Turn off the power saver mode on the hard disks.

This tweak makes the disks not use the non-volatile (NV) cache power save mode and no power savings would be achieved.

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Description:
Microsoft has designed a hybrid drive that is currently supported only in vista. This drive uses a non-volatile (nv) cache to achieve faster boot and resume. A portion of most commonly used data is copied onto the nv cache which in turn minimizes dependency on the hard drive. Eventually, this speeds up performance of your system. Nv cache can also make hard disks switch to power saving mode. In this mode, the system tries to save power by aggressively spinning down the disk. However, if you do not wish switching to power saving mode which may have to compromise with the performance of the system, you turn off this mode. For this, go to start > run menu, enter regedit and navigate to the registry path listed below. If the subkey \nvcache does not exist, create it as explained below. Then, create a dword value enablepowermodestate in the right panel, and change its data value to 0. However, to turn on nv cache power saving feature, delete the subkey nvcache. The changes take effect after a restart or logoff.

Level: Recommended For Experts Only

First, click the 'Start' button, and select 'Run'. In the resulting dialog box, type 'regedit'.

Second, go to <b>[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\] </b> and create a new key as 'NvCache' under the key 'Windows'.

Next, create a DWORD value as 'EnablePowerModeState' under the key 'NvCache'.

Now, right click on the DWORD value 'EnablePowerModeState' and select 'Modify'.

Finally set the value data as '0' to turn off power saver mode on the hard disks and click 'OK'.