[CentOS] Performing post-installation setup tasks - for 75 minutes

> I'm doing a new install, and everything seems to have gone fine apart from
> the
> incredible amount of time it's taken.
>
> It does have 6 x  4TB drives in RAID6 and I am installing from a USB DVD
> drive
> as I had no SATA ports left, but this is getting rediculous.

Maybe you could try a network install and only use the USB DVD to boot. I
remember similar issues while installing servers using remote iso to
install via USB drive emulation with the servers management hardware.

Regards,
Simon