[Gllug] moving system from one disc to another

[Nix]

On 2 Sep 2010, t. clarke spake thusly:

> Yep,  one always needs to be aware of disk caches  - hence we run the system
> on a UPS.
> I presume the system forces the disks to flush their caches to the platters
> when it does a halt though !!

Yes, but not when you do a dump(1).

> regarding block sizes, my expereince in dd-ing to character devices is that
> one only needs to ensure the the writes are an ineger multiple of 512

For block devices, the block size and alignment must be PAGE_SIZE at least.
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