Solved

Compact Flash IDE RAID

Posted on 2006-11-25
11
1,493 Views
Last Modified: 2008-03-23
I couldn't help but wonder if a 150X CF card is good enough for a hard drive.  Since a CF card is perhaps a whole lot more reliable than a hard disk drive, it wouldn't be too worrysome for me to have a striped CF RAID, right?

Ultimately, wouldn't it be worthwhile to stripe 4 or more 4GB 150X CF cards on a CF to IDE adapter?  Since there's virtually no seek time, why not get 22MB/s × 4?  88MB/s for a hard drive isn't bad, and with no seek time, no spin-up time, far fewer memory loss occurences, why not use a 16GB CF RAID setup as a main hard drive?
0
Comment
Question by:radomirthegreat
  • 5
  • 4
11 Comments
 
LVL 5

Author Comment

by:radomirthegreat
ID: 18013293
Using everyone's evidently beloved Neweg, I'll give you this extreme example of something along the lines of my question:

Compact Flash 4GB 150X card:
http://www.newegg.com/Product/Product.asp?Item=N82E16820183020

Compact Flash to IDE adapter:
http://www.newegg.com/Product/Product.asp?Item=N82E16822998002

IDE to SATA adapter:
http://www.newegg.com/Product/Product.asp?Item=N82E16822998008

Power splitters & 4-pin to floppy power adapters:
http://www.newegg.com/Product/Product.asp?Item=N82E16812119008
http://www.newegg.com/Product/Product.asp?Item=N82E16812101106

24-port SATA RAID controller card:
http://www.newegg.com/Product/Product.asp?Item=N82E16816151004

So, with this, 96GB of space is achieved, and the controller even throws in 256MB of 333MHz cache.  With the cards' supposed bandwidth of 22MB/s each, this is 528MB/s of data transfer to the main drive, and that excludes the quarter of a gigabyte of cache.

Can this be done?
0
 
LVL 30

Accepted Solution

by:
pgm554 earned 50 total points
ID: 18014871
Bear in mind that flash memory has a static number of times that it can be written to and when you exceed this life ,it's good by data.


0
 
LVL 5

Author Comment

by:radomirthegreat
ID: 18017292
So, no swap file?

That flash memory thing is a bit freaky.  How very true is this, and must I worry?
0
 
LVL 30

Expert Comment

by:pgm554
ID: 18020384
Here is a review from New Egg site:

Seems to be a speed issue:

Pros: Easy install; useful function; compact; works as advertised

Cons: very poor performance. With a super fast 150x CF card I am only able to get 3500KB/sec transfer rate. Card should be encapsulated to prevent shorting components on case. Minimal docs.

Other Thoughts: This is a great idea but I'd like to see much better performance. Also, it should have come with slot mounts since it does have holes in the board for slot mounting the card.


It's 3.5 MB/sec as opposed to 22 MB.
So there goes your speed theory.
0
 
LVL 5

Author Comment

by:radomirthegreat
ID: 18025317
That's a shame.  Well, it doesn't have to be that CF card; there are so many others.  Are there other cards that have had good transfer rates?
0
Give your grad a cloud of their own!

With up to 8TB of storage, give your favorite graduate their own personal cloud to centralize all their photos, videos and music in one safe place. They can save, sync and share all their stuff, and automatic photo backup helps free up space on their smartphone and tablet.

 
LVL 5

Author Comment

by:radomirthegreat
ID: 18220666
Hello again.  I am interested in having a solid state hard drive like a striped set of CF cards or so.  Would the CF cards really not work after some writes?  I tried to find more about this, but I couldn't find anything.
0
 
LVL 30

Expert Comment

by:pgm554
ID: 18221549
Yep,after about 1 million writes,things start to go south.

http://en.wikipedia.org/wiki/Flash_memory
0
 
LVL 30

Expert Comment

by:pgm554
ID: 18221560
Hmmm...That can be as low as 10,000 writes cycles

http://en.wikipedia.org/wiki/Wear_levelling
0
 
LVL 5

Author Comment

by:radomirthegreat
ID: 18226441
Hey, thanks a whole lot.  That's really helpful.
0
 

Expert Comment

by:aomega
ID: 21190501
You can get 300x compact flash these days, about 45mb/s transfers.  
Ebay for example sells them for about $130 for 8Gb version
http://search.ebay.ca/search/search.dll?from=R40&_trksid=m37&satitle=300x+compact+flash&category0=
There's also the new
The Delkin Compact Flash PRO 305x 16 GB for about $400.
If you raid 0 these, you might just get 80/mbs transfer rates which are great.

However, with the cost of raiding both of them and buying controlers, etc. time, etc.  You're better off buying a 16Gb Mtron which works around 80-100mb transfer rates.  Cost is about $400
http://www.dvnation.com/

The Mtron SSD even does better performance then the WD Raptors.
0

Featured Post

Scale it in WD Gold

With up to ten times the workload capacity of desktop drives, WD Gold hard drives employ advanced technology to deliver among the best in reliability, capacity, power efficiency and performance.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

I use more than 1 computer in my office for various reasons. Multiple keyboards and mice take up more than just extra space, they make working a little more complicated. Using one mouse and keyboard for all of my computers makes life easier. This co…
In the modern office, employees tend to move around the workplace a lot more freely. Conferences, collaborative groups, flexible seating and working from home require a new level of mobility. Technology has not only changed the behavior and the expe…
This tutorial demonstrates a quick way of adding group price to multiple Magento products.
Concerto provides fully managed cloud services and the expertise to provide an easy and reliable route to the cloud. Our best-in-class solutions help you address the toughest IT challenges, find new efficiencies and deliver the best application expe…

914 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now