HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide
Table Of Contents
- HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide
- About this Guide
- 1- Planning a Subsystem
- Defining Subsystems
- What is Failover Mode?
- Selecting a Cache Mode
- Enabling Mirrored Caching
- What is the Command Console LUN?
- Determining Connections
- Assigning Unit Numbers
- What is Selective Storage Presentation?
- 2- Planning Storage Configurations
- Where to Start
- Determining Storage Requirements
- Configuration Rules for the Controller
- Addressing Conventions for Device PTL
- Choosing a Container Type
- Creating a Storageset Profile
- Planning Considerations for Storageset
- Changing Characteristics through Switches
- Specifying Storageset and Partition Switches
- Specifying Initialization Switches
- Specifying Unit Switches
- Creating Storage Maps
- 3- Preparing the Host System
- Installing RAID Array Storage System
- Making a Physical Connection
- Preparing LUNs for Access by Tru64 UNIX FileSystem
- DECsafe Available Server Environment (ASE)
- HSG80 Units and Tru64 UNIX Utilities
- Solution Software Upgrade Procedures
- New Features, ACS 8.7 for Tru64
- 4- Installing and Configuring HSG Agent
- 5- FC Configuration Procedures
- Establishing a Local Connection
- Setting Up a Single Controller
- Setting Up a Controller Pair
- Configuring Devices
- Configuring Storage Containers
- Assigning Unit Numbers and Unit Qualifiers
- Configuration Options
- Verifying Storage Configuration from Host
- 6- Using CLI for Configuration
- 7- Backing Up, Cloning, and Moving Data
- A- Subsystem Profile Templates
- Storageset Profile
- Storage Map Template 1 for the BA370 Enclosure
- Storage Map Template 2 for the second BA370 Enclosure
- Storage Map Template 3 for the third BA370 Enclosure
- Storage Map Template 4 for the Model 4214R Disk Enclosure
- Storage Map Template 5 for the Model 4254 Disk Enclosure
- Storage Map Template 6 for the Model 4310R Disk Enclosure
- Storage Map Template 7 for the Model 4350R Disk Enclosure
- Storage Map Template 8 for the Model 4314R Disk Enclosure
- Storage Map Template 9 for the Model 4354R Disk Enclosure
- B- Installing, Configuring, and Removing the Client
- C- SWCC Agent in TruCluster Environment
- SWCC Overview
- Running the SWCC Agent on a V4.0G Cluster
- Running the SWCC Agent under ASE Services
- Running the SWCC Agent on a V5.x Cluster
- Problems with Running the Agent on Multiple Clusters
- Configure the Controller
- Use Multiple-Bus Failover Mode
- Verify That the HSG80/HSG60 Unit Offsets Are Zero
- Install and Run the Agent on One Cluster Member
- Example of Installing the Agent on a Cluster Member
- Create the CAA Action Script
- Create the CAA Resource
- Glossary
- Index
Planning Storage Configurations
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Configuration Guide
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Figure 2–9: 5-member RAIDset using parity
RAIDsets are similar to stripesets in that the I/O requests are broken into smaller
“chunks” and striped across the disk drives. RAIDsets also create chunks of parity
data and stripe them across all the members of the RAIDset. Parity data is derived
mathematically from the I/O data and enables the controller to reconstruct the I/O data
if a single disk drive fails. Thus, it becomes possible to lose a disk drive without losing
access to the data it contained. Data could be lost if a second disk drive fails before the
controller replaces the first failed disk drive and reconstructs the data.
The relationship between the chunk size and the average request size determines if
striping maximizes the request rate or the data-transfer rates. You can set the chunk
size or use the default setting. See “Chunk Size,” page 2–30, for information about
setting the chunk size.
Keep these points in mind when planning RAIDsets
• Reporting methods and size limitations prevent certain operating systems from
working with large RAIDsets.
• Both cache modules must be the same size.
Virtual disk
Block 0
Block 1
Block 2
Block 3
Block 4
Block 5
etc.
Disk 1
Block 0
Block 5
Block 10
Block 15
Disk2
Block 1
Block 6
Block 11
Parity 12-15
Disk 3
Block 2
Block 7
Parity 8-11
Block 12
Disk 4
Block 3
Parity 4-7
Block 8
Block 13
Disk 5
Parity 0-3
Block 4
Block 9
Block 14
Operating
system
view
RAIDset
CXO6463B