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

40 Chapter3

Preparing Storage Devices

Preparing Tapes and DDSs

In the following example, STORE uses a total of four devices divided into two device pools.

:FILE PPA1;DEV=7

:FILE PPA2;DEV=8

:FILE PPB1;DEV=9

:FILE PPB2;DEV=11

:STORE @.OPERATOR.SYS;;STORESET=(*PPA1,*PPA2),(*PPB1,*PPB2)

If you gave the backup devices a single ﬁlename such as:

:FILE T;DEV=TAPE

enter the following STORE command to copy ﬁles to a set of parallel device pools:

:STORE @.@.@;;STORESET=(*T,*T),(*T,*T)

NOTE

Up to 16 parallel devices may be speciﬁed for one backup. With a serial device

pool, up to 8 devices may be speciﬁed.

When using a multiple-processor machine, you can see increased backup

performance when doing parallel backups, since each parallel device gets its

own process. A general rule for doing multi-processor parallel backups is to

use one less parallel set than you have processors. For example, on a 4-way

system, perform a 3-device parallel backup.

Preparing Tapes and DDSs

This section discusses preparing tape and DDS devices. Much of the information can also

be applied to storing to StorageTek devices, although some implementation details may

differ. If you are using disk devices for your backup, refer to the sections "Storing to Disk

Files" for more information on those devices.

You must select the backup media onto which you are going to store your ﬁles. If you have

followed the instructions for setting up a backup library in Chapter 2, "Managing Backups

and Backup Media," you should have a set of new or scratch backup media or both

available for storing ﬁles.

To prepare your backup media, perform the following steps:

1. Estimate the number of blank media you need, and take them from your library.

2. Attach a label to each unit of backup media. (A standard Hewlett-Packard tape label

has several headings for different types of important information. If your label does not

have such headings, you may want to create your own headings including the

information which is described next.)