22 Oct
2013
22 Oct
'13
5:49 p.m.
On Wed, Oct 23, 2013 at 12:40:32AM +0300, Demetre SV1UY wrote:
Can we have a system with no writting on the disk all
the time? I'm not sure.
The technique used to do this in embedded systems is often to have the
variable filesystems (/tmp, /var) mounted on a RAMdisk. At boot time
the RAMdisk is created and a stored image restored onto it from the main
flash. At system shutdown time, a new /var image is generated and stored
to flash. Thus flash is only written to when the system is regenerated.
Swap is disabled.
This would be difficult to do with the Pi because it is so limited in
main memory, but it works on larger systems just fine. I've had a FreeBSD
box running this way (with flash, no hard drive) for several years.
- Brian