Sun Microsystems Enterprise 250 Owner's Manual page 73

interleaved parity) are all supported. You can also configure drives as "hot spares."
For more information on RAID configurations, see "About Disk Array
Configurations and Concepts" on page 189.
The "hot-plug" feature of the system's internal disk drives allows the removal and
installation of drives while the system is operational. This capability significantly
reduces system down-time associated with disk drive replacement.
The hot-plug procedure involves software commands for preparing the system prior
to removing a disk drive and for reconfiguring the operating environment after
installing the replacement drive. The exact hot-plug procedure depends on which
version of the Solaris operating environment you are using. For the complete
procedure, please refer to Platform Notes: Sun Enterprise 250 Server, available on the
Solaris on Sun Hardware AnswerBook. This AnswerBook documentation is provided
on the SMCC Supplement CD for the Solaris release you are running.
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/scsi@3/sd@b,0) or by its logical
device name (such as c0t11d0). In addition, some applications may report a disk
slot number (0 through 5) or activate an LED located next to the disk drive itself.
You can use the following table to associate a disk slot number with the logical and
physical device names for each disk drive.
Disk Slot Number Logical Device Name
Slot 0 c0t0d0
Slot 1 c0t8d0
Slot 2 c0t9d0
Slot 3 c0t10d0
Slot 4 c0t11d0
Slot 5 c0t12d0
Physical Device Name
/devices/pci@1f,4000/scsi@3/sd@0,0
/devices/pci@1f,4000/scsi@3/sd@8,0
/devices/pci@1f,4000/scsi@3/sd@9,0
/devices/pci@1f,4000/scsi@3/sd@a,0
/devices/pci@1f,4000/scsi@3/sd@b,0
/devices/pci@1f,4000/scsi@3/sd@c,0
Chapter 4 Hardware Configuration 55