Intel SRCMR, User Manual

Page: 43 / 180

Getting Started 43
How to Use Auto Hot Plug with SAF-TE
The following describes the auto hot plug option of the Intel RAID Controller SRCMR software.
Auto hot plug provides for the insertion of new disks into a system. The way a new disk is used
can be different depending on the conditions under which it was inserted. If the system has a
degraded array and a disk is hot plugged into the system, the new disk will be used to rebuild the
degraded array. If a system had a degraded array and used one of the available hot fix disks to
rebuild and then a disk was hot plugged, the new disk will become a hot fix disk replacing the post
of the one being used in the array.
Setting Up Auto Hot Plug
Enable SAF-TE on the enclosure. Note: It is possible to have auto hot plug without a SAF-TE
enclosure, but that setup is completely different from that described here.
The Intel RAID Controller SRCMR configures devices in the SAF-TE enclosure. The controller
identifies drives as being connected to the SAF-TE backplane and responds appropriately to
requests by the SAF-TE device.
Verify the configuration in the Enclosure Slot Configuration menu.
1. Select the Configure Physical Devices while in the Advanced Setup mode.
2. Highlight the SAF-TE processor and press <Enter>.
3. Select the Enclosure Slot Configuration option.
4.
The Enclosure Slots screen is displayed. It shows what drives have been identified in which
slots of the enclosure. Pressing <Enter> once configures the drives; drive information appears
on the page. Pressing <Enter> again removes the drive configuration information from the
page. All devices that are to be hot spare replaceable should have information in their
respective slots. The lack of drive configuration information indicates the absence of a hot
spare. Once the drives have been configured, they are auto hot spare ready.
Note that disks can only be replaced in positions that have been configured for a device. If
there is a degraded array on a controller, and a user plugs in a drive in one of the slots not in use
in the enclosure, the drive will not become available to the system.
If no disks in a volume (array) creation are configured, a message: “Do you want to configure
the selected disks for SAF-TE Auto Hot Plug? (Y/N)” appears. If even one disk of the intended
array is configured, this message will not appear. However, only the configured disks are auto
hot pluggable.