Veritas Storage Foundation Portable Data Containers: Cross-Platform Data Sharing 5.0.1 Administrators Guide, HP-UX 11i v3, First Edition, November 2009

■ loglen is set to a default value that
is based on disk group alignment.
■ maplen is set to a reasonable value.
If neither logmap_len nor loglen is
specified
■ For pre-version 110 disk groups,
maplen is set to zero.
■ For version 110 and greater disk
groups, maplen is set to use all the
bytes available in the on-disk map.
If only loglen is specified
■ For pre-version 110 disk groups,
logmap_len is not applicable.
■ For version 110 and greater disk
groups, maplen must be less than the
number of available bytes in the
on-disk map for the default log
length.
If only logmap_len is specified
Setting the DRL map length
To set a DRL map length
1
Stop the volume to make the DRL inactive.
2
Type the following command:
# vxvol -g diskgroup set [loglen=len-blocks] \
[logmap_len=len-bytes] volume
This command does not change the existing DRL map size.
Note the following restrictions
■ if logmap_len is greater than
loglen/2, vxvol fails with an
error message. Either increase
loglen to a sufficiently large value,
or decrease logmap_len to a
sufficiently small value.
■ The value of logmap_len cannot
exceed the number of bytes in the
on-disk map.
If both logmap_len and loglen are
specified
39Maintaining your system
Disk group tasks