I'd say that means they have RAID for the usual purposes but you can't configure it directly.
> 80 GB = 80000 MiB
80 GB = 76293.9 MiB = 80000 MB
At that time I wrote this excerpt:
> I observed the /dev/sda disk that comes with our VM is supposed to be 80 GB big.
> If this was to a decimal base, it would be exactly 80 000 000 000 bytes big, but
> it is actually 81923145728 bytes big. That is 80.003072 GB if you define a GB as
> 10^6 \* 1024 bytes and add 3 KiB (3072 bytes). This is quite non-standard, because
> you basically mix bases without any sort of transparency.
>
> We also have a volume mounted. /dev/sdb is currently 70 GB big where you seem to
> define a GB as IEC GiB or 2^30 bytes.