LVM利用Linux内核的device-mapper来实现存储系统的虚拟化(系统分区独立于底层硬件)。通过LVM,你可以实现存储空间的抽象化并在上面建立虚拟分区,可以更简便地扩大和缩小分区,可以增删分区时无需担心某个硬盘上没有足够的连续空间。 简单来说:LVM是Linux环境中对磁盘分区进行管理的一种机制,是建立在硬盘和分区之上、文件...
[root@root~]# pvdisplay -v Scanning for physical volume names Wiping cache of LVM-capable devices --- Physical volume --- PV Name /dev/sda2 VG Name VolGroup00 PV Size 557.65 GB / not usable 21.17 MB Allocatable yes (but full) PE Size (KByte) 32768 Total PE 17844 Free PE 0 Allocat...
和非LVM系统将包含分区信息的元数据保存在位于分区的起始位置的分区表中一样,逻辑卷以及卷组相关的元数据也是保存在位于物理卷起始处的VGDA(卷组描述符区域)中。VGDA包括以下内容: PV描述符、VG描述符、LV描述符、和一些PE描述符。系统启动LVM时激活VG,并将VGDA加载至内存,来识别LV的实际物理存储位置。当系统进行I...
Command (m for help): n Partition type: p primary (0 primary, 0 extended, 4 free) e extended Select (default p): p Partition number (1-4, default 1): First sector (2048-209715199, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-209715199, d...
5,qemu http的使用 在libvirt的xml中,disk的配置如下: <disk type='network' device='cdrom'> <driver name='qemu' type='raw'/> <host name='192.168.1.10' port='80'/> <target dev='hdd' bus='ide'/> <readonly/> </disk> 6,qemu http的实现 在qemu-2.8/block/curl.c中, 实现了bloc...
Changed type of partition 'Linux' to 'Linux LVM' Command (m for help): p Disk /dev/vda: 32.2 GB, 32212254720 bytes, 62914560 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes ...
Linux ---4个主分区(sda4是扩展分区),2个逻辑分区/dev/sda2 * 4096 2101247 1048576 83Linux/dev/sda3 2101248 67770367 32834560 82 Linux swap /Solaris/dev/sda4 67770368 935544831 433887232 5Extended/dev/sda5 67772416 68034559 131072 6FAT16/dev/sda6 68036608 935544831 4337541128e Linux LVM Disk/...
1. Use "pvresize" to let LVM know that the physical disk size has changed: [before pvresize] # pvdisplay /dev/sdc --- Physical volume --- PV Name /dev/sdc VG Name tomcat_vg PV Size 10.00 GiB / not usable 4.00 MiB Allocatable yes (but full) ...
Chapter 14How to configure LVM in Linux step-by-step Chapter 15How to configure RAID in Linux step-by-step Conclusion Understanding Linux disk management terminology is crucial for effective system administration. With a clear grasp of the types of hard disks available, such as HDDs and SSDs,...
Error:Missing LVM Magic. Disk doesn't have a valid LVM Device Error:Failed to Initialize LVM Metadata In circumstances where the corruption is irreversible, VMware recommends that you restore from backup or consult with a data recovery organization as VMware does not perform data recovery. For mor...