STORE and TurboSTORE/iX Products Manual (B5151-90003)

36 Chapter3
Preparing Storage Devices
Preparation Process
Parallel Pools Requires more than two backup devices. Files are being stored to more
than one device at the same time. This is a combination of Sequential
and Parallel. When the media (tape or DDS) fills, additional files are
stored on the next device in line. You can set this up to have multiple
pairs of toggling devices.
3. Decide on the order that each backup device in the pool is to be used.
4. Assign each device a position in the backup, identifying each device by its logical device
(LDEV) number. Use the chart in Figure 3-1. as a tool to help you assign your device.
Sequential devices are numbered 1 through 8. Parallel devices are identified by the
letters A through P.
Write the LDEV numbers in the order and configuration that you plan to do the
backups. Note that the chart for parallel device pools shows only two sequential devices
in each parallel set. If you are using your devices in a different parallel pool
configuration, you should create your own chart and identify the position of each LDEV.
Figure 3-1. Multiple-Device Planning Chart