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1 aldridged commented Permalink

Hi anthony this is great to know. But is it supported even if it lets you do it ? ......Dan

2 AnthonyEnglish commented Permalink

Good point. Although I've had no issues with this at all, the documentation for chvg for AIX 6.1 (and 7.1) say under the -g flag: <div>&nbsp;</div> There is no support for re-sizing for the rootvg. <div>&nbsp;</div> http://bit.ly/9e88Nu <div>&nbsp;</div> Thanks for pointing this out. <br />

3 aldridged commented Permalink

Thanks anthony, I thought i had been via callaix with this previously and been told there was no support (even thought as you have shown it does work). I wonder if there will be support with the new features of storage pools on the vios servers ? Which give dynamic increases of storage .

4 AnthonyEnglish commented Permalink

Yes, the VIOS changes sound pretty exciting, especially the Suspend/Resume of all resources without missing a beat, and the sharing the storage pool across VIO servers on different managed systems. <div>&nbsp;</div> http://ibmsystemsmag.blogs.com/aixchange/2010/10/vios-updates.html <div>&nbsp;</div> That second one would allow a Virtual Media Library to be available to multiple VIO servers, which is a great and easy way of installing software, or even for DR of mksysbs in ISO format.

5 MarkChandler commented Permalink

Apart from the support side, I've also found that this may not work perfectly at lower tech-levels. I have a 6.1-TL3-SP1 box that said that chvg -g was not supported for rootvg, when I ran it. It recognised the new disk sizes when I used getconf on them, but lspv did not see the updated sizes.

6 AnthonyEnglish commented Permalink

IBM Technote IZ80021 advises <div>&nbsp;</div> chvg man page says that the -g option is not valid for concurrent vgs or for rootvg. This is incorrect as of 6.1 TL4, when this restriction was removed from chvg -g. http://bit.ly/aqq3JL <div>&nbsp;</div> Documentation is incorrect <div>&nbsp;</div> The Notes #2 and #3 under -g option will be removed.

7 aldridged commented Permalink

Great news that its supported <br /> Thanks.....Dan

8 rrpo commented Permalink

Hi everybody, <div>&nbsp;</div> chvg -g rootvg is supported: <br /> https://www-304.ibm.com/support/docview.wss?uid=isg3T1012509 <br />

9 AnthonyEnglish commented Permalink

Thanks for that Technote. Glad to have that official assurance.

10 beekerg commented Permalink

Anthony, <div>&nbsp;</div> Thanks for the helpful tip. Here is a paste from the chvg man page for the -g option. <div>&nbsp;</div> -g <br /> Will examine all the disks in the volume group to see if they have <br /> grown in size. If any disks have grown in size attempt to add <br /> additional PPs to PV. If necessary will determine proper 1016 <br /> multiplier and conversion to big vg. Notes: <br /> 1 The user might be required to execute varyoffvg and then <br /> varyonvg on the volume group for LVM to see the size change <br /> on the disks. <br /> 2 There is no support for re-sizing while the volume group is <br /> activated in classic or enhanced concurrent mode. <br /> 3 There is no support for re-sizing for the rootvg. <div>&nbsp;</div> When can we expect the notes 2 and 3 to be removed? <br />