[CentOS] Extending a CentOS disk without reboot

Thu Dec 24 12:54:36 UTC 2015
Sander Kuusemets <sander.kuusemets at ut.ee>

I did not do pvresize because neither "pvs" or "pvdisplay" reported to 
have free space.

After reboot they did, after which doing pvresize worked successfully.

Sander Kuusemets
University of Tartu, High Performance Computing, IT Specialist
Skype: sander.kuusemets1
+372 737 5694

On 24/12/15 09:17, Gordon Messmer wrote:
> On 12/21/2015 11:15 AM, Sander Kuusemets wrote:
>> So what happened, is that after another administrator had extended 
>> the disk from VMWare, I tried to extend it from the OS side.
> ...
>> Now's when the problems happened. After writing the partition table I 
>> got the usual "Busy" error. But I needed to do this without downtime. 
>> So, what did I try to get the kernel acknowledge the partition size 
>> change:
> ...
>> * partprobe -s
> Well, partprobe is the standard advice for this situation, but I don't 
> think it actively does anything with the -s flag.  That could have 
> been the problem, but I'm not certain.
>> And while dmesg reported that it recognized the partition change, LVM 
>> did still not see it.
> You didn't include "pvresize" in that list, so I presume you didn't do 
> it.  That's the command that will inform LVM of the change.
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