System Administration Guide, Volume 1

Specifying the Default Density for a Tape Drive

Normally, you specify a tape drive by its logical unit number, which can run from 0 to n. The table below describes how to specify tape device names using default density settings.

Table 47-3 Specifying Default Densities for a Tape Drive

To Specify The ... 

Use ... 

First drive, rewinding 


First drive, nonrewinding 


Second drive, rewinding 


Second drive, nonrewinding 


By default, the drive writes at its "preferred" density, which is usually the highest density it supports. If you do not specify a tape device, the command writes to drive number 0 at the default density the device supports.