讲解CentOS新增硬盘，重新扫描总线方案

[root@localhost ~]# ls -l /sys/block/sda

lrwxrwxrwx. 1 root root 0 Jun 15 11:47 /sys/block/sda -> ../devices/pci0000:00/0000:00:10.0/host32/target32:0:0/32:0:0:0/block/sda

echo "- - -" > /sys/class/scsi_host/host32/scan

[  620.865767] scsi 32:0:1:0: Direct-Access     VMware,  VMware Virtual S 1.0  PQ: 0 ANSI: 2[  620.865800] scsi target32:0:1: Beginning Domain Validation

[  620.866413] scsi target32:0:1: Domain Validation skipping write tests

[  620.866416] scsi target32:0:1: Ending Domain Validation

[  620.866450] scsi target32:0:1: FAST-40 WIDE SCSI 80.0 MB/s ST (25 ns, offset 127)

[  620.870284] sd 32:0:1:0: Attached scsi generic sg2 type 0[  620.870360] sd 32:0:1:0: [sdb] 2097152 512-byte logical blocks: (1.07 GB/1.00 GiB)

[  620.870408] sd 32:0:1:0: [sdb] Write Protect is off

[  620.870410] sd 32:0:1:0: [sdb] Mode Sense: 61 00 00 00[  620.870734] sd 32:0:1:0: [sdb] Cache data unavailable

[  620.870736] sd 32:0:1:0: [sdb] Assuming drive cache: write through

[  620.874775] sd 32:0:1:0: [sdb] Cache data unavailable

[  620.874779] sd 32:0:1:0: [sdb] Assuming drive cache: write through

[  620.875859]  sdb: unknown partition table

[  620.876069] sd 32:0:1:0: [sdb] Cache data unavailable

[  620.876071] sd 32:0:1:0: [sdb] Assuming drive cache: write through

[  620.876123] sd 32:0:1:0: [sdb] Attached SCSI disk