Dell PowerEdge RAID
Controller Cards
H700 and H800
Technical Guide
Enterprise-class controllers designed for performance, reliability, and fault tolerance.
Dell
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, and OpenManage are trademarks of Dell, Inc. Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. Red Hat is a registered trademark of Red Hat, Inc. in the United States and other countries. Linux is a registered trademark of Linus Torvalds. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell disclaims proprietary interest in the marks and names of others.
©Copyright 2009–2011 Dell Inc. All rights reserved. Reproduction or translation of any part of this work beyond that permitted by U.S. copyright laws without the written permission of Dell Inc. is unlawful and strictly forbidden.
Revision 3 |
March 2011 |
DELL PERC H700 and H800 Technical Guide |
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Dell
Table of Contents
1 |
Product Comparison ........................................................................................... |
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1.1 |
Overview .................................................................................................. |
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1.2 |
PERC H700 Model Overview............................................................................. |
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1.3 |
PERC H800 Model Overview............................................................................. |
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New Features ................................................................................................... |
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2.1 |
New Feature Overview .................................................................................. |
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2.2 |
6Gb/s SAS (SAS 2.0) Overview.......................................................................... |
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2.2.1 |
6Gb/s SAS Performance Benefit over 3Gb/s SAS ............................................ |
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2.2.2 |
6Gb/s SAS Expectation .......................................................................... |
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Product Support .............................................................................................. |
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3.1 |
PowerEdge™ Server Support .......................................................................... |
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3.2 |
Management Software Support....................................................................... |
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3.3 |
Operating System Support ............................................................................ |
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3.4 |
Drive Support ........................................................................................... |
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Product Overview ............................................................................................ |
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4.1 |
PERC H700 and PERC H800 Feature Overview ..................................................... |
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4.2 |
CacheCade .............................................................................................. |
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4.3 |
Cut-Through IO ......................................................................................... |
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4.4 |
Reconfiguring Virtual Disks ........................................................................... |
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4.5 |
Fault-Tolerance Features ............................................................................. |
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4.5.1 |
Non-Volatile Cache............................................................................... |
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4.5.2 |
Automatic Replace Member with Predicted Failure......................................... |
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4.5.3 |
Redundant Path with Load Balancing Support ............................................... |
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4.5.4 |
Failed Physical Disk Detection ................................................................. |
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4.5.5 |
Using Replace Member and Revertible Hot Spares .......................................... |
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4.5.6 |
Enclosure Affinity ................................................................................ |
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4.5.7 |
Battery Back-up of Controller Cache .......................................................... |
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4.6 |
Physical Disk Hot Swapping ........................................................................... |
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4.7 |
Disk Roaming............................................................................................ |
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4.8 |
Disk Migration........................................................................................... |
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4.9 |
PERC H700 and H800 Security Key and RAID Management ....................................... |
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4.9.1 |
PERC H700 and H800 Security Key Implementation ......................................... |
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4.9.2 |
Configuring and Managing Secured RAID ...................................................... |
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4.10 |
Virtual Disk Write Cache Policies .................................................................... |
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4.11 |
Virtual Disk Read Cache Policies ..................................................................... |
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5 |
RAID Overview................................................................................................ |
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5.1 |
About RAID .............................................................................................. |
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5.2 |
Advantages of RAID .................................................................................... |
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5.3 |
Supported RAID Levels................................................................................. |
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5.3.1 |
RAID 0 (Striped Virtual Disk without Fault Tolerance)...................................... |
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5.3.2 |
RAID 1 (Mirroring) ................................................................................ |
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5.3.3 |
RAID 5 (Striping With Distributed Parity) ..................................................... |
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5.3.4 |
RAID 6 (Striping With Dual Distributed Parity) ............................................... |
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DELL PERC H700 and H800 Technical Guide |
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Dell |
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5.3.5 |
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RAID 10 (Striping over Mirrored Sets) ......................................................... |
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5.3.6 |
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RAID 50 (Striping Across RAID 5) ............................................................... |
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5.3.7 |
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RAID 60 (Striping Across RAID 6) ............................................................... |
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Appendix A. |
Additional Resources.......................................................................... |
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Tables |
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Table 1. |
Comparison of PERC H700 and PERC H800 to previous PERC 6/I and PERC 6/E .............. |
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Table 2. |
6Gb/s SAS (SAS 2.0) Features ..................................................................... |
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Table 3. |
SAS Performance Details ........................................................................... |
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Table 4. |
PowerEdge Server Support with PERC H700 and PERC H800 .................................. |
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Table 5. |
Operating System Support with PERC H700 and PERC H800 .................................. |
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Table 6. |
Drive Support ........................................................................................ |
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Table 7. |
PERC H700 and PERC H800 Features ............................................................. |
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Table 8. |
RAID Level Migration................................................................................ |
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Table 9. |
Resource Contact Information and Descriptions ................................................ |
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Figures |
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Figure 1. |
PERC H700 Integrated (Additional Sled for PCIe Slot) ........................................... |
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Figure 2. |
PERC H700 Modular ................................................................................... |
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Figure 3. |
PERC H800 Adapter ................................................................................... |
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Figure 4. |
Example of RAID 0 .................................................................................. |
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Figure 5. |
Example of RAID 1 (Mirroring) ..................................................................... |
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Figure 6. |
Example of RAID 5 (Single Virtual Disk with 5 drives).......................................... |
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Figure 7. |
Example of RAID 6 (Single Virtual Disk with 5 drives).......................................... |
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Figure 8. |
Example of RAID 10 (1 + 0) ........................................................................ |
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Figure 9. |
Example of RAID 50 (5 + 0) ........................................................................ |
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Figure 10. |
Example of RAID 60 (6 + 0) ........................................................................ |
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DELL PERC H700 and H800 Technical Guide |
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Dell
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 will be supported in PowerEdge 11th Generation servers. The PERC H700 is follow-on to the PERC 6/I, and the PERC H800 is the follow-on to the PERC 6/E.
Table 1. Comparison of PERC H700 and PERC H800 to previous PERC 6/I and PERC 6/E
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Feature/Spec |
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NEW |
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PERC 6/I |
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NEW |
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PERC 6/E |
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PERC H700 |
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PERC H800 |
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Interface |
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6Gb (SAS 2.0) |
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3Gb (SAS 1.1) |
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6Gb (SAS 2.0) |
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3Gb (SAS 1.1) |
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Bus support |
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x8 PCIe 2.0 |
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x8 PCIe 1.0 |
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x8 PCIe 2.0 |
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x8 PCIe 1.0 |
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Ports / Channels |
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8 (2 x4) |
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8 (2 x4) |
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8 (2 x4) |
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8 (2 x4) |
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2 internal |
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Int/Ext |
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2 internal |
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2 external |
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2 external |
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Connectors |
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512MB BBU 512MB |
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512MB TBBU |
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Cache Memory |
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Non-Volatile |
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256MB |
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512MB TNVC |
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256MB / 512MB |
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Cache |
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(667 MHz DDR2) |
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1GB TNVC |
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(667 MHz DDR2) |
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(800 MHz DDR2) |
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(800 MHz DDR2) |
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Yes |
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Yes |
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Battery-Backed |
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Yes |
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Yes |
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Cache |
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Transportable |
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Transportable |
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RAID Levels |
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0, 1, 5, 6, 10, 50, |
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0, 1, 5, 6, 10, 50, |
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0, 1, 5, 6, 10, 50, |
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0, 1, 5, 6, 10, 50, |
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60 |
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60 |
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60 |
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60 |
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Max physical |
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drives in Large |
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16 |
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10 |
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192 |
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144 |
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RAID volume |
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(8x MD1220) |
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(6x MD1120) |
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(R10, R50, R60) |
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HDD Support |
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SAS and SATA |
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SAS and SATA |
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SAS only |
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SAS and SATA |
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SSD Support |
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SAS and SATA |
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SATA |
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SAS only |
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Not Supported |
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SED Support |
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Yes (Local Key |
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Not Supported |
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Yes (Local Key |
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Not Supported |
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Management) |
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Management) |
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Controller |
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Firmware |
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7.1 |
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6.2 |
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7.1 |
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6.2 |
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(latest rev) |
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Redundant Path |
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No |
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No |
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Yes |
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Yes |
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I/O Load |
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No |
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No |
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Yes |
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Yes |
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Balancing |
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Cluster Support |
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No |
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No |
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No |
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No |
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Storage |
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OpenManage™ 6.2 |
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OpenManage™ 5.4 |
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OpenManage™ 6.2 |
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OpenManage™ 5.4 |
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Management |
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(minimum rev) |
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(minimum rev) |
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(minimum rev) |
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(minimum rev) |
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DELL PERC H700 and H800 Technical Guide |
5 |
Dell
1.2 PERC H700 Overview
The PERC H700 internal host-RAID product offers three different models to support 11th Generation Dell PowerEdge servers:
The PERC H700 Integrated card with two x4 internal mini-SAS ports supports the PCIe 2.0 x8 host interface. Cache options include standard 512 MB with battery backup unit (BBU), 512 MB non-volatile (NV) cache, or 1 GB non-volatile cache. The PERC H700 Integrated card is installed in the dedicated internal storage slot of the server. See Figure 1 for a view of the PERC H700 Integrated card.
The PERC H700 Adapter with two x4 internal mini-SAS ports supports the PCIe 2.0 x8 host interface. Cache options include standard 512 MB with BBU, 512 MB non-volatile cache, or 1 GB non-volatile cache. The PERC H700 Adapter is installed in a PCIe slot in the server. See Figure 1 for a view of the PERC H700 Integrated card (adapter version is the same with the addition of a sled for adhering to the PCIe slot connection).
The PERC H700 Modular card with one x4 internal SAS port and a BBU supports the PCIe 2.0 x4 host interface. The PERC H700 Modular card is installed in the integrated slot in the blade server platforms. See Figure 2 for a view of the PERC H700 Modular card.
Figure 1. PERC H700 Integrated (Additional Sled for PCIe Slot)
DELL PERC H700 and H800 Technical Guide |
6 |
Dell
Figure 2. PERC H700 Modular
1.3 PERC H800 Overview
The PERC H800 external host-RAID product is supported with 11th Generation Dell PowerEdge servers for expanding storage to the Dell™ PowerVault™ MD1200 and MD1220 6Gb/s SAS enclosures.
The PERC H800 Adapter with two x4 external mini-SAS ports supports the PCIe 2.0 x8 host interface. Cache options include the standard 512 MB transportable battery backup unit (TBBU) and the transportable 512 MB and 1 GB non-volatile cache. The PERC H800 Adapter is installed in a PCIe slot in the server. See Figure 3 for an angled view of the PERC H800 adapter.
DELL PERC H700 and H800 Technical Guide |
7 |
Dell
Figure 3. PERC H800 Adapter
DELL PERC H700 and H800 Technical Guide |
8 |
Dell
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
•Has a standard feature of 1 GB NV cache (PERC H700/H800)
The PERC H700 and PERC H800 continue to offer the following features:
•512 MB and 1 GB non-volatile cache (not supported on H700 modular)
oData retention in cache is extended from hours to years in the event of power interruption
oLarger cache size of 1 GB
•Cut-through IO (CTIO)
oPerformance boost of up to 2X IOPS performance
oOptimized for superior IOPS of SSDs over HDDs
oIdeal for small-block random workloads
oEasy to enable
•Physical disk power management
oConserve power by spinning down hot spares and unconfigured drives when not in use
oParameters are user-managed
•PCI-Express Gen2.0 support
•6Gb/s SAS (SAS 2.0) host interface
oDoubles the throughput performance
oSupport for Self Encrypting Drive (SED)—requires unique SED HDD part numbers
•New LSI 2108 ROC (Raid-on-Chip) with increased I/O processor (IOP) performance
•Increased internal drive support (up to 16 drives)
•SAS SSD support for specific 11th Generation Dell PowerEdge servers
•RAID volumes can be migrated from PERC 6/I, PERC 6/E, SAS 6/IR and PERC H200 controllers. Backwards migration is not supported.
•Change in Virtual Disk default read cache policy (The default VD read cache policy has been changed to Adaptive Read Ahead from No Read Ahead.)
•Display of expected and negotiated link rate for drives
The PERC H800 also offers the following features for PowerVault MD1200 and MD1220 enclosures:
•Increased capacity and scalability—up to 192 drives on one host-RAID controller
•Increased flexibility
o Mix of 2.5” (MD1220) and 3.5” (MD1200) enclosures behind a PERC H800
oMix of 2.5” and 3.5” drives in the MD1200
•SAS SSD support for Dell PowerVault MD1200 and MD1220 enclosures
•22-drive RAID-10 can be configured with PERC H800 in the CTRL-R BIOS utility
2.26Gb/s SAS (SAS 2.0) Overview
The 6Gb/s SAS 2.0 specification doubles the current 3Gb/s SAS data transfer rate. 6Gb/s SAS is designed for backward compatibility with 3Gb/s SAS and 3Gb/s SATA hard drives. Regardless of the drive speed, 6Gb/s controllers will deliver significant performance improvements in both read and write applications as compared to their 3Gb/s predecessors.
DELL PERC H700 and H800 Technical Guide |
9 |
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