LaCie 2BIG NAS User Manual page 225

JBOD (Just a Bunch of Disks)
Disks in a JBOD configuration store data sequentially. For example, data is written to Disk 1 first. Once Disk 1 is
full, data will be written to Disk 2. Two advantages to this level of RAID are the availability of 100% of the disks'
total storage capacity and easy expansion. However, all data will be lost if a single disk fails.
LaCie 2big NAS | LaCie 5big NAS Pro User Manual 225