From: Roman Mamedov <rm@romanrm.net>
To: "jdd@dodin.org" <jdd@dodin.org>
Cc: linux-raid@vger.kernel.org
Subject: Re: fixing raid1
Date: Mon, 1 May 2017 22:19:54 +0500 [thread overview]
Message-ID: <20170501221954.52b2dd76@natsu> (raw)
In-Reply-To: <c416bcba-7a5d-a409-42ca-2eb82eca32b7@dodin.org>
On Mon, 1 May 2017 18:34:14 +0200
"jdd@dodin.org" <jdd@dodin.org> wrote:
> I have built a three disks raid1 on openSUSE 42.2. so far so good, all
> worked perfectly
>
> but later on I had no more use of the machine with as much disks, and
> wanted to reclaim one disk. This one was in a esata dock.
>
> At the moment I didn't found a way to make this cleanly (I found it it
> too late in the linux raid wiki
> https://raid.wiki.kernel.org/index.php/A_guide_to_mdadm#Removing_a_disk_from_an_array)
>
> so, I stopped the computer and removed the dock.
>
> The computer rebooted perfectly, but in slightly degraded mode (see below)
>
> I don't find a way to tell the system that it have to forget the third
> disk. May be it's not necessary.
It appears you just need to do the 2nd step as listed in that wiki,
mdadm --grow /dev/md127 --raid-devices=2
Did you try it?
> # mdadm --detail /dev/md127
> /dev/md127:
> Version : 1.0
> Creation Time : Wed Dec 21 22:43:31 2016
> Raid Level : raid1
> Array Size : 976758592 (931.51 GiB 1000.20 GB)
> Used Dev Size : 976758592 (931.51 GiB 1000.20 GB)
> Raid Devices : 3
> Total Devices : 2
> Persistence : Superblock is persistent
>
> Intent Bitmap : Internal
>
> Update Time : Mon May 1 15:29:48 2017
> State : clean, degraded
> Active Devices : 2
> Working Devices : 2
> Failed Devices : 0
> Spare Devices : 0
>
> Name : any:jdd-raid
> UUID : 4d57c009:5d7fc724:07376d9a:8ecb39a2
> Events : 9592
>
> Number Major Minor RaidDevice State
> 0 8 1 0 active sync /dev/sda1
> 1 8 17 1 active sync /dev/sdb1
> - 0 0 2 removed
> --
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--
With respect,
Roman
next prev parent reply other threads:[~2017-05-01 17:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-01 16:34 fixing raid1 jdd
2017-05-01 17:19 ` Roman Mamedov [this message]
2017-05-01 17:43 ` jdd
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