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

Chapter 3 47

Preparing Storage Devices

Preparing Tape and DDS Devices

conﬁgured to automatically allocate devices (autoreply) or when you are using multiple

backup devices.

NOTE

If auto reply is not enabled on the backup device designated, a reply from the

console is necessary to allocate that device for a STORE process. See Chapter 8,

"Handling Media Requests," for more information.

If you are using labeled tapes for your backup, you may or may not have to

respond to console requests, depending on how your system is conﬁgured.

Refer to the "Storing to Labeled Tapes" section in Chapter 5 for more

information on using labeled tapes.

The FILE command below assigns the ﬁlename BACKUP to the device with the device class

name TAPE.

:FILE BACKUP;DEV=TAPE

Using the backup device's logical device number is a more exact way to assign a ﬁlename

to a particular device. There is only one device deﬁned as LDEV 8 on your system.

However, several devices may be assigned the device class TAPE. When you use device

classes to name backup devices, STORE asks you to assign a logical device number to each

ﬁlename with a backup request.

FILE Commands for Automatically Allocated Devices

In order to have devices automatically allocated to the backup, you must assign a different

ﬁlename for each backup device allocated; use an LDEV number or a unique device class

for each FILE command you use, one for each device.

Refer to Chapter 8, "Handling Media Requests," for a description of automatically

allocated devices.

Multiple Tape Devices

All STORE and TurboSTORE products allow the use of multiple devices for backup.

Multiple devices are identiﬁed as a pool of available devices. When you store to multiple

devices, the devices must have similar characteristics; different device types are not

allowed. The device characteristics that must be identical are:

• Devices must be all local or all remote.

• All devices must have the same density.

• All devices must have the same record size.

• All backups must be either labeled or unlabeled; there cannot be a mix.

• Different types of backup devices cannot be used together in one backup. A backup

must be performed with only one type of backup device at a time. Note that different

models of DDS drives (i.e., SCSI or HPIB) can be mixed. Different models of magnetic

tape drives (7980, 7980XC, etc.) can also be used together.