Ext4 Size Limits

Long time lurker but just registered while waiting for parts to arrive for a new build. I am coming from a windows ecosystem and am fairly new to linux in general.
I have been playing with OMV in a VM and noticed that I was not able to create a ext4 filesystem over 16tb. Now I know that this is a limitation of ext4 but I also have seen a few posts mention using ext4 and LVM to overcome this.

My question is this; how does using ext4 and LVM work? I know that LVM is a plugin but how does it alone allow ext4 to go bigger than 16tb?

Thanks

I currently have 11 2tb drives set up in a Raid6 and when ever I attempt to create a ext4 filesystem I keep getting this error:

Error #6000:
exception 'OMVException' with message 'Failed to create filesystem. Please check the syslog or '/var/log/openmediavault/omv-initfs@_dev_md0.log' for more details.' in /var/www/openmediavault/rpc/filesystemmgmt.inc:522
Stack trace:
#0 [internal function]: FileSystemMgmtRpc->create(Array)
#1 /usr/share/php/openmediavault/rpc.inc(265): call_user_func_array(Array, Array)
#2 /usr/share/php/openmediavault/rpc.inc(98): OMVRpc::exec('FileSystemMgmt', 'create', Array)
#3 /var/www/openmediavault/rpc.php(44): OMVJsonRpcServer->handle()
#4 {main}

Anyone care to help explain this?

I understood what he was saying but I also took it as that e2fsprogs had been updated within OMV. I guess I assumed wrong since I know almost knowing of squeeze and e2fsprogs.

Thanks

Last question regarding the ext4 limits with e2fsprog.

If one were to continue to grow their array by one HDD at a time until they hit the magic 16tb, what would happen when they tried to grow it? Since there is no support for 16tb plus sizes would it simply not allow it or ?

Thanks