Page 2 - Dell
Dell DELL PERC H700 and H800 Technical Guide 2 This document is for informational purposes only. Dell reserves the right to make changes without further notice to any products herein. The content provided is as is and without express or implied warranties of any kind. Dell, PowerEdge, PowerVault, an...
Page 3 - Table of Contents
Dell DELL PERC H700 and H800 Technical Guide 3 Table of Contents 1 Product Comparison ........................................................................................... 5 1.1 Overview .................................................................................................. 5 1.2 PE...
Page 4 - Tables
Dell DELL PERC H700 and H800 Technical Guide 4 5.3.5 RAID 10 (Striping over Mirrored Sets) ......................................................... 25 5.3.6 RAID 50 (Striping Across RAID 5) ............................................................... 26 5.3.7 RAID 60 (Striping Across RAID 6) ......
Page 5 - Product Comparison; Overview
Dell DELL PERC H700 and H800 Technical Guide 5 1 Product Comparison 1.1 Overview The PERC H700 (internal) and PERC H800 (external) RAID controllers mark the next stage in the evolution of the Dell™ PowerEdge™ RAID controller portfolio with the introduction of 6Gb/s SAS (SAS 2.0). PERC H700 and H800 ...
Page 6 - PERC H700 Integrated (Additional Sled for PCIe Slot)
Dell DELL PERC H700 and H800 Technical Guide 6 1.2 PERC H700 Overview The PERC H700 internal host-RAID product offers three different models to support 11 th Generation Dell PowerEdge servers: The PERC H700 Integrated card with two x4 internal mini-SAS ports supports the PCIe 2.0 x8 host interface...
Page 9 - New Features; CacheCade
Dell DELL PERC H700 and H800 Technical Guide 9 2 New Features 2.1 Overview The PERC H700 and PERC H800 offer the new CacheCade feature: • Produces cost-effective performance scaling for database-type applications • Offloads Random Reads to Dell-qualified Enterprise SSD configured as CacheCade SSD • ...
Page 10 - Gb/s SAS Performance Benefit over 3Gb/s SAS; SAS Performance Details; Gb/s SAS Expectation
Dell DELL PERC H700 and H800 Technical Guide 10 Other new features of the 6Gb/s SAS controllers will offer improved signal integrity and additional safeguards to enhance data protection with support for SED (Self-Encrypting Drive) technology. Table 2. 6Gb/s SAS (SAS 2.0) Features DAS-based Server St...
Page 11 - Product Support; Dell PowerEdge Server Support; PowerEdge Server Support with PERC H700 and PERC H800; Management Software Support
Dell DELL PERC H700 and H800 Technical Guide 11 3 Product Support 3.1 Dell PowerEdge Server Support The Dell PERC H700 and PERC H800 are supported with 11 th Generation Dell™ PowerEdge™ servers. Refer to Table 1 for the 11 th Generation PowerEdge servers that support the PERC H700 and PERC H800. For...
Page 12 - Operating System Support with PERC H700 and PERC H800; Operating System; Why Customers Should Insist on DELL; Hard Drives for; Drive Support
Dell DELL PERC H700 and H800 Technical Guide 12 Table 5. Operating System Support with PERC H700 and PERC H800 Supported Operating Systems Microsoft ® Windows Server ® 2003 Family Microsoft Windows Server 2008 Family Microsoft Windows Server 2008 R2 Red Hat ® Enterprise Linux ® Version 4 and Version...
Page 13 - Product Overview
Dell DELL PERC H700 and H800 Technical Guide 13 4 Product Overview 4.1 PERC H700 and PERC H800 Overview Table 7. PERC H700 and PERC H800 Features Feature PERC H700 Integrated/Adapter PERC H700 Modular PERC H800 Adapter RAID Levels 0, 1, 5, 6, 10, 50, 60 0, 1, 5, 6, 10 0, 1, 5, 6, 10, 50, 60 Ports 2 ...
Page 16 - RAID Level Migration; Fault-Tolerance Features; Non-volatile cache: extends data retention from hours to years
Dell DELL PERC H700 and H800 Technical Guide 16 Table 8. RAID Level Migration Source RAID Level Target RAID Level # of Physical Drives (Beginning) # of Physical Drives (End) Capacity Expansion Possible Description RAID 0 RAID 1 1 2 No Converting non-redundant virtual disk into a mirrored virtual dis...
Page 18 - Enclosure Affinity; Battery Management; Learn cycle discharge cycle: approximately three hours; Physical Disk Hot Swapping; The system backplane or enclosure must support hot swapping.
Dell DELL PERC H700 and H800 Technical Guide 18 being a ready hot spare. This allows hot spares to remain in specific enclosure slots. While the controller is reverting the hot spare, the virtual disk remains optimal. The controller automatically reverts a hot spare only if the failed drive is repla...
Page 19 - Disk Roaming; PERC H700 and H800 Security Key Implementation; Dell OpenManage Storage Management
Dell DELL PERC H700 and H800 Technical Guide 19 4.7 Disk Roaming The PERC H700 and H800 cards support moving physical disks from one cable connection or backplane slot to another on the same controller. The controller automatically recognizes the relocated physical disks and logically places them in...
Page 20 - Virtual Disk Write Cache Policies; Write-Through caching; It is; Virtual Disk Read Cache Policies; Always Read Ahead; —When selected, the controller begins using Read-Ahead if the two
Dell DELL PERC H700 and H800 Technical Guide 20 4.10 Virtual Disk Write Cache Policies The write cache policy of a virtual disk determines how the controller handles writes to that virtual disk. Write-Back and Write-Through are the two write cache policies and can be set on virtual disks individuall...
Page 21 - RAID Overview; About RAID; arrays; Advantages of RAID; Faster performance; Supported RAID Levels; RAID 0 (Striped Virtual Disk without Fault Tolerance)
Dell DELL PERC H700 and H800 Technical Guide 21 5 RAID Overview 5.1 About RAID RAID is a way of storing data on multiple independent physical disks for the purpose of enhanced performance and/or fault tolerance. The physical disks combine to make up what is called a virtual disk. This virtual disk a...
Page 22 - disk mirroring
Dell DELL PERC H700 and H800 Technical Guide 22 For example, a four-drive virtual disk may be configured with 16 stripes (four stripes of designated space per drive). Stripes A, B, C and D are located on corresponding hard drives 0, 1, 2, and 3. Stripe E, however, appears on a segment of drive 0 in ...
Page 23 - Advantages of RAID 1; Typically supports hot-swap disks; Disadvantages of RAID 1; RAID 5 (Striping With Distributed Parity); parity checking
Dell DELL PERC H700 and H800 Technical Guide 23 Figure 5. Example of RAID 1 (Mirroring) Advantages of RAID 1 High performance up to twice the read transaction rate of single disks, and the same write transaction rate as single disks 100 percent redundancy of data means no rebuild of data is nece...
Page 24 - RAID 6 (Striping With Dual Distributed Parity); Parity; parity
Dell DELL PERC H700 and H800 Technical Guide 24 Figure 6. Example of RAID 5 (Single Virtual Disk with 5 drives) Advantages of RAID 5 Most efficient use of drive capacity of all the redundant RAID configurations High read transaction rate Medium-to-high write transaction rate Disadvantages of R...
Page 26 - Requires 2n where n > 1 disks
Dell DELL PERC H700 and H800 Technical Guide 26 Figure 8. Example of RAID 10 (1 + 0) Advantages of RAID 10 RAID 10 has the same redundancy as RAID level 1 High I/O rates are achieved by striping RAID 1 segments Allows creation of largest RAID group with up to 192 drives connected to PERC H800 ...
Page 27 - Advantages of RAID 50; High read transaction rate; Disadvantages of RAID 50; Disk failure has a medium impact on throughput
Dell DELL PERC H700 and H800 Technical Guide 27 Figure 9. Example of RAID 50 (5 + 0) Advantages of RAID 50 Allows creation of largest RAID groups, up to 256 drives (theoretical; large RAID volumes are allowed for up to 192 drives connected to PERC H800) High read transaction rate Higher degree...
Page 28 - Advantages of RAID 60; One of the more complex RAID implementations
Dell DELL PERC H700 and H800 Technical Guide 28 Figure 10. Example of RAID 60 (6 + 0) Advantages of RAID 60 Allows creation of largest RAID groups, up to 256 drives (theoretical); large RAID volumes are allowed for up to 192 drives connected to PERC H800 High degree of fault tolerance due to 2 p...
Page 29 - Additional Resources; Resource Contact Information and Descriptions
Dell DELL PERC H700 and H800 Technical Guide 29 Appendix A. Additional Resources Table 9. Resource Contact Information and Descriptions Type Of Information URL Description PERC Resources http://www.dell.com/PERC Support matrix, whitepapers, and important links PERC Hardware Owner’s Manual http://sup...
