From: dwhodgins@nomail.afraid.org   
      
   On Sun, 11 Aug 2024 09:02:35 -0400, Carlos E.R.    
   wrote:   
      
   > On 2024-08-10 22:49, bad sector wrote:   
   >>   
   >> I ran mkfs.ext4 to format a new 4tb ssd to ext4 and got the alert about   
   >> *-O 64bit* and complied with it. Never seen it before, was that a smart   
   >> or useful move?   
   >>   
   >>   
   >>   
   >         64bit   
   >                Enables  the file system to be larger   
   > than 2^32 blocks. This feature is set automatically,   
   > as needed, but it can be useful to specify this feature   
   > explicitly if the file system might need  to  be  resized   
   > larger than  2^32  blocks,  even if it was smaller than   
   > that threshold when it was originally created.  Note   
   > that some older kernels and older versions of e2fsprogs   
   > will not support file systems with  this  ext4  feature   
   > enabled.   
   >   
   >   
   > Doesn't explain the implications.   
      
   Seems clear to me. Format an ext4 file system with an install that uses the   
   64 bit feature and it will not be readable or writeable using a linux install   
   that doesn't use it.   
      
   Only matters for shared file systems or removable devices that will be used   
   by more than one linux install.   
      
   The difference in space usage or speed is minor by comparison.   
      
   Regards, Dave Hodgins   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)