Memtech SC2500 User Manual

SC2500 Stinger

2.5” Solid State SCSI Drive

User Guide

153866-001

Revision 2.1

May 6, 2003

Memtech SSD Corporation

7628 Las Positas Road

Livermore, CA 94550

[phone]

www.memtech.com

SC2500 User Guide Ver 2.1 May 6, 2003 Page 2 of 26

Table Of Contents

1. HIGHLIGHTS 3

2. INTRODUCTION 3

3. GENERAL DESCRIPTION 4

3.1 SCSI Interface 4

3.2 SCSI Connector 5

3.3 SCSI Commands 6

4. GENERAL SPECIFICATIONS 19

5. INSTALLATION 20

5.1 Default Configuration 20

5.2 Hardware Installation Procedure 20

5.3 Power and Cable Attachments 21

5.4 Software Installation Procedure 21

6. JUMPER CONFIGURATION 22

6.1 Switch Locations 22

6.2 Default Jumper Configuration 23

6.3 SCSI ID Selection 23

6.4 Write Protection 23

6.5 Termination 23

6.6 SCSI ID Source Selection 24

6.7 Other Jumper Definitions 24

6.8 Memory Size 24

7. TROUBLE SHOOTING GUIDE 24

7.1 Error Blink Codes - 24

7.2 Warning Blink Codes – 24

7.3 Unit does not respond to SCSI commands - 25

8. APPENDIX 26

8.1 Contact Information 26

8.2 SCSI specification information 26

8.3 Limited Lifetime Warranty 26

SC2500 User Guide Ver 2.1 May 6, 2003 Page 3 of 26

1. HIGHLIGHTS

• 9 Gbyte uncompressed capacity

• Full -40

o

C to +85oC operating temp range

• Active Remap™ Wear Leveling Technology

• Unmatched SCSI-II compatibility

• On-board active termination

• 5 volt, low power operation

• Completely solid state - no moving parts

• 1000G operating shock

• 50G operating vibration

• Rugged, 2.5 low-profile form factor

• Single-ended 50 pin SCSI interface

• 0.3 millisecond random access time

• 10 Mbyte/sec media transfer rate

• 10 Mbyte/sec interface transfer rate

• 10 year guaranteed data integrity

• NO installable device drivers

2. INTRODUCTION

The SC2500 series is a line of 100% compatible SCSI-II solid state drives
in a 2.5-inch half-height format. It is completely solid state, with no moving
parts. This accounts for the unit’s exceptional ruggedness and wide
operating temperature range.

Sector Erasable NAND E

2

PROM (Flash) are used to provide up to 9 Gbytes
of nonvolatile, solid state storage in an extremely small, rugged form factor.
The drive is 100% SCSI compatible and requires no special drivers to
operate. It is essentially a drop in replacement for standard rotating media.

The SC2500 can be used in applications where operating conditions are
harsh and when reliability is critical. A 100% CMOS logic design minimizes
power consumption, and the +5 volt only power requirement simplifies
system supply needs, as +12 volts is not necessary. An on-board
microprocessor implements all control functions, and oversees SCSI
communications via a QLogic FAS209 SCSI-II processor. The
microprocessor performs all power up diagnostics, data transfers, and error
handling in the unit. The SC2500 can sustain a 7.0 Mbyte per second read
throughput and 1.5 Mbyte per second write throughput. The unit responds
to all Direct-Access device commands, and as with all single-ended SCSI
units, the SC2500 may be placed up to 18 feet (6 m) from the host SCSI
controller. Data integrity is maintained using Memtech’s proprietary Active
Remap™ technology.

The drive is available in capacities ranging from 128 Mbytes to 9 Gbytes.
Please contact the factory with your requirements. Disk compression
utilities may be used to effectively double the usable capacity of the drive.
Every drive is fully tested under environmental extremes, which guarantees
data integrity under even the harshest conditions.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 4 of 26

3. GENERAL DESCRIPTION

3.1 SCSI Interface

An intelligent SCSI controller from QLogic, the FAS209, handles the SCSI
interface for the SC2500. The FAS209 is SCSI-I and SCSI II compliant, and
automates much of the interface overhead. It has a 16 byte FIFO, a DMA
interface, and numerous command and control registers.

The SC2500 employs the following attributes:

1. Single-ended drivers

2. Termination power derived from cable or drive

3. Parity on the interface

4. "Hard" RESET implemented

5. No reservation queuing

The SC2500 has implemented all mandatory SCSI-I and SCSI- II commands
and several optional commands to enhance functionality. The following is a
list of commands and their equivalent hexadecimal representation.

1. Test Unit Ready 00h M

2. Rezero Unit 01h O

3. Request Sense 03h M

4. Format Unit 04h M

5. Read 08h M

6. Write 0Ah O

7. Inquiry 12h M

8. Reserve Unit 16h M

9. Release Unit 17h M

10. Mode Sense 1Ah O

11. Send Diagnostics 1Dh M

12. Read Capacity 25h M

13. Extended Read 28h M

14. Extended Write 2Ah O

15. Erase 2Ch O

16. Verify 2Fh O

Notes: O = Optional M = Mandatory

The implemented messages on the SC2500 are as follows:

1. Command Complete 00h Generated

2. Extended Message 01h Both

3. Init Detected Error 05h Received

4. Abort 06h Received

5. Message Reject 07h Generated

6. NoOp Message 08h Received

7. Message Parity Error 09h Received

8. Bus Device Reset 0Ch Received

9. Identify 80h Received

SC2500 User Guide Ver 2.1 May 6, 2003 Page 5 of 26

3.2 SCSI Connector

The SC2500 uses a 50-pin right angle 2mm center connector mounted
on the PCB to create both a power and signal connection to the host.
Maximum cable length is 6 meters. The diagram below depicts
connector orientation and location.

3.2.1 SCSI Connector Physical Orientation

Pin #1
Pin #41

Pin #42

Pin #17

SC2500 User Guide Ver 2.1 May 6, 2003 Page 6 of 26

3.2.2 SCSI Connector Pinout

The following shows the pin connections for the SCSI connector used on the
SC2500.

PIN SIGNAL PIN SIGNAL

1 +5 Volt Power 2 +5 Volt Power
3 GROUND 4 GROUND
5 GROUND 6 -DB0
7 GROUND 8 -DB1

9 GROUND 10 -DB2
11 GROUND 12 -DB3
13 GROUND 14 -DB4
15 GROUND 16 -DB5
17 KEY 18 -DB6
19 GROUND 20 -DB7
21 GROUND 22 -DBP
23 GROUND 24 TERMPWR
25 -ATN 26 -BSY
27 GROUND 28 -ACK
29 -RST 30 -MSG
31 GROUND 32 -SEL
33 -IO 34 -C/D
35 GROUND 36 -REQ
37 GROUND 38 GROUND
39 +5 Volt Power 40 +5 Volt Power
41 RSVD 42 RSVD
43 RSVD 44 RSVD
45 ID1 46 ID2
47 ID3 48 -LED
49 NC 50 NC

3.3 SCSI Commands

3.3.1 Test Unit Ready Command – 00h

Test Unit Ready CDB

The TEST UNIT READY command provides a means to check if the logical unit
is ready. This is not a request for a self-test. If the logical unit would accept an

SC2500 User Guide Ver 2.1 May 6, 2003 Page 7 of 26

appropriate medium-access command without returning CHECK CONDITION
status, this command shall return a GOOD status. If the logical unit cannot
become operational or is in a state such that an initiator action is required to
make the unit ready, the target shall return CHECK CONDITION status with a
sense key of NOT READY.

3.3.2 Rezero Unit Command – 01h

Rezero Unit CDB

The REZERO UNIT command requests that the target set the logical unit to a
specific state. This is implemented on the SC2500 as a NOP command and has
no effect other than to verify the CDB.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 8 of 26

3.3.3 Request Sense Command – 03h

Request Sense CDB

The REQUEST SENSE command requests that the SC2500 transfer sense data
to the initiator. If the SC2500 has no sense data available to return, it will return
a sense key of NO SENSE and an additional sense code of NO ADDITIONAL
SENSE INFORMATION. The sense data shall be preserved by the target for the
initiator until retrieved by a REQUEST SENSE command or until the receipt of
any other I/O process for the same I_T_x nexus. Sense data shall be cleared
upon receipt of any subsequent I/O process (including REQUEST SENSE) to
the same I_T_x nexus.

The target shall return CHECK CONDITION status for a REQUEST SENSE
command only to report exception conditions specific to the command itself. For
example:

a) A non-zero reserved bit is detected in the command descriptor
block;
b) An unrecovered parity error is detected on the data bus;
c) A target malfunction prevents return of the sense data.

If a recovered error occurs during the execution of the REQUEST SENSE
command, the target shall return the sense data with GOOD status. If a target
returns CHECK CONDITION status for a REQUEST SENSE command, the
sense data may be invalid.

The SC2500 is capable of returning eighteen bytes of data in response to a
REQUEST SENSE command. If the allocation length is eighteen or greater, and
the SC2500 returns less than eighteen bytes of data, the initiator should assume
that the bytes not transferred would have been zeros had the target returned
those bytes. Initiators can determine how much sense data was returned by
examining the allocation length parameter in the command descriptor block and
the additional sense length in the sense data.

The sense data format for error codes 70h (current errors) and 71h (deferred
errors) are defined below. For further details on the Request Sense command,
please refer to the SCSI specification.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 9 of 26

Sense data format

SC2500 User Guide Ver 2.1 May 6, 2003 Page 10 of 26

3.3.4 Format Unit Command – 04h

The FORMAT UNIT command formats the medium into initiator addressable
logical blocks per the initiator-defined options. In addition, the medium may be
certified and control structures may be created for the management of the
medium and defects.

Format Unit CDB

Only the simplest and mandatory forms of the FORMAT UNIT command (with no
format data) are implemented on the SC2500. This routine accomplishes
medium formatting with little initiator control over defect management.

The FORMAT UNIT command shall be rejected with RESERVATION
CONFLICT status if the logical unit is reserved, or any extent reservation, from
any initiator, is active in the specified logical unit. During the execution of the
FORMAT UNIT command, the SC2500 may perform a medium defect
management algorithm.

A FmtData bit of zero indicates that a DATA OUT phase shall not occur. The
source of defect information is not specified. This is the only form of the
command the SC2500 supports.

A complete list (CmpLst) bit of one indicates that the defect list sent by the
initiator is a complete list of defects. The existing defect list is discarded by the
SC2500 and a new primary defect list is constructed. A CmpLst bit of zero
indicates that the current defect list should be maintained. As a result a new
primary is constructed that contains the existing list and any new defects the
SC2500 may add during the format operation.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 11 of 26

3.3.5 Read (6) Command – 08h

The READ (6) command requests that the SC2500 transfer data to the initiator.
The most recent data value written in the addressed logical block shall be
returned.

Read (6) CDB

The logical block address field specifies the logical block at which the read
operation shall begin. The transfer length field specifies the number of
contiguous logical blocks of data to be transferred. A transfer length of zero
indicates that 256 logical blocks shall be transferred. Any other value indicates
the number of logical blocks that shall be transferred.

3.3.6 Write (6) Command – 0Ah

The WRITE (6) command requests that the target write the data transferred by
the initiator to the medium.

Write (6) CDB

The logical block address field specifies the logical block at which the write
operation shall begin.

The transfer length field specifies the number of contiguous logical blocks of
data to transfer. A transfer length of zero indicates that 256 logical blocks shall
be transferred. Any other value indicates the number of logical blocks that shall
be transferred.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 12 of 26

3.3.7 Inquiry Command – 12h

The INQUIRY command requests that information regarding parameters of the
SC2500 be sent to the initiator.

Inquiry CDB

An enable vital product data (EVPD) bit of one specifies that the SC2500 return
the optional vital product data specified by the page code field. If any optional
fields in the CDB are set that the SC2500 does not support, it will return a
CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and
an additional sense code of INVALID FIELD IN CDB.

An EVPD bit of zero specifies that the SC2500 return the standard INQUIRY
data. If the page code field is not zero, the target shall return CHECK
CONDITION status with the sense key set to ILLEGAL REQUEST and an
additional sense code of INVALID FIELD IN CDB. The page code field specifies
which page of vital product data information the SC2500 return.

The INQUIRY command shall return CHECK CONDITION status only when the
target cannot return the requested INQUIRY data. The INQUIRY data should be
returned even though the peripheral device may not be ready for other
commands. If an INQUIRY command is received from an initiator with a
pending unit attention condition, the SC2500 will perform the INQUIRY
command and not clear the unit attention condition.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 13 of 26

Standard Inquiry Data Format

Please refer to the SCSI specification for further details on the vital product data
pages and formats.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 14 of 26

3.3.8 Reserve Unit – 16h

The RESERVE command is used to reserve a logical unit or, if the extent
reservation option is implemented, extents within a logical unit.

Reserve CDB

3.3.9 Release Unit – 17h

The RELEASE command is used to release a previously reserved logical unit,
or, if the extent release option is implemented, to release previously reserved
extents within a logical unit.

Release CDB

SC2500 User Guide Ver 2.1 May 6, 2003 Page 15 of 26

3.3.10 Mode Sense

The MODE SENSE (6) command provides a means for a target to report
parameters to the initiator. It is a complementary command to the MODE
SELECT (6) command.

Mode Sense CDB

A disable block descriptors (DBD) bit of zero indicates that the target may return
zero or more block descriptors in the returned MODE SENSE data, at the
target’s discretion. A DBD bit of one specifies that the target shall not return any
block descriptors in the returned MODE SENSE data. The page control (PC)
field defines the type of mode parameter values to be returned in the mode
pages. The page code specifies which mode page to return.

3.3.11 Send Diagnostics – 1Dh

The SEND DIAGNOSTIC command requests that the SC2500 perform
diagnostic operations on itself. The only mandatory implementation of this
command is the self-test feature with the parameter list length of zero.

Send Diagnostics CDB

SC2500 User Guide Ver 2.1 May 6, 2003 Page 16 of 26

3.3.12 Read Capacity – 25h

The READ CAPACITY command provides a means for the initiator to request
information regarding the capacity of the logical unit.

Read Capacity CDB

3.3.13 Extended Read (10) – 28h

The READ (10) command requests that the target transfer data to the initiator.
The most recent data value written in the addressed logical block is returned.

Read (10) CDB

SC2500 User Guide Ver 2.1 May 6, 2003 Page 17 of 26

3.3.14 Extended Write (10)

The WRITE (10) command requests that the SC2500 write the data transferred
by the initiator to the medium.

Write (10) CDB

SC2500 User Guide Ver 2.1 May 6, 2003 Page 18 of 26

3.3.15 Erase Command

Erase CDB

The ERASE (10) command requests that the target erase the specified number
of blocks starting at the specified logical block address on the medium. As used
here, erased means the medium shall be erased. The previous data recorded
on the medium, if any, shall not be recoverable. The Remap Table is retained,
thus allowing write and read access to the memory.

The erase all (ERA) bit set to one indicates that all blocks on the medium shall
be erased. If the ERA bit is set to one and if the number of blocks is not zero, the
SC2500 will return CHECK CONDITION, and the sense key shall be set to
ILLEGAL REQUEST, with an additional sense code of INVALID FIELD IN CDB.
If the ERA bit is zero a transfer length of zero indicates that no blocks shall be
erased. This condition is not considered an error and no data is erased. Any
other value indicates the number of logical blocks that shall be erased.

A note about the Erase Command –

The erase command has been implemented as a security erase mechanism on
the SC2500. When executed with ERA set, a 768 Mbyte drive can be wiped
clean in under 10 seconds. All storage locations on the drive are erased,
including both user and system (protected) data areas. At the conclusion of the
erase command, the existing Remap Table™ is restored to memory. If you wish
to wipe the Remap Table™ information as well, please contact the factory for
implementation instructions.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 19 of 26

4. GENERAL SPECIFICATIONS

Interface

SCSI Compatibility ANSI X3.131-1994
SCSI Device Type 0 - Direct Access Device
Maximum Capacity 9 Gbytes
Bytes/Block 512
Bus Width 8 bits
Termination Active – on board

Data Transfer Specifications
Bus width 1 byte (8 bits)
Read Transfer Rate 7.0 Mbyte/sec., sustained
Write Transfer Rate 1.5 Mbytes/sec sustained
Data Access time 0.3 msec

Environmental Requirements
Operating Ambient Temperature
Commercial 0

o

C to +70oC

Extended -20

o

C to +75oC

Industrial -40

o

C to +85 oC

Storage Temperature -55

o

C to +125oC Ambient
Humidity 5% to 95% non-condensing
Airflow Requirements none
Ceiling no limit

Mechanical (Full Capacity)
Length 100mm (3.96 in.)
Width xxmm (2.75 in.)
Max Height 12.7mm (0.50 in.)
Drive Form Factor 2.5" low-profile
Mounting Considerations None (any orientation)
Max Weight

Power Requirements
Vcc Supply +5.00 volts +/- 5%
Vdd Supply Not Used
Power Idle 0.50 watts
Power Active 1.00 watts
Power Max 1.25 watts

SC2500 User Guide Ver 2.1 May 6, 2003 Page 20 of 26

5. INSTALLATION

5.1 Default Configuration

Refer to section 6 for detailed jumper configuration information. The default
jumper switch configuration is given in the table below. Always power down
the unit before changing the SCSI ID or write protect switches. Changing
these settings with power applied may result in the changes not being
recognized.

DEFAULT JUMPER SWITCH CONFIGURATION

# Definition State Switches

a. SCSI ID Device 0
ID0 – OFF Switch pos. 1 OFF
ID1 - OFF Switch pos. 2 OFF
ID2 - OFF Switch pos. 3 OFF
b. Termination Disabled Switch pos. 4 OFF
c. Term Power Cable Switch pos. 5 OFF
d. Writes Enabled Switch pos. 6 OFF
e. SCSI ID Source Connector Switch pos. 8 ON

5.2 Hardware Installation Procedure

5.2.1 Verify that the drive is configured as required by the application. Many
SCSI controllers require that the system disk be addressed as device 0 or 1 on
the SCSI bus. If a different ID is required, refer to section 6 for proper switch
settings.

5.2.2 Power off the computer system by throwing the main power switch.

5.2.3 Disconnect the AC power cord from the computer system.

5.2.4 Open the system to allow access to the drive bays and the card slots as
required.

5.2.5 If a SCSI initiator is not already installed in the system or on the
motherboard, then install that card.

5.2.6 Install the SC2500 into a standard 3 1/2" drive bay, or using adapter
hardware, place the unit into a 5 1/4" drive bay. Any mounting orientation is
acceptable.

5.2.7 Attach the 50-pin flat ribbon connector from the SCSI initiator to the
SC2500. If multiple devices are to be attached to the SCSI bus, then remove any
terminating resistors or disable active termination on those units not at the END
of the cable. Only the two devices at the ends of the SCSI bus should have
termination enabled. Failure to comply with this requirement may cause
erroneous operation of the SCSI bus.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 21 of 26

Pin #1
Pin #41

Pin #42

Pin #17

5.2.8 Make sure that pin one on the cable, on the SCSI controller and on the
SC2500 are correctly aligned. The SC2500 uses a square pad on the connector
to indicate pin one, and most cables are marked with a triangle on the connector
or a stripe on the cable itself to indicate the first pin.

5.2.9 Attach the power cable from the system power supply to the SC2500.
This cable is keyed and cannot be inserted backwards. At this point, installation
is complete.

5.2.10 Reattach the AC power cable to the system and power-up.

5.3 Power and Cable Attachments

The following diagram depicts the SC2500 as viewed from the connector
(Back View).

Back view of SC2500

5.4 Software Installation Procedure

With the SC2500 installed, the user can now treat the device as a standard
Direct Access SCSI device. Standard implementation of the SC2500 will
include building a partition table with FDISK and high-level formatting. Low
level formatting is not required, nor recommended. Refer to your system
documentation for detailed instructions.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 22 of 26

6. JUMPER CONFIGURATION

6.1 Switch Locations

The following diagram shows the unit as viewed from the bottom, and
shows the relative location of the switches and jumpers as described in the
text below.

LED
CR2

WP

ID2
ID1
ID0

TP
TD

Opt2
Opt1

SW1

ON OFF

SCSI Interface

Figure 2: Bottom view of SC2500

SC2500 User Guide Ver 2.1 May 6, 2003 Page 23 of 26

6.2 Default Jumper Configuration

Definition State Switches

a. SCSI ID Device 0
ID0 – OFF Switch pos. 1 OFF
ID1 - OFF Switch pos. 2 OFF
ID2 - OFF Switch pos. 3 OFF
b. Termination Disabled Switch pos. 4 OFF
c. Term Power Cable Switch pos. 5 OFF
d. Writes Enabled Switch pos. 6 OFF
e. SCSI ID Source Connector Switch pos. 8 ON

6.3 SCSI ID Selection

6.3.1 The SC2500 can use any of the 8 SCSI IDs available on the SCSI bus,
although the highest priority device, SCSI ID 7, is usually reserved for the
initiator. Switch selection for each SCSI ID is shown below. To use the main
interface connector for ID setting, the jumper SW1-8 must be on. To use the
switch block, SW1-8 must be off.

ID2 or SW2

ID1 or SW2 ID0 or SW1 SCSI ID SELECTED

ON ON ON SCSI ID 7
ON ON OFF SCSI ID 6
ON OFF ON SCSI ID 5

ON OFF OFF SCSI ID 4
OFF ON ON SCSI ID 3
OFF ON OFF SCSI ID 2
OFF OFF ON SCSI ID 1
OFF OFF OFF SCSI ID 0

6.4 Write Protection

The WP switch of jumper is used to write protect the SC2500. When the
host processor sends a write command, the condition of this switch is
checked. If switch SW1-6 is on, writes are disabled, and an error message
will be returned to the SCSI controller. Moving the switch to the off position
will enable writes on the board, allowing full read/write access to the
memory array.

6.5 Termination

Memtech’s SC2500 employs active termination on the SCSI drive.
Termination is normally disabled on the drive. To enable termination, move
SW1-4 to the ON position. To supply power to the Termination Power line
on the SCSI cable, move SW1-5 to the ON position. Power is sourced to
the SCSI cable through a Schottky diode. Normally, power is supplied to
the drive from the cable and the host adapter.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 24 of 26

6.6 SCSI ID Source Selection

There are two sources for the SCSI ID. To use the switch to select the
SCSI ID, option jumper 2 (SW1-8) should be set to the OFF position. To
use the ID selection pins on the main interface connector, set SW1-8 to the
ON (default) position.

6.7 Other Jumper Definitions

The option 1 jumper at SW1-7 is used during initial testing at the factory
and should NOT be set to the ON position during normal operation.

6.8 Memory Size

Memory size is determined when the SC2500 is built and preformatted at
the factory. With some SCSI adapter cards the memory size is displayed
when the BIOS message is returned at power up. If that memory size
changes, contact Memtech factory repair. Memory capacity can only be
upgraded at the factory.

7. TROUBLE SHOOTING GUIDE

The following is a list of possible error indicators or messages, what they
indicate, and possible solutions to the source problem. If no solution is found,
contact the factory for further assistance.

7.1 Error Blink Codes -

If the LED issues a repeating blink code (accompanied by the drive not
responding to SCSI commands), this indicates a hard error condition as listed
in the table below. Contact the Memtech factory for repair service.

Number of Blinks Error

2 ROM Firmware Checksum error
3 ASIC initialization error
4 SRAM Test failed
5 Remap Table error
6 SCSI controller error
7 Flash/Data Path error

7.2 Warning Blink Codes –

The LED is also used to indicate a number of warning conditions. If a
warning condition is encountered, the LED will issue the number of blinks
indicated below a single time, then continue the normal power-up
procedure. Please note that the warning condition is also entered after
each SCSI reset, so the blink code may be issued several times during
power-up at irregular intervals. Again, contact the Memtech factory for
service or repair.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 25 of 26

Number of Blinks Error

1 No Flash memory detected
2 Invalid Remap Table – drive automatically write

protected

3 Remap Table disabled (SW1-7 ON)

7.3 Unit does not respond to SCSI commands -

If the unit passes power-up diagnostics, but does not respond to SCSI
commands, there may be a SCSI ID contention among the SCSI bus units.
Make sure that every SCSI ID used on the bus is different. See section 5 to
find out how to change the SCSI ID of the unit.

SC2500 User Guide Ver 2.1 May 6, 2003 Page 26 of 26

8. Appendix

8.1 Contact Information

For Technical Support or Warranty Repair information, please contact
Memtech at:

7628 Las Positas Road
Livermore, CA 94550 U.S.A.
Phone: [phone]
Fax: [phone]
Email: [e-mail]

8.2 SCSI specification information

Information regarding the SCSI-II specification may be obtained from
the following locations:

Global Engineering
15 Inverness Way East
Englewood, Co. 80112-5704
Phone: [phone] or [phone]
Fax: [phone]

8.3 Limited Lifetime Warranty

Memtech SSD Corporation (Memtech) warrants your SC2500 against
defects in material and workmanship for the life of the drive. The
warranty is void in the case of misuse, accident, alteration, improper
installation, misapplication or the result of unauthorized service or
repair.

The implied warranties of merchantability and fitness for a particular
purpose, and all other warranties, expressed or implied, except as set
forth in this warranty, shall not apply to the products delivered.

In no event shall Memtech be liable for any lost profits, lost savings or
other incidental or consequential damages arising out of the use of, or
inability to use, this product.

BEFORE RETURNING PRODUCT, A RETURN MATERIAL
AUTHORIZATION (RMA) MUST BE OBTAINED FROM MEMTECH.

Product shall be returned to Memtech with shipping prepaid. If the
product fails to conform and warranty repair is necessary, Memtech
will reimburse customer for the transportation charges incurred.