[Peeweelinux] R�f. : Re: [Peeweelinux] Re: Peewee on Rocky 328 E

[peeweelinux@adis.on.ca]

--0__=vt2t3XDUdp1mP9nFx8Fj74SwK2U9W34yYuS0emPnbkb9Skk0k4H2pCJd
Content-type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-transfer-encoding: quoted-printable




Hi,

Our embedded PC card is very close to its power supply (battery), with =
only a
very few components between them (12V-5V CC/CC converter and a relay). =
Thus I
think that risks of power supply failures are quite minor. But you are =
right, I
prefere work with a ramdisk. The trouble is I do not find memory for my=
 PC Card.
It seems to be obsolete : max 32 MB on a 72 pin SIMM (single in-line me=
mory
module). The chipset only support single side DRAM. And I only find dua=
l side 72
pin DRAM. I've tested with dual side, and it do not run.

If somebody knows where I can find such memory (web site or something e=
lse ...),
he will makes me very happy...


Guillaume PREVOST






"Mark Meade" <mark@lakeshoremicro.com> on 07/03/2002 15:02:12

Veuillez r=E9pondre =E0 peeweelinux@adis.on.ca

Pour :    peeweelinux@adis.on.ca
cc :   (ccc : Guillaume Prevost/ALCATEL-SPACE)
Objet :   Re: [Peeweelinux] Re: Peewee on Rocky 328E


=

--0__=vt2t3XDUdp1mP9nFx8Fj74SwK2U9W34yYuS0emPnbkb9Skk0k4H2pCJd
Content-type: text/plain; charset=us-ascii
Content-Disposition: inline


Guillaume,

When you configure your target as a compressed (or uncompressed) ramdisk, the
entire root
file system is copied to RAM after booting the kernel.  In other words, the
target device
(floppy, flash, etc) is used only for booting.  All the files on your system
exist in RAM,
so if you make changes to any of the files, they won't survive a power fail.

Having the file system entirely in RAM is a good thing for embedded systems.  It
the
system loses power, file system corruption is not an issue because everything
will be
restored from the target device on the next boot.

Your system should not run noticeably slower, but be aware that power failures
could cause
the file system on your hard drive to have errors.

Depending on what exactly you are trying to do, it might be best to try to find
some more
RAM for the PC.

Mark

Guillaume PREVOST wrote:

>Then I've successfully tried with "Read-write root on a single partition".
>
>What is the consequence of this "Read-write root on a single partition" option
?
> My PC card will run slowly ?






_______________________________________________
Peeweelinux mailing list
Peeweelinux@adis.on.ca
http://mail.adis.on.ca/lists/listinfo/peeweelinux








--0__=vt2t3XDUdp1mP9nFx8Fj74SwK2U9W34yYuS0emPnbkb9Skk0k4H2pCJd--