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Hard Drive: FUJITSU: M2616ET 104MB 3.5"/SL IDE / AT

M 2 6 1 6 E T    FUJITSU
NO MORE PRODUCED                                      Native|  Translation
Form                 3.5"/SLIMLINE         Cylinders    1542|  771|     |
Capacity form/unform   104/      MB        Heads           4|    8|     |
Seek time   / track  20.0/ 8.0 ms          Sector/track   33|   33|     |
Controller           IDE / AT              Precompensation 65535
Cache/Buffer            56 KB FIFO BUFFER  Landing Zone     1541
Data transfer rate    1.250 MB/S int       Bytes/Sector      512
                      7.400 MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
Supply voltage     5/12 V       Temperature *C         5 45    |    -45 60
Power: sleep              W     Humidity     %        20 80    |      5 95
       standby        2.5 W     Altitude    km    -0.060  3.000|        12.000
       idle               W     Shock        g         5       |     50
       seek           5.5 W     Rotation   RPM      3490
       read/write     5.5 W     Acoustic   dBA        43
       spin-up            W     ECC        Bit   32,56
                                MTBF         h      50000
                                Warranty Month
Lift/Lock/Park     YES          Certificates



  |                                                        |XX CN6
  |                                                        |XX Power
  |   LED                                                  |
  |  +---+                                                 |XX I
  |  +---+                                                 |XX N
  |                                                        |XX T
  |                                                        |XX E
  |                                                        |XX R
  |                                                        |XX F
  |                                                        |XX A
  |                             6           1              |XX C
  |                             +-----------+              |XX E
  |                             +-SW1-------+              |XX
  |                             +------+                   |
  |                             +-SW2--+                   |XX
  |                             4      1                   |XX Power
  |                                                        |XX CN2



Switches locations

x = Jumpers are set from factory

 SW1  IRQ14/RSVD switch
       1   OFF    After exchange pin 29 = IRQ14
       2   ON                    pin 31 = RESERVED

x 1 ON Normal status pin 29 = RESERVED
x 2 OFF pin 31 = IRQ14

This operation is to exchange settings of pins 29 and 31 to eliminate
crosstalk influence in the host interface cable.

 SW1   Slave present mode/Active mode
       3   ON   Slave present mode
       4   OFF

x 3 OFF Active mode
x 4 ON

This operation is to set the slave present or active mode. This
setting should be set in active mode on daisy-chained connection of
both M2616ET.

       1   OFF  SLAVE side of 2-drive system
       2   ON

x 1 ON MASTER drive
x 2 OFF

 SW2   1-drive/2-drive
       3   ON   2-drive
 x     3   OFF  1-drive

 SW2   Write-protect
       4   ON   Write-protected
 x     4   OFF  Write-enabled

The write protect switch is provided as an option

 SW2   I/O channel ready (IOCHRDY) output
       5   ON   pin 27 = IOCHRDY
 x     5   OFF  pin 27 = RESERVED

When the data transfer rate of the host becomes very high (near 3.7
MW/s or more), the M2616ET must provide wait state to synchronize
data transfer. This setting is used to output IOCHRDY to pin 27 of
the host interface.

 SW2   ECC bytes
       6   ON   4 Byte
 x     6   OFF  7 Byte



Notes on installation

 Installation direction
     horizontally                          vertically
    +---------------+                  +--+                  +--+
    |               |                  |  +-----+      +-----+  |
    |               |                  |  |     |      |     |  |
 +--+---------------+---+              |  |     |      |     |  |
 +----------------------+              |  |     |      |     |  |
                                       |  |     |      |     |  |
      X           X                    |  |     |      |     |  |
 +------X-------X-------+              |  |     |      |     |  |
 +--+-----X---X-----+---+              |  +-----+      +-----+  |
    |      XX       |                  +--+                  +--+
    |    X    X     |
     X            X

If the drive is installed in any of the above three installation
directions, the level deviation must not exceed 5*.

The PCA must be on the bottom!

Ambient temperature
The operating temperature range for the IDD in a cabinet is specified
at a distance of 3 cm from the IDD. Design the air flow in the cabi-
net to keep.

The maximum ambient temperature with in 45* C.

The air circulation in the cabinet must be designed so that the PCA
side of the IDD is particularly cooled.

Multi-drive connection
Up to two IDDs are connectable.

Note: In principle, perfect operation cannot be guaranteed in case
of daisy-chained combination (2-drive-system) of drive and other
manufacturer's drive.

Cable requirements
The cable of twisted pairs and neighboring line separated individu-
ally is not allowed to use for the host interface cable. It is
because that the location of signal lines in these cables is not
fixed, and so the problem on the crosstalk among signal lines may

Cable length: 0.5m Max.

 DC power supply
 DC voltages of +5 V and +12 V are available. The IDD has two types
 of power connectors, the one is big type (4 pins), the other is
 small type (CN6, 3 pins).



Media Defect
When a physical track contains two or more bad sectors, all sectors
in the track are given BAD flags in formatting before the drive is
shipped. As regards media defect, it defines with number of bad
tracks as follows. (provided that CYL0 is defect free)
Number of bad tracks per drive: 24 Max.

Power Save Mode
The drive supports two power modes which are selectable by the POWER
command: idle mode and power save mode. In power save mode, power is
supplied to the disk controller but not to the disk to save power.
(In this state, the spindle keeps on revolving.) This is low power
consumption mode.

Drive BIOS specification
The PC-AT BIOS specification (parameters such as the number of cylin-
ders, the number of heads and the number of sectors/track) is not
always equal to the physical specification of the IDD.
The PC-AT BIOS does not support operation in the full range of the
physical specifications of the IDD. To make the IDD work most effi-
ciently according to its physical specification, the logical specifi-
cations should be converted in the controller.

As BIOS has a limitation of number of cylinders (< 1024), a host can-
not be operated by physical parameters. Therefore, logical/physical
translation (emulation) is needed, a host has to use the drive by
logical parameters. BIOS specifications are defined by "SET PARA-
METERS" command which a host issues. A customer who can modify
"FIXED DISK PARAMETER TABLE" in the BIOS selects parameter freely
and can set BIOS specification. However, the parameter must be se-
lected WITHIN THE STORAGE CAPACITY which the drive has. And it is
possible that customer uses the drive by selecting appropriate DRIVE
TYPE in the BIOS. In this case, the drive works in the storage ca-
pacity which customers selected. Logical parameter which can use
without loss of physical capacity of the drive:

                               Physical Logical
           Number of cylinders|  1542  |  771  |
           Number of heads    |     4  |    8  |
           Sectors/track      |    33  |   33  |

When the drive is operated by TEST PROGRAM (Bench Mark Test etc.)
which is for measurement of the performance of the HDD, according
to BIOS specifications, actual performance may not be measured. For
example, in BIOS specification

           Number of cylinders| 771  |
           Number of heads    |  12  |
           Sectors/track      |  17  |
           Total capacity     | 104MB|

Track to track seek becomes 2 position seek. In the drive, example of
BIOS specification that actual performance can measure and loss ca-
pacity least is shown following. However, the result of Bench Mark
Test etc. and the performance of the actual use are not always equal.
BIOS specification needs to decide that result of file access depen-
ding on systems is evaluated synthetic.

Even when receiving a non-1:1 interleaving table from the host, the
IDD internally performs 1:1 formatting. This is because:

   interleaving is nit required as the look-ahead-cache function
   performs high speed data transfer at a place where hitting is made.

   interleaving is substantially unnecessary since formatting (e.g.
   17 sectors/track) is performed on two consective heads or cylinders



Tips & Hints about ICP controllers and other peripherals

Tagged queues and Fujitsu M 26xx harddisks
Fujitsu Harddisks of the M26XX series do not support the SCSI-II
feature tagged queues. You should disable this feature in the
initialize disks menue of the GDTSetup program. An inquiry command
shows, that the harddisk supports tagged queues (this is why you can
enable it in the GDTSetup) but this is not true as stated by Fujitsu

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