Network Storage

Andrew Thrift andrew at
Sun Apr 15 18:43:23 CDT 2012

If you want something from a Tier1 the new Dell R720XD's will take 24x 
900GB SAS disks and have 16 cores.   If you order it with a SAS6-HBA you 
can add up to 8 trays of 24 x 900GB SAS disks to provide 194TB of raw 
space at quite a reasonable cost.

Alternatively, you could have a couple of "probe" servers connected to 
some nice fast SAN backend with redundant controllers.   This will 
provide failover at the probe and storage levels but will cost a fair 
bit more   :)



On 16/04/2012 11:18 a.m., George Herbert wrote:
> On Thu, Apr 12, 2012 at 3:19 PM, Jared Mauch<jared at>  wrote:
>> You can also look at a machine like this:
>> Jared Mauch
>> On Apr 12, 2012, at 5:47 PM, Matthew Luckie<mjl at>  wrote:
>>>> 1) My goal is to store the traffic may be fore ever, and analyze it in
>>>> the future for security related incidents detected by ids/ips.
>>> Take a look at "Building a Time Machine for Efficient Recording and
>>> Retrieval of High-Volume Network Traffic"
> Just FYI, it's somewhat of a tossup on large large arrays with 3.5"
> and 2.5" models.  Equivalent 3.5" units hold 36-48 HDDs, and drive
> sizes for enterprise SAS drives are 3 TB in 3.5" vs 1 TB in 2.5" now,
> so you get more per box with 3.5" drives.  Also a lot cheaper in the
> end.
> About six months ago I purchased two similar boxes for nearline
> backups purposes (lower bandwidth) with 3.5" drives; 34 x 3 TB plus a
> couple of much faster 2.5" 15k boot drives,
> post-RAID-10-and-hotspare-and-filesystem usable space was about 42 TB.
>   About $22k each.  One can go somewhat cheaper than that but the VAR
> had a good support story and "just fixed it" the next day when a RAID
> card model didn't quite work out.

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