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Last Modified: Tuesday, 07-Aug-2012 10:34:32 EDT

Disk use and Filesystems on CSB Core computers

/csb/arc -- CSB Online archive

2007.10.04 to 2007.11.15 -- Temporary storage for raw synchrotron data

What's New, November, 2004

This remainder of this page is under revision, starting 2004.11.03

CSB Core Filesystems are maintained on central servers, and are available on almost all CSB-managed unix and linux computers. Many are also available on CSB-managed windows PCs. Core filesystems may be available on unix or windows computers in the individual labs.

Contents

User and group space, temporary storage, and common system disks.

Core-managed storage can be divided into three categories: User and group space, temporary storage, and common system disks.

User and group space

Users can create, store and use files in their home directories, or on filesystems owned and controlled by their lab group. These filesystems are automounted on most CSB computers.

Your Home directory is the directory you see when you log onto a unix or linux computer. It is also available to you as a networked drive on a windows system. All home directories can be found at /srv/people/username, where username is the name you use to login to your core account. You will be limited to a quota of 350MB on /srv/people (175MB before December 1, 2004).

Many CSB labs have additional storage in the CSB. These filesystems have names of the form /csb/group/disk, where group is the name or intitials of the PI, and disk is a name or number assigned by the group. Eaxmples would be /csb/tas/5 (one of the Steitz group's filesystems) and /csb/dme/granule, belonging to the Engelman group.

Temporary storage

/srv/frames is primarily for temporary storage of raw crystallographic data sets while they are being processed and backed up or restored to/from tape.

/srv/frames will remove files when they have not been accessed for 270 days. Creating, reading and writing files are all considered access. Although it is possible to artificially access files to simulate use, allowing semi-permanent occupation of space, this behavior is forbidden both by CSB policy and by a decent respect for the opinions of humankind.

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Obtaining additional group disk space

CSB groups can obtain space on the core disk server in increments of 20GB (usable). The cost is $250 per 20GB increment. The maximum size we support for a single filesystem is 80GB. Those CSB PIs whose grant paid for the server can get additional space at no charge.

The cost includes hardware RAID protection, daily online duplication of data (snapshot), regular backup and archiving to tape, redundancy of all major components, and access from unix/linux and windows systems.

To obtain space, see CSB staff.  

Removable Media

IEEE1394 Firewire and USB disks are supported on some Windows and Linux PCs in the Core. Click for further information.

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Last Modified: Tuesday, 07-Aug-2012 10:34:32 EDT


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