Re: LUN sharing (DS4300 with storage partitions)

On Tue, 23 May 2006 13:46:07 +0200, Piotr wrote:


[...]

Marek,

If you want to use your DS4300 storage resources in a heterogeneous
environment and prevent Windows boxes from accessing your AIX data there
is
probably no easier method then to use built-in partitioning feature.

However, if you want a logical LUN to be accessible by all hosts in your
SAN
you have no other way but mapping them together and moving data access
mechanism (ensuring data integrity in a shared storage environment) from
the
raid controller based storage partitioning level to the upper layer.

From your initial post I assume that you want to use SANergy for a DTD
lan-free backup and the only LUN you need to be accessible by all SAN
hosts
is to be a so called File Library shared by using SANergy software.
SANergy
(originally developed by Mercury Computer System) is that particular
piece
that supports file-level and byte-level locking across all systems on a
SAN
preventing corruption of your backup data.

Piotr

Piotr,

Thanks for Your help. Now I'm convinced that there's now way to do what I
want just with storage partitioning.
Your assumption about Sanergy was correct - that's why I need this
LUN to be accessible by all hosts.

What are those upper layer mechanisms You mentioned that could help
solving my problem ?

Best regards,
--
Marek


Marek,

The answer is SANergy. This is the upper layer I have mentioned in my post.
You don't need anything else.

Good luck,
Piotr

Piotr,

As You wrote in previous post SANergy allow "multi-platform" access to TSM
File Library - that's why we want to use it in our heterogenous
environment. We want to share LUN (using SANergy) to all hosts in the SAN
(AIX, Windows, etc.).

My concern is :

SANergy MDC will run on Windows.
How can I prevent this Windows host from accessing AIX luns (and
probably destroing them by writing it's own signatures).

From "IBM TotalStorage FAStT Best Practices" :
"It is a good practice to do your storage partitioning prior to connecting
to multiple hosts. Operating systems such as AIX or Windows 2000 may write
their signatures to any device they can access."

Best regards,
--
Marek



.

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