Chemistry Faculty and Students:

Due to limited funds and limited space on the servers, each user account has a print quota for each semester and a limit on how much hard drive space it can have. When your printing units in the lab nears the semesterly quota, an email will be sent to you. Once you surpass the quota, printing privileges will be lost. In order to purchase more printing units you will have to fill out a deposit form with amount, depositor and signature. Then bring the form and the money to the cashiers office. Bring your receipt to Shane and he will reactivate your printing privileges.

The print quotas are:

• Undergraduate: $7.50 / semester.
• Graduate: $10.00 / semester.

The Chemistry department has what is called a RAID Array for storage of computer files. This device is a Redundant Array of Inexpensive Drives configured in such a way so that if one of the hard disk drives fails there will be no interruption what so ever. The system can continue to provide file storage services even while a failed drive is replaced.

The entire array is backed up nightly onto Mammoth Exabyte 2 tapes using the modified Tower of Hanoi algorithm. If something catastrophic should happen to our array we can restore files from tape backup. If something catastrophic should happen to the server room where everything, including the backup tapes, are destroyed we can restore from monthly backups which are not kept in the Chem Sci building.

The disk space in our array is finite and since it is shared by everyone there is a need to limit space per user. We have a system installed that nightly checks to see if people are within the limits. Should you go over the limit you will be sent email notifying you. You will be given at least 5 business days (M-F) to take care of your files. If you are still over the limit after the alotted days then your account will be deactivated until we can work something out. Note: your files are not deleted, you simply won't be able to log in. Accounts will not be deactivated on weekends. See the Systems Administrator if you need help in reducing your disk space usage.

Steps for Reducing Disk Usage
Sometimes people don't even realize they are using an exorbitant amount of disk space. That is why running 'top10' will help you see where you need to focus your attention on. Often an application a user regularly uses saves temporary files or log files somewhere within the user's home drive. These files eventually push a user over his/her disk usage limit.

Guidelines:
1) Delete what you don't need.
2) Compress what you want to keep but may not use for months or years to come.
3) Move to other media, such as CDROMs, those files you may never need while at the university but simply don't want to delete.

Compression Utilities
Unix: gzip
PC: zip