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Sun Microsystems 440 Physical Disk Slot Numbers, Physical Device Names, and Logical Device Names

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Chapter 3 Managing Disk Volumes 57

only one device (the master) appears in the device tree. The mirrored device (the

slave) is invisible to the operating system, and is accessed only by the Ultra-4 SCSI

controller.

Caution – Creating or restoring a disk mirror destroys all data previously stored on

the hard drive.

Physical Disk Slot Numbers, Physical Device Names, and Logical Device Names

To perform a disk hot-swap procedure, you must know the physical or logical device

name for the drive that you want to install or remove. If your system encounters a

disk error, often you can find messages about failing or failed disks in the system

console. This information is also logged in the /var/adm/messages files.

These error messages typically refer to a failed hard drive by its physical device

name (such as /devices/pci@1f,700000/scsi@2/sd@1,0) or by its logical device

name (such as c1t1d0). In addition, some applications might report a disk slot

number (0 through 3).

You can use TABLE 3-1 to associate internal disk slot numbers with the logical and

physical device names for each hard drive.

▼ To Create a Hardware Disk Mirror

1. Verify which hard drive corresponds with which logical device name and physical

device name.

See “Physical Disk Slot Numbers, Physical Device Names, and Logical Device

Names” on page 57.

TABLE 3-1 Disk Slot Numbers, Logical Device Names, and Physical Device Names

Disk Slot Number Logical Device Name*

* The logical device names might appear differently on your system, depending on the number and type of

add-on disk controllers installed.

Physical Device Name

Slot 0 c1t0d0 /devices/pci@1f,700000/scsi@2/sd@0,0

Slot 1 c1t1d0 /devices/pci@1f,700000/scsi@2/sd@1,0

Slot 2 c1t2d0 /devices/pci@1f,700000/scsi@2/sd@2,0

Slot 3 c1t3d0 /devices/pci@1f,700000/scsi@2/sd@3,0

Contents

Main Page Contents Page Page Page Figures Page Tables Page Preface How This Book Is Organized Using UNIX Commands Shell Prompts Typographic Conventions Related Documentation AaBbCc123 Page Configuring the System Console Communicating With the System Page What the System Console Does Using the System Console Default System Console Connection Through the Serial Management and Network Management Ports Page Alternative System Console Configuration Accessing the System Console Through a Graphics Monitor Note About the sc> Prompt Note Access Through Multiple Controller Sessions Reaching the sc> Prompt OpenBoot ok Prompt Reaching the ok Prompt Graceful Shutdown ALOM System Controller break or console Command L1-A (Stop-A) Keys or Break Key Note Externally Initiated Reset (XIR) Caution Manual System Reset Caution Getting to the ok Prompt Caution To Get to the ok Prompt Switching Between the ALOM System Controller and the System Console Note Accessing the System Controller Using the Serial Management Port To Use the Serial Management Port Activating the Network Management Port Note To Activate the Network Management Port Accessing the System Console Through a Terminal Server To Access The System Console Through a Terminal Server Page Note Accessing the System Console Through a TIP Connection To Access the System Console Through the TIP Connection Note Modifying the /etc/remote File To Modify the /etc/remote File Note Accessing the System Console Through an Alphanumeric Terminal To Access the System Console Through an Alphanumeric Terminal Note Verifying Serial Port Settings on TTYB Note To Verify the Serial Port Settings on TTYB Accessing the System Console Through a Local Graphics Monitor To Access the System Console Through a Local Graphics Monitor Page System Console OpenBoot Configuration Variable Settings Page Managing RAS Features and System Firmware Note ALOM System Controller Note Logging In To the ALOM System Controller Note To Log In To the ALOM System Controller About the scadm Utility Note To View Environmental Information Note Controlling the Locator LED Note OpenBoot Emergency Procedures OpenBoot Emergency Procedures for Systems With Non-USB Keyboards OpenBoot Emergency Procedures for Systems With USB Keyboards Stop-A Functionality Stop-N Functionality To Restore OpenBoot Configuration Defaults Stop-F Functionality Automatic System Recovery Note Auto-Boot Options Note Error Handling Summary Note Reset Scenarios Automatic System Recovery User Commands Enabling and Disabling Automatic System Recovery To Enable Automatic System Recovery Note To Disable Automatic System Recovery Note Obtaining Automatic System Recovery Information Unconfiguring and Reconfiguring Devices To Unconfigure a Device Manually Page Note To Reconfigure a Device Manually Note Enabling the Hardware Watchdog Mechanism and Its Options To Enable the Hardware Watchdog Mechanism Multipathing Software Managing Disk Volumes Disk Volumes Volume Management Software VERITAS Dynamic Multipathing Sun StorEdge Traffic Manager Note RAID Technology Disk Concatenation RAID 0: Disk Striping RAID 1: Disk Mirroring RAID 5: Disk Striping With Parity Hot-Spares Hardware Disk Mirroring Caution Physical Disk Slot Numbers, Physical Device Names, and Logical Device Names To Create a Hardware Disk Mirror Page To Delete a Hardware Disk Mirror Page To Perform a Mirrored Disk Hot-Plug Operation Caution Note To Perform a Non-Mirrored Disk Hot-Swap Operation Page Page Page Note that c1t3d0 is now listed as configured. OpenBoot Configuration Variables Page Page Page Alarm Relay Output Application Programming Interface Page Page Page Page Page Index SYMBOLS A B C D E F G H L M N O P R S T U V X