CentOS - Sep 2008 - USB flash drive and VMs (Was Curmudgeoning)

Anne Wilson <cannewilson at googlemail.com> wrote:
> Can't argue with you  :-)   It does seem likely, as 1GB flash drives
wouldn't
> have been a possibility at that time.  I never owned one at all until 
> relatively recently.
>
>   
>>> > > They didn't work in 98 first edition, nor in NT4 or
Win2000 - again, from
>>> > > memory, which could be faulty.
>>>       
>> >
>> >  In Win2k, Micro$oft finally got up to speed and most flash drives
>> > will work with it, but XP is better.
>> >
>>     
> Fair enough.  Out of curiosity - do they work in W2K out of the box, or 
> require some update?  I ask because I'm considering W2K as a 
> VM.
>
> Anne
Flash support under qemu seems to be about the same as CD-ROM support.  
That is, you can access a device present at start up but it's not 
swappable.  Given:

[dave at bend ~]# lsusb
Bus 001 Device 002: ID 154b:0005 PNY
Bus 001 Device 001: ID 0000:0000 
Bus 002 Device 001: ID 0000:0000 

you can attach the device to a W2K qemu session by starting qemu with 
something like:

qemu -usb -usbdevice tablet -hda w2k.img -usbdevice host:001.002 -m 256 
-localtime &

I tried swapping two different 1GB thumb drives and the content of the 
drive wasn't visible after the swap.

If you decide to go the qemu route for a VM with W2K, I wrote about the 
problems I ran into on my blog at:

http://davenjudy.org/wordpress/?p=29

Getting a basic W2K VM working was fairly easy but getting it fully 
updated was a real pain.  I still have a couple of MS updates that I 
can't apply since W2K stops working if I do.

Cheers,
Dave

-- 
Politics, n. Strife of interests masquerading as a contest of principles.
-- Ambrose Bierce

On Wednesday 03 September 2008 16:41:18 David G. Miller
wrote:
> Anne Wilson <cannewilson at googlemail.com> wrote:
> > Can't argue with you  :-)   It does seem likely, as 1GB flash
drives
> > wouldn't have been a possibility at that time.  I never owned one
at all
> > until relatively recently.
> >
> >>> > > They didn't work in 98 first edition, nor in NT4
or Win2000 -
> >>> > > again, from memory, which could be faulty.
> >> >
> >> >  In Win2k, Micro$oft finally got up to speed and most flash
drives
> >> > will work with it, but XP is better.
> >
> > Fair enough.  Out of curiosity - do they work in W2K out of the box,
or
> > require some update?  I ask because I'm considering W2K as a
> > VM.
> >
> > Anne
>
> Flash support under qemu seems to be about the same as CD-ROM support.
> That is, you can access a device present at start up but it's not
> swappable.  Given:
>
> [dave at bend ~]# lsusb
> Bus 001 Device 002: ID 154b:0005 PNY
> Bus 001 Device 001: ID 0000:0000
> Bus 002 Device 001: ID 0000:0000
>
> you can attach the device to a W2K qemu session by starting qemu with
> something like:
>
> qemu -usb -usbdevice tablet -hda w2k.img -usbdevice host:001.002 -m 256
> -localtime &
>
> I tried swapping two different 1GB thumb drives and the content of the
> drive wasn't visible after the swap.
>
> If you decide to go the qemu route for a VM with W2K, I wrote about the
> problems I ran into on my blog at:
>
> http://davenjudy.org/wordpress/?p=29
>
> Getting a basic W2K VM working was fairly easy but getting it fully
> updated was a real pain.  I still have a couple of MS updates that I
> can't apply since W2K stops working if I do.
>
Thanks Dave.  I'm pushed for time just at the moment, but I do hope to try 
something like this in a few days.  If I go for qemu I'll use your notes for
guidance.

I don't think I'd bother updating W2K.  I don't intend doing any
work other
than the embroidery machine software, so it shouldn't be vulnerable to 
Internet nasties.

Anne


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On Wed, Sep 3, 2008 at 12:41 PM, David G. Miller <dave at davenjudy.org>
wrote:
> Anne Wilson <cannewilson at googlemail.com> wrote:
>
>> Can't argue with you  :-)   It does seem likely, as 1GB flash
drives
>> wouldn't have been a possibility at that time.  I never owned one
at all
>> until relatively recently.
>>
>>
>>>>
>>>> > > They didn't work in 98 first edition, nor in NT4
or Win2000 - again,
>>>> > > from
>>>> > > memory, which could be faulty.
>>>>
>>>
>>> >
>>> >  In Win2k, Micro$oft finally got up to speed and most flash
drives
>>> > will work with it, but XP is better.
>>> >
>>>
>>
>> Fair enough.  Out of curiosity - do they work in W2K out of the box, or
>> require some update?  I ask because I'm considering W2K as a VM.
>>
>> Anne
>
> Flash support under qemu seems to be about the same as CD-ROM support. 
That
> is, you can access a device present at start up but it's not swappable.
You can swap cdrom from qemu monitor. I haven't tried, but I think the
same thing can be applied to usb..

-- 
Marcelo

"?No ser? acaso que ?sta vida moderna est? teniendo m?s de moderna que
de vida?" (Mafalda)

"Marcelo Roccasalva" <marcelo-centos at irrigacion.gov.ar>
wrote:
> > Flash support under qemu seems to be about the same as CD-ROM support.
That
> > is, you can access a device present at start up but it's not
swappable.
>   
>
> You can swap cdrom from qemu monitor. I haven't tried, but I think the
> same thing can be applied to usb..
It looks like the qemu monitor should let you either eject the device or 
delete/add the USB drive using usb_del and usb_add.  I wasn't able to 
get it to work.  W2K gives me a control to unmount the thumb drive in 
the system tray which makes the drive "disappear" from W2K.  
Unfortunately, attaching a new drive or just reattaching the old drive 
isn't recognized by W2K.  qemu monitor tells me it unable to add the new 
device or delete the old device.

If hot swapping a USB drive can be made to work with qemu, swapping a 
USB drive will still be ugly.  The USB device number assigned by the 
kernel changes each time I swap thumb drives.  This isn't too bad but 
access to /proc/bus/usb/<usb_bus_number>/<usb_dev_number> is
root:root
with permissions rw-r--r--.  This means that each time I swap the drive 
I have to chmod the "new" USB device entry.  I don't see this
changing
even if I can get qemu to let me add the new device.

I'll have to try using qemu monitor to swap a CD-ROM at some point in 
the future.  Usually I only use W2K and IE under qemu to access those 
few sites that still only work with IE (e.g., my state's income tax site).

Cheers,
Dave

-- 
Politics, n. Strife of interests masquerading as a contest of principles.
-- Ambrose Bierce