Disk capacity on F5 rSeries

A customer of mine has F5 iSeries with LTM, DNS, APM, and ASM/AFM licenses. Disk capacity is 465 GB. He purchased F5 rSeries on which to set up a tenant, and the disk capacity reserved for tenants is only 294 GB. 

I believe the new devices lack space, since the /config folder on the old ones is 75% full. 

This is the output on rSeries:

df -h /var/F5/system/cbip-disks

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/partition_tenant-root 294G 36G 244G 13% /var/F5/system/cbip-disks

What do you think about that?