Accusys eXpeRAID manual Array Migration Matrix, R0 N Disks, R1 N Disks R5 N Disks, R0+1 N Disks

ACCUSYS, INC.

5F, 38 TAIYUAN ST, JHUBEI, HSINCHU, TAIWAN, R.O.C.

TITLE	EXPERAID COMMAND LINE INTERFACE USER GUIDE
PROJECT		“DESKTOP RAID”	DOCUMENT STATUS	OFFICIAL RELEASE
REV.	G–05-NOV-2007			PAGE 27 OF 27

Appendix I.

Array Migration Matrix:

Target
RAID Level	R0	R1	R5	R0+1	R6
Source
RAID Level
R0 (N Disks)		Can’t Migrate	≧N+1	≧2N	≧N+2
R1 (N Disks)	≧2		≧3	≧4	≧5
R5 (N Disks)	≧N-1	Can’t Migrate		≧2(N -1)	≧N/2+2
R0+1 (N Disks)	≧N/2	Can’t Migrate	≧N/2+1		≧N+1
R6 (N Disks)	≧N-2	Can’t Migrate	≧2(N-2)	≧N-1

Note: Most RAID levels can be migrated to other levels. The migration may require additional disk(s) to be added. The data capacity of the new array is equal to or larger than the original array. The variable 'N' represents the number of member disks in the "Source RAID" array.