Accusys eXpeRAID - Manual (Page 27)

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
Source
RAID Level
R0 R1 R5 R0+1 R6
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.