From: nospam@needed.invalid   
      
   On Tue, 3/11/2025 8:21 AM, David W. Hodgins wrote:   
   > On Tue, 11 Mar 2025 06:52:17 -0400, Daniel70  wrote:   
   >   
   >> Some time ago, I backed up my Laptop's 500GB internal HD to an 2TB   
   >> external HD using (I forget) ... It might have been 'dd' but I doubt it.   
   >   
   > Depending on how you did it, the backup may be in a file in a partition on   
   the 2TB drive,   
   > or the partition table may have been copied so that the partitions on the   
   2TB drive are   
   > the same as they were on the 500GB drive.   
   >   
   >> However, the 500GB Internals Image took up 500GB on the External (i.e. a   
   >> byte-by-byte image, even the empty bytes, apparently!).   
   >>   
   >> Now, when I look at that External HD using my Win 11 Desk-top, it   
   >> doesn't 'see' anything.   
   >   
   > WIndows should see an "unknown" file system in the existing partition(s).   
   >   
   >> Is this because Linux is at a 'Higher'/'deeper' level than Windows can   
   >> 'see'??   
   >   
   > M$ doesn't want to make it easy for windows users to use anything else.   
   >   
   >> If I back-up this Win-11 Desktop to the same External HD, is there a   
   >> possibility that Win-11 will write itself over the Linux Image?? Or is   
   >> Win-11 able to detect that there is 'something' there so will go looking   
   >> for the next available UNUSED portion of the External HD??   
   >   
   > It really matters how the backup was done. Windows may overwrite it or it may   
   > allow you to create new partitions on the drive. I don't trust windows for   
   anything,   
   > and haven't used it much since XP. I occasionally troubleshoot things for   
   others,   
   > but try to avoid it as much as I can.   
   >   
   > Don't write anything to the drive until you know exactly what is on there.   
   Working   
   > with low level tools like dd make it easy to wipe out data with a single   
   typo.   
   >   
   > Regards, Dave Hodgins   
      
   A Macrium Rescue CD (a windows ecosystem product), can back up   
   Windows file systems, as well as EXTm file systems. Depending   
   on which version you use, it may not be compatible with C12 feature   
   (because C12 feature came after the Macrium was released). It might   
   take a paid version of Macrium to handle that (which is why people   
   create "features" this late in the life of a filesystem).   
      
   *Nothing* prevents a Windows ecosystem backup product from   
   backing up (at-rest) ZFS, BTRFS, EXT, ReiserFS and so on.   
   All that is needed, is enough of a driver to measure and determine   
   which inodes need to be recorded (and restored later), in the   
   backup .img file .   
      
   I finally got a hit, on a list that gives some notion of capability.   
   For example, Disk Genius (untested, country of origin unknown). There   
   is a lot of URL monkey business in the industry, call it astroturfing   
   and you never know when a new company appears, whether it isn't just   
   one of the older companies re-branding for profit.   
      
   https://en.wikipedia.org/wiki/Comparison_of_disk_cloning_software   
      
      Paul   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)