Hello.
I've just configured a server to use gmirror (using FreeBSD 6.1b2). I
followed the tutorial on
http://www.onlamp.com/pub/a/bsd/2005/11/10/FreeBSD_Basics.html and did
it install-time.
Then I read in the gmirror(8) man-page that gmirror uses the last sector
of the provider to store metadata.
My mirror consists of two IDE-disks/consumers (ad0 and ad3), both
showing a mediasize of "250059350016 (233G)" in "gmirror list". The
provider is shown as having a mediasize of 250059349504. Sectorsize = 512.
Now, how can I check whether my current partitions will cause trouble
with the metadata-sector or not? I've done some searching on the net,
but I'm still a bit confused. If I understand correctly, the consumers
ad0/ad2 span 488397168 sectors (mediasize/sectorsize), and the
mirror/gm0 spans 488397167 sectors.
Here's the output from bsdlabel:
vimes# bsdlabel /dev/mirror/gm0s1
# /dev/mirror/gm0s1:
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 6291456 0 4.2BSD 2048 16384 28552
b: 4194304 6291456 swap
c: 488392002 0 unused 0 0 # "raw" part,
don't edit
d: 41943040 10485760 4.2BSD 2048 16384 28552
e: 2097152 52428800 4.2BSD 2048 16384 28552
f: 31457280 54525952 4.2BSD 2048 16384 28552
g: 31457280 85983232 4.2BSD 2048 16384 28552
h: 370951490 117440512 4.2BSD 2048 16384 28552
So, the "h" partition, which is the last one, has offset=117440512 and
size=370951490, and if I add those together I get 488392002. Does this
mean that my "h" partition ends at 488392001 (right before 488392002),
and I'm still several sectors away from the metadata? Or am I
misunderstanding things here?
--
Regards / Hilsen
Eivind Olsen
<[EMAIL PROTECTED]>
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