[linux-lvm] "Data alignment must not exceed device size."

[Zdenek Kabelac]

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