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Number : 592 Date : 2001-08-15 Author : Dan Anderson Subject : Re: spanning CDs Size(KB) : 3
Hi Tom, I'll copy our comments to the xxcopy group because it is an important item that one of the current limitations with xxcopy is that it does not by itself allow for effective backup of Win95-98 etc operating systems and applications to CDRs (nor CDRWs). In fact, on a stand-alone basis it is recommended that a switch be used to turn off the LFN/SFN data retention when xxcopying to CDRs so that the process does not take an inordinately long time for no effective result. If you scan prior correspondence in this group for the subject of backup to CDRs you'll see discussion of the supplementary role of DOSLFNBK. The problem is not the long file names themselves but retaining the one-to-one correspondence with the short file names that are still an essential element within the operating system. Kan has a tech note that specifically addresses the issue of LFNs and SFNs and, as he mentioned, is anticipating future enhancements for xxcopy. Regards, ...Dan ========================= ----- Original Message ----- From: Tom To: Sent: Tuesday, August 14, 2001 11:43 AM Subject: Re: [xxcopy] spanning CDs Hi Dan Not sure I understand. I thought that XXCOPY took care of all the LFN issues. My plan of action was to backup everything to CD-RWs using XXCOPY. Then if disaster struck, I would use my Win98 boot disk which has CD support on it to restore my system and files. I beleive this type of boot is into a 32 bit environment but maybe thats where I was wrong. I'd sure like to hear your thoughts on this. Tom -----Original Message----- From: Dan Anderson To: xxcopy@yahoogroups.com Date: Monday, August 13, 2001 2:05 PM Subject: Re: [xxcopy] spanning CDs Tom, the one supplement to Kan's comments, pending further developments, is that you may want to check out of the use of DOSFLNBK, in addition to using xxcopy, to resolve the issue of the SFNs (short file names) which is a critical element if you are backing up items such as operation systems of applications onto CDRs. Reference: http://www8.pair.com/dmurdoch/programs/doslfnbk.htm ...Dan =========================== ----- Original Message ----- From: Kan Yabumoto To: Sent: Monday, August 13, 2001 10:51 AM Subject: Re: [xxcopy] spanning CDs > > Tom, > > Use the /SP (for spanning) switch which is a rudimentary way > to allow a continuation of XXCOPY job by inserting a user-prompt > whenever the destination volume becomes full. > > Since the current implementation of the /SP switch is a > "quick-and-dirty" (relatively unsophisticated) one, it > does not let you perform a "incremental backup". It assumes > that the new blank disc (or floppy) you insert has been > formatted (and will always wipe out the contents if there > is any files present). > > In the future, we will eventually add more intelligence to > this switch (with the help of a catalog file which will > store LFN/SFN reference table for a full restore capability). > > Since the raw file system on DirectCD or other CD based > file system stores an incompatible SFN, XXCOPY (nor other > file copy tools) cannot save the SFNs as they appear in > the source directory without the help of some lookup table. > (This will also change once we have a robust /SP with > the catalog file in the future). > > Nevertheless, XXCOPY's /SP switch is the one to use. > > Kan Yabumoto > =========================================================== > > At 2001-08-13 11:44, you wrote: > >Can anyone tell me if XXCOPY can span rewritable CDs? > >I have an HP 8220e external USB unit. > >Thanks. > >Tom > > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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