gmirror and the UFS file systems
Wojciech Puchar
wojtek at wojtek.tensor.gdynia.pl
Fri Nov 28 09:35:23 PST 2008
> I'm getting ready to move forward on enabling gmirror on my churches website
> server (FreeBSD 7.0-RELEASE p4). I used defaults during the install (most
> importantly for this, the file system defaults). I've read in the manual
> pages that the data for the mirror is contained in the last sector of the
> drive/partitions. So, I want to mirror the entire drive (ad4) to the second
> drive (ad5). This server doesn't yet have much data at all. I'm wondering
> if I turn on this mirror, will anything important be overwritten in the last
> sector?
is your partition size multiply of fragment size without remainder?
if not (quite a big chance) at least one sector at the end is unused and
never be.
so go on, but then fix disklabel, as c partition is 1 sector smaller.
of course - boot from livecd to do this.
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