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[Discuss] On Btrfs raid and odd-count disks

Subject: [Discuss] On Btrfs raid and odd-count disks
From: richard.pieri at gmail.com (Richard Pieri)
Date: Wed, 10 Apr 2013 12:25:37 -0400
In-reply-to: <sjm7gkatlyp.fsf@mocana.ihtfp.org>
References: <5164C9F3.4040802@gmail.com> <e511dc18cf96ddb091411f8f6463f405.squirrel@mail.mohawksoft.com> <D1B1A95FBDCF7341AC8EB0A97FCCC4773BBC8927@SN2PRD0410MB372.namprd04.prod.outlook.com> <sjmwqsatoqi.fsf@mocana.ihtfp.org> <51658526.2060608@gmail.com> <sjm7gkatlyp.fsf@mocana.ihtfp.org>

On 4/10/2013 12:00 PM, Derek Atkins wrote:
> Sure, but then you're subject to the raid5 write hole (and I think raid6
> is also subject).  I'm trying to avoid that by using a raiding
> filesystem like ZFS or BTRFS.

Disable write cache on the subdevices. Or use a RAID controller with a
battery-backed cache.

-- 
Rich P.

Follow-Ups:
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References:
- [Discuss] On Btrfs raid and odd-count disks
  - From: richard.pieri at gmail.com (Richard Pieri)
- [Discuss] On Btrfs raid and odd-count disks
  - From: markw at mohawksoft.com (markw at mohawksoft.com)
- [Discuss] On Btrfs raid and odd-count disks
  - From: blu at nedharvey.com (Edward Ned Harvey (blu))
- [Discuss] On Btrfs raid and odd-count disks
  - From: warlord at MIT.EDU (Derek Atkins)
- [Discuss] On Btrfs raid and odd-count disks
  - From: richard.pieri at gmail.com (Richard Pieri)
- [Discuss] On Btrfs raid and odd-count disks
  - From: warlord at MIT.EDU (Derek Atkins)

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