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'[EE]: Compact-flash cards?'
2003\02\14@014709 by PicDude

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Thinking of putting my OS on a CF card in my PC, using a CF to IDE adapter.
But apparently some CF cards can be made bootable, and others cannot.  Any
ideas how to tell which ones will boot and which ones won't?

Cheers,
-Neil.

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2003\02\14@040812 by Peter L. Peres

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On Fri, 14 Feb 2003, PicDude wrote:

*>Thinking of putting my OS on a CF card in my PC, using a CF to IDE adapter.
*>But apparently some CF cards can be made bootable, and others cannot.  Any
*>ideas how to tell which ones will boot and which ones won't?

The ones that support ATA are bootable (ATA = IDE emulation, with
(re)writable sector 0). Apparently there are cards that have sector 0
hardwired somehow. Of course this is not advertised anywhere.

Peter

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2003\02\14@041629 by Jake Anderson

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be aware of swapfile issues
IE limited number of writes etc
why do you want to make your desktop OS on a CF card anyway?

{Original Message removed}

2003\02\14@093700 by Barry Michels

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I have an old laptop with ZipSlack running on a 128MB CF card.  It's acting
as a wireless gateway shoved under a desk and forgotten about.  No moving
parts, so it's more reliable.  There is no swap and the /tmp mount is in
ram, so very little is written to the drive.  Mostly it's reading.

Barry

{Original Message removed}

2003\02\14@094454 by M. Adam Davis
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Really?

According to the compactflash specification, all flash memory CF cards
must be ATA compliant.  Setting any particular sector to a specific
value would violate that spec, making that card non-CF compliant.

Do you have any references or resources for this info?  I currently use
4 and 8 MB cards in IDE adaptors for 'diskless' workstations and only
have an issue if I try to format the cards using a USB adaptor.  The IDE
adaptors make them look just like hard drives on a regualr machine, though.

-Adam

Peter L. Peres wrote:

{Quote hidden}

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2003\02\14@113504 by PicDude

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Not desktop, but MP3 player in car.
Alternate option is IDE 2.5  flash drive, but with
CF, I can have an external slot f/easier updates,
etc.

Not using swap right now, and don t see the need
to for this small app.  (Linux w/256MB RAM).

Cheers,
-Neil.



> {Original Message removed}

2003\02\14@113749 by PicDude

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Know of an easy way to test this?  (Other than
trying to install the OS on each?)

Cheers,
-Neil.


Peter L. Peres wrote:
>
> The ones that support ATA are bootable (ATA = IDE emulation, with
> (re)writable sector 0). Apparently there are cards that have sector 0
> hardwired somehow. Of course this is not advertised anywhere.
>
> Peter

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2003\02\14@114516 by PicDude

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Kewl -- very much the setup I ll have, but in a car.
What brand/model of CF card are you using?  And which
CF to IDE adapter (cause I m thinking it may matter).

Cheers,
-Neil.



> {Original Message removed}

2003\02\14@114522 by PicDude

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But in reality that are a lot of claims that aren t
100% true.  (Just been thru this issue with SB audio
compatibility as well).

I ve heard that some CF cards cause problems, and some
work fine, all under the same installation scheme (and
I hadn t asked what scheme that was -- USB or IDE adapter).
I do (did?) intend to update the OS on the CF using a
USB adapter on my laptop (cause I can t think of any other
easy way).

Cheers,
-Neil.




> {Original Message removed}

2003\02\14@124233 by Peter L. Peres

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On Fri, 14 Feb 2003, M. Adam Davis wrote:

*>Really?
*>
*>According to the compactflash specification, all flash memory CF cards
*>must be ATA compliant.  Setting any particular sector to a specific
*>value would violate that spec, making that card non-CF compliant.
*>
*>Do you have any references or resources for this info?  I currently use
*>4 and 8 MB cards in IDE adaptors for 'diskless' workstations and only
*>have an issue if I try to format the cards using a USB adaptor.  The IDE
*>adaptors make them look just like hard drives on a regualr machine, though.

I know that there are CF cards that cannot be formatted, and some machines
do not accept their format. They are (were ?) sold as cheap giveaways with
digital cameras. My theory is that parts of the sector 0 are used
internally to keep some counters and the respective write code does not
allow the sector to be overwritten.

Peter

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2003\02\14@125038 by Peter L. Peres

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On Fri, 14 Feb 2003, PicDude wrote:

*>Know of an easy way to test this?  (Other than
*>trying to install the OS on each?)

In theory if you try to format a bad one on a computer CF slot it will
fail. Other than that I know of no way to make sure. Small capacity ones
are more suspect than normal ones.

Peter

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2003\02\14@125253 by Peter L. Peres

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On Fri, 14 Feb 2003, PicDude wrote:

*>I ve heard that some CF cards cause problems, and some
*>work fine, all under the same installation scheme (and
*>I hadn t asked what scheme that was -- USB or IDE adapter).
*>I do (did?) intend to update the OS on the CF using a
*>USB adapter on my laptop (cause I can t think of any other
*>easy way).

Does your laptop have a network connector ? ;-)

Peter

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2003\02\14@134806 by Barry Michels

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I think it was from here (my internet connection is screwed up right now, so
I can't confirm):
http://www.pcengines.com/cflash.htm
They offer 2.5" or 3.5" versions for $20 each.

The CF card is a no-name card I got on e-bay for about $50 a year ago.

----- Original Message -----
From: "PicDude" <RemoveMEpicdudeTakeThisOuTspamNARWANI.ORG>
To: <spamBeGonePICLISTspamBeGonespamMITVMA.MIT.EDU>
Sent: Friday, February 14, 2003 11:29 AM
Subject: Re: [EE]: Compact-flash cards?


> Kewl -- very much the setup I ll have, but in a car.
> What brand/model of CF card are you using?  And which
> CF to IDE adapter (cause I m thinking it may matter).
>
> Cheers,
> -Neil.
>
>
>
> > {Original Message removed}

2003\02\14@171808 by PicDude

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Yep, but during development, I've crashed the drive
enough to need to physically put it in a machine with
another drive.  A few times.  Other option was to
put in a second drive in the mp3 unit.  Either way
is very difficult once mounted, so CF seemed like
a much nicer option f/dev.

Cheers,
-Neil.



> {Original Message removed}

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