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Re: [K12OSN] Sanity check needed before rollout



john wrote:


Why does disk speed matter so much? Aren't most operations on a file
server fairly small scale i/o once or twice a session i.e. opening a
saved document, and writing a saved document.?

The problem on a multi user machine is that every user wants the disk head to be in a different place at the same time so seek time is often more important than transfer rates. Consider what happens when everyone is using a browser and every page and image each user loads is being cached in their home directories. Scsi disks/controllers can typically take a bunch of commands at once and queue them up while IDE and most SATA's can only do one comand at a time, waiting for CPU intervention at each step.

--
  Les Mikesell
   les futuresource com


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