Migrating your system disk to an SSD
Hardware
The mode of the SATA controller in the BIOS should be set to AHCI
, not IDE
; otherwise, Windows will use the wrong driver and you will have to go to the registry to fix the problem.
Also, your system should use a SATA III controller. Its predecessor, SATA II, handles only 300MBps, which is too slow for your SSD. Unfortunately, you might have to live with that speed if you have an on-board controller in a laptop.
The next step is partitioning. The best tool for partitioning is good old fdisk
and a pocket calculator, because you will need to specify size and boundaries of the partitions in terms of sector numbers. Table 1 shows an example partition table.
Table 1
Partitioning an SSD
Device | Boot | Start | End | Blocks | ID | System |
---|---|---|---|---|---|---|
/dev/sda1 |
* |
4096 |
3074047 |
1536000 |
7 |
HPFS/NTFS/exFAT |
/dev/sda2 |
3076096 |
212789247 |
104857600 |
7 |
HPFS/NTFS/exFAT |
|
/dev/sda3 |
213098496 |
240361471 |
13631488 |
7 |
HPFS/NTFS/exFAT |
|
/dev/sda4 |
240361472 |
781422767 |
270530648 |
5 |
Extended |
|
/dev/sda5 |
240365568 |
252948479 |
6291456 |
82 |
Linux Swap/Solaris |
|
/dev/sda6 |
252948480 |
781422767 |
264236120 |
83 |
Linux |
Partitioning
The start sector for each partition should be divisible by 4,096 without a remainder – for instance: 3,076,096/4,096 = 751. Note that if your partitions are organized in 4KB blocks and the start sectors fall at 4KB boundaries, you will end up with a small (4095-byte) gap between the end of one partition and the start of the next one. This gap is not a problem.
Copying
The next step is to copy the original disk. It is better to start by copying to an external disk, rather than copying directly to the SSD. If you copy to an external disk, any problems you have later will only affect the backup copy and won't trash the original source disk. The tool of choice is rsync
. Rsync needs a lot of command-line switches to preserve the access rights, time stamps, and other settings. Table 2 lists all the necessary options.
Table 2
Rsync Parameters
Option | Meaning |
---|---|
|
Transfer directories |
|
Preserve group |
|
Copy symlinks as symlinks |
|
Preserve owner |
|
Preserve permissions |
|
Recurse into directories |
|
No space-splitting |
|
Preserve modification times |
|
Verbose |
|
Preserve ACLs |
|
Preserve hard links |
|
Preserve extended attributes |
It is a good idea to boot from a rescue CD or USB stick before you start the copy process; otherwise, you have to exclude the mountpoint of the target disk (or you will end up in an endless loop). Furthermore, you need to exclude /proc
, or virtual files like /proc/kcore
will turn into giant physical files. The command
$ rsync -rvlpogdstHEAX /original /copy
initiates the copy process.
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