topic Re: alternate link creation in Operating System - HP-UX

alternate link creation

Error_1 — Wed, 17 Oct 2001 20:35:19 GMT

i need to create a volume group with one disc using 2 PV

my pri link is c3t1d0
my alt link is c4t1d0

how do i do this?

Re: alternate link creation

James R. Ferguson — Wed, 17 Oct 2001 20:47:20 GMT

Hi:

Given that the device files represent the same physical disk, then the primary link is the first one specified when the volume group is created. A subsequent 'vgextend' adds the other pv-path as the alternate link.

in your example, either case below achieves your objective:

# vgcreate /dev/vgXX /dev/dsk/c3t1d0 /dev/dsk/c4t1d0

...or...

# vgcreate /dev/vgXX /dev/dsk/c3t1d0
# vgextend /dev/vgXX /dev/dsk/c4t1d0

Regards!

...JRF...

Re: alternate link creation

Michael Tully — Wed, 17 Oct 2001 20:58:42 GMT

Hi,

T0 create volume group you do this:

# mkdir /dev/vgxx
# mknod /dev/vgxx/group c 64 0x010000
# vgcreate /dev/vgxx /dev/dsk/c3t1d0
# vgextend /dev/vgxx /dev/dsk/c4t1d0

Substitute 0x010000 in the mknod with
next available number you have, so list
the group numbers already used first.

# ls -l /dev/*/group

HTH
-Michael