本文就来介绍一下Linux如何在VMware下扩展磁盘。
1:VMware虚拟磁盘扩容
如下所示,VMware虚拟磁盘扩容后,使用fdisk -l看不到任何变化
[root@localhost ~]# fdisk -l
Disk /dev/sda: 171.7 GB, 171798691840 bytes
255 heads, 63 sectors/track, 20886 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 15665 125724690 8e Linux LVM
/dev/sda3 15666 15795 1044225 83 Linux
/dev/sda4 15796 20886 40893457+ 83 Linux
Disk /dev/dm-0: 126.6 GB, 126600871936 bytes
255 heads, 63 sectors/track, 15391 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/dm-0 doesn‘t contain a valid partition table
Disk /dev/dm-1: 2113 MB, 2113929216 bytes
255 heads, 63 sectors/track, 257 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/dm-1 doesn’t contain a valid partition table
方法1:echo 1 》 /sys/class/scsi_device/device/rescan
[root@localhost ~]# cd /sys/class/scsi_disk/
[root@localhost scsi_disk]# ls
0:0:0:0
[root@localhost scsi_disk]# cd 0:0:0:0/
[root@localhost 0:0:0:0]# echo ‘1’ 》 device/rescan
[root@localhost 0:0:0:0]# fdisk -l
Disk /dev/sda: 173.9 GB, 173946175488 bytes
255 heads, 63 sectors/track, 21147 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 15665 125724690 8e Linux LVM
/dev/sda3 15666 15795 1044225 83 Linux
/dev/sda4 15796 20886 40893457+ 83 Linux
Disk /dev/dm-0: 126.6 GB, 126600871936 bytes
255 heads, 63 sectors/track, 15391 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/dm-0 doesn‘t contain a valid partition table
Disk /dev/dm-1: 2113 MB, 2113929216 bytes
255 heads, 63 sectors/track, 257 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/dm-1 doesn’t contain a valid partition table
方法2:重新扫描特定的 SCSI Device
echo 1 》 /sys/block/$DEVICE/device/rescan 用sda, sdb, sdc等替换$DEVICE
[root@localhost ~]# echo 1 》 /sys/block/sda/device/rescan
2:VMware新增虚拟磁盘
首先找到您的主机总线编号
[root@localhost ~]# grep mpt /sys/class/scsi_host/host?/proc_name
/sys/class/scsi_host/host0/proc_name:mptspi
使用下面命令扫描SCSI总线
[root@localhost ~]# echo “- - -” 》 /sys/class/scsi_host/host0/scan
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