- a hot swap case with ses-2 lights so the tech doesn't
grab the wrong drive,
This caught my attention and you are the storage expert here. Is there an
equivalent technology on SATA disks for controlling enclosure facilities?
(Other than SMART, I mean, which seems to be only for monitoring and not
for control.)
I have this SATA backplan-inside-enclosure with 3x Barracuda 7200 series 1
TB disks attached. The enclosure lights for the two 7200.11's respond the
right way but the one that's ought to represent the 7200.12 freaks out
(goes multi-color). Have you experienced anything similar? The tech at the
enclosure vendor tells me some Seagate disks don't support control of
enclosure lights.
--On Thursday, September 03, 2009 21:20 -0400 erik quanstrom
<quans...@quanstro.net> wrote:
On Thu Sep 3 20:53:13 EDT 2009, r...@sun.com wrote:
"None of those technologies [NFS, iSCSI, FC] scales as cheaply,
reliably, goes as big, nor can be managed as easily as stand-alone pods
with their own IP address waiting for requests on HTTPS."
http://blog.backblaze.com/2009/09/01/petabytes-on-a-budget-how-to-bui
ld-cheap-cloud-storage/
Apart from the obvious comment that I swear I used a quote like that
to justify 9P more than once, I'm very curious to know how Plan9
would perform on such a box.
Erik, do you have any comments?
i'm speaking for myself, and not for anybody else here.
i do work for coraid, and i do do what i believe. so
cavet emptor.
i think coraid's cost/petabyte is pretty competitive.
they sell 48TB 3u unit for about 20% more. though
one could not build 1 of these machines since the
case is not commercially available.
i see some warning signs about this setup. it stands
out to me that they use desktop-class drives and the
drives appear hard to swap out. the bandwith out
of the box is 125MB/s max.
aside from that, here's what i see as what you get for
that extra 20%:
- fully-supported firmware,
- full-bandwith to the disk (no port multpliers)
- double the network bandwidth
- ecc memory,
- a hot swap case with ses-2 lights so the tech doesn't
grab the wrong drive,
oh, and the coraid unit works with plan 9. :-)
- erik
