RSM 2000 and Veritas

[David Conder]

When we were looking at doing the same thing with our large Oracle DB on
some E6000s.  What we discovered at that time (beginning of 97) was:

1.  While you can daisy chain the RSM 2000s, you will remove some of the
redundancy of having them directly connected to the host with 2 ultra SCSIs
(the daisy chain took one of the SCSI channels)

2.  Sun at that time did not support dual porting to two hosts at the same
time for HA.

3.  Veritas did not directly support the array.  It has its own RM6 manager
that is pretty good, but is real basic.  You could run Veritas on top and
mirror with that between two arrays but then your system is back to
software mirroring which has its own performance penalties.

What we decided is because the RSM2000 is built completely internally
redundant, and can mirror internally without a host penalty, we mirrored
between the trays so if a tray failed we would still be protected.  Also,
for some mostly read tables like indexes we put on 5 disk raid strips
accross the trays which works great and gives increadibly fast read rates
and pretty good writes.

Hope this helps.

===--->david  
Tanning Technology Sys admin consultant.

----------
> From: Doug Gullett [ UNIX Sys Admin ] <wdg@funb.com>
> To: ssa-managers@Eng.Auburn.EDU; wdg@capmark.funb.com
> Subject: RSM 2000 and Veritas
> Date: Friday, June 27, 1997 12:34 PM
> 
> Sorry if this is not the right place for this question.
> We want to purchase 2 RSM 2000's and connect them to the
> same host. For maximum redundancy we want to have mirrors
> of sybase databases that span the two RSMs. Is this feasible?
> Has anyone done it already? Is there a better way? Is VERITAS
> the answer for mirroring?
> 
> Thanks,
> 
> 
> Doug Gullett
> Capital Markets, UNIX System Adminstrator
> 
> Every normal man must be tempted at times to spit on his hands, hoist the

> black flag, and begin slitting throats. -H.L.  MENCKEN-