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DELL PERC H700 and H800 Technical Guide 3
Table of Contents
1 Product Comparison ........................................................................................... 5
1.1 Overview .................................................................................................. 5
1.2 PERC H700 Model Overview ............................................................................. 6
1.3 PERC H800 Model Overview ............................................................................. 7
2 New Features ................................................................................................... 9
2.1 New Feature Overview .................................................................................. 9
2.2 6Gb/s SAS (SAS 2.0) Overview .......................................................................... 9
2.2.1 6Gb/s SAS Performance Benefit over 3Gb/s SAS ............................................ 10
2.2.2 6Gb/s SAS Expectation .......................................................................... 10
3 Product Support .............................................................................................. 11
3.1 PowerEdge™ Server Support .......................................................................... 11
3.2 Management Software Support....................................................................... 11
3.3 Operating System Support ............................................................................ 11
3.4 Drive Support ........................................................................................... 12
4 Product Overview ............................................................................................ 13
4.1 PERC H700 and PERC H800 Feature Overview ..................................................... 13
4.2 CacheCade .............................................................................................. 15
4.3 Cut-Through IO ......................................................................................... 15
4.4 Reconfiguring Virtual Disks ........................................................................... 15
4.5 Fault-Tolerance Features ............................................................................. 16
4.5.1 Non-Volatile Cache ............................................................................... 17
4.5.2 Automatic Replace Member with Predicted Failure ......................................... 17
4.5.3 Redundant Path with Load Balancing Support ............................................... 17
4.5.4 Failed Physical Disk Detection ................................................................. 17
4.5.5 Using Replace Member and Revertible Hot Spares .......................................... 17
4.5.6 Enclosure Affinity ................................................................................ 18
4.5.7 Battery Back-up of Controller Cache .......................................................... 18
4.6 Physical Disk Hot Swapping ........................................................................... 18
4.7 Disk Roaming ............................................................................................ 19
4.8 Disk Migration ........................................................................................... 19
4.9 PERC H700 and H800 Security Key and RAID Management ....................................... 19
4.9.1 PERC H700 and H800 Security Key Implementation ......................................... 19
4.9.2 Configuring and Managing Secured RAID ...................................................... 19
4.10 Virtual Disk Write Cache Policies .................................................................... 20
4.11 Virtual Disk Read Cache Policies ..................................................................... 20
5 RAID Overview ................................................................................................ 21
5.1 About RAID .............................................................................................. 21
5.2 Advantages of RAID .................................................................................... 21
5.3 Supported RAID Levels................................................................................. 21
5.3.1 RAID 0 (Striped Virtual Disk without Fault Tolerance) ...................................... 21
5.3.2 RAID 1 (Mirroring) ................................................................................ 22
5.3.3 RAID 5 (Striping With Distributed Parity) ..................................................... 23
5.3.4 RAID 6 (Striping With Dual Distributed Parity) ............................................... 24