View Drive Assignments; Create A Logical Drive - NEC SA2500 User Manual

User Guide

View Drive Assignments

From the Main Menu screen, press 1 to see the View Drive Assignments screen
This screen reports disk drive assignments and provides the following information:
■ Channel: ID – Shows the FastTrak Controller channel ID (1 through 4) to which a
particular disk drive is attached.
■ Drive Model – Identifies the manufacturer, model, and model number (if
applicable) of each disk drive.
■ Capacity (MB) – Reflects the capacity in MB (megabytes) of the disk drive.
■ Assignment – This field identifies the logical drive to which the disk drive
belongs. In the example above, there is one logical drive composed of three disk
drives. LD 1-2 means logical drive 1, disk drive 2.
Unassigned drives are labelled free and are considered hot spares to provide fault
tolerance. Unassigned drives may also be used to create a new logical drive at any
time.
■ Extent – An extent is a portion of the disk drive. The FastTrak SX Series
controller allows you to split the capacity of a disk drives between two logical
drives. The portion of a disk drive available to be used in a logical drive is called
an extent. The extent, or sum of two extents, is slightly smaller than the total
capacity of the disk drive.

Create a Logical Drive

1. From the Main Menu screen, press 2 to display the Define LD Menu.
2. Press the arrow keys to highlight an logical drive number you want to define
and press Enter to select it.
The Define LD Menu for the logical drive number you selected will next
appear.
3. Choose the RAID Level you want. In the Define LD Menu section, press the
Space bar to cycle through logical drive types:
■ RAID 0 (Stripe)
■ RAID 1 (Mirror)
■ RAID 5 (Block Striping with Distributed Parity)
■ RAID 10 (Stripe / Mirror)
■ JBOD (Single Drive)
4. Press the arrow keys to move to the next option. Option choices depend on the
RAID Level you selected.
■ Initialize logical drive, zero the disk drives. RAID 1, 5 or 10 only.
■ Stripe Block Size, the default 64KB is best for most applications.
■ Gigabyte Boundary, allows use of slightly smaller replacement drives.
■ Cache Mode, WriteThru or WriteBack.
98
www.nec-computers.com
.