dvadura@watdragon.waterloo.edu (Dennis Vadura) (12/02/89)
I have a sr97 Maple 4.2 tape and I want to copy it... (on DN3500 running 10.1) so I perform the following..., >/systest/ssr_util/cptape -r test -dev ct >calypso.root[39]% ls -l >total 31825 >-rwxr--r-- 1 root 10792960 Nov 2 15:25 maple42.sr10 >-rwxr--r-- 1 root 10831360 Nov 2 16:35 maple42.sr97 >-rwx------ 1 root 10831360 Dec 1 15:39 test and when I do the rbak I get the error... >calypso.root[40]% rbak -index -from test -all | more >Starting index: > > >** Tape i/o error -- DATA LOST. > > >** UID in block header does not match those read from earlier blocks. >correct uid = 4D41504C.45202020, uid read = 40C8C80D.80018A2C, block 11 >?(rbak) (next_block) Fatal error. similar errors occurr if I copy the file to tape using cptape, and then try the rbak from tape. Anybody have any ideas? What does the UID mismatch mean? I couldn't find it any of the manuals that I have. -thanks -dennis -- -------------------------------------------------------------------------------- Another rescue ruined by the total |Dennis UUCP,BITNET: dvadura@water lack of danger. |Vadura EDU,CDN,CSNET: dvadura@waterloo ================================================================================
davidb@braf.inmos.co.uk (David Boreham) (12/04/89)
This is apparently a bug in cptape. Mabe someone from HP/Apollo could fill in the details. we have this problem all the time getting tapes from Mentor, who copy Apollo RAI tapes for us. David Boreham, INMOS Limited | mail(uk): davidb@inmos.co.uk or ukc!inmos!davidb Bristol, England | (us): uunet!inmos.com!davidb +44 454 616616 ex 547 | Internet: davidb@inmos.com
lampi@pnet02.gryphon.com (Michael Lampi) (12/05/89)
> What does the UID mismatch mean? [text deleted]
Each block written by WBAK to a tape contains header information in addition
to the data being backed up. There is a UID created for the backup set which
is written in a section of this header info portion, which RBAK uses to verify
that the data it is reading is good, and not a part of something that it
doesn't know about.
Sounds like you may have skipped a block, missed an end-of-file marker, or the
original tape is bad.
Michael Lampi MDL Corporation 213/782-7888 fax 213/782-7927
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"My opinions are that of my corporation!"dvadura@watdragon.waterloo.edu (Dennis Vadura) (12/05/89)
In article <23078@gryphon.COM> lampi@pnet02.gryphon.com (Michael Lampi) writes: >> What does the UID mismatch mean? [text deleted] > >Sounds like you may have skipped a block, missed an end-of-file marker, or the >original tape is bad. Hmm, I've since successfully restored from the original tape its entire contents using rbak. Now I can probably create a new tape by using wbak but this seems a bit awkward. Why do I get an error when when I copy the tape image to a file and then try to perform an rbak from the tape image I have on disk. This is the fundamental problem that I do not understand. It was my understanding that when you use /systest/ssr_util/cptape, that what you get on disk is an *EXACT* image of the contents of the tape, if I then take that file and try an rbak from it from disk, or if I copy it to a new tape and then try the rbak from the tape it fails with the previously posted errors. -thanks -dennis -- -------------------------------------------------------------------------------- Another rescue ruined by the total |Dennis UUCP,BITNET: dvadura@water lack of danger. |Vadura EDU,CDN,CSNET: dvadura@waterloo ================================================================================