For the discussions that follow, Z(x,y) is the function representing the height of the surface relative to the best fitting plane, cylinder, or sphere. Note that the “a” used in the following integral expressions implies that the integration is performed over the area of measurement and then normalized by the cross-sectional area “A” of the measurement.

Rms surface roughnesstable

I also read some stuff about enabling stuff in Group Policy, but the system is Windows 10 Home, so I'm not sure I even have access to that.

Surface roughnessRa chart

Now I'm starting to wonder that too. I mean this is a refurbished system, but newly refurbished as of 2 years ago. The drives actually have the word DVD+RW on them somewhere. So really, I have no clue how old these drives are, at least not at face value....The fact that the drives won't recognize the burnt DVD is weird though. I would think that at least if it was burnt on another computer, and then inserted into one of those drives, it should at least recognize it. Because the drives recognize other stuff (although I'm not sure what a program installation disc format is, because that's what I tested, and it did see that).

I have a similar issue and have tried just about every fix floating around on the web without any luck. I can burn CDs but no luck with DVDs at all. This is such a frustrating issue but whatever is causing it, I'm not holding my breath for a fix because honestly, how many people still burn DVDs in 2024?

The Sa and Sq parameters represent an overall measure of the texture comprising the surface. Sa and Sq are insensitive in differentiating peaks, valleys and the spacing of the various texture features. Thus Sa or Sq may be misleading in that many surfaces with grossly different spatial and height symmetry features (e.g., milled vs. honed) may have the same Sa or Sq, but function quite differently. The figure above demonstrates two very different surfaces with identical Sa and Sq values, indicating the insensitivity of the Sa and Sq parameters. Nonetheless, once a surface type has been established, the Sa and Sq parameters may be used to indicate significant deviations in the texture characteristics. Sq is typically used to specify optical surfaces and Sa is used for machined surfaces.

Rms surface roughnessformula

Luckily, I have an older system that I can use for the video I'm trying to burn, but I'd rather have my current one with the 2 dvd=rw drives...since it's way faster. Any help would be appreciated.

DVD+R, DVD+RW, DVD-R and DVD-RW are each different formats. "Early DVD+RW and DVD+R recorders could not write to DVD-R(W) discs and vice versa."

Rms surface roughnesschart

I've definitely tried step one, several times in fact, with no success. Haven't disabled any Antivirus software, so I'll try that (and I don't have an external DVD drive to try step 3, although I may end up getting one of those because they are super cheep these days). This morning I tried to put a DVD that I burnt yesterday on my older computer, and it did the same thing - spit out the disk and told me to insert a blank disk. Then I tried putting a program installation disk in the drive, and that WAS recoginzed....so it has to have something with the DVD-R. The DVD-R that was spit out WAS playable/burnable in my older system, that also runs Windows 10...so I'm narrowing the issue - the drive can read non-DVD-R disks, but can't read DVD-R disks. The DVD-R disks are good though, and the drive is good...so what could the issue be?

Anyways, the device manager recognizes both of these drives, and when I insert a disk to install a program or something it reads that disk, but when I try to burn a DVD it just keeps ejecting the blank disk. I was thinking maybe the drives are not enabled to burn in the BIOS, considering I had an SSD hard drive failure a last year, and had to get a new one, which was installed at Best Buy. I was wondering if maybe they didn't set the drives correctly, but I would think if that was the case then neither drive would work at all. Also, when editing the registry values that are found in the article I referenced, there are no "upper" or "lower" filters for me to delete in the first place. This is the first time I'm attempting to burn anything from these drives.

I have a refurbished computer that comes with two DVD+RW drives. I've been trying to transfer old family VHS movies to DVD's, and when trying to finally burn the files to DVD, neither of the drives recognize the blank disks I insert. They both just eject the disks and tell me to "Please insert a blank disk". I've scored the internet for clues as to what may be causing this. I've edited the registry keys that I'm told to edit, still no luck (by following the steps here:

Sa and Sq are the Average Roughness and Root Mean Square Roughness are evaluated over the complete 3D surface respectively. Mathematically, Sa and Sq are evaluated as follows:

Rms surface roughnesspdf

https://answers.microsoft.com/en-us/windows/forum/all/dvdcdrom-drive-wont-recognize-blank-cd-r-in-disk/ee32c56d-55e2-4d4f-a78d-b72748246ec2

In any case, after hours of trying different and unsuccessful fixes, this one worked for me in a bout 30 seconds... hope it does for you, but your mileage may vary...

The fact that you first state you have a DVD**+RW drive, but then want to write a DVD-**R makes me wonder if this is just a selling mistake, or if you are indeed using the wrong media for your drive.

I had the same problem, after years of using the same drive in the same computer to burn many, many disks. At some point, the drive seemingly lost both its recordable drive designation and the Recording tab in it's Properties window. I many suggestions to fix that, with no joy. Finally I came across an odd possibility in a reply to this post (https://www.technipages.com/enable-disable-cd-burning-windows) ... the person replying, who was also missing the "Recording" tab on the Properties for his optical drive, noticed that the "NoCDBurning" registry entry in HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer was showing as type REG_SZ - the original author of the post had recommended creating that entry as type DWORD ... when the reply guy changed his "NoCDBurning" entry to type DWORD his optical drive regained its recording status.