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the_rock
MVP Platinum
MVP Platinum
‎2025-04-06 01:18 PM

Tip for extending disk space without entering maintanance mode or rebooting

Hey guys,

Credit for this 100% goes to @yukaia . I wanted to share it, as Im sure a lot of people may never heard about it (I certainly never have) and would always reboot, go into maintenance mode and run lvm_manager and then extend, reboot again.

Examples that can be done and works on vm, physical box, regardless of the version/jumbo hotfix:

I always recommend take backup and/or snapshot (just in case), though in my lab, that was not needed, worked like a charm.
 
Example 1:
 
Say you want to extend / dir to 35 BG:
 
First command:
 
lvresize -L35G vg_splat/lv_current
 
Then -> xfs_growfs /
 
Example 2:
 
If you wish to extend /var/log to say 55GB

 

lvresize -L55G vg_splat/lv_log

 

xfs_growfs /var/log

 

Run df -h to verify!

WARNING: As @emmap had indicated, this would prevent you from doing major upgrades (jumbos would work on same version), and I even confirmed with R&D that there is NO WAY to bypass this requirement, since OS needs to have enough unallocated space to generate snapshot during the upgrade.

 

Andy

Best,
Andy
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