[nSLUG] USB storage hot-swap question
fidomail2002 at yahoo.ca
Sat May 17 17:27:56 ADT 2008
Has anyone tried this with any USB stick other than the Kingston 2GB Data Traveler USB Flash Drive (DTI-2GBCR)? This problem might not be only on Linux OSes, and could be the reason that FutureShop is advertising a huge discount sale for these Kingston drives...
--- On Sat, 5/17/08, Mike Spencer <mspencer at tallships.ca> wrote:
> From: Mike Spencer <mspencer at tallships.ca>
> Subject: [nSLUG] Re: USB storage hot-swap question
> To: nslug at nslug.ns.ca
> Received: Saturday, May 17, 2008, 2:51 PM
> I wrote:
> me> But if I umount the [USB memory] device, unplug it
> and plug in
> me> another device, mount refuses to mount it, reporting
> that it is
> me> "is not a valid block device".
> And "George N. White III"
> <gnwiii at gmail.com> quoth:
> > I haven't seen this (on 22.214.171.124-92.fc8). The
> entry in
> > /proc/scsi/scsi disappears when the device is
> unplugged from the USB
> > connector.
> Oh. Well, I'm using a 2.4 kernel. USB webcam works as
> advertized and USB
> memory works but doesn't hot-swap properly.
> > A certain well-known direct vendor is notorious for
> USB ports that
> > don't behave.
> This is an IBM P3. "Type 6579 GJU" if the xternal
> sticker is to be
> > Do you see lines in /var/log/messages like:
> > May 17 14:41:50 cerberus kernel: usb 1-5: USB
> disconnect, address 4
> After unmounting and removing one device, then plugging in
> attempting to mount another, /var/log/messages has:
> May 17 15:23:09 bogus kernel: usb.c: USB disconnect on
> 00:1f.2-2 address 5
> May 17 15:23:28 bogus kernel: hub.c: new USB device
> assigned address 6
> May 17 15:24:02 bogus kernel: sda: Unit Not Ready,
> May 17 15:24:02 bogus kernel: sda: I/O error: dev
> 08:00, sector 0
> Does that tell you anything useful?
> > You might be interested in
> Yow! That makes it look like the whole USB matter is a can
> or worms
> under the hood. Browsing over it, I gather I should
> upgrade to a 2.6
> kernel RSN. Well, I just bought a used Dell P4 on which
> I'm going to
> install Slack 12/2.6 kernel. (Or was it Dell that you
> called "A
> certain well-known direct vendor...notorious for USB ports
> that don't
> So maybe I'll just live with this hot-plug annoyance
> until I have that
> up and running.
> - Mike
> Michael Spencer Nova Scotia, Canada
> mspencer at tallships.ca
> /( )\
> nSLUG mailing list
> nSLUG at nslug.ns.ca
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