1. The HFS and TSM

The HFS (Hierarchical File Server) is an Oxford University centrally funded service providing data backup and long-term archive services to senior members, postgraduates and staff.

The HFS is widely and extensively used throughout Oxford. In the 7 days up to 2014-Aug-20, 4601 clients accessed the backup and archive servers in 26239 sessions, sending 71.0 million files and 92.5 TB of data. In total the backup and archive servers currently hold 2.750 billion files and 2341.3 TB of data.

We welcome any comments or suggestions about the service using our feedback form.

2. How it works

Your data is sent from your computer, across the university network to the HFS servers and is then ultimately stored on magnetic tape in an automated (robotic) tape library. Our servers and tape library are situated in a climate-controlled, secure location. Three copies of your data are made, each to separate tapes: one copy is held in the automated tape library while two copies are stored in separately located fire-proof safes. Access to the data is private to the owner and is normally available 24 hours a day, seven days a week.

The HFS 3494 tape library was replaced in 2012, after sixteen years long service, by two TS3500 IBM tape libraries dual-sited across two data centres. The online tape library offers 26 latest generation 3592 drives and currently offers an operational capacity of around 10PB which is, as the name suggests, online and available 24/7. Expansion frames and roadmapped advances in tape technology should allow this to reach 30-40PB over the next decade. The offsite tape library writes tapes for offsite copy and so has no need for extended storage and utilises 12 3592 drives of the same type as the onsite library. .

HFS 3494 Tape Robot Library