Storage Foundation 7.4.1 Administrator's Guide - Linux

Setting default values for vxassist

The default values that the vxassist command uses may be specified in the file /etc/default/vxassist. The defaults listed in this file take effect if you do not override them on the command line, or in an alternate defaults file that you specify using the -d option. A default value specified on the command line always takes precedence. vxassist also has a set of built-in defaults that it uses if it cannot find a value defined elsewhere.

You must create the /etc/default directory and the vxassist default file if these do not already exist on your system.

The format of entries in a defaults file is a list of attribute-value pairs separated by new lines. These attribute-value pairs are the same as those specified as options on the vxassist command line.

See the vxassist(1M) manual page.

To display the default attributes held in the file /etc/default/vxassist, use the following form of the vxassist command:

# vxassist help showattrs

The following is a sample vxassist defaults file:

#  By default:
#  create unmirrored, unstriped volumes
#  allow allocations to span drives
#  with RAID-5 create a log, with mirroring don't create a log
#  align allocations on cylinder boundaries
    layout=nomirror,nostripe,span,nocontig,raid5log,noregionlog,
    diskalign
   
#  use the fsgen usage type, except when creating RAID-5 volumes
    usetype=fsgen
#  allow only root access to a volume
     mode=u=rw,g=,o=
     user=root
     group=root

#  when mirroring, create two mirrors
     nmirror=2
#  for regular striping, by default create between 2 and 8 stripe 
#  columns
     max_nstripe=8
     min_nstripe=2

#  for RAID-5, by default create between 3 and 8 stripe columns
     max_nraid5stripe=8
     min_nraid5stripe=3

#  by default, create 1 log copy for both mirroring and RAID-5 volumes
    nregionlog=1
    nraid5log=1

#  by default, limit mirroring log lengths to 32Kbytes
    max_regionloglen=32k

#  use 64K as the default stripe unit size for regular volumes
    stripe_stwid=64k

#  use 16K as the default stripe unit size for RAID-5 volumes
    raid5_stwid=16k