Complete this task to create arrays using the DS CLI commands.
The
machine type 1750 contains at least one storage enclosure, with a minimum
of four DDMs.
The DDMs of a storage enclosure are partitioned into array
sites. A machine type 1750 array site consists of
four DDMs in one storage enclosure of a storage enclosure pair, with two-to-eight
(four DDM) array sites per storage enclosure pair. All storage enclosure
pairs must have identical capacity, rpm, and interface characteristics, and
an interface to a common DA pair.
The creation of arrays is based on the array sites that are associated
with the storage unit. Use the lsarraysite and mkarray commands
to create the arrays.
You want to make an array from 1 or 2 array sites. An array inherits
the characteristics of its parent array sites and is given a RAID type attribute
(5 or 10). A 1750 array object of RAID type 5 or
10 is made from one or two (4 DDMs) array sites. The status of the array
is “unassigned” until the array is assigned to a rank.
Perform the following
steps to create an array from unassigned array sites:
- Issue the lsarraysite command to view a list of
array site IDs for all installed array sites. Review those arrays that are
designated with the state of unassigned. Enter the lsarraysite command
at the dscli command prompt with the following parameters and variables:
dscli>lsarraysite -dev storage_image_ID -state unassigned
Note: If
this is your first time creating fixed block volumes, all the arrays are displayed
with a state of unassigned.
- Press Enter. A report of unassigned array sites is displayed. Use
the list to identify unassigned array site capacity, rpm, and device adapter
(DA) pair attributes. Record the RAID type for each array site.
- Issue the mkarray command to create an array from either one or
two array sites with the status "unassigned". Enter the mkarray command
at the dscli command prompt with the following parameters and variables:
dscli>mkarray -dev storage_image_ID -raidtype [5 | 10] -arsite array_site
Consider
the following when you create the arrays:
- Specify one or two array sites with identical capacity,
rpm, interface, and DA pair attributes.
- The new array inherits the capacity, rpm, interface,
and DA pair characteristics of its parent array sites.
- The state of the array remains unassigned until it is assigned to a rank.
- Repeat Step 3 until all unassigned array sites have been
assigned to an array.
- Verify that the array-to-array site assignment is recognized
and complete by issuing either the lsarray or lsarraysite command
with the -l parameter.