Dell POWERVAULT MD3600F User Manual

Configuration: Device Mapper Multipath for Linux 219
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Configuration: Device Mapper
Multipath for Linux
Overview
The MD3600f Series storage array uses a Linux operating system software
framework, known as Device Mapper (DM), to enable multipath capabilities
on Linux Host Servers. The DM multipath functionality is provided by a
combination of drivers and utilities. This chapter describes how to use those
utilities to complete the process of enabling an MD3600f Series storage array
on a Linux system.
NOTE: The Device Mapper technology replaces an earlier, proprietary technology,
known as MPP. MPP was used to enable multipathing for a previous MD
generation, the MD3000 Series of storage arrays.
NOTE: The required Device Mapper software components are installed on a Linux
host server by running the MD3600f Series Resource media installation program on
the server, and selecting either the Full or Host install option. For detailed
installation procedures, see the Dell PowerVault MD3600f and MD3620f storage
arrays Deployment Guide at support.dell.com/manuals.
Benefits of using DM Multipath include:
• Detects path failure and re-routes I/O to other available paths
• Revalidates failed paths after path restoration
• Utilizes multiple available paths to maximize performance
• Reconfigures path usage based on path states and error conditions
• Unifies multiple device nodes into a single logical multipath device node
• Indentifies a new multipathed LU and automatically configures a new
multipath node
• Provides device name persistency for DM devices under /dev/mapper/
book.book Page 219 Friday, September 23, 2011 2:46 PM

Dell POWERVAULT MD3600F Specifications

General

HDD speed	15000 RPM
RAID levels	0, 1, 5, 6, 10
Data transfer rate	8 Gbit/s
Storage drive size	3.5 \
Storage drive capacity	600 GB
Storage drive interface	Serial Attached SCSI (SAS)
Storage drives installed	Yes
Installed storage drive type	HDD
Supported storage drive types	HDD & SSD
Total installed storage capacity	3.6 TB
Maximum supported storage capacity	36 TB
Number of storage drives installed	6
Number of storage drives supported	12
Chassis type	-
Product color	Gray
LED indicators	Power, Status
AC input voltage	90-264 V
AC input frequency	47/63 Hz
Number of power supply units	1
Power supply unit (PSU) capacity	600 W
Operating altitude	-16 - 3048 m
Operating temperature (T-T)	10 - 35 °C
Operating relative humidity (H-H)	20 - 80 %

Weight and Dimensions

Depth	561 mm
Width	446.3 mm
Height	86.8 mm
Weight	29300 g