On Thu, 2004-09-16 at 10:02, Austin Theen wrote:
> I just built a very nice SATA raid cage for a client. It looked to be
> designed for both internal and external use, it would only require an
> external molex connector to power the drive cage (or sata power
> connectors it has both).
Or an independent power supply if you'd like.
> I threw 2x 200gb SATA drives and mirrored them with using linux software
> raid tools. ...
> It's not very good compared to a real intelligent raid controller like a
> PERC 4/di or Adaptec's 2110S. But not everyone can afford a $500
> controller or scsi sca drives. ...
> The whole setup cost around $400 including drives. So I think it's
> pretty inexpensive.
Add $130 more and you could use a "real intelligent raid controller"
like the 3Ware Escalade 8006-2.
> linkage..
> Addonnics 4SA 4 bay SATA Drive cage. (Fits in 3 5 1/4 internal bays)
> http://www.mwave.com/mwave/viewspec.hmx?scriteria=3450054
There are also (3) bay SATA drive cages that fit in (2) 5.25" bays.
Such (2) 5.25" bay enclosures (with a self-contained power supply) may
be easier to find. And then there are true (2) 3.5" enclosures that are
quite small on their own.
[ There are also (5) bay SATA drive cages that fit in (3) 5.25" bays for
under $150 from Enlight I believe. ]
SATA cables can be up to 1m long. EMI for external runs is debateable,
but as long as you don't start breaking out connectors, it should be
okay. [ I'd be interested if anyone has tried breaking out connectors.
]
Typically most external SATA implementations are self-contained, using
SCSI, iSCSI (GbE) or FibreChannel. But then we're back to $$$.
BTW, 3Ware also offers cards, cables and enclosures using Myranet that
combine (4) SATA into one, consolidated cable. Consider that option for
external connectivity when you have 4, 8 or 12 channel controllers.
They probably handle such approaches far better from an EMI standpoint.
-- Bryan
P.S. I've had issues with 8-bay external IEEE1394 Firewire enclosures
using ATA discs and Apple XScale systems. I recommended against
implementing such, especially since Apple did not certify the enclosure
and they seemed overpriced ($1,400 for a _lot_ of plastic). But
management at one company decided to buy them anyway. We eventually
turned it off after 1 month of constant disconnections.
-- Compatibility and update matrix of Red Hat(R) distributions: http://www.vaporwarelabs.com/files/temp/RH-Distribution-FAQ-3.html http://www.vaporwarelabs.com/files/temp/RH-Distribution-FAQ-4.html ------------------------------------------------------------------ Bryan J. Smith, E.I. b.j.smith at ieee.org----------------------------------------------------------------------- This list is provided as an unmoderated internet service by Networked Knowledge Systems (NKS). Views and opinions expressed in messages posted are those of the author and do not necessarily reflect the official policy or position of NKS or any of its employees.
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