Cages are not just for segmenting customers but also to segment levels of security. You can have a datacenter which is accessible to your typical tech responsible for rack/stack drive change operations while maintaining an area with high impact devices which can only be accessed with an elevated credential set.
Besides racks, you can rent a plastic-looking shed that covers about 6 racks for $250,000/year from Equinix, etc.
Those are used by bank and payment companies or divisions required to undergo physical security audits, since once a client has a rack they have fairly wide-ranging physical access (this is a known threat vector.)
Note that covering racks means sprinklers and fireman access need to be carefully rethought, etc.
I've also seen small banks just put fencing over the top of cage fences.
Apologies. Mike had confirmed it with three other sources, after my initial tweet. There were apparently ‘security barriers’ and it’s not clear yet what those were.
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[ 2.1 ms ] story [ 30.8 ms ] threadThose are used by bank and payment companies or divisions required to undergo physical security audits, since once a client has a rack they have fairly wide-ranging physical access (this is a known threat vector.)
Note that covering racks means sprinklers and fireman access need to be carefully rethought, etc.
I've also seen small banks just put fencing over the top of cage fences.