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From: coltrane on 10 Jun 2010 17:46
I know this isn't the place for a dvd problem but I ran out of places to
seek help.
I have an asus dvd drive that is supposed to read at 48x. I have been
importing music cds into itunes and at first the reads were reaching 40x
which I was quite happy with. I had stopped importing music to copy some
data from other dvds. One of the dvd was defective and the copy returned
a checksum error. One note is that during the copy of this disk the copy
froze for a long time at the point of the error before the copy finally
returned the error. I then resumed importing music cds into itunes. At
this point cds were no longer being read at ~40x but now were being read
at ~7x. I tried to reinstall the driver with no luck. I also tried using
Nero's DriveSpeed program to set the speed back to 48x but that didn't
work.
This is a sata drive if that might have anything to do with anything.

if either you can help or know where I could look for help for help I
would appreciate the feedback.

thanks

john
From: Rob on 11 Jun 2010 07:08

"coltrane" <tendengarci(a)yahoo.com> wrote in message
news:4c115d43$0$22506$607ed4bc(a)cv.net...
>I know this isn't the place for a dvd problem but I ran out of places to
>seek help.
> I have an asus dvd drive that is supposed to read at 48x. I have been
> importing music cds into itunes and at first the reads were reaching 40x
> which I was quite happy with. I had stopped importing music to copy some
> data from other dvds. One of the dvd was defective and the copy returned a
> checksum error. One note is that during the copy of this disk the copy
> froze for a long time at the point of the error before the copy finally
> returned the error. I then resumed importing music cds into itunes. At
> this point cds were no longer being read at ~40x but now were being read
> at ~7x. I tried to reinstall the driver with no luck. I also tried using
> Nero's DriveSpeed program to set the speed back to 48x but that didn't
> work.
> This is a sata drive if that might have anything to do with anything.
>
> if either you can help or know where I could look for help for help I
> would appreciate the feedback.

When windows detects a data error (such a CRC) on such devices,
it can drop the operating mode of a device from a UDMA (fast) mode
to PIO (slow) mode without telling you.
What version of windows are you using?
If it is this, what might work is to remove the device in Device Manager
and reboot. Windows will re-detect the device and re-install the drivers.
HTH,
--
Rob


From: coltrane on 11 Jun 2010 07:27
On 6/11/2010 7:08 AM, Rob wrote:
> "coltrane"<tendengarci(a)yahoo.com> wrote in message
> news:4c115d43$0$22506$607ed4bc(a)cv.net...
>> I know this isn't the place for a dvd problem but I ran out of places to
>> seek help.
>> I have an asus dvd drive that is supposed to read at 48x. I have been
>> importing music cds into itunes and at first the reads were reaching 40x
>> which I was quite happy with. I had stopped importing music to copy some
>> data from other dvds. One of the dvd was defective and the copy returned a
>> checksum error. One note is that during the copy of this disk the copy
>> froze for a long time at the point of the error before the copy finally
>> returned the error. I then resumed importing music cds into itunes. At
>> this point cds were no longer being read at ~40x but now were being read
>> at ~7x. I tried to reinstall the driver with no luck. I also tried using
>> Nero's DriveSpeed program to set the speed back to 48x but that didn't
>> work.
>> This is a sata drive if that might have anything to do with anything.
>>
>> if either you can help or know where I could look for help for help I
>> would appreciate the feedback.
>
> When windows detects a data error (such a CRC) on such devices,
> it can drop the operating mode of a device from a UDMA (fast) mode
> to PIO (slow) mode without telling you.
> What version of windows are you using?
> If it is this, what might work is to remove the device in Device Manager
> and reboot. Windows will re-detect the device and re-install the drivers.
> HTH,
I am running windows xp.
I did try removing the device from the device manager, rebooting and
adding the device. this did not seem to do the trick. It does seem to be
what you describe though. I thought that by trying to read the disc with
the error it put drive into another mode. That is the only thing that
makes any sense. I can't seem to find anything on what that might be.
Argh!

thanks for the reply
From: Rob on 11 Jun 2010 11:16

"coltrane" <tendengarci(a)yahoo.com> wrote in message
news:4c121d71$0$31280$607ed4bc(a)cv.net...
> On 6/11/2010 7:08 AM, Rob wrote:
>> "coltrane"<tendengarci(a)yahoo.com> wrote in message
>> news:4c115d43$0$22506$607ed4bc(a)cv.net...
>>> I know this isn't the place for a dvd problem but I ran out of places to
>>> seek help.
>>> I have an asus dvd drive that is supposed to read at 48x. I have been
>>> importing music cds into itunes and at first the reads were reaching 40x
>>> which I was quite happy with. I had stopped importing music to copy some
>>> data from other dvds. One of the dvd was defective and the copy returned
>>> a
>>> checksum error. One note is that during the copy of this disk the copy
>>> froze for a long time at the point of the error before the copy finally
>>> returned the error. I then resumed importing music cds into itunes. At
>>> this point cds were no longer being read at ~40x but now were being read
>>> at ~7x. I tried to reinstall the driver with no luck. I also tried using
>>> Nero's DriveSpeed program to set the speed back to 48x but that didn't
>>> work.
>>> This is a sata drive if that might have anything to do with anything.
>>>
>>> if either you can help or know where I could look for help for help I
>>> would appreciate the feedback.
>>
>> When windows detects a data error (such a CRC) on such devices,
>> it can drop the operating mode of a device from a UDMA (fast) mode
>> to PIO (slow) mode without telling you.
>> What version of windows are you using?
>> If it is this, what might work is to remove the device in Device Manager
>> and reboot. Windows will re-detect the device and re-install the
>> drivers.
>> HTH,
> I am running windows xp.
> I did try removing the device from the device manager, rebooting and
> adding the device. this did not seem to do the trick. It does seem to be
> what you describe though. I thought that by trying to read the disc with
> the error it put drive into another mode. That is the only thing that
> makes any sense. I can't seem to find anything on what that might be.
> Argh!
>

I missed the fact that it was a SATA drive when I first replied. Hmm,
not sure how the access modes work with SATA optical drives - PIO
mode only relates to PATA, AFAIK.
I'm wondering if one of the two (one frequency for CD, another for DVD)
lasers has degraded. If it works near full speed with DVDs but slow with
CDs, it could be that I suppose.
HTH,
--
Rob


From: coltrane on 11 Jun 2010 11:57
On 6/11/2010 11:16 AM, Rob wrote:
> "coltrane"<tendengarci(a)yahoo.com> wrote in message
> news:4c121d71$0$31280$607ed4bc(a)cv.net...
>> On 6/11/2010 7:08 AM, Rob wrote:
>>> "coltrane"<tendengarci(a)yahoo.com> wrote in message
>>> news:4c115d43$0$22506$607ed4bc(a)cv.net...
>>>> I know this isn't the place for a dvd problem but I ran out of places to
>>>> seek help.
>>>> I have an asus dvd drive that is supposed to read at 48x. I have been
>>>> importing music cds into itunes and at first the reads were reaching 40x
>>>> which I was quite happy with. I had stopped importing music to copy some
>>>> data from other dvds. One of the dvd was defective and the copy returned
>>>> a
>>>> checksum error. One note is that during the copy of this disk the copy
>>>> froze for a long time at the point of the error before the copy finally
>>>> returned the error. I then resumed importing music cds into itunes. At
>>>> this point cds were no longer being read at ~40x but now were being read
>>>> at ~7x. I tried to reinstall the driver with no luck. I also tried using
>>>> Nero's DriveSpeed program to set the speed back to 48x but that didn't
>>>> work.
>>>> This is a sata drive if that might have anything to do with anything.
>>>>
>>>> if either you can help or know where I could look for help for help I
>>>> would appreciate the feedback.
>>>
>>> When windows detects a data error (such a CRC) on such devices,
>>> it can drop the operating mode of a device from a UDMA (fast) mode
>>> to PIO (slow) mode without telling you.
>>> What version of windows are you using?
>>> If it is this, what might work is to remove the device in Device Manager
>>> and reboot. Windows will re-detect the device and re-install the
>>> drivers.
>>> HTH,
>> I am running windows xp.
>> I did try removing the device from the device manager, rebooting and
>> adding the device. this did not seem to do the trick. It does seem to be
>> what you describe though. I thought that by trying to read the disc with
>> the error it put drive into another mode. That is the only thing that
>> makes any sense. I can't seem to find anything on what that might be.
>> Argh!
>>
>
> I missed the fact that it was a SATA drive when I first replied. Hmm,
> not sure how the access modes work with SATA optical drives - PIO
> mode only relates to PATA, AFAIK.
> I'm wondering if one of the two (one frequency for CD, another for DVD)
> lasers has degraded. If it works near full speed with DVDs but slow with
> CDs, it could be that I suppose.
> HTH,
well considering new drives cost $25 it seems like a new drive is the
answer. At this point I am more curious on what happened and I can't let
go of an unsolved problem. I repeat, argh!

thanks
john
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