On Thu, 2020-01-09 at 09:02 +0100, Klaus Singvogel wrote: > R. Ramesh wrote: > > I want to make sure > > that my current kernel version does not have any limitation to support 64bit > > ext4. > > Please consult the Kernel Wiki regarding Ext4: > > https://ext4.wiki.kernel.org/index.php/Main_Page > > You will notice that Linux 2.6.28 was the first suppored kernel with ext4, > which was released a quiet long time ago (around 2009). As your > distribution is running 3.13.0-132-generic, the support of ext4 should be > no problem (never tested it to be 100% sure).
But features keep getting added to filesystems as time goes by and it's quite possible that support for 64-bit block numbers wasn't included from the start. The man page for e2fsprogs says this about the '64bit' option: "Note that some older kernels and older versions of e2fsprogs will not support file systems with this ext4 feature enabled" -- Tixy
