Installation guide

Configuration
Manual No. 771961 4-21
☛ Note
You can not change controller options if the controller
is running Mylex PCI firmware version 3.x or below!
In the Controller Options dialog box (Figure 4-22), you have the option to do
any of the following:
• Enable (by checking) or disable (by unchecking) any of the following
Global Parameters:
• Automatic Rebuild Management. Works in conjunction with SAF-
TE disk array enclosures to detect removal of a failed drive and
perform an automatic rebuild after installation of a replacement
drive.
• Active Negation. Recommended for cleaner SCSI signal transitions.
• Read Ahead. Reads data to the next stripe boundary (based on stripe
size) and retains in cache any data beyond the size of the actual read
request.
• Disconnect On First Command. Allows target to disconnect from
initiator.
• Background Initialization. Allows logical drive initialization to
take place “behind the scenes” so that the logical drive is
immediately available for use. If you disable this option, logical
drives will need to complete their initialization process before they
can be used.
• Change the default Rebuild Rate to less than or equal to 50.
A rate of 50 devotes the maximum allowable resources to a drive
rebuild or array expansion, allowing the Rebuild or Expand to proceed
at its fastest. Lowering the number devotes more resources to I/Os and
consequently slows the Rebuild or Expand Array process.
• Change any of the following Startup Parameters:
• Spin-up. Change if you do not want automatic drive spin-up. Other
choices are to spin up at power on, or to wait for a command and
then do an automatic drive spin-up.
• Devices Between Spins. Number of devices to spin up at one time.
A low number lessens the likelihood of a power drain.