Nvidia ForceWare Software User's Manual page 74

C 3
HAPTER
Using the NVIDIA MediaShield RAID Management Utility
Specific Migrating Requirements
The following table lists the disk requirements for a new RAID array for various
migrating combinations.
Table 3.1
From
RAID 0
RAID 1
RAID 0+1
RAID 5
i. m = quantity of disks in the new array. n = quantity of disks in the original array.
70
RAID Array Disk Requirements for Migrating
To New Array Disk Requirements
m > n
RAID 0
Number of disks in the new array must be greater than the original array.
m=2, n=1
RAID 1
RAID 1 array must include two disks, converted from a one disk RAID 0
array.
m >= 2 x n
RAID 0+1
Number of RAID 0+1 disks must be equal to or greater than twice the
number of RAID 0 disks.
m >= n + 1
RAID 5
No additional restrictions.
RAID 0
RAID 1 ** Not a valid combination **
RAID 0+1 No additional restrictions.
RAID 5 m >= 3
RAID 0 m >= n/2
Number of RAID 0 disks must be equal to or greater than half the number
of RAID 0+1 disks.
RAID 1 ** Not a valid combination **
m >= n + 2 ; where m must be an even number of disks.
RAID 0+1
The new array must include at least two more disks than the original
array, and can include any even number of disks beyond that.
RAID 5 m >= (n/2 + 1)
m >= n - 1
RAID 0
** Not a valid combination **
RAID 1
m >= 2 x (n - 1) ; where m is an even number of disks.
RAID 0+1
RAID 5 m >= n
i
MediaShield User's Guide – Version 4.0