Overview

Both the Sun Ultra 450 workstation and the Ultra Enterprise 450 server can accommodate up to 20 internal UltraSCSI disk drives. Each drive is labeled with a disk slot number between 0 and 19.

In order to perform a disk hot-plug procedure, you must know the slot number of the faulty disk (0 through 19) and its logical device name (for example, c2t3d0). If you know the disk slot number, it is possible to determine the logical device name, and vice versa. It is also possible to determine both the disk slot number and the logical device name if you know the physical device name (such as /devices/pci@6,4000/scsi@4,1/sd@3,0). Physical device names are typically provided in SCSI error messages generated by software.

This chapter provides procedures for:

• Mapping from a SCSI error message to a disk slot number and UNIX logical device name

• Mapping from a UNIX logical device name to a disk slot number

• Mapping from a disk slot number to a UNIX logical device name

If you use Solstice(TM) SyMON(TM) software to monitor your Ultra Enterprise 450 server, there is no need to perform the following procedures. Solstice SyMON displays disk slot numbers together with physical and logical device names in its Physical View and Logical View consoles. For additional details, please see the Solstice SyMON User's Guide supplied with your version of Solstice SyMON.

The procedures in the chapter assume that the NVRAM parameter disk_led_assoc is correctly set to match the location of any PCI UltraSCSI controller cards that control the internal disk drives in your system. For additional details, see Chapter 1, Configuring Disk Slot Associations .