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I have an external hard drive. While I am not reading or writing any data to the hard drive can I directly unplug the device? Will this practice damage the hard drive? If any data is corrupted due to this practice that is not a problem for me. Will this practice damage my hard drive?

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  • What sort of device is it?
    – Ramhound
    Mar 14, 2013 at 16:41
  • I have a sata 320gb external hard drive.
    – NewUser
    Mar 14, 2013 at 16:41
  • @DibyaRanjan - You should always safely remove any device that has files on it.
    – Ramhound
    Mar 15, 2013 at 2:09

2 Answers 2

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By default, most operating systems use what's called write caching to get better performance out of your computer. When you write a file to another drive—like a flash drive—the OS waits to actually perform those actions until it has a number of requests to fulfill, and then it fulfills them all at once (this is more common when writing small files). When you hit that eject button, it tells your OS to flush the cache—that is, make sure all pending actions have been performed—so you can safely unplug the drive without any data corruption.

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If you choose "Quick removal", which disables write caching, the chances of data loss are decreased.

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  • I can live with data loss. Will this result in damaging the hard drive?
    – NewUser
    Mar 14, 2013 at 16:31
  • @DibyaRanjan Spinning disks do not like when power is abruptly cut off from the device, and by ejecting the device first you can allow Windows to park the read/write heads off to the side so no damage occurs.
    – CC Inc
    Mar 14, 2013 at 16:32
  • Which means if the disk is still spinning when you cut the power/remove it, there is a chance of damage only to the files. I doubt the hard drive itself could be physically damaged.
    – CC Inc
    Mar 14, 2013 at 16:33
  • If no operation is going on the harddrive will it keep spinning?
    – NewUser
    Mar 14, 2013 at 16:38
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    @DibyaRanjan No, the hard drive will not spin if there is no operation being preformed.
    – CC Inc
    Mar 14, 2013 at 16:40
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Drives manufactured since at least the mid-1990s have auto-parking features. The oldest 320 GB drive out there is newer than that.

Given your lack of concern about data loss, you do not need to worry about the process of safely removing your disks.

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