Compaq ProLiant CL1850 Compaq ProLiant CL1850 Software User Guide - Page 45

blocks read ahead., of data that are read ahead in the cache. For example, 2 would equal

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3-14 Compaq ProLiant CL1850 Software User Guide Figure 3-10. Controller Properties window, General tab The General tab has the following properties. s System Name-Shows the system name as it is known by the operating system. s Failover Mode-Shows the failover mode selected: high performance (active/active), high availability (active/passive), or stand-alone (single controller). High availability is only available with two controllers. s Read-ahead cache limit-Enter the desired read-ahead limit (0-16). If you enter 0, the read-ahead is disabled. Each increment equals 32 blocks of data that are read ahead in the cache. For example, 2 would equal 64 blocks read ahead. s Controller mode-Shows the controller mode, which is active or unavailable. s Rebuild rate-Enter the desired rebuild rate, which ranges from 1 to 100. The controller rebuilds while it handles I/O activity. A rate below 50 emphasizes I/O response over the RAID rebuild. A rate above 50 puts a higher priority on the RAID rebuild at the expense of I/O activity.

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3-14
Compaq ProLiant CL1850 Software User Guide
Figure 3-10.
Controller Properties window, General tab
The General tab has the following properties.
■
System Name—Shows the system name as it is known by the operating
system.
■
Failover Mode—Shows the failover mode selected: high performance
(active/active), high availability (active/passive), or stand-alone (single
controller). High availability is only available with two controllers.
■
Read-ahead cache limit—Enter the desired read-ahead limit (0-16). If
you enter 0, the read-ahead is disabled. Each increment equals 32 blocks
of data that are read ahead in the cache. For example, 2 would equal
64 blocks read ahead.
■
Controller mode—Shows the controller mode, which is active or
unavailable.
■
Rebuild rate—Enter the desired rebuild rate, which ranges from
1 to 100. The controller rebuilds while it handles I/O activity. A rate
below 50 emphasizes I/O response over the RAID rebuild. A rate above
50 puts a higher priority on the RAID rebuild at the expense of I/O
activity.