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  #1  
Old 01-28-2011, 08:31 PM
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Do you keep your maps disc in your nav?

As per title really... do you keep your maps disc loaded in the nav system, or do you keep it stored until needed?

My MKIV system seems pretty unstable with regards to the sat nav if i leave the disc in (normally gets stuck on 'please wait'), however it loads nearly everytime if i let the system boot up and insert the disc after. Anyone else get this?
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  #2  
Old 01-28-2011, 11:10 PM
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It stays in the drive 100% of the time. No reason to take it out.
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  #3  
Old 01-29-2011, 06:26 AM
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Guess my laser must be on its way out then. ive ordered a replacement now...

NEW Sanyo SF-HD4 black cover for DVD on eBay (end time 23-Feb-11 10:32:27 GMT)
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  #4  
Old 02-05-2011, 04:23 PM
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Originally Posted by Quicksilver View Post
It stays in the drive 100% of the time. No reason to take it out.
I believe the reason to take it out is to preserve the lens as it seems the dvd reader is always working no matter if you are using the navigation system or not. Personally I do not use the navigator so often unless I travel, so I prefer to take it out.
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Old 02-05-2011, 10:24 PM
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Originally Posted by vince59it View Post
I believe the reason to take it out is to preserve the lens as it seems the dvd reader is always working no matter if you are using the navigation system or not. Personally I do not use the navigator so often unless I travel, so I prefer to take it out.
I've had a disc in my MK IV nav computer since I got the car (September 2002 - the first month that DVD computers were used) and I haven't had any problems with the drive wearing out. I used to run backup copies of my map discs (and keep the original in the glove box) because I was worried what might happen to the disc when the car hit a pothole. But given how twitchy that drive is with burned discs - and never having a disc damaged - I went back to using the original in the drive.
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Old 03-14-2011, 11:16 PM
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i personally think that using a burned disc that is of questionable quality can overwork the laser in several re-read attempts and hasten the wear on it. however, if you use a high quality burn (slow speed, high quality DVD+R media) it should be just fine. i've left a very low quality disc in the MK4 for several years without problems. but in helping others with their MK4 upgrades, I've seen some units that will no longer read or have trouble reading the low quality burns. but once i make an image of the DVD and re-burn it to high quality media, the unit took it just fine. in light of that, even though I hadn't seen any problems, i switched my disc to a high quality one and leave it in the MK4 at all times.
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Old 03-15-2011, 08:02 AM
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Quote:
Originally Posted by Terry Kennedy View Post
I've had a disc in my MK IV nav computer since I got the car (September 2002 - the first month that DVD computers were used) and I haven't had any problems with the drive wearing out. I used to run backup copies of my map discs (and keep the original in the glove box) because I was worried what might happen to the disc when the car hit a pothole. But given how twitchy that drive is with burned discs - and never having a disc damaged - I went back to using the original in the drive.
I agree, BTW as long as the CD/DVD (original or copy) stays in the unit, the unit works and when the unit works it wears. easy and simple to me. I see the disavantage of putting back the vd into the unit qhen u need it, But this is the only way to save wearing of the unit.
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Old 03-15-2011, 09:18 AM
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Originally Posted by bimmerluv View Post
i personally think that using a burned disc that is of questionable quality can overwork the laser in several re-read attempts and hasten the wear on it. however, if you use a high quality burn (slow speed, high quality DVD+R media) it should be just fine. i've left a very low quality disc in the MK4 for several years without problems. but in helping others with their MK4 upgrades, I've seen some units that will no longer read or have trouble reading the low quality burns. but once i make an image of the DVD and re-burn it to high quality media, the unit took it just fine. in light of that, even though I hadn't seen any problems, i switched my disc to a high quality one and leave it in the MK4 at all times.
What brands would you call 'high quality'?
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  #9  
Old 03-15-2011, 10:19 AM
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Originally Posted by R2D2 View Post
What brands would you call 'high quality'?
my understanding is that quality of DVD media can't be judged by brand, as many brands are just re-labels of various quality media. however, the discs themselves have an internal media ID which gives some indication of the actual manufacturer. and generally speaking, it seems that the media manufactured by JVC Taiyo Yuden & Mitsubishi Chemical seem to have the highest quality. Taiyo Yuden use to only manufacturer for other brands, but it seems lately they are selling direct to retail now too.

In association to "brands", Verbatim has had a good reputation of using either JVC Taiyo Yuden or Mitsubishi as their manufacturer. So, if you have to go by "brand", then Verbatim might be the way to go. However, you might still want to check the media ID of whatever batch of discs you get. There are some "cheaper" Verbatim that might not be as high quality.

On another note, DVD+R media seems to be better than DVD-R. There are various technical reasons that one can read about online/google. However, for me the most convincing argument is that every bit stored on DVD+R is protected by parity/error correction while on DVD-R, only about 3/4 of the bits are protected. This means higher chance of unrecoverable read errors with DVD-R compared to DVD+R.

I have an old batch of DVD+R with media ID "SONY/D21" that seem to be of high quality, but I didn't mention it above because they are no longer being manufactured. But if you have some older SONY brand DVD media from pre-2010, check the media ID. There are free programs online that one can use to check the media ID.
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  #10  
Old 03-15-2011, 11:48 AM
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Quote:
Originally Posted by bimmerluv View Post
my understanding is that quality of DVD media can't be judged by brand, as many brands are just re-labels of various quality media. however, the discs themselves have an internal media ID which gives some indication of the actual manufacturer. and generally speaking, it seems that the media manufactured by JVC Taiyo Yuden & Mitsubishi Chemical seem to have the highest quality. Taiyo Yuden use to only manufacturer for other brands, but it seems lately they are selling direct to retail now too.

In association to "brands", Verbatim has had a good reputation of using either JVC Taiyo Yuden or Mitsubishi as their manufacturer. So, if you have to go by "brand", then Verbatim might be the way to go. However, you might still want to check the media ID of whatever batch of discs you get. There are some "cheaper" Verbatim that might not be as high quality.

On another note, DVD+R media seems to be better than DVD-R. There are various technical reasons that one can read about online/google. However, for me the most convincing argument is that every bit stored on DVD+R is protected by parity/error correction while on DVD-R, only about 3/4 of the bits are protected. This means higher chance of unrecoverable read errors with DVD-R compared to DVD+R.

I have an old batch of DVD+R with media ID "SONY/D21" that seem to be of high quality, but I didn't mention it above because they are no longer being manufactured. But if you have some older SONY brand DVD media from pre-2010, check the media ID. There are free programs online that one can use to check the media ID.
I completely agree.
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