DISC. CF or Disk on Chip or IDE Flash Disk

[Andy Foster]

Hi,

I'm fairly new to XPe.

The development system I'm using is based on a Flash IDE HDD that plugs into
the IDE socket.

There are alternatives, such as CF, or Disk On Chip.

My question is; why might I pick CF or DoC over Flash IDE HDD, what are the
design trade offs? Cost? Performance? Reliability? Configurability?

CF storage seems cheap per MByte, but the mobo's with CF reader are more
expensive.

Any comments?

Thanks

Andy@Wyetec

 

[Slobodan Brcin \(eMVP\)]

Hi Andy,

First parameter you should consider is connector type that your board support IDE, USB, SCSI, etc....
Second parameter you should consider is read speed of device. 500KB/s, 2MB/s, 8MB/s etc.
Third number of writes per block or if there is wear leveling algorithm implemented in device.
Additional features like write protection implemented in hardware, and similar features.
Device price.

CF is usually slower other solutions and require some adapter to connect it to IDE.

Best regards,
Slobodan

PS:
You can look at:
http://www.m-sys.com/Content/Products/Product.asp?pid=29

 

[JC]

Andy,

you are correct, CF is becoming cheaper than IDE Flash drives. That's a
HUGE reason when developing an embedded device.

most use IDE Flash, in scenarios where they need the SSD, but require higher
densities... CF is getting there, but lacks the FF at this point to go where
IDE Flash Drives do. IDE flash usually is faster, but not always. Both are
about the same in reliability. The other big one, is the footprint. if your
device is a small footprint, and heat is an issue, CF might be better suited
for you. not that IDE is a fireball or anything, but they do typically run
hotter.

HTH,
JC