[dm-devel] online disk resizing

[Hannes Reinecke]

Roland Mieslinger wrote:
> I did the same with HP MSA in the past, but without dm involved.
> 
> You can use "blockdev --rereadpt <blockdevice>" to make the the kernel
> recognise the new disk size (geometery). The nasty thing is that you
> have to stop all I/O to the blocdevice. 
> 
You've not only to stop all I/O, but also have to make sure that on-one
claims the device (ie no open files, not mounted, no device-mapper tables
etc.). Otherwise will the kernel reject any size updates.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
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