AMCC 9650SE, 9550SX, 9500S, 9590SE manual Valid Migration Paths

Unit Object Commands

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Table 11: Valid Migration Paths

					Destination
Source	R0	R1	R5	R6	R10	R50	Single	JBOD	Spare
R0	Yes	No	Yes	Yes	Yes	Yes	No	No	No
R1	Yes	No	Yes	Yes	Yes	Yes	Yes	No	No
R5	Yes	No	Yes	Yes	Yes	Yes	No	No	No
R6	Yes	No	Yes	Yes	Yes	Yes	No	No	No
R10	Yes	No	Yes	Yes	Yes	Yes	No	No	No
R50	Yes	No	Yes	Yes	Yes	Yes	No	No	No
Single	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No
JBOD	No	No	No	No	No	No	No	No	No
Spare	No	No	No	No	No	No	No	No	No

disk=p:-p..consists of a list of ports (disks) to be used in addition to the source disks in the construction of the destination unit. One or more ports can be specified. Multiple ports can be specified using a colon (:) or a dash (-) as port index separators. A dash indicates a range and can be mixed with colons. For example disk=0:1:2-5:9:12indicates port 0, 1, 2 through 5 (inclusive), 9 and 12.

group=345678 indicates the number of disks per group for a RAID 50 type. (This attribute can only be used when type=raid50.) Recall that a RAID 50 is a multi-tier array. At the bottom-most layer, N number of disks per group are used to form the RAID 5 layer. These RAID 5 arrays are then integrated into a RAID 0. This attribute allows you to specify the number of disks in the RAID 5 level. Valid values are 3, 4, 5, 6, 7, and 8. For example group=3 indicates 3 disks of RAID 5 at the bottom layer of RAID 50.

Note that a sufficient number of disks are required for a given pattern or disk group. For example, given 6 disks, specifying 3 will create two RAID 5 arrays. With 12 disks, specifying 3 will create four RAID 5 arrays under the RAID 0 level. With only 6 disks a grouping of 6 is not allowed, as you would basically be creating a RAID 5.

The default RAID 50 grouping varies, based on number of disks. For 6 and 9 disks, default grouping is 3. For 8 disks, the default grouping is 4. For 10 disks, the default grouping is 5, and for 12 disks, the disks can be grouped into groups of 3, 4, or 6 drives (the group of 4 drives is set by default as it provides

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