IBM System storage DS6000 Series, Attachment Manual

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2. Perform these steps to unconfigure MPIO devices and decide which disks to
remove:
a. Issue the following command, as a root user, from the command prompt:
lsdev -Cc disk
.
Attention: In the following example, the first two disks (16 Bit LVD SCSI
Disk Drive) hdisk0 and hdisk1 are the operating system disks (internal
SCSI disks) You must not remove them. Be aware that these numbers are
only examples and can be different on your system.
b. Use the following command to delete all MPIO disks: rmdev -dl hdiskX -R .
This command deletes the disk from the ODM including all child devices.
For example, rmdev -dl hdisk2 -R
Figure 38 shows an environment with only the internal disks. Be aware that
the disk numbers on your system can be different.
c. Now you can remove the devices.fcp.disk.ibm.mpio.rte file set. Open a
command line, as root user, and enter the following command: installp -u
devices.fcp.disk.ibm.mpio.rte . This command removes the MPIO file
set.
The NAS node is now prepared for the devices.fcp.disk.ibm.rte
installation.
3. Find the appropriate scripts on a CD that comes with your storage unit. You
can ask your storage unit administrator to get the CD or file sets. To download
the file sets from the Internet, go to the following Website:
http://www-1.ibm.com/servers/storage/support/software/sdd.html
4. Follow the link named 1750 host attachment scripts , then select 1750 Host
Attachment Script for SDD on AIX . This selection takes you to a Web page
where you can select AIX Host Attachment Script under the Download
column.
5. Download the devices.fcp.disk.ibm.rte.tar file from the Web page into the
following local directory on your NAS node: /usr/sys/inst.images
6. Change to this directory by using the cd /usr/sys/inst.images command.
Extract the downloaded devices.fcp.disk.ibm.rte.tar file with the tar -xvf
devices.fcp.disk.ibm.rte.tar command.
7. Create a new table of content file (.toc) by entering the following command:
inutoc . (this period is part of the command). This file is used later by the
installation procedure.
8. Run the install SMIT menu (with the fastpath) by entering the following
command: smitty install_latest . Specify the path (you can use a period (.)
</>-->lslpp -La | grep ibm1750
devices.fcp.disk.ibm.mpio.rte 1.0.0.0 C F IBM 1750 Host Attachment
</>-->_
Figure 37. Example of installed file set
</>-->lsdev -Cc disk
hdisk0 Available 1S-08-00-8,0 16 Bit LVD SCSI Disk Drive
hdisk1 Available 1S-08-00-9,0 16 Bit LVD SCSI Disk Drive
Figure 38. Example environment where all MPIO devices removed
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DS6000 Host Systems Attachment Guide