I have a Drobo 2G here with an 8TB LUN allocated with the following 4 drives inserted (in this order):
query capacity result:
(434244325376, 2047640694784, 2481885020160, 0)
Physical space… used: 2047640694784 free: 434244325376 Total: 2481885020160
drobo says firmware revision: 1 . 249 ( 17433 ) was built: Mar 19 2009,17:24:03
I have a few trillion files stored across the array (mirrors of things like CPAN, Project Gutenberg, Cygwin, hundreds of OSS source trees, system backups for dozens of systems, etc.)
I need to tune this filesystem using tune2fs (adding journal_data_ordered, sparse_super, dir_index, uninit_bg and filetype), but I want to make sure that when I do, I don’t break the Drobo underlying ‘fsck’ that runs at power-on, because it expects something in a different format than what it will be getting.
Since the underlying thin-provisioning stack is a black box (literally and figuratively), I don’t exactly know WHAT is expects to find on the physical disk platters.
Can someone who has either done this, or has a bit more knowledge let me know if this is possible? I certainly do NOT want to lose this data.
Thanks in advance.