> If we do use EDM, it would be for highly critical applications in case of
> Disaster. EDM would mirror the disks partitions. To make it worth
> while is a
> disaster, it would get mirrored across the WAN. Unless you have a
> huge bandwidth
> on your WAN that's not being used for anything else, you can see what
> restriction #1 is. Also, I believe, since EDM mirrors the
> partitions, I do not
> see any way of recovering single files: talk to EMC about this.
>

Hmm, this seems like a discussion of EMC's SRDF (remote data mirroring
facility)
not of EDM (Enterprise data manager).


> Last thing. If you are using EDM to protect a database, then what
> happens if the
> application itself destroys or corrupts the data? Then the
> corruption is mirrors
> by EDM! Since you have versioning control on ADSM, you can
> restore the data from
> a time when you know the data was still good.

Err, your back on SRDF. EDM is different, its a backup solution that uses
a Sun 4000 to control a tape device (StorageTek Icebergs are cool)with a
Fiber
connection between the Sun and the Symmetrix. The backup of Oracle is at the
tablespace layer, but it kind of expects a data-file to disk partition
mapping,
so a tablespace is constructed of multiple data files.


I am an expert (?) on EMC, having installed some 10 TB of it with another 6
TB on order. Connected it to Sequent, RS/6000, RS-SP, Sun, VMS, NT, AS/400.

If anyone wants to discuss it, is this the right place, or should we have a
private
e-mail discussion?

(PS: I will be away for two weeks as of Friday, and will disconnect from the
ADSM-L so
I don't clog my email provider, so if you want answers, email me prvately)
_________________________________________________________________________
Adrian P Challinor                                 Osiris Consultants Ltd
                                        The Database Archival Specialists
e-mail: Adrian.Challinor AT osiris.co DOT uk
www: http://www.osiris.co.uk