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SubjectRe: Mounting a in-ROM filesystem efficiently
----- Original Message ----- 
From: "Richard B. Johnson" <>
To: "Bradley D. LaRonde" <>
Cc: "Thomas Capricelli" <>; <>
Sent: Thursday, December 13, 2001 1:02 PM
Subject: Re: Mounting a in-ROM filesystem efficiently

> Generally, ROM based stuff is compressed before being written to
> NVRAM. It's uncompressed into a RAM-Disk and the RAM-Disk is mounted.
> That way, you can use, say, 2 megabytes of NVRAM to get a 10 to 20
> megabyte root file-system. This also allows /tmp and /var/log to be
> writable, which is a great help because the development environment
> closely approximates the run-time environment.

That's perfect if you have plenty of RAM to spare.

> FYI, generally NVRAM access is sooooo slow. I don't think you'd
> like to use it directly as a file-system and access-time will be
> a problem unless you modify the kernel.

Modify the kernel how?


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