Some Questions about OMV

Hey OMV Fans,

first, sorry for my bad english, but it is not my first/native language
second, OMV looks awesome, good work so thx for it

now my questions:
- i have installed OMV on my machine, and all works great, but the "update manager" task provided me some entries
i use OMV only as a NAS for my mediaplayer and windows PC, so is it recommend to update all ?
- my WD 3TB disks formatted as ext4 are shown as 2,69TB normaly its 2,72TB ( NTFS ) but only 2,55Tb are provided/free is this normal ?

thanks for answering
best regards

ok, thx for that
on my 3TB HDD only 2,55TB for data are free, normally its 2,72TB so 160gb are used for the ext4 Partition ?

thank you for your answers
is there any filesystem that i can use on OMV and that reserved not so much gigs?

again thanks
can you tell me which filesystem is the best ? on my box, is the transfer speed on xfs faster than ext4 ( about 10mb/s more )
i have no raid, only just each disk alone

works perfect, big thx

last question that i have at the moment
i have OMV fresh installed, i add the HDD as an ext4 and a error messege poped up, but all works fine ?!
any idea what this is ?

its
file_get_contents(/tmp/omv-initfs@_dev_sdc.build): failed to open stream: Datei oder Verzeichnis nicht gefunden

the error pops up after i create sdc1

in German:
die Meldung habe ich bekommen als ich eine Platte unter "Filesystems" erstellt habe, die Meldung kommt aber nur einmalig und es läuft derzeit auch alles. ich habe also zugriff auf die Platte

jop, only once
in my vm this message is not there, but in my fresh installed machine the message comes only once afert the first creating in the Filesystems tab, but everything runs fine

Hardware on my Machine is:
Asus P8H77-I
Celeron G1610
8GB A-Data Ram, DDR3-1333 Mhz
3x 3TB WD Green WD30EZRX
1x 320gb 2,5" Toshiba System HDD

Zitat

unlink(/tmp/omv-initfs@_dev_sdd.build): Datei oder Verzeichnis nicht gefunden

again this message after i have purchased and installed a new HDD, but everything runs fine :o