《linux的dd命令克隆磁盘方法》由会员分享，可在线阅读，更多相关《linux的dd命令克隆磁盘方法（4页珍藏版）》请在金锄头文库上搜索。
1、dd命令克隆磁盘方法dd命令克隆磁盘方法一、 说明一般情况下均要求使用高性能的windows服务器或PC，在Windows操作系统使用winhex软件进行磁盘克隆，界面化操作方便。若无法找到window服务可以在存储使用dd命令克隆磁盘，该方法可能会影响在线业务（dd命令克隆磁盘，会消耗CPU与内存资源），建议在业务量小或暂停业务的情况下操作；注意：用dd命令进行磁盘克隆需要小心操作，容易操作错误，存在丢数据的风险，受限使用；本文介绍存储上用dd命令克隆磁盘方法；源盘：需要进行克隆的故障磁盘；目标盘：替换的新磁盘；二、 注意事项在进行克隆磁盘时，有以下注意事项：1. 目标盘的容量必须等于或大于
2、源盘；2. 在克隆过程禁止做异常掉电或直接给磁盘断电的操作；3. 故障盘不存在异常下电的情况4. 在确认源盘和目标盘的块设备号后再进行克隆操作；查找块设备号和dd克隆操作需要在同一控制器上执行；三、 操作方法所有操作均需要在同一控制器上执行；1. 记录源盘和目标盘的S/N号，并做好标记；例如：源盘为1,0,0,10，对应S/N号为WD-WMATV8173853目标盘为1,0,0,11，对应S/N号为WD-WCAW301055562. 将目标磁盘插入存储设备的空闲槽位（1,0,0,11）3. 关闭磁盘休眠开关，并唤醒空白盘（目标盘为11号盘）rootVX3000-0 # clidisk set
3、sleep=offdisk set location=1,0,0,11 power=active4. 根据槽位号，找到源盘和目标盘的块设备号比如10号盘是源盘，11号盘是目标盘，如下找到块设备号为sdn、sdlrootVX3000-0 # clidisk display location=1,0,0,10 info Disk(s):1 Location : 1,0,0,10 Disk Acsl : 6,0,12,0 #10号槽位对应的Acsl号 Vendor : Uniview Model No : WD1002FBYS-02A6B0 Firmware Rev : 03.00C06 Seria
4、l No : WD-WMATV8173853 #10号槽位磁盘SN号（源盘）disk display location=1,0,0,11 info Disk(s):1 Location : 1,0,0,11 Disk Acsl : 6,0,11,0 #11号槽位对应的Acsl号 Vendor : Uniview Model No : WD1003FBYX-01Y7B0 Firmware Rev : 01.01V01 Serial No : WD-WCAW30105556 #11号槽位磁盘SN号（目标盘）#根据Acsl号查找块设备号，如下10号槽位的源盘的块设备号为sdn#11号槽位的目标盘的块
5、设备号为sdlrootVX3000-0 # ll /sys/block/ | grep 6:0:12:0lrwxrwxrwx 1 root root 0 Jul 11 11:06 sdn - ./devices/pci0000:00/0000:00:01.1/0000:07:00.0/host6/port-6:0/expander-6:0/port-6:0:12/end_device-6:0:12/target6:0:12/6:0:12:0/block/sdnrootVX3000-0 # ll /sys/block/ | grep 6:0:11:0lrwxrwxrwx 1 root root
6、0 Jul 11 11:06 sdl - ./devices/pci0000:00/0000:00:01.1/0000:07:00.0/host6/port-6:0/expander-6:0/port-6:0:11/end_device-6:0:11/target6:0:11/6:0:11:0/block/sdl5. 通过对应块设备号的smart信息再次确认数据克隆的源盘和目标盘是正确的#使用smartctl命令查询磁盘smart信息#sdn的块设备对应的SN号为WD-WMATV8173853rootVX3000-0 # smartctl -all /dev/sdnsmartctl 5.39.
7、1 2010-01-28 r3054 x86_64-unknown-linux-gnu (local build)Copyright (C) 2002-10 by Bruce Allen, = START OF INFORMATION SECTION =Model Family: Western Digital RE3 Serial ATA familyDevice Model: WDC WD1002FBYS-02A6B0Serial Number: WD-WMATV8173853（源盘）Firmware Version: 03.00C06User Capacity: 1,000,204,88
8、6,016 bytesDevice is: In smartctl database for details use: -P showATA Version is: 8ATA Standard is: Exact ATA specification draft version not indicatedLocal Time is: Fri Jul 11 11:31:11 2014 CSTSMART support is: Available - device has SMART capability.SMART support is: EnabledError SMART Status com
9、mand failedPlease get assistance from A mandatory SMART command failed: exiting. To continue, add one or more -T permissive options.#sdl的块设备对应的SN号为WD-WCAW30105556rootVX3000-0 # smartctl -all /dev/sdlsmartctl 5.39.1 2010-01-28 r3054 x86_64-unknown-linux-gnu (local build)Copyright (C) 2002-10 by Bruce
10、 Allen, = START OF INFORMATION SECTION =Device Model: WDC WD1003FBYX-01Y7B0Serial Number: WD-WCAW30105556（目标盘）Firmware Version: 01.01V01User Capacity: 1,000,204,886,016 bytesDevice is: Not in smartctl database for details use: -P showallATA Version is: 8ATA Standard is: Exact ATA specification draft
11、 version not indicatedLocal Time is: Fri Jul 11 11:31:21 2014 CSTSMART support is: Available - device has SMART capability.SMART support is: EnabledError SMART Status command failedPlease get assistance from A mandatory SMART command failed: exiting. To continue, add one or more -T permissive option
12、s.rootVX3000-0 #6. 使用dd命令进行磁盘克隆注意下发dd命令的控制器与查询块设备号的命令需在同一个控制器上rootVX3000-0 # nohup time dd if=/dev/sdn of=/dev/sdl bs=1024k conv=noerror &查看结果打印，确认拷贝的数据量，是否为磁盘容量rootVX3000-0 # cat nohup.out11789+1 records in11789+1 records out12362407936 bytes (12 GB) copied, 212.118 s, 58.3 MB/s0.03user 13.63system
13、 3:32.11elapsed 6%CPU (0avgtext+0avgdata 7568maxresident)k24141328inputs+24145336outputs (1major+514minor)pagefaults 0swaps11789+1 records in11789+1 records out12362407936 bytes (12 GB) copied, 240.7 s, 51.4 MB/s0.04user 13.57system 4:00.70elapsed 5%CPU (0avgtext+0avgdata 7584maxresident)k24071392inputs+24145328outputs (1major+515minor)pagefaults 0swaps第4页，共4页
