Re: ewf flash partitioning
From: Matt Sullivan (matt.sullivan_at_leica-geosystems.com)
Date: 09/30/04
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Date: Thu, 30 Sep 2004 10:21:36 +1000
Günter,
Yes it's easy to create partitions etc under linux, but it serves no purpose
if my XPe device can't see them!
I have now had a reply from SanDisk who confirm that the device will only
appear as a fixed disk when used in true ide mode through an adapter to an
ide bus.
Thus EWF CANNOT BE USED FOR ANY FLASH DEVICE CONNECTED THROUGH A PCMCIA
SLOT.
(Except as a ram overlay for a single partition.)
If this is incorrect, I welcome anyone to point out where I'm going wrong.
Otherwise this should really be documented somewhere - I wish I had known
this weeks ago and saved myself the trouble of finding a flash card with the
fixed bit set!
thanks,
Matt
"Günter Wirth" <g.wirth_nospam@extec.de> wrote in message
news:ujvehxfpEHA.1644@tk2msftngp13.phx.gbl...
> Hi,
>
> We use Linux to do the job, see dd, sfdisk or mkfs.msdos.
>
> Regards,
> Günter
>
> "Matt Sullivan" <matt.sullivan@leica-geosystems.com> schrieb im
> Newsbeitrag
> news:eTE0RVdpEHA.3728@TK2MSFTNGP09.phx.gbl...
>> Thanks for the help, however I'm still a little confused and I think I
>> may
>> have lead you slightly astray.
>>
>> I am using PCMCIA ATA flash cards, not CF although I understand they're
> the
>> same electrical interface. My target hardware is a JLT8401 single board
>> computer with two pcmcia slots, no floppy or hdd support (
>> www.jltmobilecomputers.com .) I only use a usb reader because it's
>> convenient on my desktop pc. I've also tried partitioning in a couple of
>> different laptops with the same results.
>>
>> The only thing that I have noticed different with my new SanDisk card is
> in
>> windows under the 'Volumes' tab of the disk properties the 'Partition
> Style'
>> is 'Master Boot Record' compared to 'Not Applicable' for the previous
>> devices I have tried.
>>
>> What defines whether True IDE mode is used? Do I physically need an
> adapter
>> from PCMCIA to IDE, or will it work through the CardBus controller in a
>> laptop and the cirrus logic PCMCIA controller in the JLT computer?
>>
>> I have found through experimentation that a windows 2000 laptop will
>> allow
>> me to delete then existing partition, then create a new partition on this
>> disk, however it forces the first partition you create to be the size of
> the
>> entire disk.
>>
>> I have in previously created multiple partitions under linux, however I
>> found that my windows systems (laptops and target xpe device) would only
>> recognise and use the first partition. Do you think I would have more
>> success with the latest SanDisk card?
>>
>> There's one other piece of info that may or may not be relevant: The bios
> of
>> the JLT computer ("Insyde software version 1.01 (3.05-25)") detects a
> pcmcia
>> flash card in the first slot as the primary master. However a card in the
>> second slot is not detected by the bios. I'm not sure if this implies
>> that
>> the first card at least is using "True IDE" mode? Or is this some
>> proprietary bios feature to support booting from pcmcia? (The bios also
>> supports the systemsoft cardboot functionality, however the bios
> detection -
>> and indeed booting from flash cards - works regardless of whether this is
>> enabled.)
>>
>> Once again, thanks for the help,
>> Matt
>>
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