HP StorageWorks Modular Smart Array 1000 HP StorageWorks 1000/1500 Modular Sma - Page 6

s, Tables, RAID 1, RAID 1+0 features .48

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Figures 1 Multiple physical drives (D1, D2, and D3) in a system 45 2 Multiple physical drives (D1, D2, and D3) configured into one logical drive (L1 45 3 Data striping (S1-S4) and data blocks (B1-B12) on multiple physical drives (D1, D2, and D3 45 4 Two arrays (A1, A2) containing five logical drives (L1 through L5) spread cross five physical drives (D1 through D5 46 5 RAID 1 array, with two physical hard drives (D1, D2 47 6 RAID 1+0 array, with eight physical hard drives (D1 through D8 47 7 RAID 5 array, with three physical hard drives (D1, D2, D3) showing distributed parity information (Px,y 48 8 RAID 6 array, with four physical hard drives (D1, D2, D3, D4) showing distributed parity information (Px,y)(Qx,y 49 Tables 1 Document conventions 7 2 CLI special keys 11 3 RAID 0 features 47 4 RAID 1, RAID 1+0 features 48 5 RAID 5 features 48 6 RAID 6 features 49 7 Summary of RAID methods 50 8 Choosing a RAID level 50 6

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Figures
1
Multiple physical drives (D1, D2, and D3) in a system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
2
Multiple physical drives (D1, D2, and D3) configured into one logical drive (L1) . . . . . . . . . . . . . . . . . 45
3
Data striping (S1-S4) and data blocks (B1-B12) on multiple physical drives (D1, D2, and D3). . . . . . . . 45
4
Two arrays (A1, A2) containing five logical drives (L1 through L5) spread cross five physical
drives (D1 through D5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5
RAID 1 array, with two physical hard drives (D1, D2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6
RAID 1+0 array, with eight physical hard drives (D1 through D8) . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7
RAID 5 array, with three physical hard drives (D1, D2, D3) showing distributed parity
information (Px,y) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
8
RAID 6 array, with four physical hard drives (D1, D2, D3, D4) showing distributed parity
information (Px,y)(Qx,y) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Tables
1
Document conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2
CLI special keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3
RAID 0 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4
RAID 1, RAID 1+0 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5
RAID 5 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6
RAID 6 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7
Summary of RAID methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8
Choosing a RAID level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50