添加硬盘后不重启使系统识别新硬盘

添加新硬盘

[23:58:29 root@c7-1-54 ~]#ll /sys/class/scsi_host/
total 0
lrwxrwxrwx. 1 root root 0 Nov 30 19:39 host0 -> ../../devices/pci0000:00/0000:00:10.0/host0/scsi_host/host0
lrwxrwxrwx. 1 root root 0 Nov 30 19:39 host1 -> ../../devices/pci0000:00/0000:00:07.1/ata1/host1/scsi_host/host1
lrwxrwxrwx. 1 root root 0 Nov 30 19:39 host2 -> ../../devices/pci0000:00/0000:00:07.1/ata2/host2/scsi_host/host2

三个总线控制器。

添加后系统不能及时识别

需要刷新系统

在三个总线控制器目录下新建文件令系统能识别到硬盘的改变

[00:12:20 root@c7-1-54 ~]#echo '- - -' > /sys/class/scsi_host/host1/scan
[00:13:34 root@c7-1-54 ~]#echo '- - -' > /sys/class/scsi_host/host2/scan
[00:13:39 root@c7-1-54 ~]#echo '- - -' > /sys/class/scsi_host/host3/scan
-bash: /sys/class/scsi_host/host3/scan: No such file or directory
[00:13:43 root@c7-1-54 ~]#echo '- - -' > /sys/class/scsi_host/host0/scan

使用别名来自定义执行三个命令

[00:16:25 root@c7-1-54 ~]#alias --help
-bash: alias: --: invalid option

[00:21:28 root@c7-1-54 ~]#echo '- - -' > /sys/class/scsi_host/host0/scan;echo '- - -' > /sys/class/scsi_host/host1/scan;echo '- - -' > /sys/class/scsi_host/host2/scan;
[00:21:32 root@c7-1-54 ~]#alias scandisk=`echo '- - -' > /sys/class/scsi_host/host0/scan;echo '- - -' > /sys/class/scsi_host/host1/scan;echo '- - -' > /sys/class/scsi_host/host2/scan;`
[00:23:03 root@c7-1-54 ~]#scandisk