On Fri, Aug 29, 2025 at 03:57:42PM -0000, Greg wrote: > Yes. I don't understand what he is trying to achieve beyond using dd > because it's cool or something. Maybe it is cool. My understanding is that it > produces a byte for byte copy (my understanding without looking anything > up).
Your understanding is correct. > Now, I am fuzzy on a RAID array (the OP's question calls this to my > mind), which I think is a series of disks with the same content so that > if one fails, you can replace it with another. But not to be used as a > backup strategy. +1 RAID is NOT backup - if you delete a file on a RAID-1 (mirror) system then the file is deleted on both mirrors. Much the same on other RAID levels. RAID is to allow the system to continue when there is a hardware failure. If you have RAID you still need to do daily/... backups using tar/cpio/... to a removable tape/disk/... (preferably taken to an off-site location). Sorry for repeating what you said, but many people do not understand this. Regards -- Alain Williams Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer. +44 (0) 787 668 0256 https://www.phcomp.co.uk/ Parliament Hill Computers. Registration Information: https://www.phcomp.co.uk/Contact.html #include <std_disclaimer.h>
