Re: Help with space

[Duncan <1i5t5.duncan@cox.net>]

Roman Mamedov posted on Fri, 28 Feb 2014 10:34:36 +0600 as excerpted:

> But then as others mentioned it may be risky to use this FS on 32-bit at
> all, so I'd suggest trying anything else only after you reboot into a
> 64-bit kernel.

Based on what I've read on-list, btrfs is not arch-agnostic, with certain 
on-disk sizes set to native kernel page size, etc, so a filesystem 
created on one arch may well not work on another.

Question: Does this apply to x86/amd64?  Will a filesystem created/used 
on 32-bit x86 even mount/work on 64-bit amd64/x86_64, or does upgrading 
to 64-bit imply backing up (in this case) double-digit TiB of data to 
something other than btrfs and testing it, doing a mkfs on the original 
filesystem once in 64-bit mode, and restoring all that data from backup?

If the existing 32-bit x86 btrfs can't be used on 64-bit amd64, 
transferring all that data (assuming there's something big enough 
available to transfer it to!) to backup and then restoring it is going to 
hurt!

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman