topic Re: VA7400 AND BUSINESS COPY in Operating System - HP-UX

VA7400 AND BUSINESS COPY

Michael Gretton — Tue, 01 Apr 2003 13:00:05 GMT

I have a VA7400 and several HP-UX 11.00 based machines use LUNS I have created on the array. One of the machines has an LTO AutoLoader attached. What I would like to do is use business copy to make copies of the LUNS and allow my backup server write these to tape. How do I mount a business copy LUN on a machine it doesn't belong to? I would only want this machine to be able to read this copy so it can write to tape. Is what I am asking too much? Is my idea flawed?

Re: VA7400 AND BUSINESS COPY

Ross Zubritski — Tue, 01 Apr 2003 13:13:15 GMT

Are these "LUNS" visible to the backup host? i.e. are they claimed when you do an ioscsan? If so all you would have to do is sync/split then mount the Business Copy luns on the backup host RO and back up the data.

Regards,

RZ

Re: VA7400 AND BUSINESS COPY

Jdamian — Tue, 01 Apr 2003 13:34:30 GMT

If you use BC to copy LUNS, two RAID MANAGER instances are needed: one running on the host that mounts the 'source' LUNs and other running on the host that mounts the 'copy' LUNs (both RM instances may be run on the same host).

Re: VA7400 AND BUSINESS COPY

Eugeny Brychkov — Tue, 01 Apr 2003 13:41:53 GMT

Here're manuals http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&docIndexId=3124&locale=en_US&prodSeriesId=64118&prodTypeId=12169
It is not so simple as seems.
1. please make sure that you're making business copy with file system unmounted and vgs deactivated. Remember: this operation is fast, but not online;
2. I'm in doubt that you'll be able to activate BC LUN on the same machine without any modifications. BC LUN will be a copy of original one, having same boot and volume group areas;
3. as I know, to access BC LUN data on another host you can simply vgimport vg into its OS, then mount (but depends on vg configuration - all VG member LUNs should be present to be able to do it)
Eugeny