Linux 添加新硬盤無法識別[無需重啟]的解決方法

1、查看硬盤

[root@linux-host1 ~]# lsblk NAMEMAJ:MIN RM SIZE RO TYPE MOUNTPOINTsda8:0020G0 disk ├─sda18:101G0 part /boot└─sda28:2019G0 part ├─centos-root 253:0017G0 lvm/└─centos-swap 253:102G0 lvm[SWAP]sr011:011G0 rom # 沒有檢查到sdb的硬盤

2、查看當前系統有多少個host目錄

[root@linux-host1 ~]# ls /sys/class/scsi_host/ -ltotal 0lrwxrwxrwx. 1 root root 0 Sep 16 12:42 host0 -> ../../devices/pci0000:00/0000:00:10.0/host0/scsi_host/host0lrwxrwxrwx. 1 root root 0 Sep 16 12:42 host1 -> ../../devices/pci0000:00/0000:00:07.1/ata1/host1/scsi_host/host1lrwxrwxrwx. 1 root root 0 Sep 16 12:42 host2 -> ../../devices/pci0000:00/0000:00:07.1/ata2/host2/scsi_host/host2

3、有多少個host就往多少個host目錄里面文件scan追加"- - -"

[root@linux-host1 ~]# echo "- - -"> /sys/class/scsi_host/host0/scan[root@linux-host1 ~]# echo "- - -"> /sys/class/scsi_host/host1/scan[root@linux-host1 ~]# echo "- - -"> /sys/class/scsi_host/host2/scan

4、再次檢查硬盤是否已經識別到

[root@linux-host1 ~]# lsblk NAMEMAJ:MIN RM SIZE RO TYPE MOUNTPOINTsda8:0020G0 disk ├─sda18:101G0 part /boot└─sda28:2019G0 part ├─centos-root 253:0017G0 lvm/└─centos-swap 253:102G0 lvm[SWAP]sdb8:16020G0 disk <<已經識別成功sr011:011G0 rom

5、一鍵執行的shell腳本

#!/bin/bashscsisum=`ls -l /sys/class/scsi_host/host*|wc -l`for ((i=0;i<${scsisum};i++))doecho "- - -" > /sys/class/scsi_host/host${i}/scandone