[root@localhost rules.d]# lsb_release -a
LSB Version: :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: RedHatEnterpriseServer
Description: Red Hat Enterprise Linux Server release 5.5 (Tikanga)
Release: 5.5
Codename: Tikanga
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 9.7G 2.2G 7.1G 24% /
/dev/sda1 190M 12M 169M 7% /boot
tmpfs 501M 0 501M 0% /dev/shm
/dev/sdb1 31G 4.6G 26G 16% /media/SSK
[root@localhost ~]# udevinfo -q path -p /dev/sdb
no record for '/dev/sdb' in database
[root@localhost ~]# udevinfo -q path -n /dev/sdb
/block/sdb
[root@localhost ~]# udevinfo -a -p /block/sdb
...
looking at parent device '/devices/pci0000:00/0000:00:11.0/0000:02:02.0/usb1/1-1':
ID=="1-1"
BUS=="usb"
DRIVER=="usb"
SYSFS{configuration}==""
SYSFS{serial}=="AA00000000000605"
SYSFS{product}=="USB DISK"
SYSFS{manufacturer}=="SMI Corporation"
SYSFS{maxchild}=="0"
SYSFS{version}==" 2.00"
SYSFS{devnum}=="2"
SYSFS{speed}=="480"
SYSFS{bMaxPacketSize0}=="64"
SYSFS{bNumConfigurations}=="1"
SYSFS{bDeviceProtocol}=="00"
SYSFS{bDeviceSubClass}=="00"
SYSFS{bDeviceClass}=="00"
SYSFS{bcdDevice}=="1100"
SYSFS{idProduct}=="1000"
SYSFS{idVendor}=="090c"
SYSFS{bMaxPower}=="500mA"
SYSFS{bmAttributes}=="80"
SYSFS{bConfigurationValue}=="1"
SYSFS{bNumInterfaces}==" 1"
...
vim /etc/udev/rules.d/99-myusb.rules
US=="usb" SYSFS{serial}=="AA00000000000605" SYSFS{manufacturer}=="SMI Corporation" SYMLINK+="myulink%n"
[root@localhost rules.d]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 9.7G 2.2G 7.1G 24% /
/dev/sda1 190M 12M 169M 7% /boot
tmpfs 501M 0 501M 0% /dev/shm
/dev/myusb1 31G 4.6G 26G 16% /media/SSK
[root@localhost rules.d]# ll /dev/my*
lrwxrwxrwx 1 root root 5 May 27 00:30 /dev/myulink -> myusb
lrwxrwxrwx 1 root root 7 May 27 00:30 /dev/myulink00 -> myusb00
lrwxrwxrwx 1 root root 7 May 27 00:30 /dev/myulink02 -> myusb02
lrwxrwxrwx 1 root root 6 May 27 00:30 /dev/myulink1 -> myusb1
lrwxrwxrwx 1 root root 7 May 27 00:30 /dev/myulink81 -> myusb81
brw-r----- 1 root disk 8, 16 May 27 00:30 /dev/myusb
crw------- 1 root root 442, 8 May 27 00:30 /dev/myusb00
crw------- 1 root root 442, 8 May 27 00:30 /dev/myusb02
brw-r----- 1 root disk 8, 17 May 27 00:30 /dev/myusb1
crw------- 1 root root 442, 8 May 27 00:30 /dev/myusb81
可以看到sdb已经被改成myusb，并创建出了myulink的链接，不过那三个字符型设备是怎么出来的暂时没搞清楚。
简单排错：
可以通过udevmonitor这个命令来看udev产生的一些事件和消息。