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Seagate Barracuda 1TB vs 2TB Performance

Is there any difference in performance between the 1TB (ST1000DM003) and the 2TB (ST2000DM001)?
The 2TB one is 1TB platter, the ST1000DM003 writes/reads at about 190MB/s, what about the 2TB? I couldn't find any information /benchmarks about it on the web.
Thanks.
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  1. Best answer
    Here's the link to the spec sheet of the 2 drives: http://www.seagate.com/files/staticfiles/docs/pdf/datasheet/disc/barracuda-desktop-hdd-ds-1770-1-1212us.pdf

    They both have identical maximum Read/Write speeds of 210MB/s.
  2. Best answer selected by parasight.
  3. Seagate's datasheet is in error. There are actually 3 flavours of the ST2000DM001. They could have either two 1TB platters or three 667GB platters, and 4,5, or 6 heads.

    See the firmware update matrix:
    http://www.users.on.net/~fzabkar/HDD/GR-CC4H.TXT

    Also see the latest Product Manual:
    http://www.seagate.com/files/staticfiles/support/docs/manual/desktop/Barracuda%207200.14/100686584.pdf

    Sections 2.1 and 2.7 refer to 3-disk and 2-disk versions of the 2TB model.

    Also see this forum thread where the speeds are compared:
    http://forums.seagate.com/stx/board/crawl_message?board.id=ata_drives&message.id=28513

    The 3-disk version is about 20% slower than the 2-disk version.
  4. Great catch!
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