So…at work, we had a FS, but because of the really slow speed of deleting multi-GB files from ext3 filesystems (an ext3 problem, not a FS problem), we bought a 5N, which, since it uses ext4, should not have this problem.
I want to take the 5 discs from the FS, and get a new ext4 filesystem on it from the 5N.
My first naive attempt was to delete the first 4.7MB of data from all 5 disks, with
dd if=/dev/zero of=/dev/sda bs=512 count=9182
The drobo design was too clever for this, as when I inserted the disks and booted the 5N, I got a happy 5N with all the data and shares intact.
Currently, I am zeroing the entire 2TB on two of the disks, which should hopefully mess it up enough to re-initialize the whole thing. I estimate this will take about 15 hours per disk.
Does anybody (Drobo employees, etc) know how to do this faster? Just zero whatever part of the disk tells the drobo that this is part of a disk pack?
I really don’t want to do 5 of this, taking 75 hours total…even 2 at a time it will take the better part of 2 days…
Perhaps there is a super secret panel in the drobo dashboard - “Reset to factory defaults”? Would be handy if you ever wanted to sell one of these…