Slices + stripes and mirrors

[Joerg Pernfuss]

On Sat, 20 May 2006 15:03:06 +0200
Pawel Jakub Dawidek <pjd at FreeBSD.org> wrote:

> Imagine a configuration where you have 5 disks. Create one 2GB slice
> on all disks, and use the rest space for the second slice.
> Now, create root file system by mirroring da0s1a and da1s1a.
> Create /usr/ on raid3(da2s1, da3s1, da4s1) and create /home/ on
> raid3(da0s2, da1s2, da2s2, da3s2, da4s2).
> This is the flexibility.

So true. I feel the need to give an example.

~> graid3 status
     Name    Status  Components
raid3/var  COMPLETE  ad4s1d
                     ad10s1d
                     ad12s1d

~> gmirror status
        Name    Status  Components
 mirror/root  COMPLETE  ad4s1a
                        ad6s1a
                        ad10s1a
                        ad12s1a
 mirror/usr1  COMPLETE  ad4s1f
                        ad12s1f
mirror/jail1  COMPLETE  ad4s1g
                        ad10s1g
mirror/home1  COMPLETE  ad4s1h
                        ad10s1h
 mirror/usr2  COMPLETE  ad6s1f
                        ad10s1f
mirror/jail2  COMPLETE  ad6s1g
                        ad12s1g
mirror/home2  COMPLETE  ad6s1h
                        ad12s1h

~> gstripe status
        Name  Status  Components
 stripe/swap      UP  ad4s1b
                      ad6s1b
                      ad10s1b
                      ad12s1b
  stripe/tmp      UP  ad4s1e
                      ad6s1e
                      ad10s1e
                      ad12s1e
  stripe/usr      UP  mirror/usr2
                      mirror/usr1
stripe/jails      UP  mirror/jail1
                      mirror/jail2
 stripe/home      UP  mirror/home1
                      mirror/home2

~> geli status
           Name  Status  Components
stripe/swap.eli     N/A  stripe/swap

~> mount
/dev/mirror/root on / (ufs, local)
devfs on /dev (devfs, local, multilabel)
/dev/stripe/tmp on /tmp (ufs, local)
/dev/stripe/usr on /usr (ufs, local)
/dev/raid3/var on /var (ufs, local)
/dev/stripe/home on /home (ufs, local)
/dev/stripe/jails on /jails (ufs, local)

4 discs with one slice each, geom working on top of the bsdlabels.

/ is on a 4 partition mirror
swap is geli encrypted raid 0
/tmp is raid 0
/var is raid 3
/usr is raid 10
/home is raid 10
/jails is raid 10

You can have it work on whatever you want and stack it up into
absurdness. It's such nice work.

	Joerg
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