Linux vmware扩容无法识别
环境：Centos 7 + Vmware 6.7问题：在vmeare 6.7 为centos 添加一块50g的硬盘用于扩容后，通过 echo "- - -" > /sys/class/scsi_host/host2/scan 等正常命令都无法识别到硬盘。通过fdisk -l 识别不到。[root@localhost ~]# fdisk -lDisk /dev/sda: 42.9 GB, 42
环境：Centos 7 + Vmware 6.7
问题：在vmeare 6.7 为centos 添加一块50g的硬盘用于扩容后，通过 echo "- - -" > /sys/class/scsi_host/host2/scan 等正常命令都无法识别到硬盘。通过fdisk -l 识别不到。
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[root@localhost ~]# fdisk -l Disk /dev/sda: 42.9 GB, 42949672960 bytes, 83886080 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x000b5faf Device Boot Start End Blocks Id System /dev/sda1 * 2048 1026047 512000 83 Linux /dev/sda2 1026048 83886079 41430016 8e Linux LVM Disk /dev/sdb: 107.4 GB, 107374182400 bytes, 209715200 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/centos-root: 139.6 GB, 139586437120 bytes, 272629760 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/centos-swap: 1073 MB, 1073741824 bytes, 2097152 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/centos-home: 9130 MB, 9130999808 bytes, 17833984 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes |
解决方法：
1 查看scsi
[root@localhost ~]# more /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 2.0
Type: Direct-Access ANSI SCSI revision: 06
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 2.0
Type: Direct-Access ANSI SCSI revision: 06
2 使用命令
echo "scsi add-single-device 0 0 2 0">/proc/scsi/scsi
其中“0 0 2 0” 对应上 scsi0 00 02(01+1) 00 查看下图1 ，2
SCSI控制器0 SCSI0:2硬盘3
echo "scsi add-single-device 0 0 2 0">/proc/scsi/scsi
echo "scsi add-single-device x y z u"> /proc/scsi/scsi
x是硬盘或者磁带机所在SCSI控制器号；
y是硬盘或者磁带机所在SCSI通道的编号；
z是硬盘或者磁带机的SCSI ID号；
u是硬盘或者磁带机的lun号默认情况都是0
如果x y z参数不正确，系统是不能识别添加的硬盘和磁带机的可以通过 cat /proc/scsi/scsi命令来核实是否添加成功。
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