添加一块新硬盘scsi总线登录到系统内查看如下系统内没有识别到新加入的硬盘解决方法扫描所有scsi总线查看所有总线rootubuntu:~# ls /sys/class/scsi_host/host0 host11 host14 host17 host2 host22 host25 host28 host30 host4 host7 host1 host12 host15 host18 host20 host23 host26 host29 host31 host5 host8 host10 host13 host16 host19 host21 host24 host27 host3 host32 host6 host9扫描所有总线echo - - - /sys/class/scsi_host/host*/scan三个 - 分别代表channel, target, lun- - - 表示全盘扫描。host*/scan 会匹配所有 host0/scan、host1/scan…。rootubuntu:~# lsblkNAMEMAJ:MIN RM SIZE RO TYPE MOUNTPOINTS loop07:0063.9M1loop/snap/core20/2318loop17:1063.8M1loop/snap/core20/2769loop27:2087M1loop/snap/lxd/29351loop37:3038.8M1loop/snap/snapd/21759sda8:0020G0disk ├─sda18:101M0part ├─sda28:201.8G0part/boot └─sda38:3018.2G0part └─ubuntu--vg-ubuntu--lv253:0010G0lvm/sdb8:16020G0disk sr011:012G0rom可以看出/dev/sdb 硬盘已经被扫出来了极端情况重启服务器。