I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
Thanks david
At Thu, 15 Apr 2010 09:58:40 +1000 CentOS mailing list centos@centos.org wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
Were you burning it to a *DVD*-R? It is NOT a CD image. You need two things:
1) A DVD burner (as opposed to a CD burner). 2) A DVD-R (as opposed to a CD-R).
Make sure you have the proper hardware and blank media.
Also: did you download the md5sum file? Use that to do a check of the md5sum to make sure your ISO file is not broken.
Thanks david _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 04/15/2010 10:58 AM, Robert Heller wrote:
At Thu, 15 Apr 2010 09:58:40 +1000 CentOS mailing listcentos@centos.org wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
Were you burning it to a *DVD*-R? It is NOT a CD image. You need two things:
- A DVD burner (as opposed to a CD burner).
- A DVD-R (as opposed to a CD-R).
Make sure you have the proper hardware and blank media.
Also: did you download the md5sum file? Use that to do a check of the md5sum to make sure your ISO file is not broken.
Thanks david _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
I used a dvd-rw and a dvd-rw-dl on a dvd-rw-dl burner. md5sum is correct.
Thanks david
On 15/04/10 09:58, david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
I've had graphical apps give me coasters on occasion. From the command line you can try:
growisofs -dvd-compat -Z /dev/dvd=CentOS-5.4-x86_64-bin-DVD.iso
(yes the syntax is a bit silly)
Kal
On 04/15/2010 11:10 AM, Kahlil Hodgson wrote:
On 15/04/10 09:58, david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
I've had graphical apps give me coasters on occasion. From the command line you can try:
growisofs -dvd-compat -Z /dev/dvd=CentOS-5.4-x86_64-bin-DVD.iso
(yes the syntax is a bit silly)
Kal
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
I tried your command but this error came up
[david@reddwarf ~]$ growisofs -dvd-compat -Z /dev/dvd=rpm/CentOS-5.4-x86_64-bin-DVD.iso :-( /dev/dvd: media is not recognized as recordable DVD: 0
I used a dvd-rw and a dvd-rw-dl with the same results.
Thanks david
david walcroft wrote:
On 04/15/2010 11:10 AM, Kahlil Hodgson wrote:
On 15/04/10 09:58, david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
I've had graphical apps give me coasters on occasion. From the command line you can try:
growisofs -dvd-compat -Z /dev/dvd=CentOS-5.4-x86_64-bin-DVD.iso
(yes the syntax is a bit silly)
Kal
I have found K3b to be excellent for burning CD and DVD from iso and making my own data disks.
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
I tried your command but this error came up
[david@reddwarf ~]$ growisofs -dvd-compat -Z /dev/dvd=rpm/CentOS-5.4-x86_64-bin-DVD.iso :-( /dev/dvd: media is not recognized as recordable DVD: 0
I used a dvd-rw and a dvd-rw-dl with the same results.
Thanks david _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 04/16/2010 01:02 PM, Rob Kampen wrote:
david walcroft wrote:
On 04/15/2010 11:10 AM, Kahlil Hodgson wrote:
On 15/04/10 09:58, david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
I've had graphical apps give me coasters on occasion. From the command line you can try:
growisofs -dvd-compat -Z /dev/dvd=CentOS-5.4-x86_64-bin-DVD.iso
(yes the syntax is a bit silly)
Kal
I have found K3b to be excellent for burning CD and DVD from iso and making my own data disks.
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
I tried your command but this error came up
[david@reddwarf ~]$ growisofs -dvd-compat -Z /dev/dvd=rpm/CentOS-5.4-x86_64-bin-DVD.iso :-( /dev/dvd: media is not recognized as recordable DVD: 0
I used a dvd-rw and a dvd-rw-dl with the same results.
Thanks david _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Yes it is good and I use all the time
david
On 04/16/2010 04:59 AM, david walcroft wrote: ...
I tried your command but this error came up
[david@reddwarf ~]$ growisofs -dvd-compat -Z /dev/dvd=rpm/CentOS-5.4-x86_64-bin-DVD.iso :-( /dev/dvd: media is not recognized as recordable DVD: 0
What does this command say?
dvd+rw-mediainfo /dev/dvd
Mogens
On 04/16/2010 03:58 PM, Mogens Kjaer wrote:
On 04/16/2010 04:59 AM, david walcroft wrote: ...
I tried your command but this error came up
[david@reddwarf ~]$ growisofs -dvd-compat -Z /dev/dvd=rpm/CentOS-5.4-x86_64-bin-DVD.iso :-( /dev/dvd: media is not recognized as recordable DVD: 0
What does this command say?
dvd+rw-mediainfo /dev/dvd
Mogens
[david@reddwarf ~]$ dvd+rw-mediainfo /dev/dvd /dev/dvd: unable to open: No such file or directory
Thanks david
On 04/16/2010 06:17 PM, david walcroft informed us:
On 04/16/2010 03:58 PM, Mogens Kjaer wrote:
On 04/16/2010 04:59 AM, david walcroft wrote: ...
I tried your command but this error came up
[david@reddwarf ~]$ growisofs -dvd-compat -Z /dev/dvd=rpm/CentOS-5.4-x86_64-bin-DVD.iso :-( /dev/dvd: media is not recognized as recordable DVD: 0
What does this command say?
dvd+rw-mediainfo /dev/dvd
Mogens
[david@reddwarf ~]$ dvd+rw-mediainfo /dev/dvd /dev/dvd: unable to open: No such file or directory
Thanks david
Sometimes devices can be elusive, especially if one is external. Try this to locate drives and symlinks:
[root@madeleine ~]# ls -l /dev | grep dvd lrwxrwxrwx 1 root root 4 Apr 16 21:17 dvd -> scd0 lrwxrwxrwx 1 root root 3 Apr 16 21:17 dvd-hda -> hda lrwxrwxrwx 1 root root 3 Apr 16 21:17 dvd-hdb -> hdb lrwxrwxrwx 1 root root 4 Apr 16 21:17 dvdrw -> scd0 lrwxrwxrwx 1 root root 3 Apr 16 21:17 dvdrw-hda -> hda lrwxrwxrwx 1 root root 3 Apr 16 21:17 dvdrw-hdb -> hdb lrwxrwxrwx 1 root root 4 Apr 16 21:17 dvdrw-sr0 -> scd0 lrwxrwxrwx 1 root root 4 Apr 16 21:17 dvd-sr0 -> scd0 lrwxrwxrwx 1 root root 4 Apr 16 21:17 dvdwriter -> scd0 lrwxrwxrwx 1 root root 3 Apr 16 21:17 dvdwriter-hda -> hda lrwxrwxrwx 1 root root 3 Apr 16 21:17 dvdwriter-hdb -> hdb lrwxrwxrwx 1 root root 4 Apr 16 21:17 dvdwriter-sr0 -> scd0
Also, the obvious but easily overlooked... Be sure to use "/dev/dvd", not "dev/dvd"
BTW, dvd+rw-mediainfo DOES work:
[rj@madeleine rj]$ dvd+rw-mediainfo /dev/dvd INQUIRY: [HP ][DVD Writer 1040r][MH21] GET [CURRENT] CONFIGURATION: Mounted Media: 13h, DVD-RW Restricted Overwrite Media ID: TDK601saku Current Write Speed: 4.0x1385=5540KB/s Write Speed #0: 4.0x1385=5540KB/s GET [CURRENT] PERFORMANCE: Write Performance: 4.0x1385=5540KB/s@[0 -> 936159] Speed Descriptor#0: 00/936159 R@7.7x1385=10704KB/s W@4.0x1385=5540KB/s READ DVD STRUCTURE[#10h]: Media Book Type: 00h, DVD-ROM book [revision 0] Legacy lead-out at: 2298496*2KB=4707319808 READ DVD STRUCTURE[#0h]: Media Book Type: 33h, DVD-RW book [revision 3] Last border-out at: 2045*2KB=4188160 READ DISC INFORMATION: Disc status: complete Number of Sessions: 1 State of Last Session: complete Number of Tracks: 1 READ FORMAT CAPACITIES: formatted: 936160*2048=1917255680 00h(800): 2297888*2048=4706074624 10h(10): 2297888*2048=4706074624 13h(10): 1361728*2048=2788818944 15h(10): 2297888*2048=4706074624 READ TRACK INFORMATION[#1]: Track State: complete incremental Track Start Address: 0*2KB Free Blocks: 0*2KB Fixed Packet Size: 16*2KB Track Size: 936160*2KB FABRICATED TOC: Track#1 : 14@0 Track#AA : 17@936160 Multi-session Info: #1@0 READ CAPACITY: 936160*2048=1917255680 [rj@madeleine rj]$
Good luck!
At Fri, 16 Apr 2010 12:59:08 +1000 CentOS mailing list centos@centos.org wrote:
On 04/15/2010 11:10 AM, Kahlil Hodgson wrote:
On 15/04/10 09:58, david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
I've had graphical apps give me coasters on occasion. From the command line you can try:
growisofs -dvd-compat -Z /dev/dvd=CentOS-5.4-x86_64-bin-DVD.iso
(yes the syntax is a bit silly)
Kal
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
I tried your command but this error came up
[david@reddwarf ~]$ growisofs -dvd-compat -Z /dev/dvd=rpm/CentOS-5.4-x86_64-bin-DVD.iso :-( /dev/dvd: media is not recognized as recordable DVD: 0
I used a dvd-rw and a dvd-rw-dl with the same results.
Use a DVD-R.
Make sure your DVD burner is in fact working. Its heads *might* need cleaning.
Thanks david _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 04/15/2010 11:10 AM, Kahlil Hodgson wrote:
On 15/04/10 09:58, david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
I've had graphical apps give me coasters on occasion. From the command line you can try:
growisofs -dvd-compat -Z /dev/dvd=CentOS-5.4-x86_64-bin-DVD.iso
(yes the syntax is a bit silly)
<snip> Syntax, silly? man growisofs <snip> There are several undocumented options commonly denoted with -use-the-force-luke prefix <snip>
mark
david walcroft wrote, On 04/15/2010 10:59 PM:
On 04/15/2010 11:10 AM, Kahlil Hodgson wrote:
On 15/04/10 09:58, david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
I've had graphical apps give me coasters on occasion. From the command line you can try:
growisofs -dvd-compat -Z /dev/dvd=CentOS-5.4-x86_64-bin-DVD.iso
[david@reddwarf ~]$ growisofs -dvd-compat -Z /dev/dvd=rpm/CentOS-5.4-x86_64-bin-DVD.iso :-( /dev/dvd: media is not recognized as recordable DVD: 0
I used a dvd-rw and a dvd-rw-dl with the same results.
Thanks david
I tend to use /dev/dvdwriter, it should not make a difference as they are all softlinks to /dev/YourDVDdevice, though I think I have seen some difference in behavior when used as /dev/dvd vs /dev/cdrom by gnome-mount.
As I don't think you have been clear on this point yet...is your *_MEDIA_* DVD+RW or DVD-RW, or one of the DVD+R or DVD-R variety?
The following links may be of some use for an attempt at "blanking" the disk before reuse. DVD+RW http://www.freebsd.org/doc/en/books/handbook/creating-dvds.html#AEN25355 DVD-RW http://www.freebsd.org/doc/en/books/handbook/creating-dvds.html#AEN25401 it looks like, from my quick read, DVD-RW may need an explicit blank before reuse
Of course the source of growisofs may be of use http://fy.chalmers.se/~appro/linux/DVD+RW/
On 04/17/2010 12:07 AM, Todd Denniston wrote:
david walcroft wrote, On 04/15/2010 10:59 PM:
On 04/15/2010 11:10 AM, Kahlil Hodgson wrote:
On 15/04/10 09:58, david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
I've had graphical apps give me coasters on occasion. From the command line you can try:
growisofs -dvd-compat -Z /dev/dvd=CentOS-5.4-x86_64-bin-DVD.iso
[david@reddwarf ~]$ growisofs -dvd-compat -Z /dev/dvd=rpm/CentOS-5.4-x86_64-bin-DVD.iso :-( /dev/dvd: media is not recognized as recordable DVD: 0
I used a dvd-rw and a dvd-rw-dl with the same results.
Thanks david
I tend to use /dev/dvdwriter, it should not make a difference as they are all softlinks to /dev/YourDVDdevice, though I think I have seen some difference in behavior when used as /dev/dvd vs /dev/cdrom by gnome-mount.
As I don't think you have been clear on this point yet...is your *_MEDIA_* DVD+RW or DVD-RW, or one of the DVD+R or DVD-R variety?
The following links may be of some use for an attempt at "blanking" the disk before reuse. DVD+RW http://www.freebsd.org/doc/en/books/handbook/creating-dvds.html#AEN25355 DVD-RW http://www.freebsd.org/doc/en/books/handbook/creating-dvds.html#AEN25401 it looks like, from my quick read, DVD-RW may need an explicit blank before reuse
Of course the source of growisofs may be of use http://fy.chalmers.se/~appro/linux/DVD+RW/
I use a mix of media. dvd-rw and dvd+r dl Is the 'bin' in CentOS-5.4-x86_64-bin-DVD.iso of any significance,as I haven't seen it before.
Thanks david
On Sat, 2010-04-17 at 09:25 +1000, david walcroft wrote:
I use a mix of media. dvd-rw and dvd+r dl Is the 'bin' in CentOS-5.4-x86_64-bin-DVD.iso of any significance,as I haven't seen it before.
--- Alrighty just for kicks put that centos dvd.iso on your desktop. Now right click on it and Click on "Write To Disk". If you have it in your menu it should plain out be like plug and play. So give that a whirl.
John
On 04/17/2010 02:14 PM, JohnS wrote:
On Sat, 2010-04-17 at 09:25 +1000, david walcroft wrote:
I use a mix of media. dvd-rw and dvd+r dl Is the 'bin' in CentOS-5.4-x86_64-bin-DVD.iso of any significance,as I haven't seen it before.
Alrighty just for kicks put that centos dvd.iso on your desktop. Now right click on it and Click on "Write To Disk". If you have it in your menu it should plain out be like plug and play. So give that a whirl.
John
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Yes that burnt an 'Image' but there is only 5 directories and 10 'Release Notes', there isn't a boot.iso. The burnt dvd does not boot on a system reboot.
Thanks david
On 18 April 2010 02:24, david walcroft dwalcroft@bigpond.com wrote:
The burnt dvd does not boot on a system reboot.
Why not just buy a CentOS CD or DVD from one of the companies listed here, http://www.centos.org/modules/tinycontent/index.php?id=24 ?
Ben
On 04/18/2010 09:57 PM, Benjamin Donnachie wrote:
On 18 April 2010 02:24, david walcroftdwalcroft@bigpond.com wrote:
The burnt dvd does not boot on a system reboot.
Why not just buy a CentOS CD or DVD from one of the companies listed here, http://www.centos.org/modules/tinycontent/index.php?id=24 ?
Ben _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Yes I went out and bought both i386 @ i86_64 bits on the net.
david
On Sun, 2010-04-18 at 11:24 +1000, david walcroft wrote:
On 04/17/2010 02:14 PM, JohnS wrote:
Alrighty just for kicks put that centos dvd.iso on your desktop. Now right click on it and Click on "Write To Disk". If you have it in your menu it should plain out be like plug and play. So give that a whirl.
John
Yes that burnt an 'Image' but there is only 5 directories and 10 'Release Notes', there isn't a boot.iso. The burnt dvd does not boot on a system reboot.
--- Well I cant explain that, I use it every day. It is the easiest way for me unless I need something custom done. You may have other problems since all the other methods failed also. By chance you do not have a Compaq do you? or HP?
John
On 04/18/2010 10:09 PM, JohnS wrote:
On Sun, 2010-04-18 at 11:24 +1000, david walcroft wrote:
On 04/17/2010 02:14 PM, JohnS wrote:
Alrighty just for kicks put that centos dvd.iso on your desktop. Now right click on it and Click on "Write To Disk". If you have it in your menu it should plain out be like plug and play. So give that a whirl.
John
Yes that burnt an 'Image' but there is only 5 directories and 10 'Release Notes', there isn't a boot.iso. The burnt dvd does not boot on a system reboot.
Well I cant explain that, I use it every day. It is the easiest way for me unless I need something custom done. You may have other problems since all the other methods failed also. By chance you do not have a Compaq do you? or HP?
John
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
No.
david
On Sun, 2010-04-18 at 11:24 +1000, david walcroft wrote:
On 04/17/2010 02:14 PM, JohnS wrote:
Yes that burnt an 'Image' but there is only 5 directories and 10 'Release Notes', there isn't a boot.iso. The burnt dvd does not boot on a system reboot.
--- OHH do you have your cd rom set to boot in the BIOS?
John
On 04/18/2010 10:11 PM, JohnS wrote:
On Sun, 2010-04-18 at 11:24 +1000, david walcroft wrote:
On 04/17/2010 02:14 PM, JohnS wrote:
Yes that burnt an 'Image' but there is only 5 directories and 10 'Release Notes', there isn't a boot.iso. The burnt dvd does not boot on a system reboot.
OHH do you have your cd rom set to boot in the BIOS?
John
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Yes.
david
david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
Thanks david
This is how I burn linux ISO's, rarely results in bad burn.
As root -
cdrecord -dev=/dev/scd0 -speed=8 -dao -pad -v whatever.iso
You might need to change /dev/scd0 depending upon your system, that works for me with a SATA burner.
If your iso is not sitting on a separate physical drive from / and /home, try not to use any apps while the burn is taking place.
Don't use a faster speed just because your burner supports it, I've found that the faster the burn the more likely some drives are to reject it as a boot disk even when the burn process doesn't report any errors, not sure why.
If all else fails and you have a second computer, you can burn the small boot.iso and mount the dvd image on the second computer and make it available over http. Then boot off of the boot.iso and do a network install. I frequently do it that way, as I don't see the point in wasting a DVD-R when the first thing I'm going to do after successful install is run yum update to replace a lot of the packages.
On 04/18/2010 01:03 PM, Michael A. Peters wrote:
david walcroft wrote:
I downloaded CentOS-5.4-x86_64-bin-DVD.iso but I haven't used Centos before and I've haven't used a -bin-DVD.iso before,every attempt so far to burn one has produced coasters,what do I do to get an image.
Thanks david
This is how I burn linux ISO's, rarely results in bad burn.
As root -
cdrecord -dev=/dev/scd0 -speed=8 -dao -pad -v whatever.iso
You might need to change /dev/scd0 depending upon your system, that works for me with a SATA burner.
If your iso is not sitting on a separate physical drive from / and /home, try not to use any apps while the burn is taking place.
Don't use a faster speed just because your burner supports it, I've found that the faster the burn the more likely some drives are to reject it as a boot disk even when the burn process doesn't report any errors, not sure why.
If all else fails and you have a second computer, you can burn the small boot.iso and mount the dvd image on the second computer and make it available over http. Then boot off of the boot.iso and do a network install. I frequently do it that way, as I don't see the point in wasting a DVD-R when the first thing I'm going to do after successful install is run yum update to replace a lot of the packages. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Thanks, I tried cdrecord changing /dev/scd0 to /dev/sr0 and it burnt the same as I have been getting previously,no boot.iso. So I have some 5 coasters that need blanking,what cdrecord command do I use to blank 'dvd+rw's.
Thanks david
david walcroft wrote, On 04/20/2010 02:59 AM:
Thanks, I tried cdrecord changing /dev/scd0 to /dev/sr0 and it burnt the same as I have been getting previously,no boot.iso. So I have some 5 coasters that need blanking,what cdrecord command do I use to blank 'dvd+rw's.
Thanks david
As stated earlier: The following links may be of some use for an attempt at "blanking" the disk before reuse. DVD+RW http://www.freebsd.org/doc/en/books/handbook/creating-dvds.html#AEN25355 Of course the source of growisofs may be of use http://fy.chalmers.se/~appro/linux/DVD+RW/
On 04/21/2010 04:37 AM, Todd Denniston wrote:
david walcroft wrote, On 04/20/2010 02:59 AM:
Thanks, I tried cdrecord changing /dev/scd0 to /dev/sr0 and it burnt the same as I have been getting previously,no boot.iso. So I have some 5 coasters that need blanking,what cdrecord command do I use to blank 'dvd+rw's.
Thanks david
As stated earlier: The following links may be of some use for an attempt at "blanking" the disk before reuse. DVD+RW http://www.freebsd.org/doc/en/books/handbook/creating-dvds.html#AEN25355 Of course the source of growisofs may be of use http://fy.chalmers.se/~appro/linux/DVD+RW/
Yes sorry I forgot that one.
Thanks david
Todd Denniston wrote:
The following links may be of some use for an attempt at "blanking" the disk before reuse. DVD+RW http://www.freebsd.org/doc/en/books/handbook/creating-dvds.html#AEN25355 Of course the source of growisofs may be of use http://fy.chalmers.se/~appro/linux/DVD+RW/
indeed, when I used CD-RW, I found they worked muhc better if you fully erased them before reuse. I decided they weren't worth the hassle, and due to how cheap CD-R (and now DVD-R) media is, I've never bothered with the -RW stuff since. for reuse, I am more inclined to use a USB flash memory.
I also had a lot of issues with CD-RW media not being as reliable to read as -R on a wide range of readers, I don't know if this applies to DVD-RW or not, but I've had enough issues with DVD_R media being hard to read on the slimline DVD drives many servers have that I don't want to push my luck.