HP StorageWorks MSA1510i HP Storage Management Utility user guide (383075-002, - Page 40

drives that are assigned to one or more arrays, but are not active members of those arrays. If a spare

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3. Select the hard drives to include in the array. NOTE: • The SMU does not allow hard drives from SATA and SCSI storage enclosures to be included in the same array. • Hard drives included in an array should be the same size and speed. When drive sizes and speeds are mixed within an array, the usable capacity and the processing ability of the array is reduced to that of the smallest and slowest hard drive. • For optimum performance of an array, include hard drives from different storage enclosures and connected to different SCSI buses on the array controller. • Consider reserving some hard drives for use as on-line spares. • For more information about configuring storage arrays, see "Storage overview" on page 85. 4. When the display refreshes, verify that the newly configured array is shown in the component list. 5. Repeat Step 2 through Step 4 to configure additional arrays from any remaining unused hard drives. Assigning spare drives to an array HP recommends reserving some hard drives in your enclosures to be used as spare drives. Spares are drives that are assigned to one or more arrays, but are not active members of those arrays. If a spare is present and a physical drive in the array fails, the spare automatically replaces the failed drive as a member of the array unit, and the process of rebuilding the information onto the spare automatically begins. The system uses mirrored or parity information from the other member drives to reconstruct information onto the spare drive. After the failed drive is replaced, data on the spare is automatically copied to the replacement drive, and the spare is again available for use as a spare. 1. Select Array > Spare Management. 40 Configure

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3.
Select the hard drives to include in the array.
NOTE:
•
The SMU does not allow hard drives from SATA and SCSI storage enclosures to be
included in the same array.
•
Hard drives included in an array should be the same size and speed. When drive sizes
and speeds are mixed within an array, the usable capacity and the processing ability of
the array is reduced to that of the smallest and slowest hard drive.
•
For optimum performance of an array, include hard drives from different storage
enclosures and connected to different SCSI buses on the array controller.
•
Consider reserving some hard drives for use as on-line spares.
•
For more information about con
fi
guring storage arrays, see
“
Storage overview
” on page 85.
4.
When the display refreshes, verify that the newly con
fi
gured array is shown in the component list.
5.
Repeat
Step 2
through
Step 4
to con
fi
gure additional arrays from any remaining unused hard drives.
Assigning spare drives to an array
HP recommends reserving some hard drives in your enclosures to be used as spare drives. Spares are
drives that are assigned to one or more arrays, but are not active members of those arrays. If a spare
is present and a physical drive in the array fails, the spare automatically replaces the failed drive as a
member of the array unit, and the process of rebuilding the information onto the spare automatically
begins. The system uses mirrored or parity information from the other member drives to reconstruct
information onto the spare drive. After the failed drive is replaced, data on the spare is automatically
copied to the replacement drive, and the spare is again available for use as a spare.
1.
Select
Array
>
Spare Management
.
40
Con
fi
gure