HP P3410A HP NetRAID Series User Guide - Page 96

Stripes, StrpSz, Drive-State, Enter, Advanced, Stripe Size, Write Policy, Read-Ahead, Cache Policy

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Chapter 4 HP NetRAID Express Tools 5. Press F10 to configure logical drives. The logical drive configuration window appears, as shown below: The window shows the logical drive that is currently being configured as well as any existing logical drives. The column headings are, from left to right: LD The logical drive number RAID The RAID level Size The logical drive size #Stripes The number of stripes (physical drives) in the associated physical array StrpSz The stripe size Drive-State The state of the logical drive 6. To set the RAID level for the logical drive, highlight RAID and press Enter. A list of the available RAID levels for the current logical drive appears. Select a RAID level and press Enter to confirm. 7. To set the logical drive size, move the cursor to Size and press Enter. By default, the logical drive size is set to all available space in the array(s) being associated with the current logical drive. • If you want to create more than one logical drive in an array, set a size of less than the actual capacity. • If you want the logical drive to span arrays, but you want it to span only two or three arrays, rather than the four-array maximum, set a size that reflects the number of arrays you want to span. 8. Open the Advanced menu to set the remaining options. • Stripe Size: This parameter specifies the size of the segments written to each disk in a RAID logical drive. • Write Policy: This option sets the caching method to Write-Back or Write-Through. • Read-Ahead: This option enables the SCSI Read-Ahead feature for the logical drive. You can set this parameter to Normal, Read-Ahead, or Adaptive. • Cache Policy: This parameter sets read cache operation during data transfers involving the selected logical drive. You can set this parameter to Cached IO or Direct IO. 90

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Chapter 4
HP NetRAID Express Tools
90
5.
Press
F10
to configure logical drives. The logical drive configuration
window appears, as shown below:
The window shows the logical drive that is currently being configured as
well as any existing logical drives. The column headings are, from left to
right:
LD
The logical drive number
RAID
The RAID level
Size
The logical drive size
#Stripes
The number of stripes (physical drives) in the associated
physical array
StrpSz
The stripe size
Drive-State
The state of the logical drive
6.
To set the RAID level for the logical drive, highlight
RAID
and press
Enter
. A list of the available RAID levels for the current logical drive
appears. Select a RAID level and press
Enter
to confirm.
7.
To set the logical drive size, move the cursor to
Size
and press
Enter
. By
default, the logical drive size is set to all available space in the array(s)
being associated with the current logical drive.
•
If you want to create more than one logical drive in an array, set a size
of
less
than the actual capacity.
•
If you want the logical drive to span arrays, but you want it to span
only two or three arrays, rather than the four-array maximum, set a size
that reflects the number of arrays you want to span.
8.
Open the
Advanced
menu to set the remaining options.
•
Stripe Size
: This parameter specifies the size of the segments written
to each disk in a RAID logical drive.
•
Write Policy
: This option sets the caching method to Write-Back or
Write-Through.
•
Read-Ahead
: This option enables the SCSI Read-Ahead feature for the
logical drive. You can set this parameter to Normal, Read-Ahead, or
Adaptive.
•
Cache Policy
: This parameter sets read cache operation during data
transfers involving the selected logical drive. You can set this
parameter to Cached IO or Direct IO.