extend inner volume with outer storage volume
I used to extend a logical volume created with an internal device called /dev/sdb with a multipath device on an extrnal SAS storage called /dev/mapper/mpatha.
I know how to do it and it works fine, my question is if this kind configuration is considered "safe" and stable or it's against the best practice because it should be done on production environment.
Responses
Guru
9710 points
Hi Mario,
Good or best practice ? Well, this is very much opinion based. Technically spoken, it is definitely not recommended to
manipulate disks and partitions from within a running system. Although it is possible, it may break some things badly.
I recommend to create a bootable GParted live medium, boot from it and perform the operations from within there. :)
Regards,
Christian
I'd say, it is better to not merge remote storage luns or multipath disks with root file systems, otherwise, which would make system un-bootable if there is any issues with remote storage server. I'd rather keep multipath disk on separate vg which would facilitate in easy understanding and troubleshooting. Normally, we'd keep app data on such storage devices. Again, as Christian said it would ultimately depends on your specific requirements and needs.
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