Mirroring without using Mirror/UX License-HPUX B.11.23

[J.Kimbrell]

Is there a way to mirror without using Mirror/UX License?
Not many resources here so was wondering if there was a way to have a live mirror without spending money....

[J.Kimbrell]

Sorry, forgot to put in the specs;
HP=UX B.11.23

thx.

[RickT_1]

Hello,

If your controllers support it you can do hardware mirroring.

Rick

[Mel Burslan]

I am with Rick on this one. If you have a SAS drive cage on your server (assuming it is an RX series hardware not an RP) you can utilize the RAID controller of this SAS enclosure.

[J.Kimbrell]

Well, one disk, one spare, no raid.
Trying to get the mirrordisk/ux but it may
be a hard sell to the mgr.
Any other ideas? Any opensource out there that would do it?

[Mel Burslan]

not as good as mirrordisk but you can set up rsync

assuming you are using LVM, create a second vg (just to have a clear cut boundary that is, otherwise you can just create more logical volumes under vg00 if you wish) On this second vg, create logical volumes other than swap and probably /tmp (I always took contents of /tmp as disposable at any time, it might be different for you though) identical to their counterparts on vg00. Mount logical volumes under a top level mount point something like

/mirror/var
/mirror/usr
etc...

rsync -av /usr/ /mirror/usr
rsync -av /var/ /mirror/var
etc...

and run these commands at certain but frequent intervals using cron. After the initial sync, they should not take any more than a minute or two unless there a massive change in data in one of these volumes, which is highly unlikely, given the source is vg00, i.e. the system volumes.

mind you, this disk will not be able to boot, but you at least will have the latest copies of your system configuration files and files people have placed on vg00 for a faster recovery time.

But, in my opinion, mirrorUX should not be a hard sell to any manager, who considers their IT infrastructure as a business critical object. If it is not, then, well, if it is down for an extended period of time, who cares.

[Torsten.]

What is the server model?