yrinauda Posted October 20, 2010 Report Share Posted October 20, 2010 Hi everyone! i have mz-rh910 for a few years,and now i can just play it,because when i'm recording md or editing it,after that the "system file is writing" and it stays that way.the player works and tries to save changes,but nothing happens.any help would be great! Quote Link to comment Share on other sites More sharing options...
sfbp Posted October 21, 2010 Report Share Posted October 21, 2010 I currently **still** have the same problem. I actually thought I'd fixed it by adjusting the laser, but it seems that nothing is simple in this regard. Can you confirm that this ONLY APPLIES TO 1GB (HiMD) disks? So many people are having this problem I actually wonder if it might be common to all units. However I have an identical replacement unit that works perfectly, with no adjustment. Stay tuned, perhaps we may get some more input. I've adusted the topic title accordingly Welcome to the forums! Stephen Quote Link to comment Share on other sites More sharing options...
yrinauda Posted October 23, 2010 Author Report Share Posted October 23, 2010 Thanks,Stephen! I Cannot confirm that is just for hi-md discs.i tried to record to formated 80min.md disc and i got the same problem. There's one thing i did't mentioned in my previous post - i went to the local repair service(not sony) and asked for help.they fixed it!they said that all they needed is just to clean the lense.but after a couple of weeks,i got the same problem,and when i returned to repair guys,they did't accept my md anymore,cause they're not sony and they had spend alot of time fixing my md ) Actualy i don't think it's the cleaning what helped.it couldn't get dusty in 2 weeks again.hmmm... Quote Link to comment Share on other sites More sharing options...
sfbp Posted October 23, 2010 Report Share Posted October 23, 2010 ty for those insights. So, it sounds as if there are TWO sets of parameters that get out of whack with the laser. I will tell you the sequence that I think happens, because the whole thing mystifies me too. And none of my adjustments (touch wood!) have caused me to lose the ability to write perfectly good 80m disks. So I should be thankful for that. A. the unit recognizes a completely blank disk (more on this below). B. recording begins. This may be different depending on whether one downloads or simply recordings through the input socket (analog or optical). C. recording finishes, now it is time to finish off the disk (I may not have these exactly right but the spirit is there) i. encryption ii. table of contents iii. master checksum of some kind computed by the firmware. You can see this, if you change ONE byte directly in the files that have the music in, even if you change it back, the music will be unreadable. Clever, but bad, design, Sony, and I suspect one of the reasons they appear to have abandoned the format. Phase C takes reading. It is the READING that messes up, for whatever reason. In many cases I can make a perfectly valid disk readable by other HiMD units, that my OWN RH910 can not read. It can always read disks successfully generated by the other units. So something is "a little bit off" and it sounds like it is the same something on all these 910's, which is very very odd. My other 910 works fine, so it's not a manufacturing/software thing where some date ran out. In addition there are some very nasty things (possibly only 2nd generation units and RH1, I am not sure) that it does when you delete files on the unit. Even a "format" does not do a real format. Hence a "blank" disk is not blank. Here's what happens (maybe you or others reading this have seen this) when you introduce that disk to Sonic Stage: 1. A dialog box comes up which you need to click on (more bad design) that says "Checking for rights to recover from deleted files" or something close to that. 2. The top right hand corner area, which tracks transfers, now lists rapidly all the files that it is going through, "transferring" them. In fact what it's doing is to synchronize the rights in such a way that items with limited transfer count get credited back to you when a disk is erased by some means other than SonicStage. 3. This process almost invariably pauses at "66%" suggesting to me that it now does something different. I'm not sure what, but only the last file that used to be on the disk is now shown in the display at top right. This final phase seems to take a random amount of time. The key point is that it is trying to read information off a supposedly formatted disk. When everything works, clearly that's exactly what it does. You can also notice the amount of free space is less than 961.9 MB when there are lots of files that just got deleted. It's not until this "rights recovery" step that the free space is the full amount of 961.9 A completely blank disk never fails in this way. I can nearly always make starting with a 1GB disk, a nice disk that can be played anywhere (except sometimes this unit). I haven't rigorously checked 80m disks, but that's because I have yet to see a single failure. I'm running out of completely blank disks, so sometimes I blank them out by formatting and reintroducing to Sonic Stage using another unit entirely. To make a disk in this funny state (track ID's saved for later recovery) requires that the information be written somewhere for later reading. When this problem was worst (generally it is much better after my tweaking) the unit would hang up even "formatting" or "erase all" on a disk, with the message you have seen ("system file writing"). For some reason it's the reading back of this "invisible" information which is the problem. I have no idea why. It's almost like the disk develops a fault that causes the firmware in this particular unit a big headache. Please feel free to elaborate on this or correct any of it. Maybe if enough people make observations of fact someone may see the whole picture and figure out what's going on. I thought I did, that it was the laser power, but it seems more fussy than a simple adjustment. The weird thing is it doesn't seem to happen on my other HiMD units. Stephen Quote Link to comment Share on other sites More sharing options...
sfbp Posted January 1, 2011 Report Share Posted January 1, 2011 IT'S FIXED. PM me for the solution, so we can try it out. Definitely a laser power adjustment problem. Happy New Year Stephen Quote Link to comment Share on other sites More sharing options...
rlanda Posted February 17, 2012 Report Share Posted February 17, 2012 Hi, I have the unit MZ-RH910 for some time now. Last time I used it was 1 1/2 years ago, everything was fine. This week I took it and tried to record something, but I have the TOC problem. I tried erased and format, but it's the same error, it keeps hanging on the "System File Writting". Please, tell me, how did you fix it? Thank you. Ricardo. Quote Link to comment Share on other sites More sharing options...
sfbp Posted February 17, 2012 Report Share Posted February 17, 2012 A lot depends on what type of disk you are having trouble with. There are 3 possibilities: a. 80m (or 74 or 60) disk formatted in "legacy" format b. 80m formatted in Hi-MD format c. 1GB disk (necessarily in HiMD format). So, first of all try all three and see which causes the problem. The bad news is - once a 1GB disk fails, you may never get it fixed by reformatting in this recorder. Even if working properly. I used a combination of self adjustment (automated), manual adjustment, and (finally) over ride to ignore the final step if it failed. For some reason these 2nd generation HiMD machines are particularly prone to this fault. Quote Link to comment Share on other sites More sharing options...
rlanda Posted February 18, 2012 Report Share Posted February 18, 2012 I forgot to tell you what type of disc. Well, at first I tried to format (and then erase tracks) a 1GB disc. Didn't work. But apparently the disc is intact, with all the songs in it. Today I tried with an old one, 80m. I used Sonicstage to transfer some files in LP2 format. Everything was smooth, and I was kinda happy. But then I disconnected the unit from the PC. And then I read "blanc disc". My MZ-RH91 erased all data. I tried once again the same operation and the same happened. So, do I need to get another unit to record? Thank you. Quote Link to comment Share on other sites More sharing options...
sfbp Posted February 18, 2012 Report Share Posted February 18, 2012 You've got the simplest fault of all - a completely busted overwrite head. Sorry. Someone will have to replace it (not me). Suggest you try Jim Hoggarth here on the board. Quote Link to comment Share on other sites More sharing options...
rlanda Posted February 19, 2012 Report Share Posted February 19, 2012 That's a relief. Thank you very much. Quote Link to comment Share on other sites More sharing options...
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