Solid State Disk Modules and Cards
DOM - Disk on Module


Esis Pty Ltd - Australia - Ph 02 9481 7420  Fax 02 9481 7267  www.esis.com.au 
E-mail: click here       Go to Esis main page
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Prices (Australian dollars) do not include GST and may change without notice.  

  Jump down to   DiskonModule - DOM  They plug into IDE i/f on host CPU board

                            Solid State Disk with IDE Interface (HD replacement) plug into IDE ribbon cable

                                  PC/104  Solid State Disk cards for DiskOnChips

      Information about Wear Levelling required with solid state disks (this page)


DiskonModule - DOM - Disk On Module

These plug into IDE i/f on host CPU board, 40-pin or 44-pin.
There are also SATA i/f modules.
We can supply current items shown on the PQI website: click here
Delivery time is usually about 1 week.        iol

Standard II Series:
Industrial DOM
Industrial CF Card

Standard Series:
• Industrial DOM 40-pin
• Wide Temperature
• Secure DOM
• Industrial CF Card
2.5" size Flash Disk 44-pin
Wide-Temp 2.5" size Flash Disk 44-pin
• USB DOM

Hi-Speed Series:
Hi-Speed DOM 40-pin   
Hi-Speed ICF(Industrial CF)   
Hi-Speed Flash Disk       Data Sheet Hi-Speed DJ Wide Temp Series (.pdf)

Turbo Series:
Turbo DOM
Turbo ICF (Industrial CF)
Turbo Flash Disk       Turbo DOM Wide Temperature    Data Sheet Turbo DJ Wide Temp Series (.pdf)

PQI’s DiskOnModule emulates an ordinary magnetic hard disk.
It is based on TDK NAND Type flash memory controller technology, which is a high density,
non-volatile read/write device technology.
This product complies with 40/44 PIN IDE (ATA) standard interface and is suitable for data storage
memory medium for portable systems which have IDE interface.

Just plug the DiskOnModule into the IDE connector on the host and use the DiskOnModule the same as the hard disk drives.

Has wear levelling features ... see the description below in next item:    2.5" Flash Disk with IDE interface - PQI.

Features
· High Performance
· Non-volatile Flash Memory
· Flash data retention is guaranteed for at least 10 years,
     with no battery or other power source required.
· 100% True Mode IDE HDD Compatible
· Broad Operating System and Processors Supports
· Capacities to Gigabytes
· Low Power Consumption          Data on PQI DiskOnModule: click here
· Robust Error Correction
· High Reliability
· Design with TDK GBDriver series product to access NAND type flash memory.

Standard II Series

DOMs Industrial Wide Temperature  Price List for Standard II Series DOM & CF (-40°~+85°) (.pdf file)    2/08

CF Cards Wide Temperature:
   With or without Write Protect Switch, Single flash Chip; W:5MB/s, R: 10MB/s
   With or without Write Protect Switch, Duo flash Chip; W:10MB/s, R: 20MB/s

Hi-Speed Series

DOMs Industrial Wide Temperature  Price List for Hi-Speed Series (-40°~+85°) (.pdf file)    2/08
   DOM 40-pin or 44-pin,   Vertical or L-formed, 1.8" or  2.5" IDE Solid State Disk to 16GB

CF Cards Wide Temperature:
   With or without Write Protect Switch, Single flash Chip;
   With or without Write Protect Switch, Duo flash Chip  

Turbo Series   See pictures below

Industrial Wide Temperature   Price List for Turbo Series (.pdf file)    2/08
   DOM 40-pin or 44-pin,   Vertical,   2.5" IDE Solid State Disk to 8GB

CF Cards Wide Temperature:
   With or without Write Protect Switch, Single flash Chip;
   With or without Write Protect Switch, Duo flash Chip  


Wear Levelling

Information from manufacturer PQI.

Flash write/erase cycles
Generally the NAND type flash memory guarantees 100,000 write/erase cycles on each physical write/erase sector.
(Physical sector: means the real sector on NAND flash device.)
Logical Sector
The accessed unit by operating system (WINDOWS series, Linux.......etc). A logical sector size is 512byte.

A NAND type flash device without wear leveling algorithm might always program each logical sector to the same physical sector.
For example: A 256MB NAND flash device writing 16Kbyte/sec data into the on flash device.
The life cycle without wear levelling will be as below:
DOM Lifetime (theoretical ) =   100,000 x 0.95 / (60x60x24)  =  1.1 days

To avoid this happened our controller provides wear leveling function that will ensure the data being evenly writing onto flash device.
Example : A 256MB flash device writing 16KB data onto flash device the formula as below, with wear levelling:
DOM Lifetime (theoretical )  = (256MB-0MB)x1024x100K*0.95  /  ((16KB/sec) x 60x60x24)  = 18,014 days

Notes:
• The "0.95": After the flash is formatted the capacity might lower than the stated capacity.
• 1MB = 1024KB
• "60*60*24" = 86400 writing times per day, at 1 time /sec
• The size of your OS & AP. In this case we set it as "0"
• "16KB/sec": The data size that is writing onto flash device per second.
                         If the data less than 16KB we recommend you still calculate it with 16KB.
• "100,000": The limitation of flash memory's erase cycles.
P.S. The above formula is an ideal condition. Each NAND flash device erase cycles may vary,
so the reality DOM lifetime (theory) need to times 0.7.
• Expected minimum DOM lifetime = DOM lifetime x 0.7

Flash Drives and Operating Systems
Flash drives with wear levelling are generally suitable for running standard desktop operating systems such as Windows XP Pro, but the lifetime of the flash device will be limited by the amount and frequency of data writes done to it over a long period of time.
Generally the larger the flash drive, the more space it has to spread out the data writes, and hence the longer it will last for a given amount of activity.

The following operating systems are well suited for flash drives as they do not constantly write data to the system drive:

· Windows XP Embedded when set up to boot from a read-only partition;
· Windows Embedded CE;
· Many variants of Linux can also be configured to run from a read-only partition, or to minimise data written back to the system drive;
· plus all the lesser known OS’s (many derived from Unix) that designed for embedded systems.

Info about write cycles and wear levelling from Wikipedia: http://en.wikipedia.org/wiki/Solid_state_disk

 

PQI and TDK form Joint Venture Business to Develop Solid State Disk
2007.8.6

Taipei Taiwan - Power Quotient International Co., Ltd. has announced to form a joint venture in Taiwan with TDK Corporation, Japan to research, develop and market Disk on Module (DOM) and Solid State Disk (SSD). The new company will focus on storage solutions for industrial and commercial use PCs/Systems. Its initial capital is for PQI 40% and TDK 60%. The specific terms of the agreement are confidential.

Since the establishment in 1997, PQI has been a pioneer of the industry by introducing solid state disk (SSD) named Disk On Module (DOM) and acquiring patents for DOM on the applications of industrial PCs such as POS systems, Thin Clients, and etc.


Prices (Australian dollars) do not include GST and may change without notice.

Solid State Disk with IDE Interface

2.5" Flash Disk with IDE interface - PQI

Emulates an ordinary 2.5" 44-pin magnetic hard disk.  100mm x 69.85mm x 8.4mm 
   Drawing with dimensions
FDXXX-25B.XH7B series is PQI’s 2.5½ IDE Flash Disk   Data: click here   (.pdf file 29 pages)

No extra or special algorithm or firmware driver required.
Just plug the PQI's 2.5½ IDE FLASH DISK into the IDE slots and operate it same as general Hard Disk Drives.
Temperature operating: 0 to 70°C.    Write: 1.6MB/sec,   read 3.3MB/sec (typ.).   Burst 5.2MB/sec PIO mode 1
ECC (Error Correction Code) feature built into the hardware and firmware, will correct 1 bit errors, and detect 2 bits errors.
ECC ensures the accuracy of the data, and decreases the effect of the crosstalk on the bus.

 


PCMCIA Card Drives click here


PC/104  Solid State Disk cards

         Jump to PC/104 page

       Search the Advantech web site    

DiskOnChip 2000 Modules  -  M-Systems - Disk On Chip

DiskOnChip is now an obsolete product.  Info

Bootable Flash Disk,
bundled with M-Systems TrueFFS (True Flash File System) software

for full read/write disk emulation.           M-Systems page
(this site)
Wear levelling.
Operates with Flite (FAT-FTL/Lite) sw for O/S-less environment

DOS, Windows Embedded, NT/CE/2000, Linux, pSOS+, VxWorks, QNX, BE and more (Can be customized for other environments)

More information about "Wear Levelling", and lifespan calculator: click here

TSOP: Thin Small Outline Package: A very-thin, plastic, rectangular surface mount chip package with gull-wing pins on its two short sides.

     Search the Advantech web site


Esis Pty Ltd - Australia - Ph 02 9481 7420  Fax 02 9481 7267  www.esis.com.au 
E-mail: click here       Go to Esis main page