H P 9 7 5 6 0 P HEWLETT PACKARD
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 1952| | |
Capacity form/unform 1355/ MB Heads 19| | |
Seek time / track 13.5/ 3.0 ms Sector/track 72| | |
Controller SCSI2 DIFFERENTIAL Precompensation
Cache/Buffer 128 KB STATIC RAM Landing Zone
Data transfer rate 2.875 MB/S int Bytes/Sector 512
10.000 MB/S ext SYNC
Recording method RLL 2/7 operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 50 | -40 65
Power: sleep W Humidity % 8 80 | 5 80
standby W Altitude km -0.061 3.048| -0.305 15.240
idle 38.0 W Shock g 6 | 30
seek 31.0 W Rotation RPM 4002
read/write W Acoustic dBA 40
spin-up W ECC Bit 144,REED SOLOMON
MTBF h 150000
Warranty Month
Lift/Lock/Park YES Certificates CSA,IEC950,TUV,UL1950,VDE
**********************************************************************
L A Y O U T
**********************************************************************
HEWLETT HP 97556/58/60 SCSI TECHNICAL REFERENCE MANUAL 5960-0115
+---------------------------------------------------------+
| 1+|XXC
| SINGLE-ENDED |||XXO
| ++|XXN
| Terminator 1+|XXN
| Packs |||XXE
| ++|XXC
| 1+|XXT
| |||XXO
| ++1XXR
| ++++++++++
| Option Pinset 9++++++++1
| +-+
| | |
| | |
| +-1
| |XX
| |XX Power
+---------------------------------------------------------+
+---------------------------------------------------------+
| |XXC
| DIFFERENTIAL |XXO
| |XXN
| |XXN
| |XXE
| |XXC
| |XXT
| |XXO
| 1XXR
| ++++++++++
| Option Pinset 9++++++++1
| +-+
| | |
| | |
| +-1
| |XX
| |XX Power
+---------------------------------------------------------+
**********************************************************************
J U M P E R S
**********************************************************************
HEWLETT HP 97556/58/60 SCSI TECHNICAL REFERENCE MANUAL 5960-0115
Jumper Setting
==============
END VIEW
--------
| Write Protect |
| Master+ | Power |
| SCSI Connector 1 Slave+| | +-------+ |
|+--XXXXXXXXXXXXXXXXXXXXXXXXXXXXX-----------++-+-421-+O O O O+-+|
|| Sync oo o ooo +4-3-2-1+ ||
|| Spindleo o ooo ||
|++ | +++ ++|
+-+ GND SCSI ID +-+
DC Power and pin connector assignments
--------------------------------------
Pin 1 +12 VDC +5%
Pin 2 +12 Volts Return
Pin 3 + 5 Volts Return
Pin 4 + 5 VDC +5%
SCSI Address Selection
----------------------
The SCSI address for the drive is determined by the states (OPEN or
CLOSED) of three pin-sets located nearest the power connector. The
drive is shipped from the factory with shorting jumpers across all
three pin-sets which sets up a SCSI Address of 7. Save any removed
jumpers for future use.
+----------+-----------------------+
| SCSI ID | Jumpers |
| | 4 | 2 | 1 |
+----------+-------+-------+-------+
| 0 | OPEN | OPEN | OPEN |
| 1 | OPEN | OPEN | CLOSED|
| 2 | OPEN | CLOSED| OPEN |
| 3 | OPEN | CLOSED| CLOSED|
| 4 | CLOSED| OPEN | OPEN |
| 5 | CLOSED| OPEN | CLOSED|
| 6 | CLOSED| CLOSED| OPEN |
| 7 | CLOSED| CLOSED| CLOSED|
+----------+-------+-------+-------+
Write Protect
-------------
The Write Protect pin-set is located between the Address pin-sets and
the Synchronized Spindle pin-sets. When CLOSED the entire drive is
forced into the Write Protect mode. When OPEN, the Write Protect
function can be controlled with the Mode Select command.
Synchronized Spindle
--------------------
There are four synchronized spindle modes: Stand Alone, Slave,
Master, and Master Control. The HP 97556/58/60 SCSI disk drives
supports all four modes.
The power-on default for all drives is the Stand Alone mode. The
Synchronized Spindle function is controlled with the RPL bits in
parameter 04 (hex), byte 17 of the Mode Select command. In addition,
byte 18 of the same Mode page provides for positional offset from the
input sync signal.
When the drive is in the Stand Alone mode:
- It does not transmit a sync signal on the master line.
- It does not receive an externally sourced slave sync input.
When the drive is set to the Slave mode:
- It does not transmit a sync signal.
- It receives an externally sourced slave sync on the slave input
line (or from the SCSI connector pin 29).
When the drive is set to the Master mode:
- It transmits a sync signal on both the master and slave lines
(or from the SCSI connector pin 29).
- It syncs internally to the same signal.
When the drive is set to the Master Control mode:
- It transmits a sync signal on the master line.
- It receives an externally sourced sync on the slave line
(or from the SCSI connector pin 29).
Option Pin-Set Selections
-------------------------
+------------------------------------------------------------------+
|Pin-Set/Status Function |
+------------------------------------------------------------------+
|Pin-Set 1: RESERVED MUST BE OPEN |
+------------------------------------------------------------------+
|Pin-Set 2: Sync Spindle Signal Routing |
| |
| 2 = CLOSED Pin 29 of SCSI connector connected to ground. |
| 3 = OPEN NOTE: when pin-set 3 is OPEN, pin-set 2 MUST be |
| CLOSED to connect pin 29 to ground |
| |
| 2 = OPEN Synchronized spindle sync signal routed to pin 29 of |
| 3 = CLOSED SCSI connector. NOTE: when pin-set 3 is CLOSED, pin- |
| set 2 MUST be OPEN. |
+------------------------------------------------------------------+
|Pin-Sets 4 and 5: +5V Source for On-Board Terminator Resistors |
| |
| 4 = OPEN All Drives: Drive +5V not connected to terminators; |
| 5 = OPEN initiator supplied +5V not connected to terminators. |
| |
| 4 = CLOSED All Drives: Drive +5V connected to on-board |
| 5 = OPEN terminators but not to SCSI connector pins. |
| |
| 4 = OPEN Single Ended Drives: Initiator supplies +5V input to |
| 5 = CLOSED SCSI connector pin 26. |
| |
| Differential Drives: Initiator supplies +5V input to |
| SCSI connector pins 25 and 26. |
| |
| 4 = CLOSED Single Ended Drives: Drive +5V connected to on-board |
| 5 = CLOSED terminators and to SCSI connector pin 26. |
| |
| Differential Drives: Drive +5V supplied to on-board |
| terminators and to SCSI connector pins 25 and 26. |
| |
| The standard Single-Ended drives are shipped with three |
| terminator resistor packs installed. The standard differential |
| drives are shipped with no terminator resistor packs installed. |
| When installing multiple drives on the SCSI channel, the packs |
| must be removed from all but the last drive in the chain. The |
| drives can be ordered from the factory with the packs removed. |
| When re-installing the packs, ensure that they are properly |
| keyed into their connectors. |
+------------------------------------------------------------------+
|Pin-Set 6: Unit Attention |
| |
| 6 = OPEN Enable Unit Attention |
| |
| 6 = CLOSED Inhibit Unit Attention |
+------------------------------------------------------------------+
|Pin-Set 7: Drive Initiation of SDTR Message |
| |
| 7 = OPEN Inhibit drive Initiation of SDTR message |
| |
| 7 = CLOSED Enable drive Initiation of SDTR message at Power-On |
| and Reset |
+------------------------------------------------------------------+
|Pin-Set 8: Parity |
| |
| 8 = OPEN Inhibit parity checking |
| |
| 8 = CLOSED Enable parity checking |
+------------------------------------------------------------------+
|Pin-Set 9: Auto Spin-Up |
| |
| 9 = OPEN Drive will not spin up until Initiator sends Start |
| Unit command |
| |
| 9 = CLOSED Drive will spin up automatically at Power-On |
+------------------------------------------------------------------+
Front Panel LED Indicator
-------------------------
The light emitting diode (LED) indicator on the front of the disk
drive is an activity light that indicates the oerational status of
the drive from power-on, through the self-test diagnostics, and into
normal operation:
1. ON When the disk drive is switched on, the LED normally stays on
during the power-on sequence. The LED stays on while the
spindle motor is being started until it is up to speed. If
the LED is does not go out, a catastrophic failure has
occured. The most probable cause is a failure of the drive
electronics/controller PCA.
2. FLASHING
A flashing LED (approximately 1 Hz) insicates that the
controller has failed all or a portion of the internal
diagnostic tests.
3. INTERMITTENT
After the power-on diagnostics have completed, the LED
functions as an activity light and will go on any time the
disk drive is executing a command, reading, or writing. If
the LED is off, the drive is idle.
**********************************************************************
I N S T A L L
**********************************************************************
HEWLETT HP 97556/58/60 SCSI TECHNICAL REFERENCE MANUAL 5960-0115
Notes on installation
=====================
Protection From Mechanical Shock
--------------------------------
The mechanism is attached to the mounting frame(s) by pliable shock
mounts that isolate it from mechanical shock when properly installed.
Before installation, the disk drive is susceptible to damage from
excessive shock and vibration during shipping and handling. Dropping
a drive almost always causes immediate damage, but setting a drive
down too hard may shorten its operational life. The damage can be
hidden, and can reduce the life of the drive, or cause unexplained
failure to occur at a later date.
Physical Mounting
-----------------
There are eight (8) threaded mounting holes (for 6/32 threads) on the
disk drive: two on each side, and four on the bottom. Typically, the
disk drive is fastened directly to a chassis with 6/32 screws. Use
the following guidelines to mount the disk drive:
- Use 6/32 screws and torque them to 10 inch-pounds.
- When mounted, the hardware must not protude more than 1 mm (0.04
inch) beyond the inside of the disk drive frame.
Airflow Requirements
--------------------
The disk drive must be installed such that the ambient air
temperature surrounding the disk drive is maintained within the
limits.
Airflow is required to maintain disk drive performance and
reliability. The disk drive can be cooled by forced air or by natural
cooling. Forced air may be necessary if the disk drive is located
within a cabinet or other enclosure. If forced air cooling is not
used, the disk drive must be located such that internal heat is
conducted away from the drive and no outside heat sources raise the
operating temperatures above the limits.
Cable Requirements
------------------
The disk drive adheres to the cabling requirements and limitations
set forth in the ANSI SCSI specifications.
- Cables with a characteristic impedance of 100 ohms 10% are
recommended for unshielded flat or twisted pair ribbon cable.
- Cables with a characteristic impedance of 90 ohms 10% are pre-
ferred for shielded cables.
- To minimize discontinuities and signal reflections, do not use
cables with different impedances on the same bus.
- A minimum cable size of 28 AWG should be used to minimize noise
effects and ensure proper distribution of terminator power.
- Cables should be properly terminated.
Recommended Mating Connectors
-----------------------------
EQUIVALENTS MAY BE USED.
SCSI Connector (single-ended and differential) 3M 3425-6600
DC Power AMP 1-480424-0
Frame Ground AMP 62187-1
Shorting jumpers for address, write protect, AMP 531220-3
and synchronized spindle pinsets (manufacturer
supplies rail of 10)
Synchronized Spindle Connector AMP Housing 4-87456-9
(*1)
Shorting jumpers for option pinsets:
2*1 shorting jumper: Dupont 86730-001
2*2 connector housing: Dupont 69307-004 (*2)
2*3 connector housing: Dupont 69307-006 (*2)
2*5 connector housing: Dupont 69307-010 (*2)
Notes:
1. Contact insert required; (For AWG 20-24 wire, use AMP 1-87309-4)
2. Contact inserts required: (For AWG 26-30, use Dupont 77138-101;
for AWG 32-36 wire, use Dupont 77139-101)
SCSI Connector
--------------
The SCSI device connector is a nonshielded 50-pin connector consist-
ing of two rows of 25 male pins with adjacent pins 2.54 mm (0.1 in.)
apart. The physical construction and pin assignments for the
connector conform to the SCSI specifications for single-ended and
differential drive configurations.
The SCSI cable connector should be a nonshielded 50-pin connector
consisting of two rows of 25 female contacts with adjacent contacts
2.54 mm (0.1 in.) apart. A shroud and header body should be used.
Single-Ended Cable
------------------
A 50-conductor flat cable or 25-signal twisted-pair cable should be
used. Cable length should be equal to or less than 6.0 meters. This
refers to internal and external cable length (except stubs).
A stub length of no more than 0.1 meter is allowed off the main line
interconnection within any connected device.
Differential Cable
------------------
A 50-conductor flat cable or 25-signal twisted-pair cable should be
used. Cable length should be equal to or less than 25 meters. This
refers to internal and external cable length (except stubs).
A stub length of no more than 0.2 meter is allowed off the main line
interconnection within any connected device.
Power Distribution
------------------
The +5 and +12 voltages provided by an external dc power supply are
distributed to the spindle motor driver, actuator driver, analog
amplifiers, and digital circuitry. A reset output alerts the other
circuits when power-on occurs and when power is lost. Each circuit
responds in a predefined manner to the reset condition.
Look Ahead Reads
----------------
The Look Ahead Read capability can improve the performance of a drive
doing sequential READs by preloading the buffer with the data most
likely to be requested with the next READ command. After a READ
command is received by the controller, the drive seeks to the proper
location and loads the requested data into the buffer. While that
data is being transferred to the host, the Look Ahead Read function
continues to read beyond track boundaries until the buffer is full.
If, in following READ requests, the host asks for subsequent blocks,
they will already be in the buffer, and the data will be returned to
the host without the delay of a media access.
If a new READ command requests data not contained in the buffer while
the drive is performing a Look Ahead Read, the process is aborted,
and the drive will immediately seek to the new location with minimal
effect on access or transfer performance. Filling the buffer with
unrequested data has a lower priority than delivering requested data.
RAM Buffer
----------
The RAM Buffer contains 128-kilobytes of static RAM. All data
transferred between the host and the disk must pass through the RAM
buffer. It is protected by an additional 2 bits of parity for each
16-bit word transferred by the DMA.
Synchronize Cache
-----------------
If a more recent logical block within the specified range exists in
cache memory than on the physical medium, the Synchronize Cache
command requests the target to write that logical block to the
medium.
**********************************************************************
F E A T U R E S
**********************************************************************
HEWLETT HP 97556/58/60 SCSI TECHNICAL REFERENCE MANUAL 5960-0115
Product Description
-------------------
The HP 97556/58/60 SCSI single-ended and differential disk drives are
reliable, low cost, high capacity, high performance, random access
mass storage devices . Each product utilizes sputtered thin-film
5.25-inch disks as storage media.
The disk drive is orderable with or without a:
- front bezel
- front panel LED indicator
- terminator resistor packs
Seek Time
---------
+-----------------------------------+--------+
|Track-to-Track msec. typ. | 3 |
+-----------------------------------+--------+
|Random Average msec. typ. | 13.5 |
+-----------------------------------+--------+
|Maximum Seek (1962 cyl) msec. typ. | 25 |
+-----------------------------------+--------+
|Incremental Head Switch msec. typ. | 0.8 |
+-----------------------------------+--------+
|Latency (Average) msec. avg. | 7.5 |
+-----------------------------------+--------+
Assembly Descriptions
---------------------
The assemblies in the disk drive include the head/disk assembly (HDA)
and the drive/electronics printed-circuit assemly (PCA). The sealed
HDA contains the mechanical and electromechanical assemblies of the
disk drive. The drive/electronics PCA provides all electronic control
over the HDA.
Head/Disk Assembly
------------------
The head/disk assembly (HDA) contains disks, heads, an actuator
assembly, head interface circuits, atmospheric controls, vibration
isolators, and a spindle assembly. An aluminium casting provides the
supporting structure for these parts. The entire assembly is sealed
and is not field repairable.
Disks
-----
The disks are 130 mm (5.1 inch) diameter aluminium substrate with a
sputtered thin-film surface. The disks are mounted on the spindle
assembly in stacks of six (97556), eight (97558), or ten (97560)
disks. Data is stored on all surfaces of all disks except for the
bottom surface of the bottom disk which is reservered for servo
information.
Heads
-----
Eleven (97556), fifteen (97558), or nineteen (97560) thin-film data
heads in the HDA write and read user data. An additional head in each
unit is used to recover the servo information from the bottom surface
of the bottom disk.
Actuator Assembly
-----------------
Mechanical positioning of the read/write heads is achieved using a
rotary actuator. Actuator current is supplied by the actuator driver,
which amplifies position information from the servo circuits. A
shipping latch captures the heads at the inside diameter of the disks
(away from user data) whenever power is removed from the disk drive.
This prevents the actuator from moving until power is applied to the
disk drive. At power-on, the servo processor releases the latch,
allowing normal movements of the heads.
Atmospheric Controls
--------------------
The atmospheric controls in the HDA consist of a breather system and
a recirculating filter. The breather system equalizes air pressure
within the HDA to ambient air pressure. A breather filter prevents
contaminants from entering the HDA. A recirculating filter maintains
a low particle count within the HDA.
Vibration Isolators
-------------------
To protect the HDA from random external vibrations, it is mounted on
vibration isolators.
Spindle Assembly
----------------
The spindle assembly provides the mechanical mounting for the disks.
The spindle rotates on a ball bearing system and is driven by an
"in-hub" brushless DC motor. The 3-phase drive current for the motor
is provided by the spindle drive circuit on the drive/electronics
PCA. Three Hall-effect sensors, mounted on the spindle assembly,
provide feedback signals to the spindle control electronics for
coarse speed and phase switching control.
Defect List
-----------
The defect list consists of a 4-byte header followed by zero or more
8-byte defect descriptors. Each descriptor consists of an 8-byte
physical address or bytes from index address. Each address is bounds-
checked by the Target. If any address is out of bounds, an ILLEGAL
REQUEST Sense Key is generated, and the format operation is
discontinued.
Error Correction Code
---------------------
The HP 97556/58/60 Series of disk drives use a Reed-Solomon error
correction code (ECC) for detection and correction of data errors.
During a write operation, the ECC function generates 18 bytes of ECC
information, and writes the information into the ECC field as the
sector is written. During a read operation, the controller generates
an 18-byte code rom the data field being read, and compares it to the
ECC field created during the write operation. If the 18-byte code
differs from the ECC field, a data error is detected and the ECC
field is used to correct the data.