Silicon Graphics InfiniteStorage 4000 Series, Configuring And Maintaining, Page: 79 / 276

Chapter 4: Configuring a Storage Array 67

The priority for correcting the disk pool after it has entered a Degraded state is set
to high. If a condition occurs, such as a single drive failure, the storage
management software makes the correction of the condition a high priority.

The
securitytype
is enabled, so the storage management software uses only
drives that are configured to be security drives.

The type of drive to be used is a hard drive (hdd).

The disk pool uses only drives with protected data capability.
Creating Disk Pools
with User-Assigned
Drives
In some situations you might be required to create a disk pool by assigning the drives
to the disk pool instead of having the software assign the drives. One situation might
be when you want to create a small disk pool to test possible configuration
parameters. Another situation might be when you do not have enough drives with the
same characteristics to create a disk pool. If all of the useable drives in the storage
array do not have the same capacity you can still configure a disk pool by manually
selecting the drives. One constraint, however, is that each drive in the disk pool
assumes the same capacity as the smallest drive, even if the other drives have more
capacity.
The command to manually assign drives has this form:
create diskPool drives=( trayID1,drawerID1,slotID1 ...
trayIDN,drawerIDN,slotIDN

userLabel=" diskPoolName "

[driveCount= driveCountValue |

warningThreshold=( warningThresholdValue |default) |

criticalThreshold=( criticalThresholdValue |default) |

criticalPriority=(highest|high|medium|low|lowest) |

backgroundPriority=(highest|high|medium|low|lowest) |

degradedPriority=(highest|high|medium|low|lowest) |

securityType=(none|capable|enabled) |

driveMediaType=(hdd | ssd | allMedia | unknown) |

dataAssurance=(none|enabled)]
The
drives
parameter is a list of the drives that you want to use for the disk pool.
Enter the tray ID and the slot ID of each drive that you want to use. For high-capcity
drive trays that have drawers to hold the drives, also use the drawer number. For
high-capcity drive trays the sequence of the location identifiers is drive tray, drawer,
slot. Enclose the list in parentheses, separate the tray ID value, drawer ID value, and
the slot ID value of a drive with a comma, and separate each tray ID, drawer ID, and
slot ID set with a space. This example shows you how to enter tray ID values and slot
ID values for low capacity drive trays:
(1,1 1,2 1,3 1,4 1,5)
This example shows you how to enter tray ID values, drawer ID values, and slot ID
values for high capacity drive trays:
(1,1,1 1,2,3 1,3,5 1,4,6 1,5,8)