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Re: How to format RAID1 correctly

To: Eric Sandeen <sandeen@xxxxxxxxxxx>, xfs@xxxxxxxxxxx
Subject: Re: How to format RAID1 correctly
From: Helmut Tessarek <tessarek@xxxxxxxxxxx>
Date: Tue, 23 Sep 2014 22:11:39 -0400
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <54222763.40107@xxxxxxxxxxx>
Openpgp: id=C11F128D
References: <5422146A.90206@xxxxxxxxxxx> <54222763.40107@xxxxxxxxxxx>
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:31.0) Gecko/20100101 Thunderbird/31.1.1
On 23.09.14 22:07 , Eric Sandeen wrote:
> but!  your raid doesn't have a 64k stripe, so that doesn't apply.

Yep, that's true, but see below.

> no geometry because md0 raid1 doesn't export any stripe geometry.

[root@atvie01s ~]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[0] sdd1[1]
      3906784064 blocks super 1.2 [2/2] [UU]
      bitmap: 0/30 pages [0KB], 65536KB chunk

So for some reason it shows a 64k chunk size even for RAID1.

That was what got me confused.

regards Helmut K. C. Tessarek
lookup http://sks.pkqs.net for KeyID 0xC11F128D

   Thou shalt not follow the NULL pointer for chaos and madness
   await thee at its end.

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