Raid 10 Logical Drives - Adaptec Storage Manager User Manual

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
250 GB
Disk Drive 2
250 GB
Disk Drive 3
400 GB
Disk Drive 4
400 GB
Disk Drives in Logical Drive
Appendix D: Understanding RAID
Drive Segment Size (Smallest Disk Drive)
Disk Drive 1
1
3
Disk Drive 2
2
4
1
Disk Drive 3
3
Not Used
2
Disk Drive 4
4
Not Used
RAID 10 Logical Drive = 500 GB
499
...
500
...
499
...
Unused Space: 150 GB
500
...
Unused Space: 150 GB
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