Read only domain controllers

Other than the obvious, a situation where you cannot secure physical access to the domain controller, is there any other positive reason to have a RODC on a domain?

I have two sites and four DCs and I was thinking when I upgrade them, I would put one RODC and one writable in each site.

Has anyone seen or does anyone know of any good reasons to do this other than the physical access part?

Thanks

Cliff
crp0499CEOAsked:
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Cliff GaliherCommented:
Secure access is the only reason.
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Will SzymkowskiSenior Solution ArchitectCommented:
RODC's are pretty usuless unless you are acutally using the PrP (Password Replicaiton Policy) which will speed up login times. If you have a read/write DC in the site there is no point to put an RODC in there as well. Typically if you have a decent network connection to another geographically close site, this is sufficent for DNS/logins etc.

RODC use other DC's information to view it in a Read Only view.

I personally would not implement this unless you have specific requirement to do so.

Will.
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Guy LidbetterCommented:
Besides security, the other reason is if you have extremely slow or flaky links at a site. As replication is then one way and can be scheduled for once a day if you like.

There is no reason whatsoever to have them mixed in with a normal DC.
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crp0499CEOAuthor Commented:
Thank you
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Windows Server 2012

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