Hard Drive: QUANTUM: QM 30270 MVS MAVERIC 270MB 3.5"/SL SCSI2 FAST
Q M 3 0 2 7 0 M V S M A V E R I C QUANTUM
Native| Translation
------+-----+-----+-----
Form 3.5"/SLIMLINE Cylinders 2856| | |
Capacity form/unform 270/ MB Heads 2| | |
Seek time / track 14.0/ 5.0 ms Sector/track | | |
Controller SCSI2 SI/FAST 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 5/12 V Temperature *C 4 50 | -40 65
Power: sleep 0.1 W Humidity % 8 85 | 5 95
standby 0.1 W Altitude km 3.000| 12.000
idle 3.7 W Shock g 10 | 70
seek 4.6 W Rotation RPM 3600
read/write 4.6 W Acoustic dBA 34
spin-up W ECC Bit ON THE FLY,REED SOLOMON
MTBF h 300000
Warranty Month 24
Lift/Lock/Park YES Certificates CSA,FCC,IEC950,TUV,UL1950,VDE
Layout
QUANTUM MAVERICK 270/540S PRODUCT MANUAL 81-106845-01, 6/20/1994
+---------------------------------------------------------+ | +-+ HDA J13 *** +-+-+-+ | +-| | Connector *** +-+-+-+ ++ |XX +-| | on Cable A0 A1 A2 || |XX | +-+ || |XX I | || |XX N | ++ |XX T J11B | Terminating |XX E | Resistor Packs ++ |.X R | || |XX F | || |XX A | || |XX C | ++ |XX E | |XX1 | | |1+LED |XX J11A |++J12 |XX Power +---------------------------------------------------------+ 1
Jumpers
QUANTUM MAVERICK 270/540S PRODUCT MANUAL 81-106845-01, 6/20/1994
Jumper Setting
==============
x = Jumper set at factory
J13 RESERVED
------------
CAUTION
These jumpers are reserved for factory use only. Installing a jumper
at any of these locations terminates normal drive operation.
On the drive printed circuit board assembly (PCBA), there are three
pairs of jumper pins that allow you set the drive's SCSI address.
When you change a jumper setting, the new setting is in effect when
the drive is next powered on.
Used in combination, the jumper setting accross pins A2, A1, and A0
determine the Maverick 270/540S hard disk drive's SCSI-bus device
identification (SCSI ID). By default, Quantum configures the drive
with a SCSI ID of six - that is, with jumpers installed across the
pins labeld A2 and A1 and no jumper installed across the pins labeld
A0.
Default Settings for Address Jumpers ------------------------------------ +---------+-------------------+-----------------------------+ |Jumper | Default Setting | Description | +---------+-------------------+-----------------------------+ | A2 | ON | A2, A1, and A0 are used in | | A1 | ON | combination to determine the| | A0 | OFF | drive's SCSI ID. | | | | The default SCSI ID is 6. | +---------+-------------------+-----------------------------+
Note: ON indicates a jumper is installed.
OFF indicates that no jumper is installed.
SCSI ID Jumper Settings
-----------------------
+------------------------------+----------+ | Jumper settings | SCSI ID | +---------+---------+----------+----------+ | A2 | A1 | A0 | | +---------+---------+----------+----------+ | OPEN | OPEN | OPEN | 0 | +---------+---------+----------+----------+ | OPEN | OPEN | CLOSED | 1 | +---------+---------+----------+----------+ | OPEN | CLOSED | OPEN | 2 | +---------+---------+----------+----------+ | OPEN | CLOSED | CLOSED | 3 | +---------+---------+----------+----------+ | CLOSED | OPEN | OPEN | 4 | +---------+---------+----------+----------+ | CLOSED | OPEN | CLOSED | 5 | +---------+---------+----------+----------+ |x CLOSED | CLOSED | OPEN | 6 | +---------+---------+----------+----------+ | CLOSED | CLOSED | CLOSED | 7 | +---------+---------+----------+----------+
The SCSI bus supports up to eight devices, including the host system.
A device's identification number determines its priority and must
unique in the system.
DC Power and pin connector assignments
--------------------------------------
+------------+ pin 1 +12 VDC
| 4 3 2 1 | pin 2 +12 V Return (Ground)
+------------+ pin 3 + 5 V Return (Ground)
pin 4 + 5 VDC
Note: Labels indicate the pin numbers on the connector. Pins 2 and 3
are connected together on the drive.
Install
QUANTUM MAVERICK 270/540S PRODUCT MANUAL 81-106845-01, 6/20/1994
Notes on Installation
=====================
Orientation
-----------
The mounting holes on the Maverick 270/540S hard disk drive allow the
drive to be mounted in any orientation.
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
| | | | | |
+---------------------+ | +-----+ +-----+ |
+-+-----------------+-+ +--+ +--+
| |
| |
+-----------------+
Mounting
--------
For mounting, #6-32 UNC screws are recommended. To avoid stripping
the mounting-hole threads, the maximum torque applied to the screws
must not exceed 8 inch-pounds.
Terminating Resistors
---------------------
At the factory, Quantum installs two resistor networks in sockets on
the drive PCBA to terminate the SCSI bus. Only the first device -
usually the host - and the last device on a SCSI bus should contain
terminating resistors. When installing the Maverick 270/540S
hard disk drive in any other position on the SCSI bus, remove the
terminating resistors.
Clearance
---------
The printed-circuit board assembly (PCBA) is very close to the
mounting holes. Clearance from the drive to any other surface -
except mounting surfaces - must be 1.25 millimeters (0.05 inches)
minimum. Do not use mounting screws longer than 3.5 mm (4.3 mm side).
The specified screw length allows full use of the mounting-hole
threads, while avoiding damaging or placing unwanted stress on the
PCBA.
CAUTION
The printed-circuit board (PCB) is very close to the mounting holes.
Do not exceed the specified length for the mounting screws. The
specified screw length allows full use of the mounting-hole threads,
while avoiding damaging or placing unwanted stress on the PCB. To
avoid stripping the mounting-hole threads, the maximum torque
applied to the screws must not exceed 8 inch-pounds.
Ventilation
-----------
The Maverick 270/540S hard disk drive operates without a cooling
fan, provided the ambient air temperature does not exceed 122*F
(50*C).
Cable Connector
---------------
The Maverick 270/540S has a combination DC/SCSI cable connector.
The drive's combination DC/SCSI connector part number is Dupont
90910-001, 2 in 1 SMT.
+----------------------------------------+
| |
| |
| +-----J11-Section-B----------Section-A |
| |+-------------------------++4-3-2-1+| |
| ||oooooooooooooooooooooooo1||O O O O|| |
| ||ooooooooooooooooooooooooo|| || |
| |+-------------------------++-------+| |
+-+------------------------------------+-+
Recommended header connector and strain relief:
50-pin connector base part AMP P/N 1-746195-2 or equivalent
50-pin connector strain relief AMP P/N 499508-2 or equivalent
Recommended mating connector and their part numbers:
4-pin connector (J11 section A) AMP P/N 1-480424-0 or equivalent
Loose-piece contacts AMP P/N 61173-4 or equivalent
Strip contacts AMP P/N 350078-4 or equivalent
---------------+ +------------+| pin 1 +12 VDC | 4 3 2 1 || pin 2 +12 Volts Return +------------+| pin 3 + 5 Volts Return ----------------+ pin 4 + 5 VDC
Labels indicate the pin numbers on the connector. Pin 2 and 3 are
connected together on the drive.
LED Connector (J12) ------------------- The LED connector my be used to connect an external LED for the pur- pose of monitoring drive activity. A 220-ohm resistor is connected in series from the +LED pin to +5 volts. The -LED pin is connected to a switching transistor on the drive that turns on and lights the LED when the disk is performing a read or write operation. When no read or write operation is taking place, the transistor turns off and the LED is extinguished.
+---------------------+--------------------------------+ | J12 Pins | Mating Connector Type and Part | |Pin Number| Function | Number (or equivalent) | +----------+----------+--------------------------------+ | 1 | -LED | Two-position housing: | +----------+----------+ Molex P/N 51021-0200 | | 2 | +LED | Loose-piece contacts: | | | | Molex P/N 50058-8100 | +----------+----------+--------------------------------+
Power Sequencing ---------------- You can apply the power in any order or manner, or short or open either the power or power-return line with no loss of data or damage to the disk drive. However, data may be lost in the sector being written at the time of power loss. The drive can withstand transient voltages of +10% to -100% from nominal while powering up or down.
Head/Disk Assembly
------------------
The head/disk assembly (HDA) contains the mechanical subassemblies of
the drive, which are sealed under a metal cover. The HDA consists of
the disk stack assembly, rotary positioner assembly, headstack
assembly, actuator latch assembly, and base casting which includes
the DC motor assembly. Assembly of the HDA takes place in a Class-
100 clean room. These subassemblies are not adjustable or field-
repairable.
Caution: To ensure that the air in the HDA remains free of contamina-
tion, never remove or adjust its cover and seals. Tampering with the
HDA voids your warranty.
The Maverick 270S has one magnetic disk and teo read/write heads,
while the Maverick 540S has two disks and four read/write heads.
DC Motor Assembly
-----------------
Integral with the base casting, the DC motor assembly is a rotating-
shaft, brushless DC spindle motor that drives the counter-clockwise
rotation of the disks.
Disk Caching
------------
The Maverick 270/540S hard disk drive incorporates DisCache, a 96K
disk cache, to enhance drive performance. This integrated feature can
significantly improve system throughput. Read and write caching can
be enabled or disabled using the MODE SELECT command. (The upper 32K
is used for firmware).
Track and Cylinder Skewing
--------------------------
+-------+---------+------+---------+
| Zone |Sectors |Track | Cylinder|
| Number|Per Track|Skew | Skew |
| | |Wedge | Wedge |
+-------+---------+------+---------+
| 15 | 58 | 28 | 32 |
+-------+---------+------+---------+
| 14 | 65 | 28 | 32 |
+-------+---------+------+---------+
| 13 | 69 | 28 | 32 |
+-------+---------+------+---------+
| 12 | 74 | 28 | 32 |
+-------+---------+------+---------+
| 11 | 78 | 28 | 32 |
+-------+---------+------+---------+
| 10 | 83 | 28 | 32 |
+-------+---------+------+---------+
| 09 | 88 | 28 | 32 |
+-------+---------+------+---------+
| 08 | 93 | 28 | 32 |
+-------+---------+------+---------+
| 07 | 97 | 28 | 32 |
+-------+---------+------+---------+
| 06 | 104 | 28 | 32 |
+-------+---------+------+---------+
| 05 | 108 | 28 | 32 |
+-------+---------+------+---------+
| 04 | 112 | 28 | 32 |
+-------+---------+------+---------+
| 03 | 114 | 28 | 32 |
+-------+---------+------+---------+
| 02 | 118 | 28 | 32 |
+-------+---------+------+---------+
| 0,1 | 118 | 28 | 32 |
+-------+---------+------+---------+
|System | 94 | 28 | 32 |
+-------+---------+------+---------+
Automatic Actuator Lock
-----------------------
To ensure data integrity and prevent damage during shipment, the
drive uses a dedicated landing zone and Quantum's patented AIRLOCK.
The AIRLOCK holds the headstack in the landing zone whenever the
disks are not rotating. It consists of an air vane mounted near the
perimeter of the disk stack and a locking arm that restrains the
actuator arm assembly.
When DC power is applied to the motor and the disk stack rotates, the
rotation generates an airflow on the surface of the disk. As the flow
of air across the air vane increases with disk rotation, the locking
arm pivots away from the actuator arm, enabling the headstack to move
out of the landing. When DC power is removed from the motor, an
electric return mechanism automatically pulls the actuator into the
landing zone, where the AIRLOCK holds it in place.
Acoustics --------- +-----------------+-----------------+----------+ | Operating Mode | Measured Noise | Distance | +-----------------+-----------------+----------+ | Idle On Track | 34 dBA (mean) | 39.3 in | | | 38 dBA (maximum)| (1 m) | +-----------------+-----------------+----------+ | Seeking (Random)| 39 dBA (mean) | 39.3 in | | | 42 dBA (maximum)| (1 m) | +-----------------+-----------------+----------+
Features
QUANTUM MAVERICK 270/540S PRODUCT MANUAL 81-106845-01, 6/20/1994
Product Overview
----------------
Quantum's Maverick 270/540S hard disk drives are a part of a family
of high-performance, 1-inch-high, hard disk drives manufactured to
meet the highest product quality standards. Maverick drives use
nonremovable, 3 -inch hard disks.
The Maverick 270/540S hard disk drives feature an embedded SCSI
drive controller and use SCSI commands to optimize system
performance. The drive manages media defects and error recovery
internally, so these operations are transparent to the user.
The innovative design of Maverick 270/540S hard disk drives
enables Quantum to produce a family of low-cost, high-reliability
drives.
Formatted Capacity
------------------
At the factory, the Maverick 270/540S receives a low-level
format that creates the actual tracks and sectors on the drive.
Reliability
-----------
Mean Time Between Failures (MTBF):
150,000 Power On Hours (POH), typical usage
The Quantum MTBF numbers represent Bell-Core MTBF predictions at
ambient operating conditions and represent the minimum MTBF that
Quantum or a customer would expect from the drive. Quantum's ongoing
reliability testing and field return data has historically confirmed
an actual MTBF of twice the Bell-Core prediction.
Preventive Maintenance (PM): Not required
Mean Time To Repair (MTTR): 30 minutes
Start/Stop: 20,000 cycles (minimum)
Component Life: 5 Years
Error Detection and Correction
------------------------------
As disk drive areal densities increase, obtaining extremely low error
rates requires a new generation of sophisticated error-correction
codes. Quantum Maverick 270/540S series hard disk drives implement
112-bit single- and double-burst Reed-Solomon error-correction
techniques to reduce the uncorrectable read error rate to less than
one bit in 1 x 10(14) bits read.
When errors occur, an automatic retry and a more rigorous double-
burst correction algorithm enable the correction of any sector with
two bursts of three incorrect bytes each or up to six multiple
random one-byte burst errors. In addition to these advanced error
correction capabilities, the drive's additional cross-checking code
and algorithm double checks the main ECC correction to greatly re-
duce the probability of miscorrection.
Multiple Random Burst Errors
----------------------------
The drive's ECC can correct up to 48 bits of multiple random errors,
provided that the incorrect bytes follow the guidelines for
correctablle double burst errors. Up to 24 bits of multiple random
errors can be corrected on-the-fly if only one byte per interleave
contains an error. If more than two bytes in any one interleave are
in error, the sector cannot be corrected.
Defect Management
-----------------
The Maverick 270/540S allocates one sector per cylinder as a spare.
In the factory, the media is scanned for defects. If a sector on a
cylinder is found to be defective, the address of the sector is added
to the drive's defect list. Sectors located physically subsequent to
the defective sector are assigned logical block addresses such that a
sequential ordering of logical blocks results. This inline sparing
technique is employed in an attempt to eliminate slow data transfer
that would result from a single defective sector on a cylinder.
If more than one sector is found defective on a cylinder, the inline
sparing technique is applied only to the first sector. The remaining
defective sectors are replaced with the nearest available spare
sectors on nearby cylinders. Such an assignment of additional
replacement sectors from nearby sectors rather than having a central
pool of spare sectors is an attempt to minimize the motion of the
actuator and head that otherwise would be needed to find a replace-
ment sector. The result is minimal reduction of data throughput.
Seek Time
---------
+----------------------------------+--------+
| |270/540S|
+----------------------------------+--------+
|Track-to-Track msec. typ. | 5 |
+----------------------------------+--------+
|Average msec. typ. | 14 |
| msec. max. | 28 |
+----------------------------------+--------+
|Sequential Head Switch msec. | 4.5 |
+----------------------------------+--------+
|Latency msec. avg. | 8.33 |
+----------------------------------+--------+
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