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Thread: sustained HDD writes after formatting

  1. #1
    Join Date
    Feb 2007
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    sustained HDD writes after formatting

    Hi,

    I'm seeing sustained disk writes of about 2 MB/s in the indicator-multiload indicator in Unity. I determined that it is writes on my 500GB HDD on /dev/sdb. This behaviour started after I used Gparted to create a single 500GB ext4 partition and also selected that it should be formatted to ext4 in Gparted.

    Is this usual? It also survived a reboot.. I assume that it is the full formatting taking place in the background?

    I saw no activity using pidstat or iotop. Only using vmstat -d revealed the writes.

  2. #2
    Join Date
    May 2007
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    13,082

    Re: sustained HDD writes after formatting

    The Ext4 filesystem is a journaling filesystem -- so it routines writes to the filesystem in the background.

    Is this what is concerning you?
    Ubuntu 15.04 Mate, Mint 17.1; MS Win 8.1, Win10 TP.
    Will not respond to PM requests for support -- use the forums.

  3. #3
    psusi is offline Ubuntu addict and loving it
    Join Date
    Sep 2005
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    3,980
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    Ubuntu Development Release

    Re: sustained HDD writes after formatting

    Yes, mke2fs in 11.04 now defaults to a quick format and it is finished in the background.

  4. #4
    Join Date
    Feb 2007
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    Re: sustained HDD writes after formatting

    Thanks, I was just wondering as it was slightly unexpected for me.

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