M 2 9 5 4 E A U / E Y F FUJITSU
Native| Translation
------+-----+-----+-----
Form 3.5"/SLIMLINE Cylinders 5713| | |
Capacity form/unform 4350/ MB Heads 9| | |
Seek time / track 11.5/ 2.0 ms Sector/track | | |
Controller SCSI3 SI/WI/U/F/SCA2 Precompensation
Cache/Buffer 506 KB MULTI-SEGMEN Landing Zone
Data transfer rate 9.900 MB/S int Bytes/Sector 512
20.000 MB/S ext SYNC
Recording method PR4ML operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 5 50 | -40 60
Power: sleep W Humidity % 20 80 | 5 95
standby W Altitude km 3.000| 12.000
idle W Shock g 5 | 50
seek W Rotation RPM 7200
read/write W Acoustic dBA 34
spin-up 11.5 W ECC Bit ON THE FLY
MTBF h 1000000
Warranty Month
Lift/Lock/Park YES Certificates
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L A Y O U T
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FUJITSU M2952E/2954E JUMPER SETTING
+---------------------------------------------------------+
| |XX
| |XXI
| |XXN
| |XXT
| 1----+ |XXE
| +----6 CN6 |XXR CN1
| |XXF
| |XXA
| |XXC
| |XXE
| |XX
| |XX
| |XX
+---------------------------------------------------------+
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J U M P E R S
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FUJITSU M2949E/M2952E/2954E JUMPER SETTING
Jumper Setting
==============
There is no SCSI ID setting terminal for SCA type model. Set the SCSI
ID using ID0, ID1, ID2, and ID3 signals on the SCSI interface
connector CN1.
CN6 Setting connection of the terminating resistor on SCSI interface
--------------------------------------------------------------------
CN6 3-4 OPEN Terminator resistor circuit for DB08 to DB15, DBP1
is not connected.
CLOSED Terminator resistor circuit for DB08 to DB15, DBP1
is connected.
When connecting the terminating resistor, use the spare plug
mounted on CN6 1-2.
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I N S T A L L
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FUJITSU M2952/2954 JUMPER SETTING
Notes on installation
=====================
Installation direction
----------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
| | | | | |
+---------------------+ | +-----+ +-----+ |
+-+-----------------+-+ +--+ +--+
| |
| |
+-----------------+
The drive will operate in all axis (6 directions). Inclination from
vertical or horizontal should not exceed 5".
Mounting screw fixing
---------------------
When the mounting screw holes on the side of the drive are used, then
only use two pairs of outer holes. Do not use the center hole in
conjunction with only one of the outer holes. The screws must not
penetrate the drive by more than 4 millimeters.
Cooling
-------
Allow space above and below the drive to provide for adequate air
flow. Fan cooling is recommended. The disk enclosure temperature
measured at top center, should never exceed 55*C.
Grounding
---------
This drive uses MR (Magneto Resistive) Heads. The disk enclosure (DE)
must not be connected to ground. The mounting frame is isolated from
the DE and this should be connected to ground via the mounting
screws.
Termination
-----------
A terminating resistor should be installed at both ends of the SCSI
bus. When shipped from the factory, this drive is terminated. If the
drive is to be used in the middle of the SCSI cable with other
terminated devices at the ends, or if external termination is to be
used, then the terminating resistor on the drive must be disabled.
Termination Power
-----------------
TMPWR must be supplied to the terminating resistor for correct
operation. This can be supplied from either the drive or the SCSI
bus. If external termination is to be used then TRMPWR should be
supplied to the SCSI bus.
Users must ensure that the Disk Enclosure casing is NEVER shorted to
the computer system's Frame or DC Ground.
Magneto-Resistive Read heads are a significant factor in the
achievement of very high capacities in small form factor hard disk
drives. The M2952 and M2954 drives use Magneto-Resistive (MR) heads
and therefore requires special handling considerations. The MR head
must be electrically biased in order to function, and Fujitsu uses
+5.5 VDC on thes drives. The voltage is generated by the drive
electronics from normal +5VDC and +12VDC rails, so standard power
supplies and connectors may be used.
With the MR heads biased in this way, it becomes importatnt to avoid
the possibility of discharge between the head and the media, so, in
order to ensure operational reliability, the disk enclosure (DE)
and hence the platters themselves are also biased to +5.5VDC rather
than DC Ground as would be the case on a conventional drive. Fujitsu
has taken steps to minimise the possibility of accidental shorting
by coating the DE with an electrically insulating material and by
removing the earthing tag that would normally by present. Also the
drive is protected against damage in the event of accidental shorting
through the use of a protection circuit in the head IC. This works by
quickly shutting off the bias voltage when it detects a voltage drop.
Any read or write operation during this time will result in a hard
data error.
When the short is removed the bias voltage is automatically restored
and read/write operations will again work normally. Pay close
attention to the mounting specifications of the drive ensuring that
no component of the system is likely to abrade the disk enclosure
surface.