Date: Mon, 25 Sep 2000 15:33:46 EST From: "Alistair M" <tlli@hotmail.com> To: freebsd-questions@freebsd.org Subject: raid1 on vinum Message-ID: <LAW2-F56vnCexGFzdV300002fe4@hotmail.com>
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Hi there,
I am trying to mirror the whole OS onto a second disk I have on my machine.
The two disks are exactly the same. I am currently running with FreeBSD 4.1.
This is my config file:
drive d1 device /dev/ad2a
drive d2 device /dev/ad2e
drive d3 device /dev/ad2f
drive d4 device /dev/ad2g
drive d5 device /dev/ad3e
drive d6 device /dev/ad3f
drive d7 device /dev/ad3g
drive d8 device /dev/ad3h
# Set up volumes and mirrored plexes
volume root
plex org concat
sd length 0 drive d1
plex org concat
sd length 0 drive d5
volume root_home
plex org concat
sd length 0 drive d2
plex org concat
sd length 0 drive d6
volume var
plex org concat
sd length 0 drive d3
plex org concat
sd length 0 drive d7
volume usr
plex org concat
sd length 0 drive d4
plex org concat
sd length 0 drive d8
*This is my disklabel configuration for the two disks:
/dev/ad2
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 12582912 0 vinum 1024 8192 16 # (Cyl. 0 - 783*)
b: 2283960 37748736 swap # (Cyl. 2349*- 2491*)
c: 40032696 0 unused 0 0 # (Cyl. 0 - 2491*)
e: 6291456 12582912 vinum 1024 8192 16 # (Cyl. 783*- 1174*)
f: 6291456 18874368 vinum 1024 8192 16 # (Cyl. 1174*- 1566*)
g: 12582912 25165824 vinum 1024 8192 16 # (Cyl. 1566*- 2349*)
/dev/ad3
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
c: 40032696 0 unused 0 0 # (Cyl. 0 - 2491*)
e: 12582912 0 vinum 1024 8192 16 # (Cyl. 0 - 783*)
f: 6291456 12582912 vinum 1024 8192 16 # (Cyl. 783*- 1174*)
g: 6291456 18874368 vinum 1024 8192 16 # (Cyl. 1174*- 1566*)
h: 12582912 25165824 vinum 1024 8192 16 # (Cyl. 1566*- 2349*)
* Please note for /dev/ad3, I did not create any partitions, I simply did a
disklabel and added the partitions shown, so that they match (in size)
/dev/ad2. I am expecting that when mirroring a filesystem or partition (eg.
/usr) you don't need to actually copy the data across. vinum(8) stated that
I would need to start a volumes subdisks:
"When you create a volume with multiple plexes, vinum does not automatically
initialize the plexes...In order to synchronize them with the first plex,
you must start their subdisks, which causes vinum to copy the data from a
plex which is in the up state."
This is the output from doing the vinum "create -f /etc/vinum.cfg" command:
8 drives:
D d1 State: up Device /dev/ad2a Avail: 0/6144 MB (0%)
D d2 State: up Device /dev/ad2e Avail: 0/3072 MB (0%)
D d3 State: up Device /dev/ad2f Avail: 0/3072 MB (0%)
D d4 State: up Device /dev/ad2g Avail: 0/6144 MB (0%)
D d5 State: up Device /dev/ad3e Avail: 0/6144 MB (0%)
D d6 State: up Device /dev/ad3f Avail: 0/3072 MB (0%)
D d7 State: up Device /dev/ad3g Avail: 0/3072 MB (0%)
D d8 State: up Device /dev/ad3h Avail: 0/6144 MB (0%)
4 volumes:
V root State: up Plexes: 2 Size: 6143 MB
V root_home State: up Plexes: 2 Size: 3071 MB
V var State: up Plexes: 2 Size: 3071 MB
V usr State: up Plexes: 2 Size: 6143 MB
8 plexes:
P root.p0 C State: up Subdisks: 1 Size: 6143 MB
P root.p1 C State: faulty Subdisks: 1 Size: 6143 MB
P root_home.p0 C State: up Subdisks: 1 Size: 3071 MB
P root_home.p1 C State: faulty Subdisks: 1 Size: 3071 MB
P var.p0 C State: up Subdisks: 1 Size: 3071 MB
P var.p1 C State: faulty Subdisks: 1 Size: 3071 MB
P usr.p0 C State: up Subdisks: 1 Size: 6143 MB
P usr.p1 C State: faulty Subdisks: 1 Size: 6143 MB
8 subdisks:
S root.p0.s0 State: up PO: 0 B Size: 6143 MB
S root.p1.s0 State: empty PO: 0 B Size: 6143 MB
S root_home.p0.s0 State: up PO: 0 B Size: 3071 MB
S root_home.p1.s0 State: empty PO: 0 B Size: 3071 MB
S var.p0.s0 State: up PO: 0 B Size: 3071 MB
S var.p1.s0 State: empty PO: 0 B Size: 3071 MB
S usr.p0.s0 State: up PO: 0 B Size: 6143 MB
S usr.p1.s0 State: empty PO: 0 B Size: 6143 MB
* Why does my volumename.p1's say faulty?
* If I can ignore the 'faulty' states, do I now do a:
vinum init -w root_home.p1
and then edit rc.conf and add the disks to "vinum_drives", and
start_vinum="YES"?
I am not sure where to go from here.
Much appreciated.
Alistair.
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