Sun Microsystems 280R manual Hot-Plug Configuration Rules, Hot-Plug Device Information

Hot-Plug Configuration Rules

The following rules apply for your system:

■You must use Sun supported standard 3.5 inch wide and 1 inch high (8.89 cm x 2.5 cm) disk drives that are FC-AL compatible and run at 10,000 revolutions per minute (rpm).

■The FC-AL IDs for the disks are hardwired on the disk backplanes. There is no need to set any jumpers on the disk drives themselves. The FC-AL target address of each disk drive is determined by the slot location where the drive is connected to its FC-AL backplane.

■The internal disk drives share the internal FC-AL with the external FC-AL connector.

For information about implementing RAID configurations, see “About Disk Array Configurations and Concepts” on page 87. For information about implementing FC-AL configurations, see “About the Fibre Channel-Arbitrated Loop (FC-AL) and Port” on page 104.

Hot-Plug Device Information

In order to perform a disk hot-plug 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 your system console. This information is also logged in the /var/adm/messages file(s). These error messages typically refer to a failed disk drive by its physical device name (such as /devices/pci@1f,4000/pci@3/sd@b,0) or by its logical device name (such as c0t1d0). In addition, some applications may report a disk slot number (0 or 1).

You can use the following table to associate internal disk slot numbers with the logical and physical device names for each internal FC-AL disk drive.

Disk Slot	Logical Device	Physical Device
Number	Name	Name
Slot 0	c0t0d0	/devices/pci@8,600000/SUNW,qlc@4/fp@0,0/disk@0,0
Slot 1	c0t1d0	/devices//pci@8,600000/SUNW,qlc@4/fp@0,0/disk@1,0

For more information about FC-AL device names see “Internal Fibre Channel- Arbitrated Loop (FC-AL) Physical Disk Drive Name(s) Are Variable” on page 105.

Chapter 4 Hardware and Software Configuration 93