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Full Discussion: validate tar file on tape
Top Forums Shell Programming and Scripting validate tar file on tape Post 302544388 by DGPickett on Wednesday 3rd of August 2011 03:15:24 PM
Old 08-03-2011
You gotta fill a lot of buffers in this life, eh?

Verify the whole thing if you have to move the tape. Get off of tape! I recommend a cheap PC with big, cheap drives on a back to back lan cable. Maybe even externalizing kits on cheap drives. Or Mozy -- off premises sooner!

If you could get a Hierarchial file system set up right, the stuff would just duplicate itself over the net to places far enough away, and the local copy could be deleted if not in use yet be available. I keep working on how to have a fluid pool of systems providing redundant storage using a mix of compressed and uncompressed mirror copies and autmoatic data migration based on backup spec (keep 3 copies 50 miles apart) and speed/size of storage device (low use data seeks slower, bigger (thus more chance of a use) devices). High use data gets replicated everywhere it is used. Every change after quiescence is a version, also saved. If a box went down, all files not adequately backed up are copied by machines with space from other machines. Take any machine any time. Just add machines or disks anywhere if space is low. Disk and net and even computers are cheap.
 

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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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