SATA disk drive / SQL performance

I have a server with 1 SATA drive in it. I was told to get better performance, I should add a 2nd drive (non-RAID) to divide SQL files.(logs on one and db on the other)
The idea is that SQL can then do simultaneous reads and writes.
Is that true with SATA drives? I know it's recommended with SCSI drives but I'm not 100% sure that SATA will actually do true simultaneous access.
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Mike McDonaldAsked:
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metabletaCommented:
Attaching second HDD should give a boost to your DBMS. Simultanous read is controller type independent. In addition SATA is based on SCSI architecture. Good option would be to stripe between both disks (plus mirror) but this would require more HDDs and setting up RAID on them.
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