Which HDD is better?

Seagate 250 GB HDD Internal Hard Drive (ST250DM000)


vs


Seagate 250 GB HDD (ST3250318AS)


Which one is better in terms of performance?
6 answers Last reply
More about which better
  1. ST250DM000 would be my 1st choice.
    16MB cache and SATA III
    vs 8MB cache and SATA II for the ST3250318AS
  2. The (ST250DM000) is a newer model with a 16mb cache and SATA 6.0Gb/s .
    Hope you're not paying $80 for that.
    You can get 500GB units for $80.
    Seagate Barracuda 7200.12 500GB
    http://us.ncix.com/products/?sku=63468&vpn=ST500DM002&manufacture=Seagate&promoid=1012
  3. Actual performance? Probably close enough to identical that only a HDD / storage benchmark test could tell the difference.
  4. Q Whats the better HDD ?

    A The cheaper one
  5. Definitely the ST250DM000. It's a newer model than the other one.

    ST250DM000 has one disk and read/write head(specifications):
    http://www.seagate.com/docs/pdf/datasheet/disc/barracuda-data-sheet-ds1737.1-1111us.pdf

    ST3250318AS has two disks and three read/write heads(specifications):
    http://www.seagate.com/docs/pdf/datasheet/disc/ds_barracuda_7200_10.pdf

    More disks and read/write heads are worse. That means density is lower thus it's slower, uses more power per GB, it's less reliable, and it's heavier.
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