volume-config(4) File Formats volume-config(4)NAMEvolume-config - Solaris Volume Manager volume configuration information
for top down volume creation with metassist
SYNOPSIS
/usr/share/lib/xml/dtd/volume-config.dtd
DESCRIPTION
A volume configuration file, XML-based and compliant with the volume-
config.dtd Document Type Definition, describes the detailed configura‐
tion of the volume or volumes to be created, including the names, sizes
and configurations of all the components used in the volume or volumes.
This configuration file can be automatically generated by running
metassist with the -d option, or can be manually created.
The volume configuration file can then be used to either generate a
command file or to directly create volumes by running metassist and
specifying the volume configuration file as input to the command.
As a system administrator, you would want to change, manually create,
or edit the volume configuration file only if there are small details
of the configuration that you want to change. For example, you might
want to change names for volumes or hot spare pools, mirror read
option, or stripe interlace values.
It would be possible to also select different devices or change slice
sizes or make similar changes, but that is generally not recommended.
Substantial changes to the volume-config file could result in a poor or
non-functional configuration.
With a volume-config file, you can run metassist and provide the file
as input to the command to generate either a command file or to actu‐
ally set up the configuration.
Defining Volume Configuration
The top level element <volume-config> surrounds the volume configura‐
tion data. This element has no attributes. A volume configuration
requires exactly one <diskset> element, which must be the first element
of the volume configuration. Additionally, the volume-config can have
zero or more of the following elements: <disk>, <slice>, <hsp>, <con‐
cat>, <stripe>, <mirror> as required to define the configuration of
the volume to be created.
Defining Disk Set
Within the <volume-config> element, a <diskset> element must exist. The
<diskset> element, with the name attribute, specifies the name of the
diskset in which to create the volume or volumes. This element and
attribute are required. If this named disk set does not exist, it is
created upon implementation of this volume configuration.
Defining Slice
The volume configuration format provides for a <slice> element that
defines the name of a slice to use as a component of a volume. The
<slice> element requires a name attribute which specifies a full ctd
name. If the <slice> is newly created as part of the volume configura‐
tion, the startsector and sizeinblocks attributes must be specified. If
the slice was previously existing, these attributes need not be speci‐
fied.
Defining Hot Spare Pool
The volume configuration format provides for a <hsp> element that
defines the name of a hot spare pool to use as a component of a config‐
uration. The <hsp> element requires a name attribute which specifies a
hot spare pool name.
Slices defined by <slice> elements contained in the <hsp> element are
included in the hot spare pool when metassist creates it."
Defining Stripe
The <stripe> element defines stripes (interlaced RAID 0 volumes) to be
used in a volume. The <stripe> element takes a required name attribute
to specify a name conforming to Solaris Volume Manager naming require‐
ments. If the name specifies an existing stripe, no <slice> elements
are required. If the name specifies a new stripe, the <slice> elements
to construct the slice must be specified within the <stripe> element.
The <stripe> elements takes an optional interlace attribute as value
and units (for example, 16KB, 5BLOCKS, 20MB). If this value isn't spec‐
ified, the Solaris Volume Manager default value is used.
Defining Concat
The <concat> element defines concats (non-interlaced RAID 0 volumes) to
be used in a configuration. It is the same as a <stripe> element,
except that the interlace attribute is not valid.
Defining Mirror
The <mirror> element defines mirrors (RAID 1 volumes) to be used in a
volume configuration. It can contain combinations of <concat> and
<stripe> elements (to explicitly determine which volumes are used as
submirrors).
The <mirror> element takes a required name attribute to specify a name
conforming to Solaris Volume Manager naming requirements.
The <mirror> element takes an optional read attribute to define the
mirror read options (ROUNDROBIN, GEOMETRIC, or FIRST) for the mirrors.
If this attribute is not specified, the Solaris Volume Manager default
value is used.
The <mirror> element takes an optional write attribute to define the
mirror write options (PARALLEL, SERIAL, or FIRST) for the mirrors. If
this attribute is not specified, the Solaris Volume Manager default
value is used. The <mirror> element takes an optional passnum
attribute (0-9) to define the mirror passnum that defines the order in
which mirrors are resynced at boot, if required. Smaller numbers are
resynced first. If this attribute is not specified, the Solaris Volume
Manager default value is used.
EXAMPLES
Example 1: Specifying a Volume Configuration
The following is an example volume configuration:
<!-- Example configuration -->
<volume-config>
<!-- Specify the existing disk set to use -->
<diskset name="redundant"/>
<!-- Create slices -->
<slice name="/dev/dsk/c0t0d1s7" startsector="1444464" \
sizeinblocks="205632BLOCKS"/>
<slice name="/dev/dsk/c0t0d1s6" startsector="1239840" \
sizeinblocks="102816KB"/>
<!-- Create a concat -->
<concat name="d12">
<slice name="/dev/dsk/c0t0d0s7"/>
<slice name="/dev/dsk/c0t0d0s6"/>
<slice name="/dev/dsk/c0t0d1s7"/>
<slice name="/dev/dsk/c0t0d1s6"/>
<!-- Create (and use) a HSP -->
hsp name="hsp0">
<slice name="/dev/dsk/c0t0d4s0"/>
<slice name="/dev/dsk/c0t0d4s1"/>
<slice name="/dev/dsk/c0t0d4s3"/>
<slice name="/dev/dsk/c0t0d4s4"/>
</hsp>
</concat>
<!-- Create a stripe -->
<stripe name="d15" interlace="32KB">
<slice name="/dev/dsk/c0t0d0s7"/>
<slice name="/dev/dsk/c0t0d1s7"/>
<!-- Use a previously-defined HSP -->
<hsp name="hsp0"/>
</stripe>
<!-- Create a mirror -->
<mirror name="d10">
<!-- Submirror 1: An existing stripe -->
<stripe name="d11"/>
<!-- Submirror 2: The concat defined above -->
<concat name="d12"/>
<!-- Submirror 3: A stripe defined here -->
<stripe name="d13">
<slice name="/dev/dsk/c0t0d2s6"/>
<slice name="/dev/dsk/c0t0d2s7"/>
<slice name="/dev/dsk/c0t0d3s6"/>
slice name="/dev/dsk/c0t0d3s7"/>
</stripe>
</mirror>
</volume-config>
FILES
/usr/share/lib/xml/dtd/volume-config.dtd
SEE ALSOmetassist(1M), metaclear(1M), metadb(1M), metadetach(1M), metahs(1M),
metainit(1M), metaoffline(1M), metaonline(1M), metaparam(1M), metare‐
cover(1M), metareplace(1M), metaroot(1M), metaset(1M), metasync(1M),
metattach(1M), mount_ufs(1M), mddb.cf(4)
Solaris Volume Manager Administration Guide
SunOS 5.10 8 Aug 2003 volume-config(4)
