Contents
AIX AK April 2005 Forschungszentrum Karlsruhe
IBM Storage with Linux
Topics
What is supported
What Is Supported
IBM Storage Support for Linux
DS6000, DS8000 SLES8, SLES9, RH-EL
PLinux Support Disk
DS4000 SLES8, SLES9, RH-EL
LTO Sles 8, Sles 9, RH-EL
PLinux Support Tape
359x Sles 8, Sles 9, RH-EL
Parallel Scsi attachment also supported Advanced
Linux Scsi Subsystem
Everything is a file
Linux Device Addressing
Upper level
Design
Linux Kernel Version
Storage Changes in Linux Kernel
Still there
Wellknown Linux Scsi Limitations
Multiple LUN support of RH-EL DS4000 Specific
Other Problems and Pitfalls
ESS, DS6000, DS8000 Specific
Linux Kernel Limits
Large filesystems support
Multipathing Scenarios
Multipathing Concepts
LUN Transfer to Alternate Controller
Two multipathing solutions available
DS4000 transfers LUNs to alternate controller
LUN Thrashing Scenario
LUN Thrashing Scenario
LUN Thrashing Scenario
Multipathing with Rdac
Must run mppUpdate after each configuration change
Rdac Shared Data Scenario
Rdac Shared Data Scenario
Rdac Shared Data Scenario
DS6000 uses concept of preferred path
Preferred Path
SDD knows preferred path automatically
Preferred Path Shared Data Scenario
Preferred Path Shared Data Scenario
Preferred Path Shared Data Scenario
Preferred Path Shared Data Scenario
ESS and DS8000 have independent host ports
Host Ports Independent of Controller
Independent Host Port Shared Data Scenario
Independent Host Port Shared Data Scenario
Independent Host Port Shared Data Scenario
Tape Specifics
Daemon IBMtaped
IBMtape driver
IBMtapeUtil
Build and install using make Provides
For download as source code
Native
Use LTO Devices
3rd party applications
Native Library Management
Medium Changer Failover
One driver for all HBAs
Tape and Disk Connected to the Same HBA
Questions & Discussion
ESS / DS6000 / DS8000 Resources
DS4000 Resources
LTO Resources
Redbooks
White Papers
Legal Notices
