If the 3U case has a SAS-expander in its backplane (which it probably
has?) you should be able to connect all drives to the Adaptec
controller, depending on the casing's exact architecture etc. That's
another two advantages of SAS, you don't need a controller port for each
harddisk (we have a Dell MD1000 with 15 drives connected to a 4-port
external sas connection) and you can mix SAS and SATA drives on a
SAS-controller.
Best regards,
Arjen
On 5-4-2007 1:42 [EMAIL PROTECTED] wrote:
In a perhaps fitting compromise, I have decide to go with a hybrid
solution:
8*73GB 15k SAS drives hooked up to Adaptec 4800SAS
PLUS
6*150GB SATA II drives hooked up to mobo (for now)
All wrapped in a 16bay 3U server. My reasoning is that the extra SATA
drives are practically free compared to the rest of the system (since
the mobo has 6 onboard connectors). I plan on putting the pg_xlog &
operating system on the sata drives and the tables/indices on the SAS
drives, although I might not use the sata drives for the xlog if they
dont pan out perf-wise. I plan on getting the battery backed module for
the adaptec (72 hours of charge time).
Thanks to everyone for the valuable input. I hope i can do you all proud
with the setup and postgres.conf optimizations.
-jay
On Apr 4, 2007, at 1:48 PM, Carlos Moreno wrote:
Problem is :), you can purchase SATA Enterprise Drives.
Problem???? I would have thought that was a good thing!!! ;-)
Carlos
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