Re: [SLE] Re: USB Pen Drive - Enabling unmounting and other issues

From: Adam Vazquez Kb2jpd Mobile w/ Treo (adamvaz_at_earthlink.net)
Date: 08/19/05

  • Next message: Shriramana Sharma: "[SLE] Re: USB Pen Drive - Enabling unmounting and other issues" 
    To: Shriramana Sharma <samjnaa@gmail.com>, suse-linux-e@suse.com
Date: Fri, 19 Aug 2005 13:39:00 -0400

    The default strategy for removable mass memory storage devices is to not cache writes until there are a sizable amounts of writes and the driver/module has the delay-write implementation in its code.

    If in Win98, the user/admin had only two choices, make it a fixed drive with delayed cache writes for higher performance (remember the adjustment for cache on the 2x+ cdrom drives?) or a removable media drive with all writes flushed to disk.

    I would sync ;sync ;sync ; and then do a safe umount for the usb devices.

    I already porked a 512M SD Card in a SD read/writer in SuSE 9.2 and 9.3 and do not wish to repeat the expierence. BTW, it was porked by a Treo 650 and it can not be used properly.

    I wished someone who write a proper recover utility that does not blindly read the MS FAT descriptor block that is still telling me the SD card is now 256M of clusters of 1 byte size and no way of fixing it via software.

    And yes, I have tried all the linux software out there with no success.

    Adam SuSE 9.3

    -----Original Message-----

    From: Shriramana Sharma <samjnaa@gmail.com>
    Subj: [SLE] Re: USB Pen Drive - Enabling unmounting and other issues
    Date: Fri Aug 19, 2005 1:17 pm
    Size: 1K
    To: suse-linux-e@suse.com

    On 8/19/05, Christopher Shanahan <cshanahan@comcast.net> wrote:

    > On Friday 19 August 2005 09:57, Shriramana Sharma wrote:
    > > But then is the absence of this "unplug this device safely" feature in
    > > Windows 98 a suggestion that Win 98 actually handles the matter like
    > > Linux?
    >
    > No. To use a USB thumbdrive -- or any removable device -- in Win9x you have
    > to
    > install a driver specific to that device. If you've used a thumbdrive in
    > Win9x
    > than I'm sure you recall loading a device driver.

    Yes of course, but the point I was making was that I did not need to
    unmount (aka flushing write data to) the USB device in Windows, and
    was allowed to remove it once there's no program writing to it. Of
    course, I've also been told that under Win 2K or XP too I can do the
    same. I usually take the safe way out - humour Windows and use the
    "unplug safely" function.

    But my q still stands. How come Win 98 doesn't give me a tray app for
    unmounting the USB device? Of course, such a complaint is better on a
    Windows list, but still, if Win 98 could do it, Win 2K or Win XP could
    too, just tell the user that the device can be pulled out when there's
    no write operation.

    Similar situation exists (pulling out when no writing going on) in
    Linux, but I noticed that there are a couple of programs installed
    which do this - isn't KwikDisk for this? 

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