Re: Rescueing a DLT tarball on a Mac

From: Thor Lancelot Simon (tls_at_panix.com)
Date: 11/07/05

  • Next message: Maury Markowitz: "Re: Rescueing a DLT tarball on a Mac" 
    Date: Mon, 7 Nov 2005 16:33:26 +0000 (UTC)

    In article <1131287639.814812.120460@f14g2000cwb.googlegroups.com>,
    Maury Markowitz <maury_markowitz@hotmail.com> wrote:
    >
    >Then I used dd to copy the file off the tape into my home dir. dd
    >happily did so, resulting in a suspiciously small 130k file. I am
    >curious about dd, exactly what does it do at a low level? Simply copy
    >bytes from dev1 to dev2? If so, how does it know when the file ends?

    The tape has end-of-file markers on it. It returns EOF to the reading
    process every time it reaches one of those.

    The 130k file you restored sounds like a table of contents from some
    backup system that writes multiple backup files to one tape (in this
    case, possibly just one, but with the table of contents in front). Have
    you tried running "file" on it? (that is, on the file you restored from
    tape with dd)? 

    -- 
 Thor Lancelot Simon	                                      tls@rek.tjls.com
"The inconsistency is startling, though admittedly, if consistency is to be
 abandoned or transcended, there is no problem."		- Noam Chomsky
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