Solaris下，一個磁盤包含8個分區，標記為0－7。
分區0位根分區，包含啟動的信息
分區2代表整個磁盤
交換分區可以是任何分區，默認為分區1
其它分區用戶存放數據
邏輯設備名存放在/dev/dsk和/dev/rdsk中。這些名稱是/devices目錄下的符號連接。使用邏輯設備名便於系統管理員操作。
Sun使用下列命名方式定義邏輯設備名：
/dev/[r]dsk/c#t#d#s#
c:邏輯控制器號
t:物理總線目標號
d:磁盤或邏輯單元號(LUN)
s:分區號
物理設備名表示設備的完整信息，如設備總線地址。物理設備名在/devices目錄下。
# ls -l /dev/dsk/c0t3d0s0
lrwxrwxrwx 1 root root 86 Oct 20 16:04 /dev/dsk/c0t3d0s3 ->
../../devices/iommu@0,10000000/sbus@0,10001000/espdma@5,8400000/esp@5,880
0000/sd@3,0:d
實例名是系統設備的簡稱。例如：
sdn where s = SCSI, d = disk, and n = 邏輯磁盤號，例如sd0，表示第一個SCSI磁盤設備。
dmesg顯示實例名
dmesg命令鑒別系統所連接的設備。以實例和物理設備名稱的方式顯示。
# dmesg|more
May 13 20:18
cpu0: SUNW,UltraSPARC (upaid 0 impl 0x10 ver 0x40 clock 167 MHz)
SunOS Release 5.7 Version Generic [UNIX(R) System V Release 4.0]
Copyright (c) 1983-1998, Sun Microsystems, Inc.
NOTICE: 64 bit OS installed, but the 32-bit OS is the default
for the processor(s) on this system.
See boot(1M) for more information.
Booting the 32-bit OS ...
mem = 196608K (0xc000000)
avail mem = 189440000
Ethernet address = 8:0:20:9b:60:b5
root nexus = Sun Ultra 1 SBus (UltraSPARC 167MHz)
sbus0 at root: UPA 0x1f 0x0 ...
sbus0 is /sbus@1f,0
dma0 at sbus0: SBus0 slot 0xe offset 0x8400000
dma0 is /sbus@1f,0/espdma@e,8400000
/sbus@1f,0/espdma@e,8400000/esp@e,8800000 (esp0):
esp-options=0x46
...
...
prtconf用於顯示系統的配置信息，包括內存、外圍設備等。
# prtconf|more
System Configuration: Sun Microsystems sun4u
Memory size: 192 Megabytes
System Peripherals (Software Nodes):
SUNW,Ultra-1
packages (driver not attached)
terminal-emulator (driver not attached)
deblocker (driver not attached)
obp-tftp (driver not attached)
disk-label (driver not attached)
sun-keyboard (driver not attached)
ufs-file-system (driver not attached)
chosen (driver not attached)
openprom (driver not attached)
client-services (driver not attached)
options, instance #0
aliases (driver not attached)
memory (driver not attached)
virtual-memory (driver not attached)
counter-timer (driver not attached)
sbus, instance #0
SUNW,CS4231, instance #0 (driver not attached)
auxio (driver not attached)
...
...
當在系統中增加新設備時，需要重新配置系統的硬件信息。這樣，系統就會重新構建/devices和/dev目錄。 下面是新增加硬盤的步驟：
1.在根目錄下創建一個名為/reconfiguration的空文件，然後重新關機。
2. 將硬盤接上機器，然後開機。
3.用format命令查看新增的硬盤。 # touch /reconfigure
# init 5
# format
