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Date: Sat, 23 Jun 2012 21:20:32 -0500
From: Eric Sandeen <sandeen@sandeen.net>
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Subject: Re: mkfs.xfs states log stripe unit is too large
References: <D3F781FA-CEB0-4896-9441-772A9E533354@2012.bluespice.org>
	<20120623234445.GZ19223@dastard>
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To: Dave Chinner <david@fromorbit.com>
Cc: =?ISO-8859-1?Q?Ingo_J=FCrgensmann?= <ij@2012.bluespice.org>, xfs@oss.sgi.com

On 6/23/12 6:44 PM, Dave Chinner wrote:
> On Sat, Jun 23, 2012 at 02:50:49PM +0200, Ingo J=FCrgensmann wrote:
>> muaddib:~# cat /proc/mdstat =

>> Personalities : [raid1] [raid6] [raid5] [raid4] =

>> md7 : active raid5 sdf4[3] sdd4[1] sde4[0]
>>       7811261440 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3]=
 [UUU]
> .....
> =

>> The RAID devices /dev/md0 to /dev/md4 are on my old 3x 1 TB
>> Seagate disks. Anyway, to finally come to the problem, when I try
>> to create a filesystem on the new RAID5 I get the following:  =

>>
>> muaddib:~# mkfs.xfs /dev/lv/usr
>> log stripe unit (524288 bytes) is too large (maximum is 256KiB)
>> log stripe unit adjusted to 32KiB

...

> =

>> So, the question is: =

>> - is this a bug somewhere in XFS, LVM or Linux's software RAID
>> implementation?
> =

> Not a bug at all.

Dave, I'd suggest that we should remove the warning though, if XFS picks
the wrong defaults and then overrides itself.

Rule of Silence: When a program has nothing surprising to say, it should sa=
y nothing.

;)

-Eric

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