CD writer and DVD/CD rom can't be shared in workgroup

[Ray]

I configured the CD writer and DVD/CD rom to be shared in workgroup on my
desktop running Windows XP Pro. All the users in workgroup can see the
drives but not allow to access. I have given the write access to everyone
Can someone advise the possible causes and fixes.

Thanks,

Ray

 

[Steve Winograd [MVP]]

I configured the CD writer and DVD/CD rom to be shared in workgroup on my
desktop running Windows XP Pro. All the users in workgroup can see the
drives but not allow to access. I have given the write access to everyone
Can someone advise the possible causes and fixes.

Thanks,

Ray

When you share a CD or DVD writer over a network, it's shared as a
read-only device, even if you've specified write access. It isn't
possible to write to it from another computer. An Ethernet network
connection can't supply data fast enough to support CD or DVD burning.
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com

 

[Nathan McNulty]

They don't need write access, they need read access.

 

[Kelly]

Hi Ray,

Try the edit on line 264 (right hand side)
http://www.kellys-korner-xp.com/xp_tweaks.htm

 

[Ray]

Kelly,

Should I apply it to the pc with CD-ROM drive or the pc to access the CD-ROM
drive. Thanks for your further advice.

Ray

 

[Mike Matheny]

Well, you're correct about not writing to the CD writer, but wrong about not
being able to supply data fast enough through a network - even the fastest
IDE subsystem cannot perform as fast as even a 10mb network.

 

[Steve Winograd [MVP]]

Well, you're correct about not writing to the CD writer, but wrong about not
being able to supply data fast enough through a network - even the fastest
IDE subsystem cannot perform as fast as even a 10mb network.

Are you sure about that, Mike? Here are the rated transfer speeds of
some systems:

Ultra ATA/33 IDE drive interface:
33 megabytes/second

Ultra ATA/66 IDE drive interface
66 megabytes/second

Ultra ATA/100 IDE drive interface
100 megabytes/second

10BaseT Ethernet:
10 megabits/second = 1.25 megabytes/second

100BaseTx (Fast) Ethernet
100 megabits/second = 12.5 megabytes/second

As I interpret those numbers, the slowest IDE disk is almost three
times faster than Fast Ethernet. Is that right?

I've measured actual speeds for disk copies over a Fast Ethernet
network, and the result is typically 50-70 megabits/second. That
involves reading one computer's disk and writing the other computer's
disk, and it's much faster than a 10 megabit/second network.
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com

 

[Kelly]

Hi Ray,

The former.

 

[Nathan McNulty]

It is important to note that most CD and DVD Writers can operate in DMA
Mode 2. This is 33 MegaBytes Per Second for the max throughput. The
only way you are going to be able to burn a DVD at anthing higher than
8x over a network is if the network is capable of transfering that
amount of data which would require a Gigabit Network.

Also important to note is that most of these hardware components only
operate at about 80% efficiency. This means with DMA Mode 2 (33 MB/s),
you really only get around 25 MB/s. Burning 16x DVD's requires about 22
MB/s.

One way to make sure that your DVD's and CD's are properly burned over
the network would be to limit the speed of writing to handle the amount
of data that can be transfered (and allow room for error as well). Here
are my suggestions for writing to a CD over a network:

For 10 MBit Networks:
CD Burn speed of 4x (Though 8x may be possible, I wouldn't recommend it)
DVD Burning will not work on a 10 MBit network

For 100 MBit Networks:
CD Burn speed of 52x (Full speed should be supported)
DVD Burn speed of 8x (May lower to 4x on high traffic networks)

 

[Steve Winograd [MVP]]

It is important to note that most CD and DVD Writers can operate in DMA
Mode 2. This is 33 MegaBytes Per Second for the max throughput. The
only way you are going to be able to burn a DVD at anthing higher than
8x over a network is if the network is capable of transfering that
amount of data which would require a Gigabit Network.

Also important to note is that most of these hardware components only
operate at about 80% efficiency. This means with DMA Mode 2 (33 MB/s),
you really only get around 25 MB/s. Burning 16x DVD's requires about 22
MB/s.

One way to make sure that your DVD's and CD's are properly burned over
the network would be to limit the speed of writing to handle the amount
of data that can be transfered (and allow room for error as well). Here
are my suggestions for writing to a CD over a network:

For 10 MBit Networks:
CD Burn speed of 4x (Though 8x may be possible, I wouldn't recommend it)
DVD Burning will not work on a 10 MBit network

For 100 MBit Networks:
CD Burn speed of 52x (Full speed should be supported)
DVD Burn speed of 8x (May lower to 4x on high traffic networks)

I hadn't thought of limiting the writing speed. Thanks for pointing
that out.
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com

 

[Ray]

Kelly,

I have run the program downloaded on the computer with CD writer and DVD rom
drives but the result remains unchanged. Is there any other way to fix it?
Or please let me know where I should check and/or modify the registry.

Thanks,

Ray

 

[Mike Matheny]

Sorry, from my experience on a 100 mb LAN (and this is at NASA, so it's not
idle!). Have never had a coaster burning from the network at top speed.

Mike

 

[Nathan McNulty]

I agree that on a high traffic network such as that, the burning speeds
should be lowered considerably. It is possible to allocate a percentage
of the network to allow for a dedicated transfer of this data, but that
would reduce the amount of bandwidth available to the rest of the network.

I am still unsure as to whether or not Windows will natively supports
buring a CD over a network. I do know that such programs exist as I have
tested them out. Take a look at Nero NET:
http://www.nero.com/us/631934399251526.html

 

[Mike Matheny]

Check out StarWind and StarPort from RocketDivision. Lets you share lots of
devices, including CDRW drives, and use them to read and write - uses ISCSI,
and I have tested it and it works great and is free!!!
http://www.rocketdivision.com/

 

[V Green]

Sharing a CD/DVD-RW over a network, even with third-party
software, is a bad idea.

you WILL produce coasters, as you CANNOT guarantee
that throughput over the network will be able to keep
up with the write speed of the drive.

it may seem like you can do it, as it's possible that the
network will be lightly loaded and you can keep up, but
the next time you try it may fail...

Think of it this way:

say you're writing stuff to the CD/RW on a networked
machine, all is well.

Then, 8 other users on your network simultaneously access files
on that same machine.

BOOM-network data throughput is suddenly split 9 ways
and you've just made a coaster...

 

[Anton Kolomyeytsev]

What a nonsense! Using modern GbE network hardware with throughoutput
of 125 MB/sec (OK, 117 MB/sec in single direction in practice) is
capable of handling even 22 MB/sec of 16X DVD burning speed with
absolutely no problem! And all of the devices manufactures during last
2-3 years have buffer underrung hardware preventing them from
producing "coasters" if for some reason data stream would be lost (in
your particular case network utilization would jump unexpected).

Somebody in this group has already mentioned our iSCSI target and
initiator software allowing to share storage devices AS IS (when iSCSI
target does NOT intrude into bypassing SCSI traffic eliminating
hardware virtualization layer all other iSCSI targets usually add),
including tape drives and CD/DVD burners. I've never heard any
complains about buffer underruns caused with network burns for years.

With your approach "stay away from..." I'd recommend you stay aways
from IT yourself. People following your advices would find themself in
the middle of nowhere. I guess (according to your e-mail) this is the
place where you came from

Regards,
Anton Kolomyeytsev

CEO, Rocket Division Software

 

[V Green]

What a nonsense! Using modern GbE network hardware with throughoutput
of 125 MB/sec (OK, 117 MB/sec in single direction in practice)

doubt that this user has this kind of network hardware.

most of us don't, we're still on 10/100BT.

is
capable of handling even 22 MB/sec of 16X DVD burning speed with
absolutely no problem! And all of the devices manufactures during last
2-3 years have buffer underrung hardware preventing them from
producing "coasters" if for some reason data stream would be lost (in
your particular case network utilization would jump unexpected).

Somebody in this group has already mentioned our iSCSI target and
initiator software allowing to share storage devices AS IS (when iSCSI
target does NOT intrude into bypassing SCSI traffic eliminating
hardware virtualization layer all other iSCSI targets usually add),
including tape drives and CD/DVD burners. I've never heard any
complains about buffer underruns caused with network burns for years.

Oh, I see why you're so ticked!

You have a software solution FOR SALE.

Excuuuuussee meeee!!!!!!

I think the OP just wants to know WHY he can't
do it with the burning support BUILT-IN to XP.

With your approach "stay away from..." I'd recommend you stay aways
from IT yourself. People following your advices would find themself in
the middle of nowhere. I guess (according to your e-mail) this is the
place where you came from

Whatever. Irrelevant. Goodbye.

Regards,
Anton Kolomyeytsev

CEO, Rocket Division Software



Sharing a CD/DVD-RW over a network, even with third-party
software, is a bad idea.

you WILL produce coasters, as you CANNOT guarantee
that throughput over the network will be able to keep
up with the write speed of the drive.

it may seem like you can do it, as it's possible that the
network will be lightly loaded and you can keep up, but
the next time you try it may fail...

Think of it this way:

say you're writing stuff to the CD/RW on a networked
machine, all is well.

Then, 8 other users on your network simultaneously access files
on that same machine.

BOOM-network data throughput is suddenly split 9 ways
and you've just made a coaster...

[/QUOTE]

 

[Anton Kolomyeytsev]

100 megabits are definitely enough for 52X CD burning. Learn math in
elementary school? Can multiply 150 and 52? I'll tell ya big secret,
even for 8X DVD burning it's still enough!

StarWind and StarPort and free for non-commercial use (we make enough
cash from big companies so are not greedy to take your last $20 you
mother gave you so you could buy a cheeseburger for your lunch).

No excuses for you, dude. Get your free lunch and go home. Prepare
your homework

P.S. Only idiots can blame free software with support, right?

Regards,
Anton Kolomyeytsev

CEO, Rocket Division Software

 

[Mike Matheny]

Thanx, Anton, for backing me up. You never know until you try it, and again,
what a superb product you put out! Thanx for not milking us little people!

 

[Anton Kolomyeytsev]

Mike,

thank you very much for your warm words! They are always in need in
our business (people usually contact developers when they have
problems and not just to say "hi! I like what you do!"). Wish you good
luck with iSCSI and network burning. And you're always welcomed to say
what you do in our support forums

Regards,
Anton Kolomyeytsev

CEO, Rocket Division Software