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[Discuss] SSD drives vs. Mechanical drives

Subject: [Discuss] SSD drives vs. Mechanical drives
From: richard.pieri at gmail.com (Richard Pieri)
Date: Wed, 07 May 2014 13:09:20 -0400
In-reply-to: <CAJFsZ=oAL-JgeT3yoKHA+39ZWWCc830Cf4tB_2EDss-Yiz3Low@mail.gmail.com>
References: <5364F3FB.40707@blu.org> <5367AE30.5020205@borg.org> <5367B2A9.3090804@gmail.com> <5367E6E2.7050005@borg.org> <5367EB97.5070501@gmail.com> <536801C9.9030407@borg.org> <697921c8eefc4fde8852a86b2e2f3e12@CO2PR04MB684.namprd04.prod.outlook.com> <CAJFsZ=p22nncGGD3WWxv-PNsOv1chxTBZjmaL-ao465WVazgdg@mail.gmail.com> <f4147adc648047bdb6851ca347856d80@CO2PR04MB684.namprd04.prod.outlook.com> <20140507144404.GG26127@randomstring.org> <536A61F9.5000507@gmail.com> <CAJFsZ=oAL-JgeT3yoKHA+39ZWWCc830Cf4tB_2EDss-Yiz3Low@mail.gmail.com>

Bill Bogstad wrote:
> And checksums can be incorrectly generated/verified by any hardware 
> at any time.I claim that 100% data integrity is impossible. I don't 
> think even ZFS can guarantee 100% data integrity with the right set
> of bizarre hardware failures in the CPU/RAM of the computer.

ZFS and Btrfs can guarantee 100% data integrity when writes are atomic
(drives honor sync commands) and ECC RAM is in use and sufficient
redundant data is available for reconstruction when errors are detected.
I leave it to the reader to read the ZFS and Btrfs whitepapers that
explain precisely why they can make these guarantees.

-- 
Rich P.

Follow-Ups:
- [Discuss] SSD drives vs. Mechanical drives
  - From: bogstad at pobox.com (Bill Bogstad)

References:
- [Discuss] SSD drives vs. Mechanical drives
  - From: gaf at blu.org (Jerry Feldman)
- [Discuss] SSD drives vs. Mechanical drives
  - From: kentborg at borg.org (Kent Borg)
- [Discuss] SSD drives vs. Mechanical drives
  - From: richard.pieri at gmail.com (Richard Pieri)
- [Discuss] SSD drives vs. Mechanical drives
  - From: kentborg at borg.org (Kent Borg)
- [Discuss] SSD drives vs. Mechanical drives
  - From: richard.pieri at gmail.com (Richard Pieri)
- [Discuss] SSD drives vs. Mechanical drives
  - From: kentborg at borg.org (Kent Borg)
- [Discuss] SSD drives vs. Mechanical drives
  - From: blu at nedharvey.com (Edward Ned Harvey (blu))
- [Discuss] SSD drives vs. Mechanical drives
  - From: bogstad at pobox.com (Bill Bogstad)
- [Discuss] SSD drives vs. Mechanical drives
  - From: blu at nedharvey.com (Edward Ned Harvey (blu))
- [Discuss] SSD drives vs. Mechanical drives
  - From: dsr at randomstring.org (Dan Ritter)
- [Discuss] SSD drives vs. Mechanical drives
  - From: richard.pieri at gmail.com (Richard Pieri)
- [Discuss] SSD drives vs. Mechanical drives
  - From: bogstad at pobox.com (Bill Bogstad)

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