Re: Universal Disc Format (UDF) -- WAS: HD Backup

[NZG <ngustavson@emacinc.com>]

> Do _not_ use UDF on flash devices that do _not_ support it.
> You're asking for a lot of issues.
This is a device driver I've written myself and can modify if needed.
MMC/SD cards have a firmware layer that does wear-leveling and sector 
emulation, so it just looks like a standard block driver to the kernel, no 
MTD stuff is required.

In this case, the media should be transparent to the filesystem correct?
If not, what special provisions does UDF need in the block driver? 

> And it should be rather _impossible_ if your embedded systems boot from
> it.
In this case they don't. The OS boots directly from an AMD flash.
http://www.emacinc.com/som/som5282em.htm

> Consider UDF when you need to store UNIX attributes, because FAT32
> doesn't offer that.
It would be nice, but is not my primary reason for interest. I'm interested in 
UDF because of it's hot-swap capabilities, which my driver and the carrier 
board supports, but currently the fat filesystem does not (without unmounting 
it first or mounting it read-only).

NZG




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