Chapter 3. IBM System Storage DS3500 Storage System planning tasks 81
Draft Document for Review March 28, 2011 12:24 pm 7914DS3KPlanning_090710.fm
requests from the logical drive. If a problem along the data path (such as a component failure)
causes an I/O to fail, the multipath driver issues the I/O to the alternate controller.
A multipath device driver is not required when the host operating system has its own
mechanism to handle multiple I/O paths.
Table 3-6 shows the DS3500 Storage System interoperability matrix of multipathing drivers.
Table 3-6 DS3500 Storage System interoperability matrix of multipathing drivers
3.6.5 Microsoft Windows MPIO
Microsoft Windows MPIO is a Driver Development Kit (DDK) from Microsoft for developing
code that manages multipath devices. It contains a core set of binary drivers, which are
installed with the DS3500 Device Specific Module (DSM) to provide a transparent system
architecture that relies on Microsoft Plug and Play to provide LUN multipath functionality as
well as maintaining compatibility with existing Microsoft Windows device driver stacks.
Windows
2003/2008
RHEL SLES AIX
5L™
V5.3
AIX
V6.1
HP-UX
11.23
HP-UX
11.31
DS3500 RDAC X X
MS Windows MPIO X
AIX MPIO X
a
a. Included in the operating system
b. Only supported on SLES 11 with the following required parts:
patch installed: lsi-scsi_dh_rdac-kmp-default-01.00_2.6.27.19_5-1
kernel upgraded to 2.6.31.5-0.16-default
DMM version: device-mapper-1.02.27-8.6
X
a
AIX SDDPCM X X
LVM (HP-UX) X X
SDD for HP-UX X
DMM for SLES 11 X
b
Note: The MPIO Driver is included in the Storage Manager software package for Windows
and supports Microsoft Windows 2003 and 2008 on 32-bit and x64 systems. In Windows
2008, MPIO is already part of the operating system.
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