ORACLE - Exadata INTERLEAVED DISKS

 What is Exadata INTERLEAVED DISKS ?

                            By default, space for grid disks is allocated from the outer tracks to the inner tracks of a physical disk.However, space for grid disks can be allocated in an interleaved manner.Grid disks that use this type of space allocation are referred to as interleaved gid disks.

                            Interleaved grid disks are best used in situations where you want to create separate ASM disk groups that share cell disks without performance bias.

Note: ORACLE ACS setup griddisks without interleaving.

Example:
create celldisk all harddisk interleaving='normal_redundancy'
create griddisk all prefix=DATA, size=200M
create griddisk all prefix=RECO, size=200M
list celldisk CD_00_<cell_node> detail
name:                     CD_00_<cell_node>
comment:
creationTime:         2011-06-30T15:49:02-04:00
deviceName:           /dev/sda
devicePartition:       /dev/sda3
diskType:               HardDisk
errorCount:            0
freeSpace:              0
id:                          3aa2ddcc-0576-47e8-b1e5-c61ca64b3811
interleaving:         normal_redundancylun:                        0_0
physicalDisk:         L5LK38
raidLevel:              0
size:                      1832.59375G
status:                   normal