Controlling An Hp Storageworks D2D Backup System Using Hp-Ux; Using Large Block Sizes With Hp-Ux 11I V2; Reviewing The Media In A Library - HP StorageWorks D2D Configuration Manual

The D2D Backup System supports NFSv3. To explicitly mount the D2D Backup System using NFSv3,
the following syntax should be used:
# mount –t nfs –o nfsvers=3 x.x.x.x:/<name of share> <local mount>
Controlling an HP StorageWorks D2D Backup System using
HP-UX
The HP StorageWorks D2D Backup System appears to the HP-UX operating system as a changer
device and Ultrium tape drive. The changer device represents the robotics within the library and can
be controlled from the console using a command called MC. The complete MC manual can also be
accessed using the command man mc.
The following examples illustrate how to complete common tasks with the HP StorageWorks D2D
Backup System.
• Review the media
• Load a cartridge into the tape drive
• Unload a cartridge from the tape drive
• Move a cartridge to the mail slot
• Move a cartridge from the mail slot

Using large block sizes with HP-UX 11i V2

A block size no larger than 256 KB (262144 bytes) is strongly recommended when working with
HP-UX 11i V2 and tape or VTL devices. Backup applications should be configured to work with I/O
block sizes that are no larger than 256 KB. Please check your application documentation to find out
how to check or configure block sizes used for transfers to and from tape or VTLdevices.
Block sizes no larger than 256 KB (262144 bytes) are recommended with HP-UX 11i V2 because,
by default, the HP-UX stape driver processes a block size larger than 256 KB by subdividing it into
256 KB blocks for writing to tape (giving a net effect of 256 KB I/O transfers). During restore, stape
attempts to reconstruct the original block size that was larger than 256 KB with the 256 KB blocks
from tape. This subdivision and subsequent reconstruction process of block sizes larger than 256 KB
adds unnecessary complexity and risk to tape positioning and restore operations and offers no net
gain in terms of increased block size. It should, therefore, be avoided.

Reviewing the media in a library

To verify the contents of the media slots within a library, the following command should be used:
# mc –p /dev/rac/c9t0d0 –rDSI
DT_slot_1 EMPTY
ST_slot_1:Full 72255101
ST_slot_2:Full 72255102
ST_slot_3:Full 72255103
ST_slot_4:Full 72255104
ST_slot_5:Full 72255105
ST_slot_6:Full 72255106
ST_slot_7:Full 72255107
ST_slot_8:Full 72255108
ST_slot_9:Full 72255109
ST_slot_10:Full 72255110A
ST_slot_11:Full 72255110B
38 HP-UX 11i V2/V3 (PA-RISC & IA64)