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Dell 灵越620s 装双系统问题：17 cannot mount selected partition

时间：2011-12-04

来源：互联网

将160GB台式机内主硬盘（/dev/sda）用 160GB 爱国者迷你USB硬盘（/dev/sdd）克隆，用DD命令，
前者Sector size 512 bytes, 后者是 4096 bytes.

DD if=/dev/sda of=/dev/sdd bs=试过不同的值

将近三小时，完成后。将 /dev/sdd这块USB硬盘外接到另一台笔记本，设USB启动时提示“没有USB引导设备”，
但是这台笔记本可以用U盘的Ubuntu liveCD进入Ubuntu。

第二次跪求诸位指点迷津，我不想装了系统再倒文件，直接想把磁盘复制一个省事。

fdisk -l 信息如下
freedom@freedom-desktop:~$ sudo fdisk -l /dev/sda

Disk /dev/sda: 160.0 GB, 160000000000 bytes
255 heads, 63 sectors/track, 19452 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xccffa682

Device Boot Start End Blocks Id System
/dev/sda1 * 1 12 96358+ 83 Linux
/dev/sda2 13 1245 9904072+ 83 Linux
/dev/sda3 1246 15805 116953200 f W95 Ext'd (LBA)
/dev/sda4 15806 19452 29294527+ 7 HPFS/NTFS
/dev/sda5 1246 3735 20000893+ 83 Linux
/dev/sda6 3736 8715 40001818+ 83 Linux
/dev/sda7 8716 15805 56950393+ 83 Linux

freedom@freedom-desktop:~$ sudo fdisk -l /dev/sdd
Note: sector size is 4096 (not 512)
Warning: ignoring extra data in partition table 5
Warning: ignoring extra data in partition table 5
Warning: ignoring extra data in partition table 5
Warning: invalid flag 0x1428 of partition table 5 will be corrected by w(rite)

Disk /dev/sdd: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 2432 cylinders
Units = cylinders of 16065 * 4096 = 65802240 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xccffa682

Device Boot Start End Blocks Id System
/dev/sdd1 * 1 12 770868 83 Linux
Partition 1 does not start on physical sector boundary.
/dev/sdd2 13 1245 79232580 83 Linux
Partition 2 does not start on physical sector boundary.
/dev/sdd3 1246 15805 935625600 f W95 Ext'd (LBA)
Partition 3 does not start on physical sector boundary.
/dev/sdd4 15806 19452 234356220 7 HPFS/NTFS
Partition 4 does not start on physical sector boundary.
/dev/sdd5 ? 74676 158510 1092163824 28 Unknown
Partition 5 does not start on physical sector boundary.

作者: 550512897 发布时间: 2011-12-04

问题在这里：

引用:

Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

台式机启动

代码:

sudo update-grub

会有移动盘启动项，用移动盘启动

代码:

sudo grub-install /dev/sdd
sudo update-grub

还不行可试试用gparted对移动硬盘重新分区，Align to Cylinder，参考：
viewtopic.php?f=77&t=281505

cp -ax 到对应移动硬盘。
台式机启动

代码:

sudo update-grub

会有移动盘启动项，用移动盘启动

代码:

sudo grub-install /dev/sdd
sudo update-grub