Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

Why do I need to press "safely remove hardware" when removing a USB?


  • Please log in to reply
6 replies to this topic

#1 Lloyd T

Lloyd T

  • Members
  • 853 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Canada
  • Local time:03:46 PM

Posted 18 October 2008 - 09:47 AM

Why do I have to?

BC AdBot (Login to Remove)

 


#2 usasma

usasma

    Still visually handicapped (avatar is memory developed by my Dad


  • BSOD Kernel Dump Expert
  • 25,091 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Southeastern CT, USA
  • Local time:03:46 PM

Posted 18 October 2008 - 10:24 AM

To prevent corrupting any data that may be being written to the drive. Windows sometimes will write stuff even when it's not obvious that something is running.

For example, if you remove a flash drive from an XP computer without using it - then stick it in a Vista computer - Vista will report an issue with the drive and will ask to fix it. Repeatedly doing this (I've done it) will eventually cause a loss of data on the flash drive.

Here's Microsoft's take on it: http://support.microsoft.com/kb/818788/en-us
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able.

- John  (my website: http://www.carrona.org/ )**If you need a more detailed explanation, please ask for it. I have the Knack. **  If I haven't replied in 48 hours, please send me a message. My eye problems have recently increased and I'm having difficult reading posts. (23 Nov 2017)FYI - I am completely blind in the right eye and ~30% blind in the left eye.<p>If the eye problems get worse suddenly, I may not be able to respond.If that's the case and help is needed, please PM a staff member for assistance.

#3 Lloyd T

Lloyd T
  • Topic Starter

  • Members
  • 853 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Canada
  • Local time:03:46 PM

Posted 18 October 2008 - 11:50 AM

Does that just apply to USB's with storage or does it apply to all USB devices (like my Wireless Adapter)?

#4 usasma

usasma

    Still visually handicapped (avatar is memory developed by my Dad


  • BSOD Kernel Dump Expert
  • 25,091 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Southeastern CT, USA
  • Local time:03:46 PM

Posted 18 October 2008 - 12:12 PM

There's actually 2 separate issues here - one is the system reading/writing data, and the other is the abrupt interruption of power.
While I wouldn't especially worry about the loss of data in this case, I would wonder if the manufacturer of the device has provided protection for "surprise removal" of a device.

From my reading, it seems that most manufacturer's were encouraged (by Microsoft) to account for this around the time that Windows XP was released. I'd suggest researching the removal process for your wireless adapter at the manufacturer's website.
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able.

- John  (my website: http://www.carrona.org/ )**If you need a more detailed explanation, please ask for it. I have the Knack. **  If I haven't replied in 48 hours, please send me a message. My eye problems have recently increased and I'm having difficult reading posts. (23 Nov 2017)FYI - I am completely blind in the right eye and ~30% blind in the left eye.<p>If the eye problems get worse suddenly, I may not be able to respond.If that's the case and help is needed, please PM a staff member for assistance.

#5 cryptodan

cryptodan

    Bleepin Madman


  • Members
  • 21,868 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Catonsville, Md
  • Local time:07:46 PM

Posted 18 October 2008 - 12:22 PM

Just remember removing a device that is currently powered on can cause it to short out thus losing the device.

#6 Guest_BlackBurst_*

Guest_BlackBurst_*

  • Guests
  • OFFLINE
  •  

Posted 18 October 2008 - 02:59 PM

if "write-behind caching" is enabled on the flash drive (I think that's what it's called), then the system will hold edits to the flash drive in RAM until it's ready to commit the changes to the flash drive.
If you don't safely remove the flash drive, you could easily take out the drive before the edits to the drive have been saved. This could very easily corrupt something on the drive. Or at least you could
lose data that you have edited.

#7 usasma

usasma

    Still visually handicapped (avatar is memory developed by my Dad


  • BSOD Kernel Dump Expert
  • 25,091 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Southeastern CT, USA

Posted 18 October 2008 - 03:05 PM

It's also affected by the file system that the drive is formatted in. FAT32 is relatively straight-forward, but NTFS and other "journaling" file systems will add some compexity to this.
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able.

- John  (my website: http://www.carrona.org/ )**If you need a more detailed explanation, please ask for it. I have the Knack. **  If I haven't replied in 48 hours, please send me a message. My eye problems have recently increased and I'm having difficult reading posts. (23 Nov 2017)FYI - I am completely blind in the right eye and ~30% blind in the left eye.<p>If the eye problems get worse suddenly, I may not be able to respond.If that's the case and help is needed, please PM a staff member for assistance.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users