[Pw_forum] SATA vs SAS

[Eduardo Menendez]

Hi,
Thanks for the replies to my question. Some answers were devoted to solid
state devices (SSD), but I had asked about SAS (Serial attached SCSI) in
comparison to SATA disks. I know that SAS are better for high I/O load. The
point is how critical ist that for QE.

I have to choice between (better CPU with SATA) vs (worse CPU with SAS).


I have the feeling (from the times of IDE hard disks), that under heavy I/O
load (using swap memory), the use of CPU drops to 1% and calculations are
impractical. I guess it is still true, i.e., heavy I/O are to be avoided in
ab initio calculations.





Eduardo Menendez Proupin
Departamento de Fisica, Facultad de Ciencias, Universidad de Chile
URL: http://www.gnm.cl/emenendez

  “Science may be described as the art of systematic oversimplification.”
Karl Popper
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