Technical data

Example 4-10: Creating the Storage Units (LUNs) (cont.)
MSA1000-1> ADD UNIT 5 RAID_LEVEL=1 DATA="DISK101 DISK102 DISK108 DISK109" SIZE=1MB
6
A unit cannot be smaller than 15MB.
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MSA1000-1> ADD UNIT 5 RAID_LEVEL=1 DATA="DISK101 DISK102 DISK108 DISK109" SIZE=15MB
6
MSA1000-1> ADD UNIT 6 RAID_LEVEL=1 DATA="DISK101 DISK102 DISK108 DISK109" SIZE=3GB 7
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MSA1000-1> ADD UNIT 7 RAID_LEVEL=1 DATA="DISK101 DISK102 DISK108 DISK109" SIZE=3GB
8
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1 Create the storage unit for the Tru64 UNIX disk. Disks are
identified by box and bay numbers. See Figure 1-1. Disk101 is in
box 1 (part of the MSA1000) in bay 1. Disk108 is in bay 8 of box 1.
Disk numbers must be enclosed in double quotes. You may select a
range of sequential disks, for example
DISK101-DISK104. You can
designate the LUN size by megabytes or gigabytes. You can also
designate stripe size (for example, STRIPE_SIZE=64) if the default
is not sufficient. The default stripe size for RAID0 and 1 is 128 KB.
The default stripe size for RAID5 and ADG is 16 KB.
The cache is enabled by default; you can disable it with
CACHE=DISABLE. Other choices for the RAID_LEVEL option are 0,
5, and advanced data guarding (ADG).
2 Displays the amount of free space left on the volume.
__________________ Note ___________________
If you ever need to determine the amount of free space
left on a volume, and did not record it when you added
the last storage unit, you have to add another storage
unit to the volume. There is no command to show
volume free space.
3 Create the storage unit for the cluster root (/) file system.
4 Create the storage unit for the cluster /usr file system.
5 Create the storage unit for the cluster /var file system.
6 Create the storage unit for the quorum disk. An attempt is made
to create a storage unit of 1 MB. The MSA1000 will not allow a
unit smaller than 15 MB.
4-16 Preparing the MSA1000 for TruCluster Server Use