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Extracting spanned zip-file extremely slow

Discussion in 'Windows XP' started by Christer, 2005/05/02.

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  1. 2005/05/02
    Christer

    Christer Geek Member Staff Thread Starter

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    Hello all!

    A friend of mine told me that it took XP some 12 hours to extract a spanned set of 4 floppies. The set was created using WinZip 8 on a Win95 machine. There were a lot of small files (1kB-100kB). Anyone who knows about an incompatibility issue?

    Thanks for Your time,
    Christer
     
    Christer,
    #1
  2. 2005/05/02
    surferdude2

    surferdude2 Inactive

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    Hi Christer,

    The only thing I can think of is the way Win9x handled Long File Names versus how XP handles them. Granted, it would take an unusually heavy mix of similiarly named long file names being translated but then you said there were many small files, so perhaps it's possible.

    For a limited compatibility attempt, XP handles the translation the same as Win9x for the first four similarly named Long File Name files. However, after those four, XP uses the same first two characters but creates a hexidecimal number for the remainder of the characters.

    I can't guarantee that this is a factor with your friend's slow processing problem but nothing else comes to mind.
     
    surferdude2,
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  4. 2005/05/02
    Christer

    Christer Geek Member Staff Thread Starter

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    Hi 'dude!

    All the files have 8+3 character names and have been created by a DOS application. Data has been downloaded from a GNSS (GPS) logger and the application has created a number of files "attached" to the downloaded file.

    An example: 43IP2371.PSF was downloaded from the logger and during evaluation in the DOS application, another seven files with different extensions, *.DMS, *.ERR, *.IGC, *.INF, *.MRU, *.PFO, *.TSK, are created. Most of the files are only a few (1-3) kB but three of them are 20-200 kB.

    (The file name is an identification tag, the first three characters are year, month and day, the next four identify the logger and the last character is the sequence number of the flight, if more than a single flight has been made.)

    I believe that rules out the "long file name" issue.

    Thanks,
    Christer
     
    Christer,
    #3
  5. 2005/05/02
    Steve R Jones

    Steve R Jones SuperGeek Staff

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    Was the friend using the XP build in Extract ALL or does he have WinZip installed?

    Was he doing anything else with the pc at the same time of the extraction?

    Does the pc have more than 256megs of ram?

    Does he need to do this again or is this a curiosity question?
     
    Steve R Jones,
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  6. 2005/05/02
    Christer

    Christer Geek Member Staff Thread Starter

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    He doesn't have WinZip installed and as I understood him, he used the "extract all ".

    I don't think he did anything else, maybe receiving and sending e-mails.

    Yes, 512 MB.

    The transfer was from an old LapTop without a CD-burner to a DeskTop. The spanned zip-file contained at least five years worth of flight data. It was created in 2002 and has been extracted once before to the system, prior to a recent reinstallation. I don't remember if WinZip was installed on that previous occasion but it went flawlessly.

    To answer Your question, unless he doesn't mess up the data partition (created at the recent installation) it is a curiosity question.

    Christer
     
    Christer,
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