Plugging in NAS to one of my servers...via Ethernet?

What is the best way to plug a NAS unit to one of my servers? Via SCSI? Via Thunderbolt, USB3?
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If you have a spare gigabit port on the server and the NAS has a gigabit port, you *could* connect them directly together via ethernet. I've never seen a gigabit port without automatic medium-dependent interface crossover (Auto-MDIX) support, so a crossover cable shouldn't be required in that particular instance.

However, the typical way to connect a NAS box to your local area network is by hooking it to a switch on the network via ethernet and allowing it to get its IP and gateway assigned by the local DHCP server.

Is there some reason you don't want to connect it using that method?

What brand/model NAS box is it?
What server OS and release do you have? And same question in regards to the NAS type.
What are you trying to achieve?
dronethoughtAuthor Commented:
Trying to avoid buying a new server. Need basic file sharing, about 5 gigs. Already have a Windows 2012 server and an SBS2011 server which is the domain controller. Need the fastest speed possible to the files to be shared. Right now, the Windows 2012 server is a database server and do not want anything slowing it down. Trying to get the additional 5 gigs for my power users and then find a backup system for the 5 gigs.
Thank you.
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I'm not aware of any NAS boxes that small.  

You could plug an 8GB USB thumbdrive into the server, make it a share available to 'everyone' and add more space than a 5 gigabyte NAS drive would give.
dronethoughtAuthor Commented:
Hi Darr247,
Sorry, I meant to say 5 terabytes. I like your idea though.
Buffalo Linkstation Pro Duo ($115 USD)
Western Digital WD30EZRX ($110 USD x 2 = $220 USD)
$335 for a 6TB NAS (using RAID 0) with gigabit adapter.
At least RAID5 or RAID 10, not RAID0.
In terns of how to connect: use iSCSI, it's the simplest way to go in terms of configuration and later management.
If your server has an extra 1Gb ethernet card, connect it directly to the NAS, you shouldn't need a crossorver cable. If you have a 1Gb switch, connect it that way.
2012 has a built-in iSCSI initiator. Look for a NAS that provides you with an iSCSI target capability.
This way you will see the LUN on the NAS as an NTFS volume (with the familiar permissions, etc.) and can utilize your 2012 box for presenting Windows shares to your clients.

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dronethoughtAuthor Commented:
What is the best to connect an NAS unit to a PowerEdge R320 server? I tried connecting the NAS to the 1GB switch to the 1GB NIC on the R320 server and the speeds were too slow. Perhaps the NAS was too slow. Need to access 5 terrabytes
The R320 does not have iSCSI. Do I buy an external card for iSCSI? Or do I get DAS? I am obviously trying to avoid buying another server for just file sharing. But are NAS units fast?
What's your definition of slow? Most 4-drive NAS devices can sustain 55MB/s read OR write rates with large files.
Here is a Microsoft iSCSI initiator guide:
You don't need a separate device, it's a software initiator.
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