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From: Zdenek Kabelac <zkabelac@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>,
	"Richard W.M. Jones" <rjones@redhat.com>
Subject: Re: [linux-lvm] "Data alignment must not exceed device size."
Date: Tue, 10 Apr 2018 17:04:47 +0200	[thread overview]
Message-ID: <60e0526f-3540-3193-9da6-44e880aab85f@redhat.com> (raw)
In-Reply-To: <20180410144952.GD2787@redhat.com>

Dne 10.4.2018 v 16:49 Richard W.M. Jones napsal(a):
> On Tue, Apr 10, 2018 at 04:43:12PM +0200, Zdenek Kabelac wrote:
>> Dne 10.4.2018 v 16:00 Richard W.M. Jones napsal(a):
>>> On Tue, Apr 10, 2018 at 09:47:30AM +0100, Richard W.M. Jones wrote:
>>>> Recently in Fedora something changed that stops us from creating small
>>>> LVs for testing.
>>>>
>>>> An example failure with a 64 MB partitioned disk:
>>>>
>>>> # parted -s -- /dev/sda mklabel msdos mkpart primary 128s -128s
>>>> Warning: The resulting partition is not properly aligned for best performance: 128s % 65535s != 0s
>>>> # lvm pvcreate --force /dev/sda1
>>>>    /dev/sda1: Data alignment must not exceed device size.
>>>>    Format-specific initialisation of physical volume /dev/sda1 failed.
>>>>    Failed to setup physical volume "/dev/sda1".
>>>
>>> Interestingly the alignment properties of the virtio-scsi virtual disk
>>> has changed.  On the working system:
>>>
>
>> Hi
>>
>> Could you please retest first with official final release of 4.16 kernel.
> 
> Same thing with 4.16.0-300.fc28.x86_64:
> 
>> <rescue> cat /sys/block/sda/queue/minimum_io_size
> 33553920


Forget to mention in my previous post - you should be able to override these
bad values reported from kernel with command line 'man pvcreate' options:
--dataalignment & --dataalignmentoffset


Regards

Zdenek

  reply	other threads:[~2018-04-10 15:04 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-10  8:47 [linux-lvm] "Data alignment must not exceed device size." Richard W.M. Jones
2018-04-10 14:00 ` Richard W.M. Jones
2018-04-10 14:43   ` Zdenek Kabelac
2018-04-10 14:49     ` Richard W.M. Jones
2018-04-10 15:04       ` Zdenek Kabelac [this message]
2018-04-10 15:34     ` Mike Snitzer
2018-04-10 15:01   ` Zdenek Kabelac
2018-04-10 15:05     ` Richard W.M. Jones

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