Hi Eric,
I don't have a lot of experience myself, but a lot of my fellow hackers
who specialize in obsolete machines have reported problems with CF
cards. While CF cards are supposed to emulate IDE devices, a lot of the
newer ones do not support CHS addressing and do not work in older
On the topic of wear leveling I would go with the DOM products, as
they are designed as hard drive replacements. It's pretty easy to
burn up FLASH so wear leveling is important.
FWIW, they claim that FLASH has unlimited read capability, but is limited in
the number of writes. So, at least
On the topic of wear leveling I would go with the DOM products, as
they are designed as hard drive replacements. It's pretty easy to
burn up FLASH so wear leveling is important.
FWIW, they claim that FLASH has unlimited read capability, but is
limited in the number of writes. So, at
Op 3-11-2011 21:05, Jack schreef:
Absolutely UNBELIEVABLE to me that FLASH devices are used AT ALL in
hard-disk replacements!! Last I knew, FLASH devices are writeable
only about 10,000 times. That is a LOW number of writes for disks
if one considers DIRECTORY updates that any DOS system
Jack,
Most modern flash devices have cells that are writable at least 10
times that - 100,000 cycles is the minimum you will find. Better
devices have even higher cycle counts.
DOM products have FLASH in them - Nobody said anything about DRAM. If
they had DRAM they would have to be
Op 3-11-2011 20:56, mbbrut...@brutman.com schreef:
For applications where fast access is required nothing can beat a
FLASH based device. Part of the equation there involves unit life; if
you use a FLASH based device in an environment with lots of writes
then you expect to be replacing it on
Mike,
Most modern flash devices have cells that are writable at least 10
times that - 100,000 cycles is the minimum you will find. Better
devices have even higher cycle counts.
Glad to hear, but I would still prefer a hard-disk whose lifetime is
measured in years, not in cycles.
DOM
Cheers Jack and Michael,
Apologies, Jack, for my typo - yes I meant UIDE instead. Thank you for
your clarification on its caching operation, and I look forward to
testing it on a pet project “when my boat comes in”. (Actually, maybe
FreeDOS users could justifiably consider themselves as “Frugal
Hi Mike, Andrew,
You should look for a product called Disk On Module. They are
composed of FLASH chips and are designed to be direct replacements for
IDE hard drives. Unlike a lot of CF cards that can be used with an CF
to IDE adapter but might not support CHS addressing, DOMs are
Hi again!
Sorry to react in two mails, but flash disks are a nice topic :-)
Thanks Michael for the heads-up on DOM technology - it had completely
missed my radar and after a bit of research I agree with your advise
entirely to go with that rather than SDcard/CFcard+IDE adapter...
In
My primary interest in FreeDOS was both in sustainable computing
and edutainment for primary-shool age children. That is, using
classic, award-winning DOS games freely available from the Web on
ancient laptops (e.g., 48mb max RAM, pre-USB vintage) to provide
a living example of Reduce, Reuse,
Andrew,
I anticipate replacing the dying and clunky old hard-drives for SD
cards on a 44-pin IDE adapter for better performance and improved
efficiency. I imagine that the recent improvements with FreeDOS'
EIDE would facilitate a hardware upgrade like that - am I
understanding that
Andrew,
You should look for a product called Disk On Module. They are
composed of FLASH chips and are designed to be direct replacements for
IDE hard drives. Unlike a lot of CF cards that can be used with an CF
to IDE adapter but might not support CHS addressing, DOMs are designed
as IDE
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