IBM Ultrastar 9LP User manual

Features Benefits
MM 9.11GB and 18.22GB formatted capacities (512 byte/sector) MM Range of capacities to meet the need for increasing storage requirements
MM Industry standard interface MM Fast interface data rates
MM 50 pin ANSI SCSI-3 MM 20MB/sec data transfer speed
MM 68 pin ANSI SCSI-3 MM 40MB/sec (Fast 20) & 80MB/sec (Fast 40) data transfer speed
MM 80 pin ANSI SCSI-3 MM 40MB/sec (Fast 20) & 80MB/sec (Fast 40) data transfer speed
MM 11.52-22.40 MB/s media data rate (instantaneous) MM High data rate across entire disk surface
MM 8-16.0 MB/s media data rate (functional)
MM Rotational speed 7200 RPM
MM Average seek time 6.5ms (9.11GB) 7.5ms (18.22GB) MM Fast access to data
MM Latency 4.17 ms
MM 1MByte multi-segmented dual port data buffer MM Fast data retrieval in single and multitasking applications
MM Low command overhead MM Read ahead caching MM Improved data throughput
MM ECC on the fly (EOTF)
MM Industry standard mounting MM Ease of installation
MM Predictive Failure Analysis (S.M.A.R.T. Compliant) MM High reliability and availability
IBM OEM has introduced a new range of drives
intended for advanced storage applications
which demand fast access to large amounts of
data.
The drives spin at 7200 rpm, have an EPRML
channel, embedded sector servo, S.M.A.R.T and
media data rate 11.52-22.40MB/s.
Applications
MM Technical/commercial workstations
MM Network servers
MM Mass storage arrays
MM High end personal computers
MM Large scale imaging and graphics
MM Video servers
MM Video editing
IBM OEM Storage Products
IBM
Ultrastar 9LP & 18XP
DGHS-39110 and DGHS-318220
Models: SCSI-3 FAST20 (50pin Single-Ended)
SCSI-3 FAST20 (68pin Single-Ended or Differential)
SCSI-3 FAST20 (80pin Single-Ended SCA-2)
SCSI-3 FAST40 (68 & 80pin (L)ow (V)oltage (D)ifferential)

Connectors
The electrical connectors are located as
shown.
Pin 1
Electrical Connectors (rear view) 80 Pin SCA models
Power Pin 1
4321
Pin 2Pin 35
SCSI Pin 1
Aux Connector Pin 1
Electrical Connectors (rear view) 68 Pin models
4321
Power Pin 1SCSI Pin 1
Electrical Connectors (rear view) 50 Pin models
Pin 1
(15X)2 mm 2.54 mm*
Jumper Pin locations (front view) - all models
* Not available on 80 Pin SCA
Note : See electrical interface specifications
for power pin assignment.
The DC power connector is designed to mate
with AMP part 1-480424 (using AMP pins P/N
350078-4). Equivalent connectors may be
used.
Pin assignments are shown below, as viewed
from the end of the drive.
43 21
Pin Voltage
1 +12 V
2GND
3GND
4+5V
Option Block
Jumper Settings
Jumper position and function are as shown below. Pin pitch is 2mm.
Termination power enable 2.54mm pitch.
01
Reserved
Reserved
10 12 14 16 18
Ground Ground Ground Termination
Power Enable
1 3 5 7 11 13 15 17 19 21 23 25 27 29 31
2 4 6 8 20 22 24 26 28 30 32
Enable Active Termination +5V
2
SCSI
AddressNot
Used
Blank
Ground
External Activity LED Write Protect
Auto Start Delay
Disable Sync Negotiations
Disable SCSI Parity
Disable Unit Attention
Reserved
Reserved
Reserved
Auto Start
50 Pin Single Ended Front Option Block and TermPower Block.
Reserved Reserved
Ground Ground Ground Termination
Power Enable
1 3 5 7 11 13 15 17 19 21 23 25 27 29 31
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
Enable Active Termination +5V
012
SCSI Address
Blank
Auto Start
Ground
External Activity LEDWrite Protect
Auto Start Delay
Disable Sync Negotiations
Disable SCSI Parity
Disable Unit Attention
3Disable Wide
Negotiations
Reserved
Reserved
68 Pin Single Ended Front Option Block and TermPower Block.
68 Pin Differential Option Jumper Block.
Ground Ground
1 3 5 7 11 13 15 17 19 21 2325 27 29 31
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
+5V
012
SCSI Address
Blank
Auto Start
Ground
External Activity LED Write Protect
Auto Start Delay
Disable Sync Negotiations
Disable SCSI Parity
Disable Unit Attention
3Disable Wide
Negotiations
Reserved
Reserved
Reserved
80 Pin SCA-2 Front Option Jumper Block.

68 Pin Auxiliary Connector
12
Pin # 11 9 7 5 3 1
10 8 6 4 2
+5V ID3 ID2 ID1 ID0
SCSI Address
Enable Active Termination
(Unusedfordifferential models)
Write Protect Unused
Ground AutoSpinStart
External ActivityLED
Reserved
SCSI ID (Address) Pins
Note: In the address determination
tables, “off” means jumper is not
in place and “on” means jumper
is in place.
Bit 3 Bit 2 Bit 1 Bit 0 Address
off off off off 0
off off off on 1
off off on off 2
off off on on 3
off on off off 4
off on off on 5
off on on off 6
off on on on 7
on off off off 8
on off off on 9
on off on off 10
on off on on 11
on on off off 12
on on off on 13
on on on off 14
on on on on 15
Address Determination
68 and 80 pin models
Bit 2 Bit 1 Bit 0 Address
off off off 0
off off on 1
off on off 2
off on on 3
on off off 4
on off on 5
on on off 6
on on on 7
Address Determination of 50 pin
models
Auto Start and Delay Pins
The Auto Start and Auto Start Delay
pins control when and how the drive
can spin up and come ready.
When configured for Auto-Startup, the
motor spins up after power is applied
without the need of a SCSI Start Unit
command. For no Auto-Start, a SCSI
Start Unit command is required to make
the drive spin and be ready for media
access operations. When in Auto-Start
mode, the drive will delay its start time
by a period of time multiplied by its own
SCSI address.
Pins (50 and 68 Drive
interface pin models) Behaviour
Auto Auto Auto Delay(sec)
Start Delay Start Start Multiplier
off off No N/A
off on Yes 0
on off Yes 10
on on Yes 4
Auto-Startup Modes selectable by
Auto-Start/Delay Pin Combinations.
Pins (80 interface Drive
pin model) Behaviour
Auto Auto Auto Delay(sec)
Start Delay Start Start Multiplier
off off Yes 0
off on No N/A
on off Yes 10
on on No N/A
Auto-Startup Modes selectable by
Auto-Start/Delay Pin Combinations.
PACKAGING: The drive must
be protected against
electrostatic Discharge
especially when being handled.
The safest way to avoid
damage is to put the drive in an anti
static bag before ESD wrist straps etc.
are removed.
Drives should only be shipped in
approved containers, severe damage
can be caused to the drive if the
packaging does not adequately protect
against the shock levels induced when
a box is dropped. Consult your IBM
marketing representative if you do not
have an approved shipping container.
External Activity (LED) Pins
The LED pins can be used to drive an
external Light Emitting Diode. Please
refer to the LED pin section of the
Ultrastar Interface Specification for a
detailed functional description of this
pin, which is controlled by Mode Select
(Page 0). Up to 33mA ( 5%) of TTL
level LED drive capability is provided.
Current limiting for the LED is provided
on the electronics card. The LED Anode
may be tied to the + 5V source provided
on pin 18 of the Front Option Jumper
Block, pin 11 of the Auxiliary connector
on the 68 pin Unitised connector or the
5V power source on the 80 pin SCA
model. The LED Cathode is then
connected to the EXTERNAL ACTIVITY
Pin to complete the circuit.
Note: 68 pin and 80 pin SCA SCSI
models have two sets of pins, a
set on the front and a set on the
back, that are connected to the
same LED driver circuit. The
combined drive capability is
stated above.
Write Protect Pin
If the Write Protect pin is jumpered to
ground, the drive will prohibit SCSI
commands that alter the customer data
area portion of the media from being
performed. The state of this pin is
monitored on a per command basis.
See the Ultrastar 9LP & 18XP interface
specification for functional details.

Disable T.I. Sync. Negotiation Pin
If a Disable Target Initiated
Synchronous Negotiation pin is
grounded then an Initiator is required to
start a negotiation handshake if
Synchronous and/or ‘Wide’ (Double
Byte) SCSI transfers are desired.
Please refer to the Ultrastar 9LP &
18XP Interface Specification for more
details on this feature.
Disable SCSI Parity Pin
Grounding this pin will disable SCSI
Parity checking.
Disable Unit Attention Pin
Grounding this pin will disable the drive
from building Unit Attention Sense
information for commands immediately
following a Power On Reset (POR) or
SCSI Bus Reset. Any pending Unit
Attention conditions will also be cleared
at POR or SCSI Reset times.
Disable Wide Negotiations
Jumpering pin 31 to 32, will cause the
68 pin SE, 80 pin SCA, or the 68
Differential to operate in a Single Byte
mode. The drive will not negotiate for
‘Wide’ (Double Byte) operation.
Enable Active Termination
Single Ended 50 and 68 pin models are
available with on card SCSI Bus Active
Terminators. The Active Termination
feature can be enabled by installing a
jumper between pins 13 and 14 of the
Front Option Jumper Block or
connecting pins 9 and 10 of the
Auxiliary Connector on 68 SCSI pin
models. SCA-2 80 pin has no
termination.
Data Organisation
Model 9.11GB 18.22GB
Disks 5 10
User data heads 10 20
Seek times (in milliseconds)
Single Cylinder (Read) 0.7 0.7
(Write) 2.0 2.0
Average(weighted)(Read) 6.5 7.5
(Write) 7.5 8.5
Full stroke (Read) 14.0 17.0
(Write) 16.0 19.0
User capacity for several block
lengths 9.11 GB Models
User bytes/ formatted logical
logical capacity blocks/
block (bytes) drive
512 9,173,114,880 17,916,240
514 9,138,663,000 17,779,500
520 9,063,381,600 17,429,580
522 9,048,400,200 17,334,100
524 9,046,346,480 17,264,020
528 9,085,718,400 17,207,800
536 9,118,437,360 17,012,010
688 9,377,508,800 13,630,100
732 9,413,388,240 12,859,820
18.22 GB Models
User bytes/ formatted logical
logical capacity blocks/
block (bytes) drive
512 18,351,959,040 35,843,670
514 18,283,057,100 35,570,150
520 18,132,478,000 34,870,150
522 18,102,432,780 34,678,990
524 18,098,346,920 34,538,830
528 18,177,133,920 34,426,390
536 18,242,658,160 34,034,810
688 18,760,955,040 27,268,830
732 18,832,742,280 25,727,790
User bytes/logical block 512 to 732
Mode Select Options
Certain parameters are alterable using
the SCSI ‘Mode Select’ command. This
allows certain drive characteristics to be
modified to optimise performance on a
particular system. Refer to the Ultrastar
SCSI Functional Specification for a
detailed definition of Mode Select
parameters.
DC Power Requirement Limits
The following voltage specification
apply at the drive power connector.
There are no special power on/off
sequencing requirements.
+5 Volt Supply ±5.0%(during run and spin up)
+12 Volt Supply ±5.0% (during run)
+5.0% / -7.0%(during spin up)
9.11GB Power Supply Current +5VDC
Population
Notes Mean
Idle average 0.78 Amps1
R/W average 1.03 Amps
R/W pulse peak 1.25 Amps
18.22GB Power Supply Current +5VDC
Idle average 0.78 Amps
R/W average 1.03 Amps
R/W pulse peak 1.25 Amps
9.11GB Power Supply Current +12VDC
Idle average 0.45 Amps
Seek peak 2.07 Amps
Spin-up 1.6 Amps2
18.22GB Power Supply Current +12VDC
Idle average 0.77 Amps
Seek peak 2.43 Amps
Spin-up 2.7 Amps2
Notes:
1. 5 Volt Current is given with
termination power provided by the
using system.
2. The current at start is the total 12
volt current required (i.e.. the motor
start current, module current and
voice coil retract current).
Externally generated ripple
Power Supply Generated Ripple as
seen at drive power connector.
Voltage Maximum Notes
+5V DC 200mV peak-to-peak 0-20 MHz
+12V DC 200mV peak-to-peak 0-20 MHz
During drive start up and seeking, 12
volt ripple is generated by the drive
(referred to as dynamic loading). If
several drives have their power daisy
chained together then the power supply
ripple plus other drives dynamic loading
must remain within the regulation
tolerance window of ±5%. A common
drive supply with separate power leads
to each drive is a more desirable
method of power distribution.

Hot plug/unplug support
The drives do support Hot Plug/Unplug
-refer to Ultrastar 9LP & 18XP
Hardware/ Functional Specification for
more details. Hot plugging the SCSI
bus may cause glitches on the bus. To
minimise the chance of glitching, it is
recommended to plug in the SCSI bus
before the power is applied.
During hot plugging, the supplies must
not go over the upper voltage limits.
This means that proper ESD protection
must be used during the plugging
event. Care must be taken not to
exceed shock limits whilst hotpluging or
unplugging.
50 Pin SCSI Signal Connector
50 pin models use an AMP PN 84412-1
connector. The connector is compatible
with the ANSI SCSI ‘A’ connector
specifications. It is limited to 8 bit data
transfers only.
Notes:
“SEF” stands for Single Ended Fast
“SEFW” stands for Single Ended Fast
Wide
“DFW” stands for Differential Fast Wide
50 pin SCSI connector models offer an
8 bit SCSI bus using the SCSI “A”
connector.
68 pin SCSI connector model offers an
8/16 bit SCSI bus using the SCSI “P”
connector which supports Wide data
transfers.
80 pin SCSI connector models offer an
8/16 bit SCSI bus using the SCA
connector.
All models support Fast SCSI data
transfers and the U, X and Y models
also support SCSI-3 FAST 20 data
transfer.
68 Pin SCSI Signal Connector
68 pin models use an MOLEX
connector (PN 87360-0001) that is
compatible with the ANSI SCSI “P”
connector specifications. It can transfer
data in both 8 bit (narrow) and 16 bit
(wide) modes. Both single-ended and
differential versions are supported. The
differential 68 pin models are
electrically compatible with differential
50 pin models and other 50 pin
differential SCSI products and therefore
can coexist on the same bus. In order
to do so, the differences in connector
types would need to be accounted for in
the cable. Connecting 68 and 50 pin
single-ended models to the same bus
can also coexist. Differential and
single-ended models do not work
connected to the same bus.
80 Pin (Single Connector
Attachment)
80 pin SCA-2 models use an AMP
connector (PN 5-917593-9) that is
compatible with the specification of:
‘Single Connector Attachment for Small
SCSI Disk Drives’ SFF 8046. It can
transfer data in both 8 bit (Narrow) and
16 bit (wide) modes.
Note: The “SCA-2” connector is not
mechanically compatible with the
50 pin “A” connector or the 68 pin
“P” connector as defined in the
ANSI SCSI standard. This
connector is intended for direct
backplane attachment and is not
intended to be cable attached to
the bus.
SCSI Bus Cable
Single-ended models permit cable
lengths of up to 6 metres (19.68 feet). It
should be noted however that users
who plan to use ‘Fast’ data transfers
with single-ended models should follow
all of the ANSI SCSI guidelines for
single-ended ‘Fast’ operations. This
may include a cable length of less than
6 metres.
SCSI 3 Fast 20 models can be cable
connected to a 3 metre (9.8 feet) cable
when a maximum of 4 devices are
attached, and a 1.5 metre (4.9 feet)
cable with up to 8 devices attached.
SCA-2 connector models are not
designed for directcable attachment
due to the combination of power and
SCSI bus signals. ‘Fast & Fast 20’ data
transfers with SCA models should
follow all of the ANSI SCSI guidelines.
Differential models permit cable lengths
of up to 25 metres (82.02 feet). Cables
must meet the requirements for
differential cables as set forth in the
ANSI SCSI standard under ‘Cable
Requirements -Differential Cable’.
The ANSI SCSI standard states that
any stub from main cable must not
exceed 0.1 metres for single-ended
cables and 0.2 metres for differential
cables. Ultrastar 9LP & 18XP has a
maximum internal stub length of 0.05
metres on all ‘single-ended’ SCSI
signals, and 0.1 metres on all
‘differential’ SCSI signals. To remain
compliant with the standard the SCSI
bus cable must not add more than 0.05
metres additional stub length to any of
the single-ended SCSI signals or 0.10
metres to any differential SCSI signals.
Models
DGHS Capacity GB SCSI Pins/ SCSI Electrical
Model No. (at 512 Byte) Connector Type Signal Type
09Z 9.11 50 SEF
09U 9.11 68 SEFW
09X 9.11 68 DFW
09Y 9.11 80 SCA-2 SEFW
18Z 18.22 50 SEF
18U 18.22 68 SEFW
18X 18.22 68 DFW
18Y 18.22 80 SCA-2 SEFW

SCSI Bus Terminators (Optional)
For those drives having the Active
Termination feature, this function can
be enabled by installing a jumper
between pins 13 and 14 of the Front
Option Jumper Block or connecting pins
9 and 10 of the Auxiliary Connector on
68 SCSI pin models. The using system
is responsible for making sure that all
required signals are terminated at both
ends of the cable.
80 pin SCA models do not have internal
SCSI bus terminators.
Some external terminator possibilities
for single-ended cabled systems are
listed below:
50 Pin Model 68 Pin Model
Terminators Terminators
Data Mate Data Mate
DM2000-02-R DM2050-02-68S
DM500-06-R DM2050-02-68R
Single-ended SCSI Terminators
Differential models do not have internal
SCSI bus terminators. Some terminator
possibilities are shown below:
68 Pin Model Terminators
Data Mate DM2050-01-68D
Differential SCSI Terminators
Note:
A Meritec model 940900-4 or a
DataMate DM5000-5068-11 can
be used to connect a 68 pin
connector to a 50 pin connector.
The drive will now perform 8 bit
transfers.
SCSI Bus Termination Power
Termination power is optionally
provided for systems that desire to use
it. In order to use the termination power,
the user needs to install a jumper
between pins 1 and 2 of the TermPower
Block. The jumper should only be
installed on one device, which should
be the last device on the SCSI bus. 68
pin models can source up to 2.0 Amps
of current at 5.0 Volts (±5%) for
termination power. 50 pin models can
source up to 1.5 Amps of current at 5.0
Volts (± 5%) for termination power.
SCSI Bus Termination Power Short
Circuit Protection
The ANSI SCSI specification
recommends for devices that optionally
supply TERMPWR, to include current
limited protection for accidental short
circuits. It also recommends that the
maximum current available for
TERMPWR should not exceed 2 Amps.
UL has a different requirement that they
call the 8 Amp rule. This rule states that
when a power source leaves an
enclosure (like SCSI TERMPWR in the
SCSI cable), it must trip 8 Amps of
current within 1 minute. The drive limits
current to 2.0 Amps through the use of
a resettable fuse mounted on the
electronic card. Systems may also
provide short circuit protection for drive
supplied TERMPWR by limiting the
current of the 5v power it supplies to the
drive.
Operating Environment
The drive operates within its’
performance limits when the following
environment is maintained. Product life
calculations are based on the nominal
environment for a typical application.
Humidity
Operating 5% to 90% non-condensing
Storage 5% to 90% non-condensing
Shipping 5% to 95% (applies at the
packaged level)
Wet Bulb Temperature
Operating and
Storage 80 F (26.7oC) maximum
Shipping 85 F (29.4oC) maximum
Elevation
Operating -1000 to 10000 feet
(-304 to 3048 meters)
Shipping/Storage -1000 to 40000 feet
(-304 to 12192 meters)
Temperature
Operating ambient 41 to 122oF (5 to 50oC)
Operating disk
enclosure 41 to 149oF (5 to 65oC)
Shipping -40 to 149oF (-40 to 65oC)
Storage 34 to 149oF (1 to 65oC)
Temperature Gradient
Operating 36oF (20oC) per hour
Shipping/Storage Below condensation
These temperature limits are extremely
important and must not be exceeded at
the worst case drive and system
operating conditions with the drive
randomly seeking, reading and writing.

Note: If a RESET is issued before the
drive comes ready the power on
sequence will start again. In all other
cases when a RESET is issued the
present state of the motor is not altered.
WARNING: This disk drive can be
damaged by Electro-Static Discharge,
please follow recommended ESD
procedures before unpacking or
handling the drive. Ask your Dealer for
details if you need assistance.
Note: BATS is the abbreviation for
Basic Assurance Tests. Start-up
sequence spins up the spindle motor,
uploads code, performs BATS2 (verifies
read/write hardware), resumes
“Reassign in Progress” operations, and
more. For more information on the
start-up sequence, refer to the Ultrastar
9LP & 18XP Interface Specification.
Mechanical Specifications
Weight
9.11GB Approx 1.26 pounds (0.57 Kg)
18.22GB Approx 2.04 pounds (0.93 Kg)
Dimensions Inches S.I.Metric
Height
9.11GB 1.00 in 25.4 mm
18.22GB 1.63 in 42.0 mm
Width 4.00 in 101.85 mm
Depth 5.75 in 147.0 mm
Vibration and Shock
Operating/Nonoperating Vibration
Due to the complexity of this subject we
recommend that users contact the
Distributor to discuss how to perform
the required measurements if they
believe this to be an area which
requires evaluation.
Operating Shock
No permanent damage will occur to the
drive when subjected to a 10 G half
sine wave shock pulse of 11
milliseconds duration. The shock pulses
are applied in each of three mutually
perpendicular axis, one axis at a time.
Nonoperating Shock
Translational Shock
No damage will occur if the unpackaged
drive is subjected to a square wave
shock less than 35 Gs applied to all
three axis for a period of 20
milliseconds, one direction at a time.
Additionally, no damage will occur if the
unpackaged 9.11GB drive is not
subjected to an 2 millisecond half sine
wave shock greater than 150Gs applied
to all three axis, one direction at a time.
Additionally, no damage will occur if the
unpackaged 18.22GB drive is not
subjected to a 2 millisecond half sine
wave shock greater than 140Gs applied
to all three axis, one direction at a time.
For the 1.0” models, no degradation in
A-weighted idle sound power will occur
if the unpackaged drive is limited to a 2
milliseconds half sine pulse shock of
150Gs or less applied in the axial
direction (z axis), or 300Gs or less
applied in radial direction (x-y plane).
For the 1.6” models, no degradation in
A-weighted idle sound power will occur
if the unpackaged drive is limited to a 2
milliseconds half sine pulse shock of
70Gs or less applied in the axial
direction (z axis), or 150Gs or less
applied in the radial direction (x-y
plane). The average A-weighted idle
sound power will increase by 0.3 Bels if
the unpackaged drive is subjected to a
2 milliseconds half sine pulse shock of
110Gs applied in the axial direction (z
axis), or 210Gs applied in the radial
direction (x-y plane).
Rotational Shock
The actuator will remain latched in the
disk landing zone if the unpackaged
drive is subjected to a 2ms half sine
pulse shock of 15,000 radians per
second squared or less applied to all
three axis, one direction at a time.
Start and Stop Times
Time Nominal Maximum Nominal Maximum
Models 9.11GB 9.11GB 18.22GB 18.22GB
Power Up 2.5 3.0 2.5 3.0
Start-up 17 45 16.5 45
Spin-up 11 30 10.5 30
Spindle Stop 15 15 15 15
All times in seconds
Bring-up Sequence Times and Stop Time
Reset Init
and Test of
Controller
Enable
SCSI Bus
Power On Auto Start function enabled
or Start Unit command issued at this time.
File Ready to accept Read and Write commands.
Power-up Start-up Sequence
Spin-up Init. Servo BATS2 Complete Reassigns etc.

Clearances
A minimum of 2mm clearance should
be given to the bottom surface except
for a 10mm maximum diameter area
around the bottom mounting holes.
There should be 7mm of clearance
between Utrastar 9LP & 18XP drives
that are mounted with their top sides
facing each other. Drives from other
manufacturers may require additional
spacing due to stray magnetic fields.
For proper cooling it is suggested that a
minimum clearance of 7 mm be
provided under the drive and on top of
the drive.
Mounting
Refer to Ultrastar 9LP & 18XP
Hardware/ Functional Specification
“Drive Mounting Guidelines” for more
details on how to mount the drive.
The drive can be mounted with any
surface facing down. The drive has both
side and bottom mounting holes. Refer
to diagrams below for the location of
these mounting holes for each
configuration.
The maximum allowable penetration of
the mounting screws is 3.8 mm. Screws
longer than 3.8 mm may cause
permanent damage to the drive.
The recommended torque to be applied
to the mounting screws is 0.8 Newton
metres 0.2 Newton metres.
Grounding requirements of the disk
enclosure
The disk enclosure is at Power Supply
ground potential. It is allowable for the
user mounting scheme to common the
Disk Enclosure to Frame Ground
potential or to leave it isolated from
Frame Ground.
The drives mounting frame must be
within 150 millivolts of the drives power
supply ground. At no time should more
than 35 milliamps of current (0 to 100
Mhz) be injected into the disk
enclosure.
The following is a list of measurement
points and their temperature (maximum
and reliability). Maximum temperature
must not be exceeded at the worst case
drive and system operating conditions
with the drive randomly seeking,
reading and writing. Reliability
temperatures must not be exceeded at
the nominal drive and system operating
conditions with the drive randomly
seeking, reading and writing.
Maximum and Reliable
Operating Temperature Limits
Maximum Optimum
Disk Enclosure Top 149oF(65oC) 122oF(50oC)
Disk Enclosure
Bottom 149oF(65oC) 122oF(50oC)
Channel Module1203oF(90oC) 167oF(80oC)
SCSI Module 194oF(80oC) 158oF(60oC)
Microprocessor
Module 176oF(95oC) 140oF(75oC)
Controller Module 194oF(100oC) 158oF(75oC)
Spindle Motor
Driver Module 194oF(90oC) 158oF(80oC)
Location of side mounting holes.
* 42.0mm for 18.22GB models.
Note: Operating the file above the
maximum temperatures may cause
permanent damage.
Maximum recommended
temperatures are for nominal ambient
temperature.
Note: The diagrams below define where
measurements should be made.
Showing where the modules are located
on the bottom side of the card and the
measurement locations on the bottom
of the or top of the casting. There must
be sufficient air flow through the drive
so that the casting and module
temperature limits defined above are
not exceeded.
Module Temperature
Measurement Notes:
1. Centre on the top surface of the
module.
2. If copper tape is used to attach
temperature sensors, it should be no
larger than 6 mm square.
3. A thermal sensor is fitted to the
electronics card. Several temperature
thresholds are continuously monitored
and the results updated into the drive
log. This is used to provide a thermal
history and does not interrupt drive
operation.
60 +/- 0.2
101.5 +/- 0.2
147 MAX
(6X) 6-32UNC-2B X 3.8 MAX
6.35 +/- 0.25
*26.1MAX
101.6 +/- 0.25
41.25 +/- 0.5 44.45 +/- 0.25
95.25+/- 0.25
3.18 +/- 0.25
Temperature Measurements

IBMIBM
IBM OEM Europe
PO Box 41
North Harbour
Portsmouth
Hampshire
PO6 3AU
United Kingdom
Telephone: [phone]
IBM Corporation
Storage Systems Division
5600 Cottle Road
San Jose, CA 95193
[phone]
Japan Headquarters: (81) 466-45-1384
Asia-Pacific Headquarters: (65) 320-1503
Internet access at:
http://www.ibm.com/storage/hddtech
Registered in England: No. 741598
Registered Office: PO Box 41, North Harbour,
Portsmouth. Hampshire P06 3AU.
UK company-wide registration to ISO90001.
Certificate number FM12587.
IBM is the registered trademark of International
Business Machines Corporation.
AMP is a trademark of AMP Incorporated
Molex is a trademark of Molex Incorporated
DATA MATE is a trademark of AMP Incorporated
Other company, product and service names may be
trademarks or service marks of others.
Produced by European SIT Lab.
© International Business Machines Corporation 1997.
This data sheet is not a substitute for the full
production specification, which should be used when
detailed information is required.
Product Description data represents IBM’s design
objectives and is provided for comparative purposes;
actual results may vary based on a variety of factors.
This product data does not constitute a warranty.
Questions regarding IBM’s warranty terms or
methodology used to derive this data should be
referred to your IBM OEM representative. Data
subject to change without notice.
Date: 8th October 1997
Distributor:
Disk Enclosure
Bottom Motor Driver Module
Controller
Module
SCSI
Module
Channel
Module
Microprocessor
Module
87.0
51.0
61
51
Disk Enclosure Top