VERITAS Volume Manager 3.5 Administrator's Guide

List of Figures

1-1 Physical Disk Example

1-2 How VxVM Presents the Disks in a Disk Array as Volumes to the Operating System

1-3 Example Configuration for Disk Enclosures Connected via a Fibre Channel Hub/Switch

1-4 Example HA Configuration Using Multiple Hubs/Switches to Provide Redundant-Loop Access

1-5 VM Disk Example

1-6 Subdisk Example

1-7 Example of Three Subdisks Assigned to One VM Disk

1-8 Example of a Plex with Two Subdisks

1-9 Example of a Volume with One Plex

1-10 Example of a Volume with Two Plexes

1-11 Connection Between Objects in VxVM

1-12 Example of Concatenation

1-13 Example of a Volume in a Concatenated Configuration

1-14 Example of Spanning

1-15 Striping Across Three Columns

1-16 Example of a Striped Plex with One Subdisk per Column

1-17 Example of a Striped Plex with Concatenated Subdisks per Column

1-18 Mirrored-Stripe Volume Laid out on Six Disks

1-19 Striped-Mirror Volume Laid out on Six Disks

1-20 How the Failure of a Single Disk Affects Mirrored-Stripe and Striped-Mirror Volumes

1-21 Parity Locations in a RAID-5 Model

1-22 Traditional RAID-5 Array

1-23 Volume ManagerRAID-5 Array

1-24 Left-Symmetric Layout

1-25 Incomplete Write

1-26 Example of a Striped-Mirror Layered Volume

1-27 Example of Decreasing the Number of Columns in a Volume

1-28 Example of Relayout of a RAID-5 Volume to a Striped Volume

1-29 Example of Relayout of a Concatenated Volume to a RAID-5 Volume

1-30 Example of Increasing the Number of Columns in a Volume

1-31 Example of Increasing the Stripe Width for the Columns in a Volume

1-32 Snapshot Creation and the Backup Cycle

1-33 Mirrored Volume with Persistent FastResync Enabled

1-34 Mirrored Volume After Completion of a Snapstart Operation

1-35 Mirrored Volume and Snapshot Volume After Completion of a Snapshot Operation

1-36 Resynchronizing the Original Volume from the Snapshot

3-1 How DMP Represents Multiple Physical Paths to a Disk as one Metanode

3-2 Example of Multipathing for a Disk Enclosure in a SAN Environment

4-1 Disk Group Move Operation

4-2 Disk Group Split Operation

4-3 Disk Group Join Operation

4-4 Examples of Disk Groups That Can and Cannot be Split

7-1 Example of Using Ordered Allocation to Create a Mirrored-Stripe Volume

7-2 Example of using Ordered Allocation to Create a Striped-Mirror Volume

7-3 Example of Using Concatenated Disk Space to Create a Mirrored-Stripe Volume

7-4 Example of Storage Allocation Used to Create a Mirrored-Stripe Volume Across Controllers

9-1 Example of Hot-Relocation for a Subdisk in a RAID-5 Volume

10-1 Example of a 4-Node Cluster

11-1 Example Implementation of Off-Host Processing

12-1 Use of Striping for Optimal Data Access

12-2 Use of Mirroring and Striping for Improved Performance