Fujitsu P3AM-3842-05ENZ0 manual Logical Unit Recognition, Displaying the Recognized Logical Units

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Chapter 9 Logical Unit Recognition

At boot up, Linux automatically recognizes all SCSI disks and assigns them successive device names starting from "sda". When assigning the device names, any internal SCSI disks are assigned first, followed by the assignment of the ETERNUS DX Disk storage systems' LUNs. Example: If there is one internal SCSI disk, it is assigned a SCSI device name as follows:

SCSI device name

by-id name (Example)

Explanation

/dev/sda

/dev/disk/by-id/scsi-

Internal SCSI disk

36003005700ac3fc013746ef6315e42c4

 

 

 

 

 

 

/dev/disk/by-id/scsi-

 

 

3600000e00d0000000000042200000000

ETERNUS DX Disk storage

/dev/sdb or later

/dev/disk/by-id/scsi-

systems' LUN

 

3600000e00d0000000000042200010000

 

 

 

:

 

 

 

 

9.1Displaying the Recognized Logical Units

The driver version and information of each LUN's SCSI device name, etc. are displayed in the console message when Linux is booted up. Although this console message disappears soon from the screen, it can be re-displayed using the following command:

9.1.1For Red Hat Enterprise Linux

The driver version and information of each LUN's SCSI device name, etc. are displayed in the console message when Linux is booted up. Although this console message disappears soon from the screen, it can be re-displayed using the following command:

P3AM-3842-05ENZ0 ETERNUS DX Disk storage systems Server Connection Guide (Fibre Channel) for Linux

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Copyright 2010 FUJITSU LIMITED

 

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Contents Page Page Preface Contents and Structure of this Manual Safe Use of this Product AcknowledgmentsNaming Conventions Sles Other names Contents Chapter Logical Unit Recognition When the Multipath Driver is not Used WorkflowSet Up the Fibre Channel Switch WorkflowInstall the Fibre Channel Card Driver Connect the Server to the Eternus DX Disk Storage SystemsSet the Server to Recognize the Logical Units Create a File SystemWhen the Multipath Driver is Used Usable Multipath DriversInstall and Set Up ETERNUSmgr For Veritas Volume Install Eternus Multipath Driver or GR Setting Up and Checking the Multipath DriverInstall Veritas Volume Set up the device Mapper multipathServer OS Checking the Server EnvironmentServer Hardware Fibre Channel CardsDevice-mapper multipath Veritas Volume Manager VxVMEternus Multipath Driver or GR Multipath Driver Veritas Cluster ServerConnection Notes Scsi Devices and LinuxFibre Channel Switch Notes Server Startup and Power Supply Control NotesFibre Channel Card Notes Veritas Volume Manager VxVM Notes Design Sheet NotesVeritas Cluster Server VCS Notes Installing and Setting Up ETERNUSmgr Setting Up the Eternus DX Disk Storage Systems Setting the Fibre Channel Switches Installing and Setting Up the Drivers Connecting the Server to the Eternus DX Disk Storage Systems Logical Unit Recognition Displaying the Recognized Logical UnitsFujitsu For Suse Linux Enterprise Server Setting Up and Checking the Multipath Driver Setting Up the File System Procedure Obtain and apply the Change LUN State Utility Check the volume status
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