StorageTek Host Software Component 6 ユーザーズマニュアル

1st ed., 6/30/04 - 312579601

(including all commands used when automated mounts or dismounts are necessary) 
need to be issued after the LSMs are brought online. 

Note: ALL new control data sets (primary, secondary, and standby) must conform to the 
library hardware. 

Reconfiguration is I/O intensive. For this reason, it is highly recommended that you 
reduce the number of scratch volumes as much as possible to shorten reconfiguration time. 
Refer to “Minimizing I/O Time” on page 270 for more information. The following table 
details I/O requirements for various situations. 

Note: Shadowing is disabled during the reconfiguration process. If a new secondary CDS 
is used, the final step of reconfiguration copies the new primary to the new secondary. 

The quantities shown above represent most of the I/O done by reconfiguration. Depending 
on the ratio of cells to volumes, and nonscratch to scratch volumes, the number of scratch 
volumes can easily be the prime determinant of the number of I/O operations performed 
by Reconfiguration. 

For every volume in the old CDS that remains in the 

new CDS (volumes remain if their home panels have 
not been changed)

5

For every scratch volume in the old CDS that remains 

in the new CDS

38-58 additional

For every errant volume in the old configuration that 

remains in the new configuration

11 additional

For every cell in the old configuration that remains in 
the new configuration

1 additional

For every panel in the old configuration that remains 

in the new configuration

5 additional