Page 1
3.5 inch SCSI Silicon Disk Drive
PC-SDD32V3-SC, PC-SDD64V3-SC,
PC-SDD320V3-SC
User’s Guide
Thank you for purchasing the CONTEC PC-SDD32V3-SC, PCSDD64V3-SC, PC-SDD320V3-SC. Please use this product in
accordance with the procedures described in this document.
About the PC-SDD32V3-SC, PC-SDD64V3-SC,
PC-SDD320V3-SC
- This product is a silicon disk drive interchangeable with
a 3.5-inch hard disks.
- This product provides exceptional robustness against environmental
factors such as vibration and shock, and is suitable for factory
automation applications where high reliability is required.
- Low consumption electric power.
- Exceptionally quiet operation, without the motor noise of a hard disk
drive.
- It can choose from 3 models, 32MB or 64MB or 320MB, according
to a use.
- According to the ware leveling function (flash life span stretching) ),
the rewriting average life spans are about the maximum 1.8 times in
our company so far compared with the product. (Differ depending on
the use condition)
Product Configuration
- PC-SDD32V3-SC or PC-SDD64V3-SC or PC-SDD320V3-SC …1
- User’s Guide (this booklet) …1
- Screw (M3) …4
- 1 -
Page 2
PC-SDD32V3-SC, PC-SDD64V3-SC, PC-SDD320V3-SC
Hardware Specifications
Model
Format capacity 32MB 64MB 320MB
Bus specification SCSI-2
Terminator *1 OFF (The setting cannot be changed.)
Setting the ID address It is possible to set it with the JPSW on the substrate. * factory setting ID 0
Transfer rate
Bus transfer rate Synchronization : 5Mbyte/sec (Max.), Asynchronization : 5Mbyte/sec (Max.)
Memory transfer rate
(Reading) 5.0Mbyte/sec
(Writing) 0.7Mbyte/sec 1.5Mbyte/sec 3.0Mbyte/sec
Access rate (Reading) *2 2.0Mbyte/sec
(Writing) *2 0.6Mbyte/sec 1.1Mbyte/sec 1.6Mbyte/sec
Data reliability Frequency of unrecoverable errors per bit : Less than 1 / 1014 reads
ECC 64bits / Sector
Min. limit on number
of overwrites
Rated voltage 5VDC ± 5%
Power consumption 360mA (Max.)
Operating conditions
Temperature 0 to 60°C
Humidity -20 to 80°C
Storage temperature 8 to 95%RH (not condensing)
Anti-vibration 15G (Max.) (during operation)
Anti-shock 1000G (Max.) (during operation)
External dimensions (mm) 101.6(W) x 146.5(D) x 24.4(H)
Connector SCSI 50pin
Weight 260g
*1 Do not use this product in the end of built-in SCSI an equipment.
Use the terminator separately when using it in the single.
*2 An access rate is reference value. Value may not correspond by the use condition.
PC-SDD32V3-SC PC-SDD64V3-SC PC-SDD320V3-SC
300,000 times per physical overwrites
<Connection example
when single using it.>
SCSI cable (50pin)
PC
(mother board)
SBC
...
This product
... ... ...
Hardware Specifications
Active
terminator
<Connection example when two
or more SCSI equipment is used.>
SCSI cable (50pin)
PC
(mother board)
(SBC)
This product
Other SCSI
equipment
or
Active
terminator
CONTEC CO., LTD.
- 2 -
Page 3
External Dimensions
24.4
101.6
PC-SDD32V3-SC, PC-SDD64V3-SC, PC-SDD320V3-SC
SDD
146.5
[mm]
Connector Pin Assignment
SCSI connector pin assignment Power supply pin assignment
49
Pin
Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
GND
DB0
GND
DB1
GND
DB2
GND
DB3
GND
DB4
GND
DB5
GND
DB6
GND
DB7
GND
DB8
GND
GND
GND
GND
RESERVED
RESERVED
OPEN
Pin
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2 5450
Function
TERM PWR
RESERVED
RESERVED
GND
GND
GND
ANT
GND
GND
GND
BSY
GND
ACK
GND
RST
GND
MSG
GND
SEL
GND
C/D
GND
REQ
GND
I/O
51
Pin
Function
51
52
53
54
12V
GND
GND
VCC
CONTEC CO., LTD.
- 3 -
Page 4
PC-SDD32V3-SC, PC-SDD64V3-SC, PC-SDD320V3-SC
SCSI ID Setting
JP3 JP2 JP1
CN3
* A short key (JP1 to JP3) has been
installed in one side.
Explanation of each JP and CN3
(i) SCSI ID selection setting (JP1 to JP3)
0 * 1 2 3 4 5 6 7
JP3 OPEN SHORT OPEN SHORT OPEN SHORT OPEN SHORT
JP2 OPEN OPEN SHORT SHORT OPEN OPEN SHORT SHORT
JP1 OPEN OPEN OPEN OPEN SHORT SHORT SHORT SHORT
* factory setting
SDD
(ii) Access lamp connection connector (CN3)
[Applicable connector]
[Connection example]
CONTEC CO., LTD.
1 2
* The resistor of 470
1: LED+
2: LED-
is used.
Ω
Housing : HER-2 (JST)
Contact : SHE-001T-P0.6 (JST)
LED+
LED-
1
2
LED
- 4 -
Page 5
PC-SDD32V3-SC, PC-SDD64V3-SC, PC-SDD320V3-SC
Write Access Mean Time Before Failure
The PC-SDD V series accesses the same sector when overwriting a file.
If a write error occurs, a substitute sector is used (290 substitute sectors
are provided).
Accordingly, the mean time before failure for write access is the time
until all of the substitute sectors are used up.
The calculation formula is different depending on whether the size of
the file being written to is less than or greater than 32MB.
(i) Size of file being written to is less than 32MB
(ii) Size of file being written to is 32MB or more
Example 1:
All 9.6MB of a 9.6MB file is overwritten once every 5 minutes
This corresponds to case (i).
Average number of writes before failure [No. of accesses]
= 11,815,225
Number of writes per hour [Writes/Hour]
= 12 (Once every 5 minutes)
Mean time before failure for write access [Hours] = 11,815,225/12 =
984,602 (= 112 years approx.)
CONTEC CO., LTD.
- 5 -
Page 6
PC-SDD32V3-SC, PC-SDD64V3-SC, PC-SDD320V3-SC
Example 2:
All 40MB of a 40MB file is overwritten once every 5 minutes
This corresponds to case (ii)
Average number of writes before failure [No. of accesses]
= 4,325,538
Number of writes per hour [No. of accesses/Hour]
= 12 (Once every 5 minutes)
Mean time before failure for write access [Hours] = 4,325,538/12
= 360,461 (= 41 years approx.)
Example 3:
Number of swaps per hour and swap interval that will give a mean time before
failure of 10 years (87,600 hours), when the swap size is 32MB or more
This corresponds to case (ii)
Number of swaps per hour [No. of accesses/Hour]
= 4,325,538/87,600 = 49.3
Swap interval [Minutes/Swap] = 60/49.3 = 1.21
Accordingly, if the measured swap interval is 1.21 minutes or more, the
mean time before failure will be 10 years or longer.
CONTEC CO., LTD.
- 6 -
Page 7
PC-SDD32V3-SC, PC-SDD64V3-SC, PC-SDD320V3-SC
You cannot disable the Disk Cache (Reference) *1
Note that the specification of this product dictates that the Disk Cache
cannot be Disabled. (*2)
This is because this product's cache is used as a buffer for writing to the
flash as opposed to the specifications of the general hard disk drive
cache capability.
Data sent from the IDE interface are buffered into this cache and those
buffered data are subsequently written into the designated sectors, so
you cannot disable this product's cache.
*1 In the normal mode of operation, you do not need to take care of
this feature.
*2 Hard disk drives are usually provided with the cache to avoid the
overhead on the host side when writing to the disk. This cache can
be made disabled using the Mode Select command while this
product cannot be used with the cache disabled because of the
above reason.
Copyright
Copyright 2002 CONTEC CO., LTD. ALL RIGHTS RESERVED
No part of this document may be copied or reproduced in any form by
any means without prior written consent of CONTEC CO., LTD.
CONTEC CO., LTD. makes no commitment to update or keep current
the information contained in this document. The information in this
document is subject to change without notice.
All relevant issues have been considered in the preparation of this
document. Should you notice an omission or any questionable item in
this document, please feel free to notify CONTEC CO., LTD.
Regardless of the foregoing statement, CONTEC assumes no
responsibility for any errors that may appear in this document nor for
results obtained by the user as a result of using this product.
CONTEC CO., LTD.
- 7 -
Page 8
PC-SDD32V3-SC, PC-SDD64V3-SC, PC-SDD320V3-SC
Limited One-Year Warranty
CONTEC Interface boards are warranted by CONTEC CO., LTD to be
free from defects in material and workmanship for up to one year from
the date of purchase by the original purchaser.
Repair will be free of charge only when this device is returned freight
prepaid with a copy of the original invoice and a Return Merchandise
Authorization to the distributor or the CONTEC group office, from
which it was purchased.
This warranty is not applicable for scratches or normal wear, but only
for the electronic circuitry and original boards. The warranty is not
applicable if the device has been tampered with or damaged through
abuse, mistreatment, neglect, or unreasonable use, or if the original
invoice is not included, in which case repairs will be considered beyond
the warranty policy.
How to Obtain Service
For replacement or repair, return the device freight prepaid, with a copy
of the original invoice. Please obtain a Return Merchandise
Authorization Number (RMA) from the CONTEC group office where
you purchased before returning any product.
*No product will be accepted by CONTEC group without the
Liability
The obligation of the warrantor is solely to repair or replace the product. In
no event will the warrantor be liable for any incidental or consequential
damages due to such defect or consequences that arise from inexperienced
usage, misuse, or malfunction of this device.
CONTEC CO., LTD.
RMA number.
- 8 -
Loading...