Technical data

performed on the drive. Mirror status is not provided until after
the first write.
8
Lists the disks used by this LUN.
9 A list of spare disks assigned to this LUN.
10 The RAID level.
11 The stripe size.
12 The total capacity of this logical volume
9. When you create the unit with the ADD UNIT command, the unit
ID is automatically assigned to the LUN number as can be seen in
Example 4-12.
If you have, or plan on having, multiple MSA1000 storage systems being
accessed by your TruCluster Server member systems, set the unit ID
to ensure that you do not have any problems identifying them from
the Tru64 UNIX operating system.
____________________ Note _____________________
The unit ID is used by the wwidmgr utility to make the
device available to the console as a boot device, and shows
up as the IDENTIFIER during a Tru64 UNIX installation, or
when using the hwmgr view device command.
___________________ Caution ___________________
The hp StorageWorks modular SAN array 1000 user guide
provides examples of setting the unit ID to a sequence
of alphabetical characters. If you set the unit ID to any
non-numerical value, the wwidmgr utility will not recognize
the storage unit, and it will not be displayed as a valid device
for Tru64 UNIX software installation.
You can create a maximum of 32 LUNs, so you could change the unit IDs
for an MSA1000 in groups of 32 numbers. It will be easier to recognize
the LUNs if you change the unit IDs on those LUNs on the first
MSA1000 to numbers in the range 100 to 199. The LUNs on the second
MSA1000 could be assigned unit IDs in the range 200 to 299, and so on.
The unit IDs of the storage units created in Example 4-10 will be
changed to the unit IDs listed in Table 4-2 by the commands shown in
Example 4-13.
Preparing the MSA1000 for TruCluster Server Use 4-19