Date: Sat, 27 Jan 2007 23:30:58 +0100 From: "Hansa" <mythtv@logic-q.nl> To: "freebsd geom" <freebsd-geom@FreeBSD.ORG> Subject: How to gmirror slices? Message-ID: <LHEFLGAENILPPDJIHADOEEHMCFAA.mythtv@logic-q.nl>
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Currently ad4 contains 3 slices:
ad4s1 swap, / and /var
ad4s2 /usr
ad4s3 /home
I wan't to mirror ad4s1 and ad4s2. I want to stripe ad4s3. Below is my
current slice setup.
Offset Size(ST) End Name PType Desc Subtype
Flags
0 63 62 - 12 unused 0
63 12578832 12578894 ad4s1 8 freebsd 165
12578895 147814065 160392959 ad4s2 8 freebsd 165
160392960 425706435 586099394 ad4s3 8 freebsd 165
586099395 15309 586114703 - 12 unused 0
Before I continue setting up the mirror I want to make sure I've setup my
slices correctly.
Reading the gmirror man page it states that the gmirror utility uses on-disk
metadata (stored in the provider's last sector) to store all needed
information.
Since I'm no expert in understanding disk structures I'm not sure what the
above means.
In my case I think I should create the folowing slice setup:
ad4s1 must end at 12578893 instead of 12578894. The next slice should begin
at 12578895 and end at 160392958 creating the space to store metadata.
Can someone please confirm?
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