Re: [expert] /home/%user backup in multisession CD
I haven't used the multisession option myself (under linux), I've done it in the past under windows but it's not very efficient. Everytime you open and close a cdr it takes actually quite a bit of room on the disc http://www.roxio.com/en/support/cdr/multisession.html This is a windows burning tool that gives a little explaination of what multisession does. As I said, I don't use it, but I have seen the option under 'gcombust' so I believe that just checking the box would do the trick. http://www.abo.fi/~jmunsin/gcombust/FAQ.shtml This is another little faq that could help you troubleshoot if you have problems - but I wouldn't modify anything until you've actually tried to burn a disc and found it didn't work. There are quite a few gui clients already packaged for mandrake, most of them have 'buttons' that cover the options you're looking for. Mike On Sat, 19 Oct 2002, Gonzalo Avaria uttered these words of wisdom: Hi all, i want to make one little question. Here it is... :) - I would like to make backups or my user folder on the home, that is, i want to make a multisession CD that i could go creating folders with the contents of my /home/gonzalo like every month or week. How can i do that?. I have a ASUS 8x4x32 IDE-CD R/RW. Well if you need mor info i will send it to you. thanks for your time PS: I'm using MDK 9.0 = Gonzalo Avaria Alumno de Licenciatura en Fisica Facultad de Cs. Fisicas y Matematicas Universidad de Concepcion CHILE _ Do You Yahoo!? Información de Estados Unidos y América Latina, en Yahoo! Noticias. Visítanos en http://noticias.espanol.yahoo.com -- Michael Holt Banning, CA(o_ [EMAIL PROTECTED](o_ (o_ //\ www.holt-tech.net(/)_ (/)_ V_/_www.mandrake.com Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
Re: [expert] /home/%user backup in multisession CD
On Sat, Oct 19, 2002 at 09:19 -0700, Michael Holt wrote: I haven't used the multisession option myself (under linux), I've done it in the past under windows but it's not very efficient. Everytime you open and close a cdr it takes actually quite a bit of room on the disc http://www.roxio.com/en/support/cdr/multisession.html This is a windows burning tool that gives a little explaination of what multisession does. As I said, I don't use it, but I have seen the option under 'gcombust' so I believe that just checking the box would do the trick. http://www.abo.fi/~jmunsin/gcombust/FAQ.shtml This is another little faq that could help you troubleshoot if you have problems - but I wouldn't modify anything until you've actually tried to burn a disc and found it didn't work. There are quite a few gui clients already packaged for mandrake, most of them have 'buttons' that cover the options you're looking for. And if you want to do it in a text terminal: Task: Save /home/gonzalo on a multi-session CD-R Pre-Task: Determine which device is your CDRW: Open a text console (xterm) and su to root. Type: cdrecord --scanbus The output shows your device in the format 0,0,0. You only need the second and third number. # cd /home/gonzalo 1. Make an image of the data: # mkisofs -R -L -T -o foo.raw /home/gonzalo where 'foo.raw' is a given name whatever suits you, the date of the backup like 10192002.raw as example. 2. Burn this image as first track on a new CD-R: # cdrecord -multi -v speed=2 dev=0,0 ./foo.raw where 'dev=0,0' is the device you determined earlier. And you can of course change the speed! 3. Determine Start and End of the track: # cdrecord -msinfo dev=0,0 which puts out 2 numbers like this: start,end 4. Make an image for the next track: # mkisofs -R -L -T -C start,end -M 4,0 -o foo.raw /home/gonzalo where you need to put in the 'sart,end' numbers you determined in step 2. And you may change the name 'foo.raw' into something sensible. 5. Burn next track: # cdrecord -multi -v speed=2 dev=4,0 ./foo.raw After that you can go on by repeating steps 3 to 5 Thats what I'm doing all the time (if I'm not too lazy) wobo -- If you don't understand or are scared by any of the above ask your parents or an adult to help you. Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
Re: [expert] /home/%user backup in multisession CD
On Sat, 2002-10-19 at 11:07, Gonzalo Avaria wrote: Hi all, i want to make one little question. Here it is... :) - I would like to make backups or my user folder on the home, that is, i want to make a multisession CD that i could go creating folders with the contents of my /home/gonzalo like every month or week. How can i do that?. I have a ASUS 8x4x32 IDE-CD R/RW. Well if you need mor info i will send it to you. thanks for your time PS: I'm using MDK 9.0 A simpler *backup* (not archiving) solution is do is cycle CDRWs. On a four-week cycle, you use four CDRWs, one for each week. I record the date in the Volume label of the CDRW. When you get to week five you re-use the first week CDRW and start another cycle. This is repeated every week there after. So 4 - 1 (burn this one) 3 - 4 (move this one) 2 - 3 (move this one) 1 - 2 (move this one) I don't label my CDRWs so I can simply by moving them from one numbered cases to another. You can semi-automate this procedure with a script - still have to insert a CDRW thou. The result is you have four weeks of backups (or more if you like) and only have to burn one CDRW a week. No need to worry about multisessions at all. Gabriel signature.asc Description: This is a digitally signed message part
Re: [expert] /home/%user backup in multisession CD
I've also found that cd/rw's can be a risk - they do on a occasion, corrupt information. I have proof of that sitting on my desk. The problem is that you don't know ahead of time when that's going to happen, so I would make sure to use a more proven back up media on regular occasions (maybe tape) if you have something you really don't want to lose. mike On 19 Oct 2002, Gabriel Phoenix uttered these words of wisdom: A simpler *backup* (not archiving) solution is do is cycle CDRWs. On a four-week cycle, you use four CDRWs, one for each week. I record the date in the Volume label of the CDRW. When you get to week five you re-use the first week CDRW and start another cycle. This is repeated every week there after. So 4 - 1 (burn this one) 3 - 4 (move this one) 2 - 3 (move this one) 1 - 2 (move this one) I don't label my CDRWs so I can simply by moving them from one numbered cases to another. You can semi-automate this procedure with a script - still have to insert a CDRW thou. The result is you have four weeks of backups (or more if you like) and only have to burn one CDRW a week. No need to worry about multisessions at all. Gabriel -- Michael Holt Banning, CA(o_ [EMAIL PROTECTED](o_ (o_ //\ www.holt-tech.net(/)_ (/)_ V_/_www.mandrake.com Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
Re: [expert] /home/%user backup in multisession CD
On Sat, 2002-10-19 at 15:06, Michael Holt wrote: I've also found that cd/rw's can be a risk - they do on a occasion, corrupt information. I have proof of that sitting on my desk. The problem is that you don't know ahead of time when that's going to happen, so I would make sure to use a more proven back up media on regular occasions (maybe tape) if you have something you really don't want to lose. mike Opps forgot the verifying stage - very important in backups - always verify - never assume. I make an image then verify that against the burn. This checks for when the toc gets written and the information is not there. I had burner where the lubrication on the guide failed and before it crapped out gave me dozens of CDRs with subtle errors (a file or two). That is when I learned to always verify. Found a program on Windoze which would do sophisticated checksums tests and I did them against my burns. Another program, 'CDR Diagnostics' does low level checks. Yes, it can retrieve information from a CDR that normally cannot be read. Have not come across anything like that for *nix. As for durability, I am still surprised at the cheapo CDRW I have been using for over two (three?) years now and still working. I use better quality CDRW for my /home directory thou. As for method depends on the level of redundancy you want and how paranoid you are, no? This method is simple and works for me. I keep my /home under 800 Megs so I can simply burn a copy. This allows me to retrieve a given file by reading it off the backup CD. Something not that easy to do with tape. Not to mention it eliminates the additional expense of using tape. Now of course this is impractical once you get past a few CDs. Nor does it work for backing up the contents of a 20 Gig drive. As for archiving? I make two copies, both verified, just in case. Gabriel signature.asc Description: This is a digitally signed message part
