Not sure if I missed this point in the thread, but as long as you're cloning 
all or most of the ssids on a volume you should get nearly maximum drive speed 
on cloning.  My cloning runs anywhere between 20-80Mbs, because I clone full 
volumes(or all !incomplete,!suspect ssids).  From what I see it doesn't do any 
de-multiplexing, it just reads data from list of ssids you passed to it and 
writes it in the same order.

I started full scale cloning just about 2 months ago and it has already saved 
my butt.  It turned out we had a firmware issue with our drives, but I never 
got any errors until we attempted to read the data.  Now, because of the 
cloning we are attempting to read every single saveset we back up so I started 
seeing a bunch of media errors.  After a couple of weeks of trouble shooting we 
wound up putting the latest firmware on the drives, now all is well.  Moral of 
the story is... if I hadn't been cloning I wouldn't have known I wasn't getting 
good backups until someone needed a restore.  Not a good time to find that out.

Joel


-----Original Message-----
From: Teresa Biehler [mailto:tpbsys AT RIT DOT EDU] 
Sent: Friday, April 18, 2003 3:45 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] Merits of cloning versus dual backups?

Cloning verifies that the original copy is good, but not that the clone
is.  So, which copy do you send off site?  Do you send the original
because you know that copy is verified?

-Teresa

Terry Lemons wrote:
>
> AMEN to that.  In fact, I used cloning for two purposes:
> o create a second copy for offsite storage
> o validate that the original copy is good
>
> In my experience, there is no other way to accomplish that second goal,
> except by cloning.
>
> tl
>
> Terry Lemons
> > CLARiiON Applications Integration Engineering
>         EMC²
> where information lives
>
> 4400 Computer Drive, MS D239
> Westboro MA 01580
> Phone: 508 898 7312
> Email: Lemons_Terry AT emc DOT com
>
> -----Original Message-----
> From: Wood, R A (Bob) [mailto:WoodR AT CHEVRONTEXACO DOT COM]
> Sent: Thursday, April 17, 2003 10:04 AM
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: Re: [Networker] Merits of cloning versus dual backups?
>
> The thing to note is, when you make a clone, you are validating the
> original backup. This could be priceless.
>
> Bob
>
> --
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