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Seagate 7200.12 250gb x2 RAID0

  • Hard Drives
  • Seagate
  • Storage
Last response: in Storage
August 3, 2011 11:16:11 PM

Hello everyone, i recently bought a 2nd barracuda 7200.12 for raid0 it turned out it had a access time of 12.7ms while the other hard drive access time is 15.5ms...and there the exact same drive...also is this good performance for raid0 or is it lacking...would 1 12.7ms 250gb drive be better ?

Many thanks.

More about : seagate 7200 250gb raid0

a c 590 G Storage
August 3, 2011 11:46:04 PM

Real world performance of 2 drives in RAID-0 will always be better than the performance of either drive separately; even though in this case access time is higher.
a b G Storage
August 4, 2011 12:46:29 AM

12.7ms sounds very high to me for a modern 7200rpm drive. Access times will also become longer as the disk fills up. Are the drives full?

RAID 0 will improve transfer rate but not access times. In fact you will most likely see randomaccess times exactly 1/2 way between the 2 numbers as 1/2 the requests will be handled faster and 1/2 slower assuming you're accessing data smaller than 1 block.

Have you tried the drives standalone or on another controller? Does your RAID controller have cache? Is diskcache enabled?
August 4, 2011 8:51:30 AM

This is ran on the intel controller the gigabyte controller doesnt give me good transfer rates.....also i reinstalled windows 7 and made a new RAID Array which is split into 2 one being 160gb for OS and 305gb for games and stuff. Windows infact loads slower??!?!?.....29 seconds instead of 24...

And the access time seems good also.