Mounting different drives on one partition
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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.

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Mounting different drives on one partition

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Mounting different drives on one partition

Mounting different drives on one partition

Nick TulleyPhysics & Nuclear Medicine

City Hospital, Birmingham


Mounting different drives on one partition

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

Too many drives

  • Seven years data on small disks

  • Where is the study I’mlooking for?

  • Mount ALL the 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...


Yearly archives

Yearly Archives

Use drive names: 2003, 2004

Name of mount points limited:Name must start “img”Only 5 characters

Use: /img03, /img04


Example installation

Example Installation

Three Gamma cameras

Four Odyssey base stations

Three acquisition stations

One ‘data store’ (Linux)


Mounting different drives on one partition

Remote

RAID

Disk

Storage

Fred

Holmes

Eric

Ollie

Data Storage

Stan

Watson

Ginger

Ernie

Album

(Linux)

ReportingStations

Prism XP

Axis

GE

Base Stations

AcquisitionStations

GammaCameras

Philips OdysseyComputer System Layout


The basic set up

The basic set up

Odyssey

workstation (Unix)

Remote Storage (Linux)


Creating yearly archives

Creating ‘Yearly Archives’

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 IndexTell disk manager about the new mount point


E g 1999 on linux 1

E.g. 1999: On Linux (1)

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 2

E.g. 1999: On Linux (2)

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 prism 1

E.g. 1999: On Prism (1)

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 2

E.g. 1999: On Prism (2)

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 #”


Conclusion

Conclusion

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


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