VERITAS Volume Manager 4.1 Administrator's Guide

Understanding VERITAS Volume Manager
Volume Layouts in VxVM
Chapter 1 29
vulnerable to being put out of use altogether should a second disk fail
before the first failed disk has been replaced, either manually or by
hot-relocation.
Figure 1-20 How the Failure of a Single Disk Affects Mirrored-Stripe and
Striped-Mirror Volumes
Compared to mirrored-stripe volumes, striped-mirror volumes are more
tolerant of disk failure, and recovery time is shorter.
If the layered volume concatenates instead of striping the underlying
mirrored volumes, the volume is termed a concatenated-mirror volume.
Striped Plex
Striped-Mirror
Volume with
Striped Plex
Detached
Mirrored-Stripe
Volume with
X
X
Failure of Disk
Detaches Plex
Failure of Disk Removes
Redundancy from a Mirror
Striped Plex
no Redundancy
Partial
Redundancy