Internal SATA hard disk shows up as removable device on Windows 7

Internal SATA hard disk shows up as removable device on Windows 7 I am running Windows 7 on an Acer Aspire M7720 with three internal SATA drives; drive #2 and #3 are on a removable HDD rack.
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Total answers/comments: 2

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Guest [Entry]

This happens if the SATA controller is set to AHCI mode. AHCI supports hot swapping, and because of this, you can ask Windows to "Safely Remove" an internal hard disk, disconnecting it from the OS and replace it without having to power down the system.

Guest [Entry]

"This usually indicates that not all required drivers are installed on a system. For example, on Intel chipset you need to install Rapid Storage Technology driver. After that, hard drives are identified correctly as not removable.

Be aware however that this driver installation procedure can trigger Re-Activation for some software applications."