Virtual machine new hard disk, how to let the Linux system recognize?

Virtual machine new hard disk, how to let the Linux system recognize?

Here are two ways to make the Linux system recognize the new hard drive:

1. Restart the system (do not use the brain to take care of it)

Some people say, I am lazy, do not want to move the brain, then this method (restart the system, everything done) is suitable for you.

So, what if this Linux system has a business running and cannot be restarted? What to do, then will have to move + brain.

The trick, see the following method.

2, execute the order, re-scan the device

#先cd到/sys/class/scsi_host/Directory

[Email protected]/]# cd/sys/class/scsi_host/

#我们来看看scsi_host目录有啥东西呢, here are three subdirectories.

[[email protected] scsi_host]# ls host0 host1 host2

#执行如下命令

[Email protected] scsi_host]# echo "---" > Host0/scan Note: "--" these three "-" there are spaces in the middle. "

#用fdisk命令来查看下吧

[Email protected] scsi_host]# fdisk-l

#如果还是没有识别到, don't worry, go on;

[Email protected] scsi_host]# echo "---" > host1/scan [[email protected] scsi_host]# echo "---" > Host2/scan

#我们再分别执行下上面host1和host2的命令, then fdisk down!

 [[EMAIL PROTECTED] SCSI_HOST]# FDISK -L DISK /DEV/SDA: 171.8 GB,  171798691840 bytes 255 heads, 63 sectors/track, 20886 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: 0x000d1499    Device Boot      Start          end      blocks   id  system/ dev/sda1   *           1           26      204800    83  linuxpartition 1 does not end on cylinder boundary./dev/sda2               26          281     2048000   82  linux swap /  solarispartition 2 does not end on cylinder boundary./dev/sda3              281        20887   165518336   83  linux disk /dev/sdb: 64.4  GB, 64424509440 bytes 255 heads, 63 sectors/track, 7832  Cylinders units = cylinders of 16065 * 512 = 8225280 bytes  Sector size  (logical/physical): 512 bytes / 512 bytes i/o  size  (minimum/optimal):  512&Nbsp;bytes / 512 bytes disk identifier: 0x00000000 

#到这里我们可以看到除了Disk/dev/sda:171.8 GB, a disk/dev/sdb:64.4 GB is also present. This will be OK, start on the new disk on what to do.

This article is from the "Ilinux" blog, make sure to keep this source http://shenzhijin.blog.51cto.com/1741240/1863941

Virtual machine new hard disk, how to let the Linux system recognize?