User Manual

Drobo 5C User Guide 17
1.1.4.2 Determining Drive Space Requirements
In order to protect your data from drive failure, your Drobo 5C requires more space than
what you will use for your data, sometimes as much as double or more the amount of
space.
The best way to determine how much usable, protected storage space you will have
available for your data, based on the number and capacity of your drives, is to use
our Drobo Drive Capacity Calculator.
A shortcut to estimating the capacity available for your data is to omit the largest drive
and then add the capacity of the remaining drives. If you plan to use Dual Disk
Redundancy, omit the largest two drives.
For example:
Single Disk (Default) Redundancy
Dual Disk Redundancy
Notes:
Actual capacity is often less than what is shown in the examples above due to the
different systems used for rating capacity. This has nothing to do with the Drobo 5C.
Know that your Drobo 5C enables you to easily increase storage capacity at any
time by simply inserting additional drives or replacing smaller drives with larger
ones.
In the Drobo 5C device, 64TB space is available for storage.