topic Re: Confirm creation of mirror of stripeset in Operating System - HP-UX

Confirm creation of mirror of stripeset

Michael Elleby III_1 — Mon, 07 Apr 2003 21:23:43 GMT

Hello-

I have a set of striped disks that I would like to mirror.

I put the existing 3 disks in the volume group in to a PVG called Stripeset1. I then added the 3 new disks into the volume group, putting them into their own PVG called Stripeset2

I want to confirm if I can then mirror the lv's that are striped across the disks in PVG Stripeset1 to the disks in PVG Stripeset2.

Mike-

Re: Confirm creation of mirror of stripeset

Patrick Wallek — Mon, 07 Apr 2003 21:52:03 GMT

If you are using true striping then this will NOT work. By true striping I am talking about lvcreate with the -i and -I options. HP does not support true striping and mirroring.

What you can does is use "extent-based" striping (look at the -D option to lvcreate) and mirroring together.

Have a look at the lvcreate man page for more information.

Re: Confirm creation of mirror of stripeset

Michael Elleby III_1 — Mon, 07 Apr 2003 21:59:14 GMT

Hey Patrick-

That's what I thought... Looks as if I would have to recreate the stripe with the -D option then be able to use extent-based mirroring..

Thanx.

Mike-

Re: Confirm creation of mirror of stripeset

Michael Steele_2 — Tue, 08 Apr 2003 00:40:17 GMT

Stripe and mirror is supported by HP if the extent size is 1mb instead of the usual 32k or 64k.

lvcreate -D y -s g -r n -I 1024k

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x768fe7613948d5118fef0090279cd0f9,00.html

Man page:

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B9106-90008/B9106-90008_top.html&con=/hpux/onlinedocs/B9106-90008/00/02/208-con.html&toc=/hpux/onlinedocs/B9106-90008/00/02/208-toc.html&searchterms=stripe%7cmirror%7clvcreate&queryid=20030407-193228