the transfer rates to achieve satisfactory system
operation. If shielded and unshielded cables are mixed within the
same bus, the effect of impedance mismatch must be carefully
considered. This is especially important for maintaining adequate
margin for Fast SCSI transfer rates.
To minimize noise, use 28 AWG or larger 50-conductor flat cable or
25-conductor twisted pair ribbon cable. The following are part
numbers for nonshielded flat cables we recommend:
Part Manufacturer
Flat Cable 3M-3365-50
Twisted Pair Spectra Twist-N-Flat 455-248-50
Interface cable length for asynchronous operation
-------------------------------------------------
The SCSI interface cable must meet the following requirements for
normal operation:
- The cable cannot be longer than 6.0 meters.
- Cable stubs cannot be more than 0.1 meter long and must be
separated by at least 0.3 meter.
Interface cable for Fast SCSI operation
---------------------------------------
When using fast synchronous data transfer rates, the SCSI interface
cable must meet the following additional requirements:
- The cable cannot be longer than 3.0 meters.
- The cable should not attenuate a 5 MHz signal more than 0.095 dB
per meter.
- The DC resistance at 20*C must not exceed 0.230 ohms per meter.
- A shielded, twisted-pair cable should not have a propagation delay
delta greater than 20 nsec per meter.
Hot-plugging
------------
You can connect and disconnect the I/O and power cables for each SCSI
device in a daisy chain without powering down the system. This is
called hot-plugging. When hot-plugging, the following conditions must
be met:
- The terminators at either end of the SCSI bus are in place.
- The drive you are disconnecting or connecting is not the device
supplying terminator power or terminating resistance to the bus.
- All I/O transactions are complete before you install or remove a
drive.
To avoid damage to the disc and head, the spindle must be completely
stopped and the heads must be parked before you remove the drive from
the system. There are two ways to stop the spindle and park the
heads:
- If the drive is not configured to use the remote start/stop
feature, disconnect the DC power cable from the drive DC power
connector and wait 30 seconds.
- If the drive is configured to use the remote start/stop feature,
issue the Start/Stop Unit command and wait 30 seconds.
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F E A T U R E S
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SEAGATE ST5660N/NC PRODUCT MANUAL 36245-004 REV. B, 9/94 DECLATHLON
Formatted capacity
------------------
The capacities specified here do not include spare sectors and
cylinders. The media contains one spare sector per track and two
spare cylinders per drive.
Formatted capacity (Mbytes*) 545.29
Total sectors 1,065,036
* One Mbyte equals one million bytes.
Reliability
-----------
Read error rates are measured with automatic retries and data
correction with ECC enabled and all flaws reallocated. MTBF is
measured at nominal power at sea level and 40*C ambient temperature.
Nonrecoverable read errors 1 per 10(13) bits transferred
Seek errors 1 per 10(7) physical seeks
MTBF 300,000 power-on hours
Service life 5 years
Seek time
---------
All seek time measurements are taken under nominal conditions of
temperature and voltage with the drive mounted horizontally. In the
following table:
- Track-to-track seek time is the average of all possible
single-track seeks in both directions.
- Average/typical seek time is a true statistical random average of
at least 5,000 measurements of seeks in both directions between
random cylinders, less overhead.
- Full-stroke seek time is one-half the time needed to seek from
logical block address zero (LBA 0) to the maximum LBA and back to
LBA 0.
Read look-ahead and caching
---------------------------
The drive uses algorithms that improve seek performance by storing
data in a buffer and processing it at a more convenient time. Three
methods are used: read look-ahead, read caching and write caching.
Power management
----------------
The drive supports power-management modes that reduce its overall
power consumption. The drive automatically changes from one mode to
another in response to interface activity. You do not need to change
any parameters or send any special commands to make the drive change
modes. The power-management modes are described below.
- Spinup. Spinup is defined as the period during which the spindle is
coming up to operating speed. The power consumed in this mode is
equivalent to the average power during the first 10 seconds after
the drive begins to spin up. Refer to the startup current chart in
- Seeking. The servo electronics are active and the heads are moving
to a specific location on the disc. The read/write electronics are
powered-down. The power consumed in this mode is equivalent to the
average power measured while executing random seeks with a 2-
revolution (26.6 msec) dwell between seeks. The drive enters this
mode from the Idle mode.
- Read/Write. The drive is reading or writing. All electronics are
active and the heads are on track. The drive enters this mode from
the Idle mode.
- Idle. The spindle is spinning, the heads are parked, and the servo
and read/write electronics are powered down. The drive is ready to
accept and execute any command after the heads recalibrate. The
drive enters this mode from the Read/Write mode.
- Standby. This mode is not implemented.
Hardware and interface
----------------------
The Seagate Decathlon family drives use a SCSI-2 interface that
consists of a 9-bit bidirectional bus (8 data bits and 1 parity bit)
and 9 control signals. The interface supports multiple initiators,
disconnect and reconnect, self-configuring host software and logical
block addressing.
The interface employs a singled-ended driver/receiver configuration
that uses asynchronous or synchronous communication protocols. It
supports asynchronous transfer rates of up to 5 Mbytes per second
and synchronous transfer rates of up to 10.0 Mbytes per second. The
bus protocol supports multiple initiators, disconnect and reconnect,
additional messages and 6-byte and 10-byte command descriptor blocks.
The bus cable can be up to 6 meters long for standard mode and up to
3 meters long for Fast SCSI mode.
SCSI-2 compatibility
--------------------
The drive interface is described in the Seagate SCSI-2 Interface
Manual, publication number 77738479. The drive complies with the
mandatory subset of the ANSI SCSI-2 Interface.