I changed partition label and i used this without reboot... safe or dangerous?

[newbie_]

I used the commands

sudo umount /dev/sda5

and then

sudo e2label /dev/sda5 data

for change a partition label on my HD.
Then i mounted and used this partition without reboot (the label changed only after a reboot), is this safe or dangerous? i have very important data on this partition... thank you.

[Lakshmipathi]

As for as I know,if you remove an existing/modify label ,then that will create issues with /boot/grub.conf and /etc/fstab (isometimes labels used here to mount or boot)

I don't think adding a new label,will create any issues during reboot.

I'm not 100% sure about my statement So better wait for some LF member to confirm this.

[newbie_]

No, i haven't troubles with grub/fstab configuration.
When you change a partition label on your hard disk with e2label, you can see the new label only after a reboot.
My question is: before reboot i re-mounted and used this partition, can this create some issue?

[daark.child]

I've noticed that these days many distros (except maybe Red Hat) use UUIDs to identify partitions instead of labels, so changing a label has no positive or negative effect.

[newbie_]

In /etc/fstab i used always UUIDs to identify partitions on my hard disk.

[newbie_]

I've read some document because i'm curious to know why i have to reboot to see the new label on my partitions (i know that linux must be rebooted just when kernel is updated).
Maybe i'm wrong because i'm a n00b but i try to give my thesis:
labels are located in /dev/disk/by-label path and are readed at kernel boot.
It's wrong?