Memtech SC3500 User Manual

SC3500

3.5” Solid State SCSI Drive

User Guide

80-03-00032
Revision 1.3

March 8, 2005

Memtech SSD Corporation

7628 Las Positas Road

Livermore, CA 94551

[phone]

www.memtech.com

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 .........................................................................7

4. GENERAL SPECIFICATIONS .........................................19

5. JUMPER CONFIGURATION............................................20

5.1 Jumper and Switch Locations....................................................20

5.2 SCSI ID Selection ......................................................................21

5.3 Write Protection .........................................................................21

5.4 Termination................................................................................21

5.5 Termination Power.....................................................................22

5.6 Parity..........................................................................................22

5.7 Remote LED...............................................................................22

5.8 Reserved locations.....................................................................22

5.9 Memory Size..............................................................................22

6. INSTALLATION ...............................................................23

6.1 Default Configuration .................................................................23

6.2 Hardware Installation Procedure................................................23

6.3 Power and Cable Attachments...................................................24

6.4 Software Installation Procedure.................................................24

7. MECHANI CAL DRAWINGS..............................................25

8. TROUBLE SHOOTING GUIDE........................................27

8.1 Error Blink Codes -.....................................................................27

8.2 Warning Blink Codes –...............................................................27

8.3 Red LED on steady at power-up-...............................................27

8.4 Unit does not respond to SCSI commands -..............................27

9. APPENDIX.......................................................................28

9.1 Contact Information....................................................................28

9.2 SCSI specification information ...................................................28

9.3 Limited Lifetime Wa rranty ..........................................................28

SC3500 User Guide Ver 1.3 March 8, 2005 Page 2 of 28

1. HIGHLIGHTS

• 36864 Mbyte uncompressed capacity

• Full -40

o

C to +85oC operating temp range

• Active Remap™ Technology with ECC

• Unmatched SCSI-II compat ibility

• On-board active termination

• 5 volt, low power operation

• Completely solid state - no moving parts

• 500G operating shock

• 10G operating vibration

• Rugged, 3.5” half height drive form factor

• Single-ended 50-pin shrouded SCSI interface

• 0.7 millisecond random access time

• 2.3 Mbyte/sec sustained Read throughput

• 1.0 Mbyte/sec sustained Write throughput

• 10 year guaranteed data integrit y

• NO installable device drivers

2. INTRODUCTION

The SC3500 series is a line of 100% compatible SCSI-II solid state drives in a 3.5­inch half-height format. It is completely solid state, with no moving parts. This
accounts for the unit’s exceptional rugg edness and wide operating temperature
range.

Sector Erasable NAND E
nonvolatile, solid state storage in an extremely small, r ugged form factor. The drive
is 100% SCSI-2 compatible direct access device and requires no special drivers t o
operate. It is essentially a drop in replacement for standard rotating media.

The SC3500 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. An on-board microprocessor implements all cont r ol 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
SC3500 can sustain a 2.3 Mbyte per second read throughput and 1.0 Mbyte per
second write throughput. The unit re sponds t o all Dir ect-Access device commands,
uses a single-ended, unitized 50-pin interface and as with all sing le- ended SCSI
devices, the SC3500 may be placed up to 18 feet (6 m) from the host SCSI
controller. Data integr it y is maint ained using Memtech’s proprietary Active Remap™
technology.

The drive is available in capacities ranging from 128 Mbytes to 36864 Mbytes.
Please contact the factory with your requirem ent s. Every drive is fully tested under
environmental extremes using Memtech’s Enduro Test, which guarantees data
integrity under even the harshest conditions.

2

PROM (Flash) are used to provide up to 36864 Mbytes of

SC3500 User Guide Ver 1.3 March 8, 2005 Page 3 of 28

3. GENERAL DESCRIPTION

3.1 SCSI Interface

An intelligent SCSI controller from Qlogic, the FAS209, handles the SCSI interf ace
for the SC3500. 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 SC3500 employs the following attributes:

1. Single-ended drivers

2. Termination power derived from cable or drive

3. Selectable parity on the interface

4. "Hard" RESET implemented

5. Reservation queuing
The SC3500 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. Mode Select 15h O

9. Reserve Unit 16h M

10. Release Unit 17h M

11. Mode Sense 1Ah O

12. Receive Diagnostics 1Ch O

13. Send Diagnostics 1Dh M

14. Read Capacity 25h M

15. Extended Read 28h M

16. Extended Write 2Ah O

17. Erase 2Ch O

18. Write & Verify 2Eh O

19. Verify 2Fh O

20. Read Defect 27h O

21. Write Buffer 3Bh O

22. Read Buffer 3Ch O

23. Change Definition 40h O

SC3500 User Guide Ver 1.3 March 8, 2005 Page 4 of 28

The implemented messages on the SC3500 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 Receiv ed

9. Identify 80h Received

3.2 SCSI Connector

The SC3500 uses a unitized SCSI-2 connector incorporating bot h the 50-pin right
angle 0.1 inch center connector and the 4-pin AT power connector. Maximum cable
length is 6 meters. The diagram below depicts connector orientation and location.

3.2.1 SCSI Connector Physical Orientation

SC3500 – Connector View

Fig. 1: SC3500 SCSI connector view

Pin #1

+5V

GND

SC3500 User Guide Ver 1.3 March 8, 2005 Page 5 of 28

3.2.2 SCSi Connector Pinout

The following shows the pin connections for the SCSI connect or used on the SC3500.

PIN SIGNAL PIN SIGNAL

1 GROUND 2 DB0
3 GROUND 4 DB1
5 GROUND 6 DB2
7 GROUND 8 DB3

9 GROUND 10 DB4
11 GROUND 12 DB5
13 GROUND 14 DB6
15 GROUND 16 DB7
17 GROUND 18 DBP
19 GROUND 20 GROUND
21 GROUND 22 GROUND
23 RSVD 24 RSVD
25 GROUND 26 TERMPWR
27 RSVD 28 RSVD
29 GROUND 30 GROUND
31 GROUND 32 ATN
33 GROUND 34 GROUND
35 GROUND 36 BSY
37 GROUND 38 ACK
39 GROUND 40 RST
41 GROUND 42 MSG
43 GROUND 44 SEL
45 GROUND 46 C/D
47 GROUND 48 REQ
49 GROUND 50 I/O

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3.3 SCSI Commands

3.3.1 Test Unit Ready Command – 00h

Test Unit Ready CDB
The TEST UNIT READY comm and provides a means to check if the logical unit is

ready. This is not a request f or a self-test. If the logical unit would accept an appropriat e
medium-access command without returning CHECK CO NDI TION 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 requir ed 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 t o a specific

state. This is implemented on the SC3500 as a NO P com mand and has no effect other
than to verify the CDB.

SC3500 User Guide Ver 1.3 March 8, 2005 Page 7 of 28

3.3.3 Request Sense Command – 03h

Request Sense CDB
The REQUEST SENSE command request s t hat the SC3500 transfer sense data to the

initiator. If t he SC3500 has no sense dat a available to r eturn, 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 tar get 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 ret urn CHECK CONDITION status for a REQUEST SENSE com mand
only to report exception conditions specific to the comm and itself. For example:

a) A non-zero reserved bit is detected in the command descript or block;
b) An unrecovered parity error is detected on the data bus;
c) A target malfunct ion pr events return of the sense data.

If a recovered error occurs dur ing 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 SC3500 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 SC3500
returns less than eighteen bytes of dat a, the initiator should assume that the bytes not
transferred would have been zeros had the target ret ur ned 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.

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Sense data format

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3.3.4 Format Unit Command – 04h

The FORMAT UNIT command f ormats 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 f or t he management of the medium and defects.

Format Unit CDB
Only the simplest and mandatory form s of the FORMAT UNIT command (with no format

data) are implemented on the SC3500. T his r outine accomplishes medium formatting
with little initiator control over defect m anagement.

The FORMAT UNIT command shall be rej ected with RESERVATION CONFLICT status
if the logical unit is reserved, or any extent r eser vation, from any initiator, is active in the
specified logical unit. During t he execution of the FORMAT UNIT command, the
SC3500 may perform a medium def ect management algorithm.

A FmtData bit of zero indicates that a DATA OUT phase shall not occur. The source of
defect informat ion is not specified. This is the only form of the command the SC3500
supports.

A complete list (CmpLst) bit of one indicates that the defect list sent by the initiator is a
complete list of defect s. The existing defect list is discarded by the SC3500 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 t hat contains the
existing list and any new defects the SC3500 may add during the f ormat operation.

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3.3.5 Read (6) Command – 08h

The READ (6) command request s t hat the SC3500 transfer data to the initiator. T he
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 transfe r length field specifies the number of contiguous logical blocks
of data to be transf er red. 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 Writ e ( 6) Command – 0Ah

The WRI TE (6) command requests that the target write t he dat a 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 tr ansferred.
Any other value indicates the number of logical block s t hat shall be transferred.

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3.3.7 Inquiry Command – 12h

The INQUIRY command requests t hat information regarding parameters of t he SC3500
be sent to the initiator.

Inquiry CDB
An enable vital product data (EVPD) bit of one specifies that the SC3500 return the

optional vital product data specified by the page code field. If any optional fields in the
CDB are set that the SC3500 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 t he SC3500 r eturn the standard INQUIRY data. If the
page code field is not zero, the tar get 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
SC3500 return.

The INQUIRY command shall retur n CHECK CONDITION status only when the target
cannot return the requested I NQ UIRY dat a. 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 init iat or with a pending unit attention condition,
the SC3500 will perform the INQUIRY comm and and not clear the unit attention
condition.

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Standard Inquiry Data Format
Please refer to the SCSI specification for further details on the vital product data pages

and formats.

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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 pr eviously reserved extents within a
logical unit.

Release CDB

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3.3.10 Mode Sense

The MODE SENSE (6) command provides a means for a t ar get to report parameters to
the initiator. It is a complem entary 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 r eturned MODE SENSE data, at the target’s discretion. A
DBD bit of one specifies that t he target shall not return any block descriptors in the
returned MODE SENSE data. The page contr ol (PC) field defines the type of mode
parameter values to be returned in the mode pag es. The page code specifies which
mode page to return.

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3.3.11 Send Diagnostics – 1Dh

The SEND DIAGNOSTIC comm and r equests that the SC3500 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

3.3.12 Read Capacity – 25h

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

Read Capacity CDB

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3.3.13 Extended Read (10) – 28h

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

Read (10) CDB

3.3.14 Extended Write (10)

The WRI TE (10) command requests that the SC3500 write the data transferred by the
initiator to the medium.

Writ e (10) CDB

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3.3.15 Erase Command

Erase CDB
The ERASE (10) command requests t hat 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 r ecor ded 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 SC3500
will return CHECK CONDITION, and t he 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 t he
SC3500. The command was originally created and used by tape backup devices.
When executed with ERA set, a 1 Gbyte drive can be wiped clean in about 10 seconds.
All storage locations on the drive are erased, including both user and system
(protected) data areas. At t he conclusion of the erase command, the existing Remap
Table™ is restored to memory.

SC3500 User Guide Ver 1.3 March 8, 2005 Page 18 of 28

4. GENERAL SPECIFICATIONS

Interface

SCSI Compatibility ANSI X3.131-1994
SCSI Device Type 0 - Direct Access Device
Maximum Capacity 36864 Mbytes
Bytes/Block 512
Bus Width 8 bits
Termination Active – on board

Data Transfer Specifications

Bus width 1 byte (8 bits)
Synchronous Transfer Rate 10 Mbyte/sec
Media Transfer Rate 8 Mbyte/sec
Read Transfer Rate 2.3 Mbyte/sec., sustained
Write Transfer Rate 1.0 M byte/sec sustained
Data Access time 0.7 msec

Environmental Requirements

Operating Ambient Temperature
Commercial 0
Extended -20
Industrial -40
Storage Temperature -55
Humidity 5% to 95% non-condensing
Airflow Requirements none
Ceiling no limit

Mechanical (Full Capacity)

Length 146mm (5.75 in.)
Width 102mm (4.00 in.)
Min Height 16.0mm (0.63 in.)
Drive Form Factor 3.5" low profile drive
Mounting Considerations None (any orientation)
Max Weight 18.5 ounces (525 grams)

Power Requirements

Vcc Supply +5 volts +/- 5%
Vdd Supply +12 volts not used
Power Idle 0.50 w atts
Power Active 0.90 watts
Power Max 1.10 watts

o

C to +70oC

o

C to +75oC

o

C to +85 oC

o

C to +125oC Ambient

SC3500 User Guide Ver 1.3 March 8, 2005 Page 19 of 28

A

5. JUMPER CONFIGURATION

5.1 Jumper and Switch Locations

The following diagrams show the unit and the r elative jumper and switch locations.

LED+

GND

SCSI2
SCSI1

SCSI0

Write Protect

Termination

Reserved

Parity

LED-

Figure 2: SC3500 Front view

CT LED

Fig 3: SC3500 Bottom View
SC3500 User Guide Ver 1.3 March 8, 2005 Page 20 of 28

5.2 SCSI ID Selection

The SC3500 can use any of the 8 SCSI IDs available on the SCSI bus, although the
highest priority device, SCSI ID 7, is usually reserved f or the initiator. Switch
selection for each SCSI ID is shown below. The SCSI Selection switch, E8,
determines whether the jumper block or switch is used to select the SCSI ID.

SWITCH
SCSI SEL

JUMP
SCSI2

JUMP

SCSI1

JUMP
SCSI0

SW

E3

SW

E2

SW

E1

SCSI ID

SELECTED

OFF X X X OFF OFF OFF 0
OFF X X X OFF OFF ON 1
OFF X X X OFF ON OFF 2
OFF X X X OFF ON ON 3
OFF X X X ON OFF OFF 4
OFF X X X ON OFF ON 5
OFF X X X ON ON OFF 6
OFF X X X ON ON ON 7
ON* OFF OFF OFF X X X 0*

ON OFF OFF ON X X X 1
ON OFF ON OFF X X X 2
ON OFF ON ON X X X 3
ON ON OFF OFF X X X 4
ON ON OFF ON X X X 5
ON ON ON OFF X X X 6
ON ON ON ON X X X 7

* default setting is SCSI ID0 selected from jumpers

5.3 Write Protection

Switch position E6 or the W P j um per is used to write protect the SC3500. When the
host processor sends a write command, the condition of t his switch is check ed. If
the switch or jumper is on, writes are disabled, and an error message will be
returned to the SCSI controller. Moving both the switch and jumper to the of f
position will enable writes on the board, allowing full read/write access to the
memory array.

5.4 Termination

The SC3500 employs active termination. Terminat ion is nor mally disabled on the
drive. To enable termination, set t he switch at location E4 on or install the
Termination jumper on the j um per block.

SC3500 User Guide Ver 1.3 March 8, 2005 Page 21 of 28

5.5 Termination Power

The SC3500 can supply termination power to the drive and cable by setting the
switch at position E5 on. Normally, the SCSI initiator supplies power for termination.

5.6 Parity

Parity on the SCSI interface can be enabled or disabled by using t he par ity jumper.
If the jumper is not inst alled ( default), parity is enabled. Installing the parity jumper
disables parity.

5.7 Remote LED

The SC3500 can drive a remote LED by attaching it to the last set of pins on the
jumper block. Note the polar it y of the pins as indicated in the jumper block drawing.

5.8 Reserved locations

There are two reserved jumper or switch locations that should never be set. Never
install a jumper in the sixth jumper location, and do not use the drive with switch
setting 7 in the ON position.

5.9 Memory Size

Jumpers are not used to determine the drive’s memory size. The memory size is
determined when the SC3500 is built and preformatt ed at the factory. With some
SCSI adapter cards the memory size is displayed when the BIOS message is
returned at power up. If that m em or y size changes, cont act Memtech factory repair.
Memory capacity can only be upgraded at the factory.

SC3500 User Guide Ver 1.3 March 8, 2005 Page 22 of 28

6. INSTALLATION

6.1 Default Configuration

By default, no jumpers are installed on the jumper block at the front (LED) side of
drive, and no switch positions on the switch block, accessed from the bottom of the
drive, are set to the on position. This configures the drive as follows:

DEFAULT JUMPER AND SWITCH CONFIGURATION

o SCSI ID 0, controlled by switch block
o Write Protect disabled
o Termination disabled
o Termination power sourced by cable
o Parity enabled

Always power down the unit before changing the any jumper or switch settings.
Changing these settings with power applied may result in the changes not being
recognized or worse, damage to the drive.

Note that some settings are controlled by both the jumper block (at the LED end of the
drive) and the DIP switch located on the under side of the drive. A setting is made
active (low) at either location. To deactivate a control, it must be deactivated (jumper
off and switch set to off) at both locations.

See section 5 for a detailed description of the jumper and switch block and their
locations.

6.2 Hardware Installation Procedure

6.2.1 Verify that the drive is config ur ed as r equired by the application. Many SCSI
controllers require that t he system disk be addressed as device 0 or 1 on the
SCSI bus. If a different ID is required, refer to section 5 for proper switch
settings.

6.2.2 Power off the computer system by throwing the m ain power switch.

6.2.3 Disconnect the AC power cord from the computer system.

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

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

6.2.6 Install the SC3500 into a standard 3 1/2" drive bay, or using adapter hardware,
place the unit into a 5 1/4" drive bay. Any mounting orient at ion is accept able.

6.2.7 Attach the 50-pin flat ribbon connect or from the SCSI initiator to the SC3500. If
multiple devices are to be attached to the SCSI bus, t hen r emove 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

SC3500 User Guide Ver 1.3 March 8, 2005 Page 23 of 28

termination enabled. Failure to comply with this req uir em ent may cause
erroneous operation of the SCSI bus.

6.2.8 Make sure that pin one on the cable, on the SCSI contro ller and on t he SC3500
are correctly aligned. The SC3500 connector is keyed, so a keyed cable is
recommended to maintain proper pin one orient ation.

6.2.9 Attach the power cable from the system power supply to the SC3500. T his cable
is keyed and cannot be inserted backwards. At this point, inst allation is
complete.

6.2.10 Reattach the AC power cable to the system and power the system up.

6.3 Power and Cable Attachments

The following diagram depicts the SC3500 as viewed from the connector (Back View).
Pin 1 of the SCSI interface and the power connections are as labeled.

Pin #1

+5V

GND

SC3500 – Connector View

Figure 4: SC3500 back view

6.4 Software Installation Procedure

With the SC3500 installed, the user can now treat the device as a standard Direct
Access SCSI device. Standard implementation of the SC3500 will include building a
partition table with FDISK and high-level formatting. Low level formatting is not
required or recommended as the drive is low-level formatted at the factory. Refer to
your system documentation for detailed OS installation instructions.

SC3500 User Guide Ver 1.3 March 8, 2005 Page 24 of 28

7. MECHANICAL DRAWINGS

The following are mechanical drawings f or t he SC3500. All mounting screws are
6-32 with a 0.25” maximum penetration.

Fig 5: SC3500 connector view

Figure 6: SC3500 Side View

SC3500 User Guide Ver 1.3 March 8, 2005 Page 25 of 28

Fig 7: SC3500 Bottom View

SC3500 User Guide Ver 1.3 March 8, 2005 Page 26 of 28

8. 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.

8.1 Error Blink Codes -

If the green 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

2 RO M Firmware Checks um error
3 ASI C initialization error
4 SRAM Test failed
5 Rem ap Table error
6 SCSI controller error
7 Flash/ Dat a Path error

8.2 Warning Blink Codes –

Error

The green LED is also used to indicate a number of warning conditions. If a warning
condition is encountered, the green LED will issue the number of rapid or warbling
blinks indicated below a single time, then continue the power-up pr ocedur e. 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.

Number of

Blinks

1 No Flash m em or y
2 I nvalid Remap Table
3 Rem ap Table disabled

Error

8.3 Red LED on steady at power-up-

The red LED will come on when the remap table becomes full. One or more memory
devices have exceeded their useful life. Contact Memtech repair department for repair
or upgrade options.

8.4 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.

SC3500 User Guide Ver 1.3 March 8, 2005 Page 27 of 28

9. APPENDIX

9.1 Contact Information

For Technical Support or Warranty Repair information, please contact Memtech:
7628 Las Positas Road

Livermore, CA 94551 U.S.A.
Phone: [phone]
Fax: [phone]
Email: [e-mail]

9.2 SCSI specification information

Information reg ar d ing the SCSI-II specification may be obtained from t he following
locations:

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

9.3 Limited Lifetime Warranty

Memtech SSD Corporation (Memtech) warrants your SC3500 against def ects in
material and workmanship for t he life of the drive. The warranty is void in the case
of misuse, accident, alterat ion, im pr oper installation, misapplication or the result of
unauthorized service or repair.

The implied warranties of merchant abilit y and fitness for a particular purpose, and all
other warranties, expressed or implied, except as set f or th 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.

SC3500 User Guide Ver 1.3 March 8, 2005 Page 28 of 28