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Full Discussion: HP-UX 10.20 fbackup? restore help/guidance needed
Operating Systems HP-UX HP-UX 10.20 fbackup? restore help/guidance needed Post 302223804 by Perderabo on Monday 11th of August 2008 12:20:19 PM
Old 08-11-2008
I have not used fbackup or frecover this century, but what I recall is...

fbackup uses its own format. tar cannot read it. fbackup uses the entire tape. The first item written on a new tape is a very short file called the volume header. This gets updated each tape you reuse the tape with fbackup and so fbackup knows how many times it has written to the tape. If you can't find the header, the tape must be bad or something. 0m is the right device and fbackup always rewinds the tape explicitly before writing. frecover will do an explicit rewind as well. An fbackup tape looks like many files to other programs.. it is not a single file the way a tar archive is. frecover is very fast with DDS tapes.. it somehow uses "group marks" (or something like that) to fast forward to the right data.
 

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LEARN ABOUT OPENSOLARIS

tcopy

tcopy(1)							   User Commands							  tcopy(1)

NAME

       tcopy - copy a magnetic tape

SYNOPSIS

       tcopy source [destination]

DESCRIPTION

       The  tcopy  utility copies the magnetic tape mounted on the tape drive specified by the source argument. The only assumption made about the
       contents of a tape is that there are two tape marks at the end.

       When only a source drive is specified, tcopy scans the tape, and displays information about the sizes of records and tape files. If a  des-
       tination  is  specified,  tcopy makes a copies the source tape onto the destination tape, with blocking preserved. As it copies, tcopy pro-
       duces the same output as it does when only scanning a tape.

       The tcopy utility requires the use of Berkeley-compatible device names. For example,

	 example% tcopy /dev/rmt/1b /dev/rmt/2b

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mt(1), ioctl(2), attributes(5)

NOTES

       tcopy will only run on systems supporting an associated set of  ioctl(2) requests.

SunOS 5.11							    10 Mar 2000 							  tcopy(1)
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