Controlling An Hp Storeonce Backup System Using Hp-Ux; Using Large Block Sizes With Hp-Ux 1 1I V2; Reviewing The Media In A Library - HP StoreOnce B6000 Configuration Manual

Controlling an HP StoreOnce Backup System using HP-UX

The HP StoreOnce 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 StoreOnce 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 1 1i V2

A block size no larger than 256 KB (262144 bytes) is strongly recommended when working with
HP-UX 1 1i 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 1 1i 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
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
ST_slot_12:Full 72255110C
ST_slot_13:Full 72255110D
ST_slot_14:Full 72255110E
ST_slot_15:Full 72255110F
ST_slot_16:Full 722551110
ST_slot_17:Full 722551111
ST_slot_18:Full 722551112
ST_slot_19:Full 722551113
ST_slot_20:Full 722551114
ST_slot_21:Full 722551115
ST_slot_22:Full 722551116
ST_slot_23:Full 722551117
24 HP-UX 1 1i V2/V3 (PA-RISC & IA64)
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