Use the devices in a tape library for alternate initial program load (IPL) when they are attached to an I/O processor (IOP) and I/O adapter (IOA) in a position that supports an alternate IPL. To be used for alternate IPL, the devices must be set to the correct address.
For more information about the IOP and IOA positions and device addresses that support an alternate IPL, see Alternate IPL device.
You can use alternate installation for tape libraries that are attached to an IOP and IOA that is not in a position that supports alternate IPL.
For more information about using an alternate installation device, see Backup, Recovery and Media Services and Backup and Recovery.