User Guide

38 Intel® Integrated RAID Solution User Guide
Valid controller number values are 0 to 255 (decimal).
• <Enclosure:Bay>
The enclosure and bay (or slot) of a peripheral device attached to the bus. The
argument must use a colon ( : ) as a separator and must follow the Enclosure:Bay
format. Enclosure is a 16-bit EnclosureHandle value set by the I/O controller
(IOC). A value of 0 is invalid. Bay/Slot is a 16-bit slot value set by the IOC. Use the
DISPLAY command to determine the enclosure number and slot number of a drive.
CREATE
The CREATE command creates Integrated RAID volumes on Intel SAS-3 controllers.
When you add a disk to an Integrated RAID volume, the volume might not use all of the
disk’s storage capacity. For example, if you add a 300-GB disk drive to a volume that only
uses 200 GB of capacity on each disk drive, the volume does not use the remaining 100
GB of capacity on the disk drive.
The disk identified by the first Enclosure:Bay on the command line becomes the primary
disk drive when you create an Integrated Mirroring (RAID 1) volume. If the controller
resynchronizes the disk drives, the data on the primary disk drive becomes available when
you access the newly created volume.
When the IR firmware creates a RAID 1 volume, it starts a background initialization of
the volume. Use the
STATUS command to monitor the status of the initialization.
The following restrictions and defaults apply when you create Integrated RAID volumes
and hot spare disks:
• All disks that are part of a volume, including hot spares for that volume, must be
connected to the same Intel SAS-3 controller.
• The supported RAID levels are RAID 0, RAID 1, RAID 1E, and RAID 10.
• You can create a maximum of two Integrated RAID volumes per Intel SAS-3
controller.
• The maximum and minimum disk drives per RAID level are as follows:
— RAID 0: Max = 10; Min = 2.
— RAID 1: Max = 2; Min = 2.
— RAID 1E: Max = 10; Min = 3.
— RAID 10: Max = 10; Min = 3.
• SAS3IRCU does not permit you to create an Integrated RAID volume that combines
SAS and SATA hard disk drives.
• SAS3IRCU does not permit you to create an Integrated RAID volume that combines
solid-state drives (SSDs) and hard disk drives.
• SAS3IRCU supports disk drives with 512-byte sectors and disk drives with 4-KB
sectors. However, an Integrated RAID volume must use all 512-byte-sector drives or
all 4-KB-sector drives. You cannot combine the two types of drives in a single
Integrated RAID volume.