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45Understanding Veritas Volume Manager
Volume layouts in VxVM
Figure 1-19 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.
RAID-5 (striping with parity)
Note: VxVM supports RAID-5 for private disk groups, but not for shareable disk
groups in a cluster environment. In addition, VxVM does not support the
mirroring of RAID-5 volumes that are configured using Veritas Volume
Manager software. Disk devices that support RAID-5 in hardware may be
mirrored.
You need a full license to use this feature.
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