HP P3410A HP NetRAID Series User Guide - Page 62

Format Option, Rebuild Option, Check Consistency Option

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Chapter 3 HP NetRAID Config Format Option Choose the Format option to low-level format one or more physical drives. Since most SCSI disk drives, including all HP drives, are low-level formatted at the factory, this step is usually not necessary. You typically must format a disk only if: • The disk drive was not low-level formatted at the factory. • There is an excessive number of media errors detected on the disk drive. You do not need to use the Format option if you simply want to erase existing information on your SCSI disks, such as a DOS partition. That information is erased when you choose the Initialize menu selection to initialize the logical drive(s). You cannot format a drive that is online. Rebuild Option Choose the Rebuild option to rebuild one or more failed disk drives. For complete information on rebuilding drives, see "Rebuilding Data" in Chapter 5 in this guide. Check Consistency Option Ensures that parity or mirroring is correct for the selected drives. RAID levels 3, 5, 30, and 50 use parity data blocks to ensure redundancy; parity is checked between these parity data blocks and the selected drives. RAID levels 1 and 10 use duplicate data drives (mirroring); the duplicate data is verified. If Check Consistency finds any errors, it fixes the inconsistencies. This selection both identifies problems and takes corrective action. Check Consistency should be run if the system shuts down irregularly, such as if the system hangs or suffers a power failure. It is also recommended that you run consistency checks every two to four weeks to ensure that bad blocks on the disk drive are mapped out. When you choose Check Consistency, the parameters of the existing logical drives on the current adapter appear. The logical drives are listed by number. 1. Press the arrow keys to highlight the desired logical drives. 2. Press the Spacebar to select or deselect a drive for consistency checking. Press F2 to select or deselect all the logical drives. 3. Press F10 to begin the consistency check. A progress indicator for each selected logical drive appears. 56

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Chapter 3
HP NetRAID Config
56
Format Option
Choose the Format option to low-level format one or more physical drives.
Since most SCSI disk drives, including all HP drives, are low-level formatted at
the factory, this step is usually not necessary. You typically must format a disk
only if:
•
The disk drive was not low-level formatted at the factory.
•
There is an excessive number of media errors detected on the disk drive.
You do not need to use the Format option if you simply want to erase existing
information on your SCSI disks, such as a DOS partition. That information is
erased when you choose the Initialize menu selection to initialize the logical
drive(s).
You cannot format a drive that is online.
Rebuild Option
Choose the Rebuild option to rebuild one or more failed disk drives. For complete
information on rebuilding drives, see "Rebuilding Data" in Chapter 5 in this guide.
Check Consistency Option
Ensures that parity or mirroring is correct for the selected drives. RAID levels 3,
5, 30, and 50 use parity data blocks to ensure redundancy; parity is checked
between these parity data blocks and the selected drives. RAID levels 1 and 10
use duplicate data drives (mirroring); the duplicate data is verified. If Check
Consistency finds any errors, it fixes the inconsistencies. This selection both
identifies problems and takes corrective action.
Check Consistency should be run if the system shuts down irregularly, such as if
the system hangs or suffers a power failure. It is also recommended that you run
consistency checks every two to four weeks to ensure that bad blocks on the disk
drive are mapped out.
When you choose Check Consistency, the parameters of the existing logical drives
on the current adapter appear. The logical drives are listed by number.
1.
Press the arrow keys to highlight the desired logical drives.
2.
Press the
Spacebar
to select or deselect a drive for consistency checking.
Press
F2
to select or deselect all the logical drives.
3.
Press
F10
to begin the consistency check. A progress indicator for each
selected logical drive appears.