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From: d tbsky <tbskyd@gmail.com>
To: Peter Grandi <pg@mdraid.list.sabi.co.uk>
Cc: list Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: raid10 redundancy
Date: Fri, 7 May 2021 09:37:53 +0800	[thread overview]
Message-ID: <CAC6SzHKi4Ods83AQTSz6dH87ttK8_HQ_z4Uq3iOVVc=sriBc_g@mail.gmail.com> (raw)
In-Reply-To: <24723.51054.790726.700995@cyme.ty.sabi.co.uk>

Peter Grandi <pg@mdraid.list.sabi.co.uk>
> This looks like a "homework" question... There are a lot of
> pages on the WWW that explain that in summary and detail, and
> the shortest is: RAID10 only loses data if all devices that
> compose one of mirror set become impaired at the same block
> addresses.

 yes it is like a "homework" question. but there is not many
information for linux raid10.
like someone who test raid10,f2  and said it is fast, but others said
raid1 is faster with fio under multiple sessions.
so I always just use raid1 when I have only two disks.
this time I have a need that the two disk linux raid1 may need to grow
to 3 or 4 disks in the future. and I found:

1. raid1 can not reshape to raid 10
2. raid10,f2 can not reshape
3. someone report at the list that raid 10,o2 reshape is broken.

the above seems leave me the only option is raid10,n2

  reply	other threads:[~2021-05-07  1:38 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-06  5:09 raid10 redundancy d tbsky
2021-05-06  7:48 ` Xiao Ni
2021-05-06  9:57   ` d tbsky
2021-05-06 12:38     ` Reindl Harald
2021-05-07  1:28       ` d tbsky
2021-05-08 13:47         ` keld
2021-05-09  0:52           ` Phillip Susi
2021-05-12 17:22             ` David T-G
2021-05-12 17:26               ` Reindl Harald
2021-05-12 17:39                 ` David T-G
2021-05-13 15:38               ` Andy Smith
2021-05-13 15:46               ` Phillip Susi
2021-05-13 15:59                 ` Andy Smith
2021-05-14 14:28                   ` Phillip Susi
2021-05-14 14:37                     ` Andy Smith
2021-05-17  2:07                       ` Brad Campbell
2021-05-06 13:09     ` Phillip Susi
2021-05-07  1:47       ` d tbsky
     [not found]         ` <86A76859-3098-4AB8-9AE7-46FF54736B88@websitemanagers.com.au>
2021-05-07  3:05           ` d tbsky
2021-05-07  3:26         ` Reindl Harald
2021-05-07 14:53         ` Andy Smith
2021-05-08  1:54           ` d tbsky
2021-05-08  5:55             ` Andy Smith
2021-05-09  1:10         ` Phillip Susi
2021-05-07  1:26     ` d tbsky
2021-05-06 10:39 ` Peter Grandi
2021-05-07  1:37   ` d tbsky [this message]
     [not found] ` <AD8C004B-FE83-4ABD-B58A-1F7F8683CD1F@websitemanagers.com.au>
2021-05-07  1:12   ` d tbsky
2021-05-07  9:46     ` Wols Lists
2021-05-11  0:04       ` Phil Turmel
2021-05-12 17:27         ` David T-G
2021-05-12 18:20           ` Phil Turmel
2021-05-12 16:31 ` Roy Sigurd Karlsbakk
2021-05-13 15:38   ` Phillip Susi
2021-05-13 18:21     ` Phil Turmel
2021-05-14 14:30       ` Phillip Susi
2021-05-14 14:48         ` Roy Sigurd Karlsbakk
2021-05-17 20:50           ` Phillip Susi
2021-05-17 22:21             ` Wols Lists
2021-05-18  0:12               ` Phil Turmel
2021-05-18 16:05               ` Phillip Susi
2021-05-18 17:38                 ` Reindl Harald
2021-05-18 18:51                   ` Phillip Susi
2021-05-18 19:02                     ` Reindl Harald
2021-05-18 23:48                 ` antlists
2021-05-19  3:42                   ` Adam Goryachev
2021-05-19 13:02                     ` Phillip Susi
2021-05-19 21:19                       ` Reindl Harald
2021-05-20  1:32                       ` Adam Goryachev
     [not found]                         ` <CAAMCDeeOnraMDNCF6ZZqPAxUrih2gSse1wDYgOfd1LqY-Ffqxw@mail.gmail.com>
2021-05-20 15:08                           ` antlists

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