Mounting different drives on one partition Nick Tulley Physics & Nuclear Medicine City Hospital, Birmingham

Why? Making use of low cost large disk drives Enable the use of RAID storage Archiving ‘Report Screens’ for on-line access Organising data into ‘years’ for logical retrieval

Too many drives A large drive means a large index (CINDEX) These are very slow to load Split the data into YEAR drives! Use names: 2003, 2004 however... Seven years data on small disks Where is the study I’mlooking for? Mount ALL the drives

Yearly Archives Use drive names: 2003, 2004 Name of mount points limited: Name must start “img” Only 5 characters Use: /img03, /img04

Example Installation Three Gamma cameras Four Odyssey base stations Three acquisition stations One ‘data store’ (Linux)

Philips Odyssey Computer System Layout GEAxis Gamma Cameras Prism XP WatsonGinger Ernie Acquisition Stations Ollie Stan Reporting Stations Base Stations Fred EricHolmes Album (Linux) Remote RAID Disk Storage Data Storage

The basic set up Odyssey workstation (Unix) Remote Storage (Linux)

On the Linux system: Create a new directory for your data Create a mount point in the root directory Make it available to named remote computers On the Prism workstation: Create a new directory for the mount point Build the Clinical Index Tell disk manager about the new mount point Creating ‘Yearly Archives’

Logon as administrator [pwd needed]. su root Create the 'real' directory on large drive. mkdir -m 777 /imgdata/images1999 Create the mountable 1999 directory in root. mkdir -m 777 /img99 Forge a 'link' between them. mount --bind /img80/images1999 /img99 E.g. 1999: On Linux (1)

Change to /etc directory cd /etc Run 'vi' (or other) editor. vi exports Type a new line. /img99 eric(rw) Make the new directory available. exportfs -ra E.g. 1999: On Linux (2)

Logon as administrator [pwd needed]. su root Create the 1999 directory in root. mkdir -m 777 /img99 Logoff from root. exit Create the Clinical Index (CINDEX). cibuild -d /img99 E.g. 1999: On Prism (1)

Change to (home)/prism/site directory cd site Edit the SiteEnv file nedit SiteEnv Find the 'DISKLIST' entry Ctrl-F DISKLIST Add the new directory to the mount list #/album:/img99 Setenv DISKLIST “eric:/img4 # album:/img99 #” E.g. 1999: On Prism (2)

Can use large disk drives on other systems Currently tested for Linux Would work on Server 2003 (SFU needed) More secure data (RAID) Convenience of on-line Report Screens Splitting data into ‘years’ avoids large, slow Clinical Index Conclusion