Forum Home
Press F1
Thread ID: 24154	2002-09-04 11:48:00	Rewrite again to CD-R works	E.ric (351)	Press F1

Post ID	Timestamp	Content	User
76436	2002-09-05 02:19:00	Peter H is right... Nero has a "start multi-session cd" option for writing... here you can set different options for writing your cd's... among these options, you are able to do what you have described... what it actually does is write the new text file to the folder you have created on the CD... a new TOC is then created which does not refer to the old text file which is physically still on the CD. So... you HAVE written to the cd-r more than once, but you haven't actually written over the information on the cd-r as you would do on a cd-rw. Hope this helps. Lo.	Lohsing (219)
76437	2002-09-05 04:18:00	There were apparent flaws in that lil experiment I did in the wee hours of the morning. Decided this after reading Billy, antmanz and Lohsing's post so I decided to do it again, but this time including values. Starting point: ------------------ DataLink 700MB CD-R (blank) 1st run: ---------- size of file on h/d = 15.052 MB stats of CD-R after writting file: used space: 15,423,488 bytes 14.7 MB free space: 0 bytes 0 bytes capacity: 15,423,488 bytes 14.7 MB 2nd run (same CD-R): --------------------------- using different file, size on h/d = 28.432 MB stats of CD-R after writting file: used space: 28,803,072 bytes 27.4 MB free space: 0 bytes 0 bytes capacity: 28,803,072 bytes 27.4 MB 3rd run (same CD-R): -------------------------- using different file, size on h/d = 642.6MB stats of CD-R after writting file: used space: 642,971,648 bytes 613 MB free space: 0 bytes 0 bytes capacity: 642,971,648 bytes 613 MB *note: nero now complain and asked if I wanted to finalise the CD-R. I clicked on no. nero then proceeded to write to the CD-R. 4th run (same CD-R): -------------------------- using different file, size on h/d = 1,091 bytes *note: would not write -> medium required for the compliation: CD-R/RW -> medium type in the recorder: [empty] 5th run (same CD-R): -------------------------- using different file, size on h/d = 1 kb *note: the same result as the 4th run. CONCLUSION: ------------------ It seems when the CD-R is being rewritten too it doesn't delete the previous file but rather the TOC doesn't point to it anymore. Even though the size reported now matches the new size of the file copied over the amount of used space is the [old size of the file + the new size of the file]: even though there is no direct evidence of this when viewing the stats. It will get to a stage when no more writting to the same CD-R is possible as suggested during my 4th and 5th run. But of course I'm merely repeating what had already been suggested by billy, antmanz and Lohsing. It is nice to prove to oneself though. Couple of good points came out of this though. 1: never do experiments in the lil wee hours of the morning. 2: I always assumed if the CD-R is written too, regardless of the free space left, it can not be written to again. Well anyway... that was fun, next!	helvista (1745)
76438	2002-09-05 12:49:00	Good to see the maths but.. Saved some files tonight had "Total size" of files came to 28.7 meg Added a few lines of text to a HTML saved it, now the file is 13 K in size saved to CDROM again, now 96 Meg "Total size" used on CDROM.	E.ric (351)
1 2