The disk we added cannot be viewed using the fdisk command:
[Root @ Rac1 ~] # Fdisk-l
Disk/dev/SDA: 32.2 GB, 32212254720 bytes
255 heads, 63 sectors/track, 3916 Cylinders
Units = cylinders of 16065*512 = 8225280 bytes
Sector size (logical/physical): 512 bytes/512 bytes
I/O size (minimum/optimal): 512 bytes/512 bytes
Disk identifier: 0x00085ca1
Device boot start end blocks ID system
/Dev/sda1 × 1 26 204800 83 Linux
Partition 1 does not end on cylinderboundary.
/Dev/sda2 26 281 2048000 82 Linux swap/Solaris
Partition 2 does not end on cylinder boundary.
/Dev/sda3 281 3917 29203456 83 Linux
[Root @ Rac1 ~] #
-- But view/proc/partitions, which can be displayed as follows:
[Root @ Rac1 ~] # Cat/proc/Partitions
Major minor # Blocks name
8, 0, 31457280, SDA
8 1 204800 sda1
8 2 2048000 sda2
8, 3, 29203456, sda3
8 16 8388608 SDB
8 32 8388608 SDC
8388608 SDD
8 64 8388608 SDE
8 80 1048576 SDF
8 96 1048576 SDG
8 112 1048576 SDH
[Root @ Rac1 ~] #
Run start_udev manually and run the fdisk command to view the disk.
It is estimated that there is a problem during udev startup.
View the udev service status:
[Root @ Rac1 ~] # Service udev-post status
[Root @ Rac1 ~] # Chkconfig udev-post -- list
Udev-post 0: off 1: On 2: On 3: On 4: On 5: on 6: Off
[Root @ Rac1 ~] # Service udev-post Start
Retrigger failed udev events [OK]
Note:
I am using Oracle Linux, so the udev service is: udev-post. If it is RedHat, the corresponding service is: udev
If you do not study this issue in depth, add start_udev to the startup Item to ensure normal use.
[Root @ rac2 ~] # Vim/etc/rc. d/rc. Local
#! /Bin/sh
#
# This script will be executed * after * allthe other init scripts.
# You can put your own initialization stuffin here if you don't
# Want to do the full sys V style initstuff.
Touch/var/lock/subsys/local
/Sbin/start_udev
Notes.
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