Re: Overlay ramdisk on filesystem?

[Erik Tews]

Am Do, den 15.04.2004 schrieb Timothy Miller um 23:08:
> I have a feeling that this may be a bit too off-topic, but I'm doing 
> some Linux and hardware performance tests, and some of the tests will 
> put the hardware into an unstable state which could get memory errors 
> which could cause filesystem corruption.
> 
> I would like to know how I could overlay a RAM disk over a read-only 
> filesystem so that all new files and modified files end up in the RAM 
> disk, but old files are read from the disk.  This way, when I reboot, 
> the disk reverts back.

This could be possible using a ramdisk, a filesystem on a disk (which
could be a read only block device like a cdrom too), device-mapper and
its snapshot-target. But I did not try yet.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/