From: Digest To: "OS/2GenAu Digest" Date: Mon, 7 Mar 2005 00:01:08 EST-10EDT,10,-1,0,7200,3,-1,0,7200,3600 Subject: [os2genau_digest] No. 1068 Reply-To: X-List-Unsubscribe: www.os2site.com/list/ ************************************************** Sunday 06 March 2005 Number 1068 ************************************************** Subjects for today 1 Re: DVD writing : Mike O'Connor 2 Media usage - RSJ (was Re: DVD writing) : Mike O'Connor **= Email 1 ==========================** Date: Sun, 06 Mar 2005 03:01:29 +1000 From: Mike O'Connor Subject: Re: DVD writing Alan Duval wrote: > Mike O'Connor wrote: > >> Alan Duval wrote: >> >>> Have the problem sorted out. I'm using RSJ, and Kev said to attach >>> the DVD-R by RSJCd Writer and it can be formated by opening the >>> drive and right clicking on it to get the context message and >>> clicking on the erase command which formats the disk. I found that I >>> can write to a new DVD-R without formating it so it must be formated >>> already. Erased the data and was able to write to it again. Have not >>> tried copying CD's but don't expect any problems. >> >> Hi Alan, >> >> As any CD-R or DVD+-R are writeable, but not *re-writeable*, if you >> erase any data off them, all you are actually doing is removing the >> entries relating to them from the Table-Of-Contents and thus >> directory entries. When you then append more data to the CD-R/DVD+-R, >> the new data doesn't reuse the space previously used by the deleted >> data. Of course this wouldn't be obvious to anyone deleting a few >> relatively tiny files! >> >> For example, if you have a disk with a capacity of e.g. 4.7GB, with >> 3.5GB of data written to it, then delete 2GB of that data, you don't >> then have 3.2GB free, you still only have 1.2GB, as you can't >> physically overwrite on *write-once-only* media and exactly the same >> applies for RW media [until you re-format/blank RW media]! >> >> HTH > > Hi Mike, > > The 'Erase" command must have formated the DVD because I had copied a > whole drive to the disk initially then erased it and then copied > another drive of 3G. Disk is a little over half full. > I am using re-recordable DVD's Hi Alan, That final sentence makes all the difference! I was assuming that you actually meant *DVD-R*, not DVD-RW or DVD+RW, as you quoted that twice earlier! Also if you "erased" the RW media from the drive's context menu that *would* give you the entire capacity again. -- Regards, Mike Failed the exam for -------------------- MCSE - Minesweeper Consultant and Solitaire Expert -------------------- [ISP blocks *.exe, *.cmd, * dot com, *.bat, *.reg attachments] [Please use zipped versions of above] ---------------------------------------------------------------------------------- **= Email 2 ==========================** Date: Sun, 06 Mar 2005 04:50:00 +1000 From: Mike O'Connor Subject: Media usage - RSJ (was Re: DVD writing) Ed Durrant wrote: > Mike O'Connor wrote: > >> For example, if you have a disk with a capacity of e.g. 4.7GB, with >> 3.5GB of data written to it, then delete 2GB of that data, you don't >> then have 3.2GB free, you still only have 1.2GB, as you can't >> physically overwrite on *write-once-only* media and exactly the same >> applies for RW media [until you re-format/blank RW media]! >> >> HTH > > Hi Mike, I think your last point is incorrect - on a DVD-RW or CD-RW, > deleting a file DOES make that space available again for re-use. Just > think of the -RW devices like enormous floppy disks. > > Cheers/2 Hi Ed, Although I knew that there were facilities for partially/selectively reformatting DVD-RW [but not DVD+RW AFAIR] media with DVDDAO or one of the other *non-RSJ* applications, as Alan had specified that he was using RSJ, I was only referring to RSJ capabilities. Additional confirmation for Alan re: "blanking" From the RSJ 5.05 Manual : Information about the usage of DVD-RW and DVD+RW: Before using a rewritable DVD you have to format it. Please do this selecting "blank CD" in the context menu. This can take about half an hour. Test to prove that *RSJ* doesn't release file-space previously occupied by now-erased files! ------------------ start of test output ------------------- OS/2 Ctrl+Esc = Window List Type HELP = help [256RAM C:\DESKTOP]cdattach z: [256RAM C:\DESKTOP]chkdsk z: /v The current hard disk drive is: Z: The type of file system for the disk is CDWFS. The CDWFS file system program has been started. RSJ CD Writer File System Version 3.55 - (c) 1998 RSJ Software GmbH Germering 672,150 kilobytes total disk space 768 kilobytes are in 192 directories 139,550 kilobytes are in 2,272 user files 0 kilobytes are in extended attributes 0 kilobytes are reserved for system usage 502,386 kilobytes available for use CD-Writer specific information: 1 finalized sessions; open session: 2 4 tracks; reserved track: 4 => CD is formatted, writing enabled (CD is clean) Primary Volume Descriptor: Volume Set ID "" Publisher "" Preparer "" Application "" Copyright "" Abstract "" Bibliographic "" [256RAM C:\DESKTOP]dir z:\* The volume label in drive Z is UNKNOWN. The Volume Serial Number is 0000:0001. Directory of Z:\ 19/02/05 7:59 0 ---- . 19/02/05 7:59 0 ---- .. 18/01/04 11:40 0 ---- os2 3 file(s) 0 bytes used 514,443,264 bytes free [256RAM C:\DESKTOP]dir z:\os2\* /a:d The volume label in drive Z is UNKNOWN. The Volume Serial Number is 0000:0001. Directory of Z:\os2 19/02/05 8:03 0 ---- . 19/02/05 7:59 0 ---- .. 5/02/02 2:47 0 ---- APPS 5/02/02 3:07 0 ---- ARCHIVES 5/02/02 2:47 0 ---- BITMAP 5/02/02 2:47 0 ---- BOOK 5/02/02 2:47 0 ---- BOOT 18/01/04 11:40 0 ---- DLL 5/02/02 2:47 0 ---- DRIVERS 5/02/02 2:47 0 ---- ETC 5/02/02 2:47 0 ---- HELP 5/02/02 2:47 0 ---- INSTALL 5/02/02 3:02 0 ---- JAVAAPPS 5/02/02 2:47 0 ---- MDOS 5/02/02 3:02 0 ---- PDPSI 5/02/02 2:47 0 ---- POINTERS 5/02/02 3:02 0 ---- security 5/02/02 2:47 0 ---- SYSTEM 5/02/02 3:09 0 ---- Tivoli 19 file(s) 0 bytes used 514,443,264 bytes free [256RAM C:\DESKTOP]del z:\os2\dll\*.* Z:\OS2\DLL\*.*, Are you sure (Y/N)? y [256RAM C:\DESKTOP]cdattach z: -s [256RAM C:\DESKTOP]cdattach z: [256RAM C:\DESKTOP]chkdsk z: /v The current hard disk drive is: Z: The type of file system for the disk is CDWFS. The CDWFS file system program has been started. RSJ CD Writer File System Version 3.55 - (c) 1998 RSJ Software GmbH Germering 672,150 kilobytes total disk space 708 kilobytes are in 192 directories 109,672 kilobytes are in 1,958 user files 0 kilobytes are in extended attributes 0 kilobytes are reserved for system usage 486,728 kilobytes available for use CD-Writer specific information: 2 finalized sessions; open session: 3 6 tracks; reserved track: 6 => CD is formatted, writing enabled (CD is clean) Primary Volume Descriptor: Volume Set ID ""Enter-something-here:"" Publisher ""Personal - 26 SEP 2004"" Preparer ""Mike O'Connor"" Application ""RSJ Software CDWriter V3.55"" Copyright """" Abstract """" Bibliographic """" [256RAM C:\DESKTOP]dir z:\* /a:d The volume label in drive Z is UNKNOWN. The Volume Serial Number is 0000:0002. Directory of Z:\ 19/02/05 7:59 0 ---- . 19/02/05 7:59 0 ---- .. 18/01/04 11:40 0 ---- os2 3 file(s) 0 bytes used 498,409,472 bytes free [256RAM C:\DESKTOP]dir z:\os2\dll The volume label in drive Z is UNKNOWN. The Volume Serial Number is 0000:0002. Directory of Z:\os2\dll 19/02/05 8:03 0 ---- . 19/02/05 8:03 0 ---- .. 5/02/02 2:48 0 ---- IBMNULL 5/02/02 3:01 0 ---- PSCRIPT 5/02/02 2:48 0 ---- VGA 5 file(s) 0 bytes used 498,409,472 bytes free [256RAM C:\DESKTOP] -------------------- end of test output ----------------- Note: the contents of z:\os2\dll\*.* were erased from the *CD-RW*, this amounted to almost 30,000KB in 314 files, but instead of the available space increasing from: 502,386 kilobytes available for use to approx 532,xxx kilobytes it actually decreased to: 486,728 kilobytes available for use, as a further 16MB was used for the new TOC, as I closed that session! I had a quick search through the manual, but couldn't locate the area where it stated that re-writeable media wasn't suitable to use for running applications from as any modified files would be co-resident with all superseded previous editions of themselves, i.e. the disk would fill up reasonably rapidly if used for that purpose. -- Regards, Mike Failed the exam for -------------------- MCSE - Minesweeper Consultant and Solitaire Expert -------------------- [ISP blocks *.exe, *.cmd, * dot com, *.bat, *.reg attachments] [Please use zipped versions of above] ----------------------------------------------------------------------------------