1.组Raid
磁盘前512K组合
- 前446K:MBR引导程序
- 中64K:分区表
- 后2K:校检码
- Raid0:极致的读写速度,一个数据分散到多个盘去读写。但是极不安全,一旦坏了一块盘那么所有盘都将无法读取数据
- Raid1:一个数据每多一块盘就有一个完全相同的备份,但读写速度一般同时成本较高
- Raid5:每个数据存储时都有一个校验码,任何一块盘坏了都可以用校验码给算出来,并进行恢复,但是只支持一块盘坏读写速度较快性价比高
- Raid10:先用两块盘组1再组0,既保证了速度又保证了安全,支持坏一块盘,但是别坏在一组盘上就行
1.1已知新装四块硬盘
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vaDV4eW45bWRzZHBpdWlnMnZtZ2p6aHF3L2ltYWdlXzFjanN1anRwMTExMzZjazAxbHJjcjVwMWpwZ3MucG5n)
1.2组Raid5
,名字叫md5
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vaXZoaWc5M3B4YjNqa2kyZW83dWptdGV1L2ltYWdlXzFjanN1a2NsMzExZzUxdnE3MTFlZDY1djcyMTkucG5n)
1.3查看md5的状态
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vNDl1YzJhM3hyOW5nNHA4Z3oxeXV3YnFuL2ltYWdlXzFjanN1a3ZlNjFvMzIxNjI3bjVhMWZhdXNpZzFtLnBuZw==)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vZzh3c2FxYWU2ZGxqd3MzcGpmN3V3NDBjL2ltYWdlXzFjanN1bGI4NDEwdTk3czIxMDRjMTM2am0wNzIzLnBuZw==)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vZ2g3emY3b2FrM2tra2VoaWk1YTJsZzd6L2ltYWdlXzFjanN1bjk0MzFvYmJzMXAzNDIybHMyMXA1Zy5wbmc=)
1.4把/dev/md5格式化
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8va3dkcWk0Z2x4eWJiZW81a2V5d2V4dXJoL2ltYWdlXzFjanN1bm4wZzF2N2QxcmtxYmhmMXN1bTE3OG01dC5wbmc=)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vb3ZjdnI1N3RjNGY5NzlleGZreHh6YTA0L2ltYWdlXzFjanN1bzBkMzJiYXEyOTNqM245cmRhZjZhLnBuZw==)
1.5挂载/dev/md5
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vNjVkdXcyNDF2eHI2cGJ0czd4aGo3MXpvL2ltYWdlXzFjanN1b2NuczF0cnIxMGNnanZsMWdxb24xczZuLnBuZw==)
1.6把坏掉的/dev/sdb换下来
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vZ3QwdndkanFtM3h0ZHRnNzNpamZxMnpoL2ltYWdlXzFjanN1b3A1cHU1aG1qaDFvdTFodDFvbXY3NC5wbmc=)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vNmo5dnR1YXFlc3hmZzFuczNwY3FwczV3L2ltYWdlXzFjanN1cHFlOTFldDVmNW0zZWsxdWViOGJsOGgucG5n)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vYWo3bG5mdGRwOG5yZDh3N2k5dWxyZWJwL2ltYWdlXzFjanN1cTRyMjFzczQxNjMxODY4M2RkbWtoOHUucG5n)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vcHViYW93aDVhYjJlcHMya2JlNmhkcnJuL2ltYWdlXzFjanN1cWYzNTEzbzMxN25rYjFnaTJyMWEyOWIucG5n)
1.7坏掉的/dev/sdb踢出去
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vNXlpc3dqc2U0bXRqNXU5ZDlqNHczaGN2L2ltYWdlXzFjanN1cXNvNzFwaHJyYTcxN2VvaHFlOG5oOW8ucG5n)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vYWxrNjR6aGg0cXJuaXlzMjl3M3g5b2JkL2ltYWdlXzFjanN1cjYxZzFhM3E1ajkxMWJvYnRxMTBsNGE1LnBuZw==)
1.8把新的磁盘/dev/sdb重新插回/md5
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8veGo5dGxxZXM0OGpiZ3FwNnlnb3ZoeTF6L2ltYWdlXzFjanN1cmgyODFzazFpcjMxZm9jMW5jOThlcmFpLnBuZw==)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vMmF3MjgycGhpbnplbGZydHJnNzhibjdmL2ltYWdlXzFjanN1cnFhaW1ic3NnYzFhMWsxN2RuZ3FtYXYucG5n)
2.磁盘分区
2.1为磁盘分区
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vd3V2czBvbDg0dWFnaDBrMXJzZTBrcGZxL2ltYWdlXzFjanN2MHNkcXBicWg3NDNmMzczdTFkZm1lYy5wbmc=)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8veG9mdjZnNXkzaGJrcTd4dHE4NXZlaDdoL2ltYWdlXzFjanN2MTRrczFob2YxbGtyNWViNmk1YmQ1ZXAucG5n)
2.2创建主分区(一般前三个为主分区,第四个为扩展分区,在扩展分区的基础上创建虚拟分区)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vNnE4dHFveG5vemlvZmdzdjBsMTJjcGJuL2ltYWdlXzFjanN2MXMwaG10NGhxdGM5YmY0YTFqNmlmNi5wbmc=)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vY3Zvb2t6a2cycmI5bzNuNGxoZW95bnFhL2ltYWdlXzFjanN2MjQ3ZjY4ZTFnZG4xNHZrMTAxMjFpZHRmai5wbmc=)
2.3创建扩展分区
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vZDVqYjhyemVuemJ2cDd0N2x4czY5NjJwL2ltYWdlXzFjanN2M2NpaDFxbDAxdnIyM29sMWhkbW04aDMucG5n)
2.4创建虚拟分区
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vcnFoYWRwa2NxZHIxN3RneGd1MGVkNzN0L2ltYWdlXzFjanN2M25vMWJjb3FlMXZ2NzEwODExdW1raGcucG5n)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8veHBneng4enM2eGc3d3N6ZjdobXpjdG9rL2ltYWdlXzFjanN2M3Y4aDF0NzYxNTBudGRnMW1pdDFhNjRodC5wbmc=)
3.LVM
逻辑卷
3.1pv
化
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vM2FiN2hhYmRybHZodG0zZmNtY205dTBoL2ltYWdlXzFjanN2Y2Z2MHU2dDE5Z28zc2dmY2lwODNpcS5wbmc=)
3.2pvs
查看逻辑卷
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vcG4wbm1tN3cxNnk4c2VnODY5YWozam5nL2ltYWdlXzFjanN2ZDEyZzFwcmNoaTAxcnBhMTZlZHBmMmo3LnBuZw==)
3.3vg
化
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vcHJlbzZyZ3U2eTd1Mmlwd3lmaWJ2ejZyL2ltYWdlXzFjanN2ZGFnYjFmdGU1ZGZudmVraHExNGR0amsucG5n)
3.4vgs
查看卷组
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8veDZjMWg0YXRhN21qd3hqY2plZnUzYmVuL2ltYWdlXzFjanN2ZHRhZWFlNDFqZmpnaWwxdHBlOGpoazEucG5n)
3.5lv
化
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vOTR1Zjk4bjhoYnd0OWkzNXI5YzJmY3dvL2ltYWdlXzFjanN2ZjQ4MXJndDE0MjMxY3MzNnZxMTRtZWtuLnBuZw==)
3.6lvs
查看lv大小
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vempvbWk3b3FoamNzNmowZnYwcDl6OWhoL2ltYWdlXzFjanN2ZnNudWVpazN1aGVxcjA1M29tbGsucG5n)
3.7假设分出去的磁盘yangwenbo
空间不够用
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vY20ydDM2Y29ucTY2eDB6N2k4dGZ5Y2t1L2ltYWdlXzFjanN2aWhrMDFvNmoxNXRjMWUxZ3JpcWVhb3ExLnBuZw==)
3.8现在内存如下
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vZmV6YmhtOXcxdjFsOHFieGRoOHA5eXJrL2ltYWdlXzFjanN2ajB0azFkMzAyZjQxaWNvY2c4MXBuNXFlLnBuZw==)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vZjk4dzhzNXRueWZ6cXljYnhrYnZsdTZ5L2ltYWdlXzFjanN2amE2Z2JpbjFwNDIzbzlhbHMxaTdicXIucG5n)
3.9为磁盘新增内存
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vZmw0OG5qaml0bGV6Y3VoN3dnZDh0MGc3L2ltYWdlXzFjanN2anEybGhqa2ZhNDF2a3AxNG81NWt2cjgucG5n)
3.10然而
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vbmU0YjVlZGprbDRqZG9kN2I4MGtpZ29qL2ltYWdlXzFjanN2azRwZGVvYWNwaHRhYmY1dDFwcnFybC5wbmc=)
3.11需要把新增磁盘空间格式化(不会影响源磁盘空间数据)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vNmxsNWhhYnY2NHU2Nnoya3N1M2phaGhiL2ltYWdlXzFjanN2a2tpZDFia3FzOTQxcXZlMW1laGg5M3MyLnBuZw==)
![Raid,分区表与LVM逻辑卷 Raid,分区表与LVM逻辑卷](/default/index/img?u=aHR0cDovL3N0YXRpYy56eWJ1bHVvLmNvbS95YW5nd2VuYm8vdm1jaW5xd21iYnFwOGU1OTZoN2NqeHUyL2ltYWdlXzFjanN2a3Q2NjF1aHUxbzBwMWIwM2ZxdXAxNHNmLnBuZw==)