USB 2 HDD - Storage

This is a discussion on USB 2 HDD - Storage ; Hi Group While using a USB 2 enclosure and 2.5" 40Gig HDD the PC hangs while booting. The drive works well if plugged in hot. Is this a common problem? TIA Greg...

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Thread: USB 2 HDD

  1. USB 2 HDD

    Hi Group

    While using a USB 2 enclosure and 2.5" 40Gig HDD the PC hangs while
    booting.

    The drive works well if plugged in hot.

    Is this a common problem?

    TIA

    Greg





  2. Re: USB 2 HDD

    In article <42301633$1@news.comindico.com.au>,
    gregory arthur wrote:
    >Hi Group
    >
    >While using a USB 2 enclosure and 2.5" 40Gig HDD the PC hangs while
    >booting.
    >
    >The drive works well if plugged in hot.
    >
    >Is this a common problem?


    Would help to know some details about Operating System, etc.

    Speculation: many varieties of Linux, including RedHat 9,
    and Fedora Core [123] use volume labels to identify partitions
    for mounting. If both your resident drive and your external
    drive have a partition with label "/" and /etc/fstab contains
    a line to mount drive label "/" on mount point "/" the boot
    process will hang.

    Hotplug mounting does not have this problem, since the root file
    system is already mounted, and the newly added device will be
    mounted at a point such as "/media/usbdisk".

    carl

    --
    carl lowenstein marine physical lab u.c. san diego
    clowenst@ucsd.edu

  3. Re: USB 2 HDD

    > Speculation: many varieties of Linux, including RedHat 9,
    > and Fedora Core [123] use volume labels to identify partitions
    > for mounting.


    Windows uses the PnP IDs to map the USB drive to the drive letter.

    The PnP ID for USB is composed from the device's config descriptor, which
    usually contains the unique serial number. If your drive is such - then you
    will see the same drive letter for your USB drive if you will insert it over
    and over again.

    But, if the drive does not support USB unique ID (and the USB spec allows
    this) - then you will have a "New Device Detected" work of user-mode PnP
    service on each insert. The drive letter will be assigned automatically in this
    case.

    --
    Maxim Shatskih, Windows DDK MVP
    StorageCraft Corporation
    maxim@storagecraft.com
    http://www.storagecraft.com



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