On Saturday 23 September 2017 10:58:47 Gene Heskett wrote: > On Saturday 23 September 2017 07:43:14 Jonathan Wilson wrote: > > On Fri, 2017-09-22 at 22:07 -0400, Gene Heskett wrote: > > > Greetings; > > > > > > Trying to dd a copy of the micro-sd card the pi-3b is booting > > > from, to another micro-sd card in a usb reader/writer, and winding > > > up with nothing but an empty lost+found directory on it. > > > > > > Obviously some sort of a syntax error, but it still takes the pi > > > several hours to do it, with the traffic led on the reader/writer > > > showing continuous activity. > > > > > > Is there another way/util that actually works for making verbatim > > > backups of these limited lifetime sd cards? > > > > > > Thanks. > > > > > > Cheers, Gene Heskett > > > > I used to use dd quite a lot, usually to a file (from a disk) as I > > was playling with virtual boxes quite a bit. It "may" be that the dd > > is not from the disk, but is from a partition... or some other > > variation on the theme (1). Also, its worth typing sync after the dd > > to make sure that all disk access (write) is coalesced. If I recall > > correctly, once the sync returns to the command line then there are > > no more pending writes so even pulling the SD (not correctly > > un-mounting/ejecting it) shouldn't corrupt it. > > All followed and understood. > > > (1) When dd'ing between physical drives I always made sure they were > > matched size wise, which was probably not required but I had it in > > my head that dd'ing a drive including the partition table to a > > larger sized drive would cause issues. Where the drives were > > unmatched I'd set the new partition(s) manually, and then dd the > > partitions one at a time and I always made sure the too partition > > was set up to be the same size as the from partition (even if the > > location differed) and then do any re-sizing of the cloned partition > > & file system upwards afterwards. As I say, possibly not required in > > some/all cases but gut feelings are hard to overcome as I had it in > > my head - something to do with backup tables set at the far end of > > partitions. > > humm... backup inodes are generally at 8k offsets from the starters > location, or so I've read. > > And why, when I click on reply to list, do I get blank to: lines and > have to manually copy them from the incoming email? Its a right pita.
My problem, I didn't have folder marked as containing a mailing list. Fixed, sorry for the noise. > Cheers, Gene Heskett Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene>