Quando eu conecto à porta USB 2.0 ou eSATA, ele começa a girar e apita duas vezes.
É possível que sua unidade não esteja recebendo energia suficiente:
Seagate and Maxtor-brand hard drives do not contain audio speakers. Some failure mechanisms may make a regular repeating beep from the computer's internal speaker. This may or not be hard drive related.
Check your system documentation for an explanation of system beep codes. If a drive failure is possible, it is always important to make an immediate backup.
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Troubleshooting noise issues for external drives:
External USB drive clicking and beeping can occur if the USB port does not provide enough power to operate the drive, often a USB 1.x port, or an unpowered USB hub. To resolve this noise, connect the drive with both of the USB connectors (if possible), or if your drive only has one connector, try connecting it to other USB ports on your computer. If that does not work, connect it to a powered USB hub to ensure enough electrical power.
The Seagate Portable, Seagate FreeAgent Go Classic, and Maxtor OneTouch mini drives, in particular, included a USB Y-cable with two USB connectors so that, if one USB port did not power the drive enough, it could be connected to a second USB port.
Fonte Identificando e solucionando problemas de ruído no disco rígido