Table of Contents
On an ordinary Unix/Linux file system, a file's inodes and data are removed upon deletion. In Mass Storage, the inodes are removed; however, the data remains on tape until a "recycle" process is run. This means that any file which has been accidentally deleted, but which has had its inodes backed up and data written to tape, is potentially retrievable. Alternately, should you create a file then delete it prior to the backups, the file is lost. If the machine hosting Mass Storage crashes before the up-to-date data is copied to tape, you may lose that day's work.
To obtain assistance with recovery of a deleted Mass Storage file open a [ https://www.unc.edu/ar-bin/websub/index.pl ] Help Request ticket.
Recycling is done as needed. The need is determined by highwater marks in the Mass Storage software by available tape space and the number of slots available in the IBM tape library available to hold tapes. We can do a recycle automatically without notification.
Additional help
[ http://help.unc.edu/?id=6291 ] More on Mass Storage
[ http://its.unc.edu/research-computing.html ] Research Computing home page
Document Overview
Tags: cluster services, data storage, data warehouse, mass storage facility, research computing services, statistical computing, tape serviceSubjects: Mass Storage
Genre: Tutorial
Audience: Everyone
This work is licensed under a Creative Commons Attribution 3.0 United States License.
Copyright 2002-2007 The University of North Carolina at Chapel Hill.
This
work is licensed under a
Creative Commons Attribution 3.0 United States License.
