Installation guide

Unit Object Commands

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The following table illustrates valid migration paths:

disk=p:-p.. consists of a list of ports or VPorts (disks) to be used, in addition

to the source disks, in the construction of the destination unit. You can specify

one or more ports. You can specify Multiple ports by using a colon (:) or a

dash (-) as port index separators. A dash indicates a range and can be mixed

with colons. For example disk=0:1:2-5:9:12 indicates port or VPort 0, 1, 2

through 5 (inclusive), 9 and 12.

group=3|4|5|6|7|8|9|10|11|12|13|14|15|16 indicates the number of disks per

group for a RAID 50 type. (You can only use this attribute when type=raid50.)

Note that a RAID 50 is a multitier 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 through 16. For

example group=3 indicates 3 disks of RAID 5 at the bottom layer of RAID

50.

Note: You can only migrate a unit to a RAID level that has the same or more

capacity as the existing one. You can migrate a four-drive RAID 5 unit to a four-drive

RAID 0, but you cannot migrate a four-drive RAID 0 unit to a four-drive RAID 5

unless you add another drive, due to the need for additional storage capacity for

parity bits.

Table 9: Valid Migration Paths

Source Destination

R0 R1 R5 R6 R10 R50 Single

Yes No Yes Yes Yes Yes No

Yes No Yes Yes Yes Yes Yes

Yes No Yes Yes Yes Yes No

R10

Yes No Yes Yes Yes Yes No

R50

Yes No Yes Yes Yes Yes No

Single

Yes Yes Yes Yes Yes Yes No

Spare

No No No No No No No