The Plan9 from Bell Labs paper discusses serving files and the central server used in their scenario:
“The central server in our installation has about 100 megabytes of memory buffer, 27 gigabytes of magnetic disks, and 350 gigabytes of bulk storage in a write-once-read-many (WORM) jukebox.”
The paper goes onto describe their use of this storage setup to demonstrate the ability to do dumps of file systems for backups & recovering or interacting with previous changes in Plan9, finishing with
“Our WORM has served a community of about 50 users for five years and has absorbed daily dumps, consuming a total of 65% of the storage in the jukebox. In that time, the manufacturer has improved the technology, doubling the capacity of the individual disks. If we were to upgrade to the new media, we would have more free space than in the original empty jukebox. Technology has created storage faster than we can use it”.