Справочник Пользователя для IBM Flex System V7000 Expansion Enclosure 4939H29

Chapter 12. Host Configuration 

Draft Document for Review January 29, 2013 12:52 pm

as “Other SCSI Disk Drives” and will not be recognized by SDDPCM. To correct the device 
type, hdisks will need to be deleted using rmdev -dl hdiskX and then cfgmgr will need to be 
rerun after the fileset is installed.

Perform the following steps to install the host attachment support package:

1. Access the following website:

http://www.ibm.com/servers/storage/support/software/sdd/downloading.html

2. Search for “Host Attachment for SDDPCM on AIX” in the “Downloads” tab.

3. Download the appropriate host attachment package archive for your AIX version; the fileset 
contained in the package is devices.fcp.disk.ibm.mpio.rte and devices.sddpcm.71.rte.

4. Follow the instructions that are provided on the website and the ‘README’ files to install.

The Subsystem Device Driver Path Control Module (SDDPCM) is a loadable path control 
module for supported storage devices to supply path management functions and error 
recovery algorithms. When the supported storage devices are configured as Multipath I/O 
(MPIO) devices, SDDPCM is loaded as part of the AIX MPIO FCP (Fibre Channel Protocol) 
or AIX MPIO SAS (serial-attached SCSI) device driver during the configuration.

The AIX MPIO device driver automatically discovers, configures and makes available all 
storage device paths. SDDPCM then manages these paths to provide:

•

 High availability and load balancing of storage I/O

•

 Automatic path-failover protection

•

 Concurrent download of supported storage devices licensed machine code

•

 Prevention of a single-point failure

The AIX MPIO device driver along with SDDPCM enhances the data availability and I/O load 
balancing of volumes provisioned by the IBM Flex System V7000 Storage Node.

Download the appropriate version of SDDPCM and install using the standard AIX installation 
procedure as shown in 12.5.4, “Installing the 2145 host attachment support package” on 
page 516. 

Check the driver ‘README’ file and make sure the AIX compute node meets all prerequisites. 
Example 12-7 on page 518 shows the appropriate version of SDDPCM downloaded into the 
/tmp/sddpcm/lpp directory. For our compute node we needed a combination of base level 
LPPs plus updates. At the beginning of Example 12-7 on page 518 these files are listed. 
From here we initiate the inutoc command, this generates a dot toc (.toc) file that is needed 
by the installp command prior to installing SDDPCM. We then initiate the installp command 
with the “p” preview option to ensure we have everything required.

# pwd           
/tmp/sddpcm/lpp 
# ls                                                  
devices.fcp.disk.ibm.mpio.rte  devices.sddpcm.71.rte  
devices.sddpcm.71.2.6.3.2.bff                         
# inutoc .                                                                      
# installp -acgp -d . devices.sddpcm.71.rte > preview.txt 2>&1