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From: Wols Lists <antlists@youngman.org.uk>
To: Phillip Susi <phill@thesusis.net>
Cc: Brian Allen Vanderburg II <brianvanderburg2@aim.com>,
	linux-raid@vger.kernel.org
Subject: Re: Linux raid-like idea
Date: Mon, 14 Sep 2020 18:26:32 +0100	[thread overview]
Message-ID: <5F5FA7C8.6010001@youngman.org.uk> (raw)
In-Reply-To: <87k0ww6ztv.fsf@vps.thesusis.net>

On 14/09/20 18:19, Phillip Susi wrote:
> 
> antlists writes:
> 
>> Yup. Raid 6 has two parity disks, and that's mirrored to give four 
>> parity disks. So as an *absolute* *minimum*, raid-61 could lose four 
>> disks with no data loss.
> 
> Don't you mean 5 disks?
> 
> At best 4 lost disks paired off in each raid1 means the raid6 sees two
> failures.  One more disk failing isn't enough to take out another mirror
> so the raid6 keeps ticking.
> 
Well caught !!!

Cheers,
Wol

  reply	other threads:[~2020-09-14 17:27 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1cf0d18c-2f63-6bca-9884-9544b0e7c54e.ref@aim.com>
2020-08-24 17:23 ` Linux raid-like idea Brian Allen Vanderburg II
2020-08-28 15:31   ` antlists
2020-09-05 21:47     ` Brian Allen Vanderburg II
2020-09-05 22:42       ` Wols Lists
2020-09-11 15:14         ` Brian Allen Vanderburg II
2020-09-11 19:16           ` antlists
2020-09-11 20:14             ` Brian Allen Vanderburg II
2020-09-12  6:09               ` Song Liu
2020-09-12 14:40               ` Adam Goryachev
2020-09-12 16:19               ` antlists
2020-09-12 17:28                 ` John Stoffel
2020-09-12 18:41                   ` antlists
2020-09-13 12:50                     ` John Stoffel
2020-09-13 16:01                       ` Wols Lists
2020-09-13 23:49                         ` Brian Allen Vanderburg II
2020-09-15  2:12                           ` John Stoffel
     [not found]                             ` <43ce60a7-64d1-51bc-f29c-7a6388ad91d5@grumpydevil.homelinux.org>
2020-09-15 18:12                               ` John Stoffel
2020-09-15 19:52                                 ` Rudy Zijlstra
2020-09-15  2:09                         ` John Stoffel
2020-09-15 11:14                           ` Roger Heflin
2020-09-15 18:07                             ` John Stoffel
2020-09-15 19:34                               ` Ram Ramesh
2020-09-14 17:19                 ` Phillip Susi
2020-09-14 17:26                   ` Wols Lists [this message]
2020-09-15 11:32       ` Nix
2020-09-15 18:10         ` John Stoffel

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