Hi, On Fri, 02 Jul 2021 21:22:00 +0200 "Thomas Schmitt" <scdbac...@gmx.net> wrote:
> Hi, > > i wrote: > > ... > You would need a filter program which takes care not to read > > more ... > than ~ 20 MB/s. > > Michael Lange wrote: > > I tried that, but as it seems without any effect on the drive's speed. > > Maybe my efforts were not sufficient :) > > Did you test it with a superfast input like /dev/zero ? > > time dd if=/dev/zero bs=1M count=1024 | your_filter >/dev/null > > Does it curb that stream and need the due time ? I did now, and it does (it took about 1 min. to read approx. 300 MB; without "pulling the brakes" it took about 1 sec.). Since I am no good with shell scripting I did not use dd though, but a simple Python function that I think does basically the same; the way I used to slow it down is quite primitive however (basically it just waits until 10 MB have been read and then sleeps for 2 sec.), which may be too simple to stop the drive from happily spinning on. > > > It looks like when reading a DVD-RW it takes about 1.2 seconds > > to read 10 MB of data; when I insert the Asus-CD, the drive spins > > audibly faster, but surprisingly takes about 3 seconds to read 10 MB. > > A rough estimation yields a linear density increase from CD to DVD by > a factor of 2.5 (= sqrt(4480MB/700MB)). Multiplied by 1.2 this yields > roughly 3, but does not explain the extra noise. > You would need to read larger parts of the media to get an estimation > of noise/speed ratio. I see, so CDs are generally slower than DVDs, and (no surprise) the DVD-RW is a bit slower here than a "real" (bought) DVD. > > > > > Does yours pull in the tray automatically after 200 seconds of > > > standing out ? > > > Yes, it actually does. > > At least it is not a random feature of individual drives. > > > > > I made a little poll here about this behavior, 1.5 years ago: > > > I remember that :) > > Actually I thought I had participated, but that appears to be a false > > memory. > > It's my memory which goes dim. I have you on the result list with > > Reporter Drive Since Media Pulls > ... > Michael Lange Plextor PX-810SA 2007 DVD no > Michael Lange TSSTcorp SH-224DB 2013 DVD no > ... > > I now added you with a 2021 ASUS DRW-24D5MT which pulls. > > > > > I wonder whether this is related to this obscure description > > > "E-Green technology auto-closes drive application when not in use, > > > saving over 50% power consumption for users" > > > I thought they just mean that it spins down after a few minutes, but > > who knows? > > The drives themselves have internal power management with timers for > partially shutting down the drive. The states are named "Active", > "Idle", and "Standby". The timer thresholds can be set by the computer. > Further the states can be ordered immediately by the computer. > > > > On the disc that came with the drive there is a "ASUS > > E-Green.exe", so maybe we would need to install this first to fully > > enjoy the Wonders of "E-Green"? :) > > https://www.techwalla.com/articles/what-is-the-asus-e-green-utility > could mean that the .exe agressively strives for "Standby" by setting > low timer thresholds. It seems also to be capable to count the time in > that state and to brag with its power savings. > > If my /dev/sr0 is annoyingly excited after Linux block i/o i run > > xorriso -outdev /dev/sr0 > > which ends by a drive calming START/STOP UNIT command. Nice! This work here, too. :-) > > ------------------------------------------------------------------ > > Another thing which makes me wonder about ASUS' description of the drive > is where they expect us to still find M-Disc DVD+R media. Last time i > looked i found only M-Disc BD-R (and some "currenlty unavailable" DVD > offers). Well, looks like this is not so hard. The first hit at ebay.de when searching for "m-disc dvd" shows an offer for 10 4.7 GB discs at 85.11 € + 7.31 € for shipping from Japan :-) They're Verbatim discs though, might be they break in the process :D There is also an offer from Australia, 5 discs for "~" 21.74 € + ~ 42.97 shipping (also Verbatim :) and a little bit further down the "killer" bargain: 10 Verbatims for ~ 46.11 € + free shipping! Buy now!! :-) Best regards Michael .-.. .. ...- . .-.. --- -. --. .- -. -.. .--. .-. --- ... .--. . .-. If some day we are defeated, well, war has its fortunes, good and bad. -- Commander Kor, "Errand of Mercy", stardate 3201.7
