metadb database replica question (SDS)

[ponetguy2]

Hello,

I just finished mirroring another server and would like to know if I should worry about which disk is the master with metadb replicas.

Can I change the order of which disk I want to be master? Currently the the server is on database /dev/dsk/c1t1d0s4 and I would prefer it to be on /dev/dsk/c1t0d0s4. If not, will it cause problems? If so, will I need to re-create the mirrors? How much more work do I need to do to accomplish this?

FYI: JASS is installed and configured on this server.

# metadb
flags first blk block count
a m p luo 16 8192 /dev/dsk/c1t1d0s4
a p luo 8208 8192 /dev/dsk/c1t1d0s4
a p luo 16400 8192 /dev/dsk/c1t1d0s4
a p luo 16 8192 /dev/dsk/c1t0d0s4
a p luo 8208 8192 /dev/dsk/c1t0d0s4
a p luo 16400 8192 /dev/dsk/c1t0d0s4

 

[ponetguy2]

anyone?

 

[kHz]

You would have to delete all replicas:

metadb -d c1t1d0s4 c1t0d0s4 (maybe use a -f)

Then run like an initial setup:

metadb -a -f -c 3 c1t0d0s4 (or however many copies you want)
metadb -a -c 3 c1t1d0s4

**NOTE: you can delete all replicas from a running system but it isn't advisable because that causes existing metadevices to become inoperable.

Why change it?

 

[ponetguy2]

I'm just trying to make this server identical to our other servers. I really don't think this would cause a problem, but my boss can get really picky.

this is the metadb output from one of our servers:


# metadb
flags first blk block count
a m p luo 16 8192 /dev/dsk/c1t0d0s4
a p luo 8208 8192 /dev/dsk/c1t0d0s4
a p luo 16400 8192 /dev/dsk/c1t0d0s4
a p luo 16 8192 /dev/dsk/c1t1d0s4
a p luo 8208 8192 /dev/dsk/c1t1d0s4
a p luo 16400 8192 /dev/dsk/c1t1d0s4

 

[kHz]

You can do it if you want to.

Boot from cdrom and then remove the replicas (like I mentioned before). Not sure if you would have to metadetach first since you would not be in multi-user mode or not, but it doubt it (because you booted of cdrom).

 

[ponetguy2]

Does it really matter? Do you foresee any problems with how I have the replicas setup?

 

[kHz]

No it doesn't matter. I don't see where you would have any problems. I originally asked "why change it?

 

[ponetguy2]

thank you kHz. I just needed that assurance.