T400 | x220 correct steps to enable ahci

Some time ago, the hard disk space was not enough. The original configuration was x220, 128 M4. Now I doubled the capacity and started with a 256 GB disk.
Why choose micron M4-256 SSD, the reason is so.
1: x220 supported firstSATA6 Gbps, so you need to find an SSD that supports this specification.
2: micron is a famous memory chip, particle manufacturer, and professional match.
3: Finally, this M4-256 supports 9MM to 7 MM (remove the black plastic basket in the middle of the hard disk on the line)
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Everything on the hard disk is satisfactory. The 64-bit win7 system, second-on and second-off are perfect. However, the read/write speed tested with the as SSD software is always very slow. The write speed is acceptable, 270 MB, but the reading speed is slow, only over 300 MB, which is very different from the official data's MB. So I began to find the reason.
1: Upgrade the firmware of the M4-256, very easy to download the firmware corresponding to the http://www.crucial.com/support/firmware.aspx. Dial, start the disc, press enter, and yes. To the latest version 0309. After the restart, the test and speed remain unchanged.
2: The left side of as_ssd_benchmark has a red pciide-bad,Just try to open ahci..
3: I thought it was very simple. I didn't expect the official team to be really irresponsible.
Http://support.lenovo.com/en_US/downloads/default.page? Find

[Url =] storage [/url]

Select

Intel rapid storage technology driver

Not very large, according to official instructions, upgrade driver, no response, prompt is the latest driver, no need to upgrade,Failed.
The upgrade procedure is as follows:
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Upgrade and install:
1. log on to the Windows operating system as an administrator.
2. Double-click the driver you downloaded, and the driver will be decompressed to the following locations on the hard disk: C: \ drivers \ win \ IRST.
3. Open the Device Manager.
4. Double-click ide ATA/atapi controllers or storage controllers.
5. Double-click a device.
Standard ahci 1.0 Serial ATA Controller
Intel (r) 5 Series 6 port SATA ahci Controller
Intel (r) ICH8M-E/ICH9M-E/5 Series sata raid Controller
6. Click the driver tab, and then click Update driver...
7. browse to the specified installation location and specify the path c: \ drivers \ win \ IRST to be decompressed in step 1 (note that "include subfolders" is selected ").

Windows XP installation:
1. Press F1 to enter the bios, change the option to compatibility in config-> select Serial ATA (SATA), and press F10 to save and exit.
2. Install Windows XP and Service Pack 2.
3. log on to the Windows XP operating system as an administrator.
4. Double-click the driver you downloaded, and the driver will be decompressed to the following locations on the hard disk: C: \ drivers \ win \ IRST.
5. Open the c: \ drivers \ win \ IRST \ prepare directory and double-click Install. cmd.
6. restart the computer and Press F1 to enter the BIOS. In config-> select Serial ATA (SATA), change the option to ahci, and press F10 to save and exit.
7. after entering the system, right-click the PCI device under the IDE ata controller in the Device Manager, select Update driver, select the specified location for installation, and specify to C: search for the \ drivers \ win \ IRST directory and install it.
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Don't be discouraged, find the key steps below, help a lot of friends find t420 | x220 | w520 and other series of machines to open ahci methods.
1: When the SATA mode in BIOS is IDE, enter Regedit in the running system, open the Registry Editor, and open the Registry in sequence, modify start in HKEY_LOCAL_MACHINE \ SYSTEM \ controlset001 \ Services \ msahci and change 3 to 0.
2: restart and change to the ahci mode in bios. after entering the system, you will find new hardware. Ignore this and install the ahci driver OK directly (directly follow the steps given by Lenovo's official website above)

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After ahci is enabled and the driver is installed, the score of as_ssd_benchmark test is accurate, with more than 270 writes and more than 500 reads. Please note that this is not the concept of score, but the performance improvement of real gold and silver. The testing system of win7 is 7.5 points before ahci is enabled, and 7.9 points after ahci is activated.

For all the steps that need to be solved, x200 | t420 | t420s | w520 machine users cannot open ahci.