Menu Bar
Menu Bar
Descriptions of the choices available from the Menu
Bar are as follows:
File The File pull-down menu contains the
following choices in the Information mode:
- Save Configuration Event Log: Select
this choice to save configuration event
information (such as the start time and
completion time for a rebuild operation)
to a file.
- Clear Configuration Event Log:
Select this choice to erase the event
information stored in the Configuration
Event Log.
- Exit: Select this choice to exit from the
ServeRAID Configuration Program.
View The View pull-down menu contains the
following choices in both the Information and
Configuration modes:
- Small Icons: This is the default setting.
When you select this choice, small icons
appear in the Main Tree on the left and
the Main Panel on the right.
- Large Icons: Select this choice to
display large icons in the Main Tree on
the left and the Main Panel on the right.
- Options: Select this choice to change
the Initialization and Synchronization
mode, as follows:
- Basic: This is the default setting.
When this mode is Enabled, the
configuration program automatically
initializes each new logical drive
and prevents access to the manual
initialization and synchronization
functions. This choice also forces
the synchronization of all new RAID
level-5 logical drives attached to
older ServeRAID adapter or
controller models that do not
support the auto-synchronization
feature.
- Advanced: When Enabled, this
choice lets you select to
automatically initialize new logical
drives and force the
synchronization of all new RAID
level-5 logical drives before exiting
the ServeRAID Configuration Program.
Attention If you disable Automatic
Initialization, the ServeRAID
Configuration Program will not
initialize each logical drive
(by writing zeros to the first 1024 sectors of the logical drive)
when it is created. You still must initialize all newly defined
logical drives before storing
data. If you disable the synchronization feature and the
level of firmware being used by the ServeRAID adapter or
controller does not support the auto-synchronization feature,
you still must synchronize all RAID level-5 logical drives
before storing data.
Actions All choices available from the Actions
pull-down menu also are available from the
pop-up lists that appear when you use the
right mouse button and click on the object in
the Main Tree.
The following choices appear on the Actions
pull-down menu when you select a
ServeRAID controller from the Main Tree:
- Configure the ServeRAID Controller:
This choice is available in the
Information mode only. It appears on
the pull-down menu when there are
Ready drives and logical-drive slots still
available for the ServeRAID controller.
- Configure for Clustering: This choice
is available in the Information mode
only. You can select this choice to
define the ServeRAID controller for use
in a high-availability, shared-disk cluster
environment. Detailed instructions for
using the clustering features are
provided in the IBM Netfinity
High-Availability Cluster Solution
Installation and User's Guide. You can
obtain a copy of this manual at the
following address
on the World Wide Web:
http://www.pc.ibm.com/netfinity/clustering
- Initialize the Controller Configuration:
This choice is available in both the
Configuration and Information modes.
Select this choice to delete the
ServeRAID controller configuration.
Attention After you initialize the controller
configuration, you will not have
access to any data stored on the
logical drives attached to the
selected ServeRAID adapter or
controller.
This choice deletes the existing configuration information, sets all
functional hard disk drives attached to the controller to the Ready state, and
deletes all logical drives defined for the controller.
This choice does not change any of the
ServeRAID adapter or controller settings
(such as the stripe-unit size, rebuild rate,
and so on) from their current or
customized values.
- Copy the Configuration from the Drives to the Controller:
This choice is available in the Information mode only, it copies the configuration
information stored on the hard disk drives to the ServeRAID controller. This
function is useful when you import previously configured drives from
another system, or when you replace
the ServeRAID adapter or controller.
- Disable or Enable Read-Ahead Cache Mode: These choices are available in
the Information mode only. When read-ahead cache is set to Enabled
(default setting), the ServeRAID controller transfers data from a disk to
its local cache in increments equal to the stripe-unit size. This provides
excellent overall performance when workloads are steady and sequential.
However, if the workload is random or the system I/O requests are smaller than
the stripe-unit size, reading ahead to the end of the stripe might degrade
performance. When read-ahead cache is set to Disabled, the ServeRAID
controller transfers data from a disk to local cache in increments equal to the
system I/O request size, without reading ahead to the end of the stripe.
- Change the Rebuild Rate: This choice
is available in the Information mode
only. You can select this choice to set
the priority for Rebuild operations to
High (default), Medium, or Low.
- When the rebuild rate is set to High, the rebuild I/O request gets
high priority in the execution order.
- When the rebuild request is set from High to Medium in a heavily
loaded system, it can increase the rebuild time, but provide better
system performance.
- When the rebuild request is set from High or Medium to Low in a
moderate to heavily loaded system, it can increase the disk rebuild
time, but provide better system performance.
- Change the Stripe-Unit Size: This choice is available
in the Information mode only.
Attention After you configure an array and
store data on the logical drives, you cannot change the stripe-unit size
without destroying data in the logical drives.
The stripe-unit size is the amount of data written on a given disk before
writing on the next disk. To maximize the overall performance, choose a size
that is close to the size of the system I/O request. You can set the stripe-unit
size to 8 KB, 16 KB, 32 KB, or 64 KB. When the stripe-unit size is 8 KB (the
default setting) or 16 KB, the maximum number of physical drives supported in
an array is 16. When the stripe-unit size is 32 KB or 64 KB, the maximum
number of physical drives supported in an array is eight.
(See 'Interleave Depth and Stripe-Unit Size' for more information.)
- Scan for New or Removed Ready Drives: This choice is available in the
Information mode only. When you select this choice, the configuration
program scans all channels on the ServeRAID controller for new or removed Ready drives.
The following choices appear on the Actions pull-down menu when you select the Arrays
icon or a specific array icon from the Main Tree:
- Create an Array: This choice appears in the Information
mode if you select the Arrays icon and Ready drives are available.
When you select this choice, the configuration program switches from the Information mode to the
Configuration mode.
- Delete All Arrays: This choice is available in the Information mode only.
It appears on the Actions pull-down
menu if you select the Arrays icon from
the Main Tree and arrays are defined for
the controller.
- Delete Array: This choice is available
in the Information mode only. It appears
on the Actions pull-down menu when
you select a specific array icon from the Main Tree.
The following choices appear on the Actions pull-down menu when you select the Logical
Drives icon or a specific logical drive icon from the Main Tree:
- Create a Logical Drive in Array: This choice appears on the Actions pull-down
menu in the Information mode if you select the Logical Drives icon and free
space is available in one or more arrays.
- Change Write-Cache Mode to Write Through or Write Back: These
choices are available in the Information
mode when you select a specific logical
drive icon from the Main Tree.
When this feature is set to the
write-through mode, the completion
status of a write command is sent after
the data is written to the hard disk drive.
Under certain workloads, you can
improve performance by changing this
setting to the write-back mode, where
the completion status of a write
command is sent after the data is copied
to cache memory, but before the data is
actually written to the storage device.
Attention
1. You might lose data if a power
outage occurs while using the
write-back mode without a
battery-backup cache device.
2. If you do not have a
battery-backup cache installed
and Enabled and you set this
feature to the write-back mode,
wait at least 10 seconds after
your last operation before you
turn off your system. Failure to
follow this practice can result in
lost data.
- Synchronize: This choice is available
in the Information mode when you select
a logical drive from the Main Tree and
the following conditions are both true:
- The ServeRAID adapter or controller does not support the
auto-synchronization feature.
- You previously selected Options from the View pull-down menu and
disabled the 'Synchronize all new RAID level-5 logical drives' setting.
Synchronizing a logical drive verifies that
the data redundancy for the logical drive
is correct. You must synchronize all
RAID level-5 logical drives before storing
data. (See 'Information Mode' for more information.)
- Initialize: This choice is available in the
Information mode when you select a logical drive from the Main Tree and you
previously selected Options from the View pull-down menu and disabled the
'Automatically initialize new logical drives' setting.
- Unblock the Logical Drive: This choice appears in the Information mode
when you select a specific logical drive that is in the Blocked state. You can
select this choice to change the Drive Access setting for the RAID level-0
logical drive from Blocked to Unblocked.
During a rebuild operation, the ServeRAID controller sets the state of
any RAID level-0 logical drives associated with a failed array to the
Blocked state.
After the Rebuild operation completes, you can unblock the RAID level-0 logical
drives, and access them once again.
However, the logical drive might contain damaged data.
You must either re-create, install, or restore the data from the most recent backup disk or
tape to the RAID level-0 logical drive.
The following choice appears on the Actions pull-down menu when you select a hot-spare
drive from the Main Tree:
- Remove from Hot-Spare State: This choice is available in the Information
mode only. Select this choice to remove a hot-spare drive from the configuration
and set the drive state back to Ready.
The following choices appear on the Actions pull-down menu when you select a physical
drive, a physical drive icon, or a SCSI channel icon from the Main Tree:
Help The following choices are available from the Help pull-down menu:
- Contents: Select this choice to access
the online Help facility. This choice is available in both the Information and
Configuration modes. Task-oriented Help is available from many of the
pop-up windows that appear during the configuration process, and, you also can
obtain context-sensitive Help by selecting an item and then pressing the F1 key.
- About: Select this choice to view the version number and copyright
information for the ServeRAID Configuration Program. This choice is available in both the
Information and Configuration modes.
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