Adaptec Storage Manager - Manual (Page 168)

Appendix D: Understanding RAID ●
167
RAID 10 Logical Drives
A RAID 10 logical drive is built from two or more equal-sized RAID 1
logical drives. Adaptec RAID controllers support a maximum number
of 48 disk drives in a RAID 10 logical drive.
Data in a RAID 10 logical drive is both striped and mirrored. Mirroring
provides data protection, and striping improves performance.
Drive segment size is limited to the size of the smallest disk drive in the
logical drive. For instance, a logical drive with two 250 GB disk drives
and two 400 GB disk drives can create two mirrored drive segments of
250 GB, for a total of 500 GB for the logical drive, as shown below.
Disk Drive 1
Disk Drive 2
Disk Drive 3
Disk Drive 4
250 GB
250 GB
400 GB
400 GB
Disk Drives in Logical Drive
Disk Drive 1
Disk Drive 2
Disk Drive 3
Disk Drive 4
RAID 10 Logical Drive = 500 GB
1
2
1
2
Not Used
Not Used
3
4
3
4
500
499
500
499
...
...
...
...
Unused Space: 150 GB
Unused Space: 150 GB
Drive Segment Size (Smallest Disk Drive)