1. This diagnostic tool is available for use by customers who feel their Fujitsu Branded Toshiba SCSI hard drive may not be operating normally. It is only designed for use with Fujitsu Branded Toshiba SCSI hard drives. There are 3 test modes: Quick Test 1 to 3 minutes, a basic operational test. Standard Test 20 to 25 minutes, also performs Read.
  2. Japanese IT manufacturer Fujitsu has released a tool for Windows users to check on the health of their IDE and ATA hard disk drives. Fujitsu Windows Diagnostic Tool runs two types of analyses: quick, which is based in random reading/writing tests, and completes itself in three minutes, and exhaustive, which analyzes the surface of the device and will complete in 30 to 100 minutes.
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FUJITSU M2691/2692/2693/2694-ES/ESA/ESB/EH/EHA/EHB OEM MAN.41FH5084E-

Jumper Setting

x = Jumper set at factory

The user must set the following terminals and SCSI terminating
resistor before installing the IDD in the system.

- Setting terminal: SW1, CNH10, CNH11, CNH2, CNH3
- SCSI terminating resistor (M269xES only)

SW1 Switch setting

Set starting/stopping the IDD offline self-diagnostics. The offline
self-diagnostics tests the IDD controller functions and the basic
read/write operation of the disk drive. In normal operations, this
setting terminal must be OFF.

Sets the response method against the received command when the IDD
keeps the UNIT ATTENTION condition. This mode is set for system
requirement, however, it is recommended to use the SCSI standard
setting (setting at factory shipment).

Set whethersynchronous mode data transfer request from the TARG is
enabled according to Table. When the synchronous mode data transfer
is enabled, the IDD responds the SYNCHRONOUS DATA TRANSFER REQUEST
message to the INIT that issues the first command after power-on.

1. This setting does not affect asynchronous mode transfer.

Set the display requirements of the LED on the fron panel or external

This setting only determines the operation mode when power is turned
on. Stopping or restarting the spindle motor can be controlled with
the START/STOP UNIT command for both modes.

Note: When the IDD connects to a position other than both ends of the
SCSI cable, do not mount the terminator resistor module on the IDD.


Notes: Set the SCSI ID so that there are no duplicates between SCSI
devices on the same SCSI bus.

The priority of SCSI bus use in ARBITRATION phase is determined by
SCSI ID as follows: 7 > 6 > 5 > 4 > 3 > 2 > 1 > 0

Enabling or disabling write protect function is set by pin 7-8 of the
setting terminal CNH11. By setting this write protect function,
writing into disk medium is inhibited.

CN5 External operator panel connector

CN6 External operator panel connector
When the external operator panel is not connected to CN6, CN6 should
be opened. (default setting: OPEN)
When the external operator panel is connected, pins of CNH11 corres-
ponding to the signals set by the external operator panel should be

CN7 Spindle Sync Connector


FUJITSU M2691/2692/2693/2694-ES/ESA/ESB/EH/EHA/EHB OEM MAN. 41FH5084E

Installation direction

The permissible orientations of the IDD are shown above, and the
tolerance of the angle is 5* from the horizontal plane.

Mounting frame structure
The disk enclosure (DE) of the IDD serves as a signal ground (SG) and
is insulated from the mounting frame (frame ground: FG). As this
insulation is maintained after the IDD is mounted in the system, the
following precautions must be followed.

Generally, SG an FG are connected at one point in the system
enclosure. Therefore, use following procedure to maintain the
insulation when mounting the IDD:

Limitatation of side-mounting: When the drive is mounted using side
screw holes, do not use the center hole. (M3 or #6-32 UNC screws)

External magnetic field
The drive should not be installed near the ferromagnetic body like a
speaker to avoid the influence of the external magnetic field.

Ambient temperature
When the IDD is operating, the ambient temperature measured 3 cm from
the disk enclosure (DE) surface and from the PCA surface must satisfy
the specified requirement. For the DE surface temperature at opera-
ting, the contact temperature at the measurement point must satisfy
the specified requirement.

Noise filter
To eliminate AC line noise, a noise filter should be installed at the
AC input terminal on the IDD power supply unit. The specification of
this noise filter is as follows:

SCSI cable
All SCSI devices on one bus are daisy-chained with an SCSI cable.
A terminating resistor must be mounted in the SCSI device at each end
of the SCSI cable.

Since an SCSI terminating resistor module is mounted in the only IDD
of Single-Ended type SCSI on shipment, it must be removed when the
IDD is not connected at either end of the SCSI cable. Also, a method
for power supply to the terminating resistor must be selected with
the setting terminal on the IDD.

The maximum number of SCSI devices that can be connected to the SCSI
bus is 8, including the host adapter, IDD, and other SCSI equipment.

The connector (socket) for the SCSI cable must be an unshielded 50-
contact socket which has two rows of 25 contacts spaced at 2.54 mm
(0.1 inch) apart. It should also have a key way to prevent insertion
in the wrong direction (bump type connector).

The maximum length of the SCSI cable is as follows. If more than one
SCSI device is connected, the total cable length must not exceed the

The use of a 25-pair twisted cable satisfying the following require-
ments is recommended:

When an SCSI device is connected to the SCSI cable except at either
end of the cable, connection to the SCSI connector must be at a
branchpoint of the cable. If a SCSI device is connected to one end of
the SCSI bus, no cable should be connected after the last SCSI device
except when the cable has a terminating resistor.

Power cable
IDDs must be star-connected to the DC power sypply (one to one con-
nection) to reduce the influence of load variations.

DC ground
A DC ground cable may or may not be installed depending on the
system requirements (system installation environment, cabinet
structure, power supply system). This cable is generally connected
to the ground of the power supply unit. It is recommended to connect
with a daisy chain (one by one connection).

Connector for external operator panel
Two types of connectors for the external operator panel are provided
on the IDD. They allow connection of an external LED on the front
panel, and an SCSI ID setting switch.

SCSI terminating resistor (M269xES only)
The SCSI terminating resistor module is installed in the only IDD
of Single-Ended type SCSI (M269xES) when the IDD is shipped from the
factory. The terminating resistor module is mounted in a socket and
must be processed in one of followings.

When demounting the terminating resistor module, be careful not to
damage the resistor module pins, mount socket and contiguous parts.

When mounting the terminating resistor module, check the mounting
direction and whetherthe module is fixed.

Confirming initial operations

Initial operation in the case of settong so that motor starts at

Remark: The spindle motor may or may not start rotating in this stage

3. Check items at illegal operation

Dismounting drives
Take the drive offline.

Disconnect system power before removing the drive. Do not remove
mounting screws holding the cables and drive while power is on.

Do not move the drive until it completely stops (30 seconds after
spindle motor is stopped with START/STOP UNIT command or after
power is turned off).


FUJITSU M2691/2692/2693/2694-ES/ESA/ESB/EH/EHA/EHB OEM MAN.41FH5084E-

Media defects
The number of allowable media defects are as follows.

Error recovery
The IDD can try to recover from errors in SCSI bus or the disk drive
using its powerful retry processing. If a recoverable data check
occurs, error-free data can be transferred to the initiator after
being corrected in the data buffer. The initiator software is
released from the complicated error recover processing by these error
recovery functions of the IDD.


It is a 8-byte error detection/correction code for the data field.
It is possible to detect single burst errors with length of up to
44 bits or double burst errors with length of up to 10 bits and to
correct single burst errors with lengths of up to 8 bits.

Defect List
Information of the defect location on the disk is managed by the
defect list. The following are defect lists which the IDD manages.

P list (Primary defect list): This list consists of defect location
information available at the disk drive shipment and is recorded in
a system space. The defects in this list are permanent, so that the
INIT must execute the alternate block allocation using this list
when initializing the disk.

D list (Data defect list): This list consits of defect location
information specified in a FORMAT UNIT command by the INIT at the
initialization of the disk. This information is recorded in the
system space of the disk drive as G list. To execute the alternate
block allocation, the FORMAT UNIT command must be specified.

C list (Certification defect list): This list consist of location
information on defective blocks which are detected by the verifying
operation (certification) of the data block after the initiation
when executing the FORMAT UNIT command. The IDD generates this
information when executing the FORMAT UNIT command, and the alternate
block allocation is made upon the defective block. This information
is recorded in the system space of the disk drive as the G list.

G list (Growth defect list): This list consists of defective logical
data block location information specified in a REASSIGN BLOCKS
command by the INIT, information on defective logical data blocks
assigned alternate blocks by means of IDD automatic alternate block
allocation, information specified as the D list, and information
generated as the C list. They are recorded in the system space on the
disk drive.

The INIT can read out the contents of the P and G lists by the

Programmable data block length
Data can be accessed with fixed block length unit. Data block length
is programmable, and can be set to the most suitable length, from
180 to 4,160 bytes with 2-byte boundary at formatting time.

High speed data transfer
The data transfer rate on the SCSI bus is 4MB/s maximum in asynchro-
nous mode and 10MB/s in synchronous mode. Such a high data transfer
rate on the SCSI bus can be useful with the large capacity buffer
in the IDD.

The maximum data transfer rate in asynchronous mode may be limited
by the response time of the initiator and the length of SCSI bus

The maximum data transfer in synchronous mode on the single-ended
SCSI bus may be limited by the cable length and transmission charac-
teristics of the SCSI bus and the connected SCSI device number.

512KB programmable multi-segment data buffer
Data is transfered between SCSI bus and disk media through the em-
bedded 512KB data buffer in the IDD. This buffer can be divided into
maximum 32 areas. This feature provides the suitable usage
environment for users.

Since the initiator can control the disconnect/reconnect timing on
the SCSI bus by specifying the condition of stored data in the data
buffer or empty condition of the data buffer, the initiator can per-
form the effective input/output operations with utilizing high data
transfer capability of the SCSI bus regardless of actual data trans-
fer rate of the disk drive.

Read-Ahead cache feature
After executing the READ command, the IDD reads automatically and
stores (prefetches) the subsequent data blocks into the data buffer
(Read-Ahead caching).

The high speed sequential data access can be achieved by transfering
the data from the data buffer without reaccessing the disk in case
the subsequent command requests the prefetched data blocks.

Command queuing feature
The IDD can queue maximum 128 commands, and optimize the issuing
order of queued commands by the reordering function. This feature
realizes the high speed processing.

SCSI bus configuration
Up to eight SCSI devices can be connected to the SCSI bus, with any
combination of the SCSI devices that operate as initiator and that
operate as target.

Each SCSI device on the bus has its own unique address (SCSI-ID: #n).
For input/output operation, a peripheral device attached to the SCSI
bus that operates as target is addressed in unit called as logical
unit. A unique address (LUN: logical unit number) is assigned for
each logical unit.

The initiator selects one SCSI device by specifying that SCSI ID,
then specifies the LUN to select the peripheral device for input/
output operation.

More Fujitsu SCSI Videos

Mean Time Between Failures (MTBF)
MTBF of the IDD during its life time is 300.000 hours.

Failure of the equipment means failure that requires repair, adjust-
ments or replacement. Mishandling by the operator, failures due to
bad environmental conditions, power trouble, host system trouble,
cable failures, or other failures not caused by the equipment are not

Mean Time To Repair (MTTR)
MTTR is the average time taken by a well-trined service mechanic to
diagnose and repair a drive malfunction. The drive is designed for a
MTTR of 30 minutes or less.

Service life
Overhaul of the drive is not required for following period which ever
earlier if handled correctly.

Fujitsu United States

Data security at power failure
Integrity of the data on the disk is guaranteed against all forms of
DC power failure except on blocks where a write operation was being
performed. The above does not applied to formatting disks or assign-
ing alternate blocks.

Failure of the intelligent disk drives is defined as a failure
requiring adjustments, repairs or replacement. Fujitsu is not
responsible for drive failures caused by misuse by the user, poor
environmental conditions, power trouble, host problems, cable fai-
lures, or any failures not caused by the drive itself.

Track format configuration example



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

Scsi Scanner Device