System information

Using the RAID GUI
2-20
• Detailed disk group information
Click to display a complete list of disk group information. You will see the following details.
2.6.4 Logical disks
This feature allows you to create, delete, and modify your logical disk settings.
• Create logical disks
Click Create to add a new logical disk, where up to a maximum of 32 logical disks can be created in each DG. Specify the
following options for configuration.
Note
1. Progress rates increase in proportion to priority (i.e. A high priority task runs faster than a low
priority one.)
2. When there is no host access, all tasks (regardless of priority) run at their fastest possible
speed.
3. When host access exists, tasks run at their minimum possible speed.
• DG ID
• UUID
• Created Time and Date
• Disk Cache Setting
• LD Initialization Mode
• LD Rebuild Mode
• LD Rebuild Order
• Rebuild Task Priority
• Initialization Task Priority
• Utilities Task Priority
• Member Disk’s Layout
• Original Member Disks
DG ID Select a DG ID from the drop-down menu. This is the disk group to be assigned for
logical disk setting.
LD ID Select an LD ID from the drop-down menu.
Name Use the system default name as dgxldy. ‘x’ is the DG identifier and ‘y’ is the LD
identifier.
OR
Uncheck the ‘Use system default name’ box and enter the name in the Name field.
The maximum name length is 63 bytes.
RAID Level Select a RAID level for the logical disk. Different logical disks in a disk group can
have different RAID levels. However, when NRAID is selected, there must be no
non-NRAID logical disks in the same disk group.
Capacity (MB) Enter an appropriate capacity for the logical disk. This determines the number of
sectors a logical disk can provide for data storage.
Preferred Controller This option is only available when the redundant-controller system is in use. Select
the preferred controller to be in charge of managing and accessing the logical disk.
Stripe Size (KB) 4 / 8 / 16 / 32 / 64 / 128 / 256 / 512
The stripe size is only available for a logical disk with a striping-based RAID level. It
determines the maximum length of continuous data to be placed on a member disk.
The stripe size must be larger than or equal to the cache unit size.
Free Chunk Each free chunk has a unique identifier in a disk group, which is determined
automatically by the controller when a free chunk is created. Select a free chunk
from the drop-down menu for logical disk creation.
Initialization Option Noinit: No initialization process, and the logical disk can be accessed immediately
after it is created.
Regular: The controller initializes the logical disk by writing zeros to all sectors on
all member disks of the logical disk. This ensures that all data in the logical disks are
scanned and erased.
Background: The controller starts a background task to initialize the logical disk by
synchronizing the data stored on the member disks of the logical disk. This option is
only available for logical disks with parity-based and mirroring-based RAID levels.