VERITAS Storage Foundation 4.1 Cross-Platform Data Sharing Administrator's Guide

Disk Tasks
22 VERITAS Storage Foundation CDS Administrator’s Guide
◆ Displaying Device Quotas for CDS Disk Groups
◆ Creating CDS Disk Groups Using vxdg split
◆ Default Activation of Shared Disk Groups
◆ Additional Considerations When Importing CDS Disk Groups
Disk Tasks
The following disk tasks are supported:
◆ Changing the Default Disk Format Setting
◆ Restoring CDS Disk Labels
Changing the Default Disk Format Setting
When disks are put under VxVM control, they are formatted with the default cdsdisk layout.
This happens during the following operations:
◆ Initialization of disks
◆ Encapsulation of disks with existing partitions or slices (Linux and Solaris systems)
◆ Conversion of LVM disks (AIX, HP-UX and Linux systems)
You can override this behavior by changing the settings in the system defaults files as described in
“Defaults Files” on page 17. For example, you can change the default format to sliced for disk
initialization by modifying the definition of the format attribute in the
/etc/default/vxdisk defaults file. To change the default format for disk encapsulation or
LVM disk conversion, change the definition of the format attribute in the
/etc/default/vxencap defaults file.
Restoring CDS Disk Labels
CDS disks have three labels:
◆ Platform block
◆ AIX coexistence label
◆ HP coexistence/VxVM ID block
There are also backup copies of each. If any of the primary labels become corrupted, VxVM will
not bring the disk online and user intervention is required.