VERITAS Volume Manager 3.5 User's Guide - VERITAS Enterprise Administrator (June 2002)

Creating a Dynamic Volume
90 VERITAS Volume Manager User’s Guide - VEA
Mirrored
A concatenated or striped volume is mirrored (copied) on at least one other disk. If one of
the disks fails,data on thevolume can beaccessed from the survivingdisks. Concatenated
pro and striped pro volumes are layered and mirrored by default.
Layout: Choose Concatenated, Striped, Concatenated Pro, or
Striped Pro for the volume layout.
For a striped or striped pro volume, provide the following
information:
- In the Number of Columns field, specify the number of
columns (disks) across which the volume should be striped. A
striped volume requires at least two disks.
- To specify a stripe unit size other than the default, enter the
stripe unit size in the Stripe Unit Size field. To specify a size
unit, attach an s (sectors), k (kilobytes), m (megabytes), or g
(gigabytes) to the size.
Mirror Info: Select
Mirrored. In the Total Number of Mirrors field, enter the
total number of mirrors for the volume.
Options:
- To place a file system on the volume, click Create a file
system and specify the file system type and mount point in
the New File System dialog box.
- To enable Dirty Region Logging (DRL) for the volume, select
Enable Logging. VxVM adds an appropriate number of
logs to the volume.
- To clear the volume before enabling it for general use, select
Initialize Zero.
- To prevent the creation of a layered volume, select No
Layered Volumes. In caseswhere alayeredvolume layout is
appropriate, VxVM can create a layered volume when a
non-layered layout is specified. This option ensures that the
volume has a non-layered layout. If a layered (Pro) layout is
selected, this option is ignored.
Notes:
- A mirroredvolume requires at least twodisks. If logging is enabled, the volume requires
at least one additional disk.
- Only concatenated or striped volumes can be mirrored.