Air Cleaner User Manual

IBM 7332 4mm Tape Library
The 7332 is a low-cost tape drive providing fast 4mm tape write performance,
while allowing unattended operation of a tape autoloader. When configured for
use with SysBack, either 4 internal or 12 external tapes can be written to
sequentially without user intervention.
To do so, create a sequential virtual device containing the single 4mm tape drive
and indicate that an autoloader is used. Any backups performed to this tape drive
automatically span across as many tape cartridges are in the magazine without
user intervention.
Other Tape Libraries or Autoloaders
Most tape libraries, or autoloaders, that have a “sequential mode” can be used
with SysBack. “Sequential Mode” indicates that the tape loader itself automatically
inserts a new cartridge each time a cartridge is ejected from the drive. The tape
cartridges are usually inserted in sequential order, depending on their location in
the unit, but some loaders allow the user to select the order in which the tapes will
be used.
To use SysBack with an autoloader, create a sequential virtual device containing
the tape drive (not the loader itself), and indicate in the virtual device
configuration that an autoloader is used. Then, set the autoloader to sequential
mode.
By not using any device-specific loader controls, SysBack can work with virtually
any tape loader set in sequential mode. SysBack does not control the loader in any
way. Instead, SysBack rewinds and ejects the current tape from the drive any time
a read or write operation reaches end of tape and waits for the loader to insert the
next volume. Upon doing so, the backup continues automatically without user
intervention.
Because libraries or loaders can differ, SysBack cannot claim to support every
loader, as the sequential operation is the function of the loader and not of SysBack.
It is therefore up to the user to perform the steps to properly configure the loader
and verify the proper operation of the sequential mode as described above.
For information related to enabling SysBack to execute your own customer scripts
to manipulate the robotic mechanism of your library, please refer to“End of Tape
(EOT) Processing Options” on page 16-23.
IBM 7133 Serial Storage Architecture (SSA) disk subsystem
The serial storage architecture provides a high-speed interconnection technology
for SSA disk drives. The drives and cables are hot-plugable, which enables a disk
drive to be replaced while the unit is operational. Also, the location within the
loop is transparent to AIX, enabling a disk not currently in use to change locations
without affecting the operation of the system.
Because AIX does not keep track of the physical location of the disk drive, it is not
possible for SysBack to record and later reference a disk by its physical location.
Instead, SysBack keeps track of the physical volume ID, which is unique to each
individual disk drive. When you recreate a volume group on the same physical
disks as they were previously installed, all disks are recognized and automatically
added to the volume group. However, when you clone systems or replace a drive,
Appendix E. Device/System-Specific Information E-3