用udevinfo查看設(shè)備的時候主要看哪段的信息？

6954658

例如用udevinfo -a -p /sys/block/sdb
然后會顯示好幾段，到底看哪段呢？

[root@www ~]# udevinfo -a -p /sys/block/sdb

Udevinfo starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/block/sdb':
    KERNEL=="sdb"
    SUBSYSTEM=="block"
    SYSFS{stat}=="     131        5     1088      381        0        0        0        0        0      290      381"
    SYSFS{size}=="7895040"
    SYSFS{removable}=="1"
    SYSFS{range}=="16"
    SYSFS{dev}=="8:16"

  looking at parent device '/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/host1/target1:0:0/1:0:0:0':
    ID=="1:0:0:0"
    BUS=="scsi"
    DRIVER=="sd"
    SYSFS{ioerr_cnt}=="0x2"
    SYSFS{iodone_cnt}=="0x20b"
    SYSFS{iorequest_cnt}=="0x20b"
    SYSFS{iocounterbits}=="32"
    SYSFS{timeout}=="60"
    SYSFS{state}=="running"
    SYSFS{rev}=="8.07"
    SYSFS{model}=="CM960           "
    SYSFS{vendor}=="EAGET   "
    SYSFS{scsi_level}=="3"
    SYSFS{type}=="0"
    SYSFS{queue_type}=="none"
    SYSFS{queue_depth}=="1"
    SYSFS{device_blocked}=="0"
    SYSFS{max_sectors}=="240"

  looking at parent device '/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/host1/target1:0:0':
    ID=="target1:0:0"
    BUS==""
    DRIVER==""

  looking at parent device '/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/host1':
    ID=="host1"
    BUS==""
    DRIVER==""

  looking at parent device '/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0':
    ID=="1-1:1.0"
    BUS=="usb"
    DRIVER=="usb-storage"
    SYSFS{modalias}=="usb:v058Fp6387d0101dc00dsc00dp00ic08isc06ip50"
    SYSFS{bInterfaceProtocol}=="50"
    SYSFS{bInterfaceSubClass}=="06"
    SYSFS{bInterfaceClass}=="08"
    SYSFS{bNumEndpoints}=="02"
    SYSFS{bAlternateSetting}==" 0"
    SYSFS{bInterfaceNumber}=="00"

  looking at parent device '/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1':
    ID=="1-1"
    BUS=="usb"
    DRIVER=="usb"
    SYSFS{configuration}==""
    SYSFS{serial}=="C2253A6A"
    SYSFS{product}=="Mass Storage"
    SYSFS{manufacturer}=="Generic"
    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}=="0101"
    SYSFS{idProduct}=="6387"
    SYSFS{idVendor}=="058f"
    SYSFS{bMaxPower}=="100mA"
    SYSFS{bmAttributes}=="80"
    SYSFS{bConfigurationValue}=="1"
    SYSFS{bNumInterfaces}==" 1"

  looking at parent device '/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1':
    ID=="usb1"
    BUS=="usb"
    DRIVER=="usb"
    SYSFS{configuration}==""
    SYSFS{serial}=="0000:02:03.0"
    SYSFS{product}=="EHCI Host Controller"
    SYSFS{manufacturer}=="Linux 2.6.18-164.el5 ehci_hcd"
    SYSFS{maxchild}=="6"
    SYSFS{version}==" 2.00"
    SYSFS{devnum}=="1"
    SYSFS{speed}=="480"
    SYSFS{bMaxPacketSize0}=="64"
    SYSFS{bNumConfigurations}=="1"
    SYSFS{bDeviceProtocol}=="01"
    SYSFS{bDeviceSubClass}=="00"
    SYSFS{bDeviceClass}=="09"
    SYSFS{bcdDevice}=="0206"
    SYSFS{idProduct}=="0000"
    SYSFS{idVendor}=="0000"
    SYSFS{bMaxPower}=="  0mA"
    SYSFS{bmAttributes}=="e0"
    SYSFS{bConfigurationValue}=="1"
    SYSFS{bNumInterfaces}==" 1"

  looking at parent device '/devices/pci0000:00/0000:00:11.0/0000:02:03.0':
    ID=="0000:02:03.0"
    BUS=="pci"
    DRIVER=="ehci_hcd"
    SYSFS{broken_parity_status}=="0"
    SYSFS{enable}=="0"
    SYSFS{modalias}=="pci:v000015ADd00000770sv000015ADsd00000770bc0Csc03i20"
    SYSFS{local_cpus}=="ffffffff"
    SYSFS{irq}=="51"
    SYSFS{class}=="0x0c0320"
    SYSFS{subsystem_device}=="0x0770"
    SYSFS{subsystem_vendor}=="0x15ad"
    SYSFS{device}=="0x0770"
    SYSFS{vendor}=="0x15ad"

  looking at parent device '/devices/pci0000:00/0000:00:11.0':
    ID=="0000:00:11.0"
    BUS=="pci"
    DRIVER==""
    SYSFS{broken_parity_status}=="0"
    SYSFS{enable}=="0"
    SYSFS{modalias}=="pci:v000015ADd00000790sv00000000sd00000000bc06sc04i01"
    SYSFS{local_cpus}=="ffffffff"
    SYSFS{irq}=="0"
    SYSFS{class}=="0x060401"
    SYSFS{subsystem_device}=="0x0000"
    SYSFS{subsystem_vendor}=="0x0000"
    SYSFS{device}=="0x0790"
    SYSFS{vendor}=="0x15ad"

  looking at parent device '/devices/pci0000:00':
    ID=="pci0000:00"
    BUS==""
    DRIVER==""

accessory

What do you want? What are you looking for? Then just read that part.

6954658

What do you want? What are you looking for? Then just read that part.
accessory 發(fā)表于 2010-07-01 23:04

我想通過查看udevinfo，然后自己建立/etc/udev/rules.d/的一個規(guī)則，可以固定識別某個移動設(shè)備的磁盤號，比如USB，以后只要插進(jìn)去，就自動識別為/dev/sdb，而不是其他的

但是他顯示的信息里，有幾組的參數(shù)是一樣的，比如ID，BUS，SYSFS{serial}，SYSFS{product}，以哪組信息為準(zhǔn)呢？

accessory

這個具體的就不清楚了。不好意思。。。

yjs_sh

SYSFS{serial}=="C2253A6A"

troyme

sdb等這些是內(nèi)核定的，無法更改，建議通過udev rules 給設(shè)備添加軟鏈接

buzzle

sdb等這些是內(nèi)核定的，無法更改，建議通過udev rules 給設(shè)備添加軟鏈接
troyme 發(fā)表于 2010-07-11 21:51

    可以的吧,udev可以通過netlink來告訴內(nèi)核改變名字的.

troyme

可以的吧,udev可以通過netlink來告訴內(nèi)核改變名字的.
buzzle 發(fā)表于 2010-07-12 17:54

    既然不信，你可以測試一下，試試能否把sda改成dsa，呵呵

buzzle

既然不信，你可以測試一下，試試能否把sda改成dsa，呵呵
troyme 發(fā)表于 2010-07-14 21:10

    哥，scsi總線層是有命名規(guī)則的,dsa當(dāng)然不行了,說的是你可以固定把一個磁盤命名為sda，sdb之類的,而不是系統(tǒng)自己分配.

weltion

host1/target1:0:0/1:0:0:0
這一串是每個設(shè)備唯一的，自己看著辦。。。