55 lines
2.3 KiB
Plaintext
55 lines
2.3 KiB
Plaintext
______________________________________________________________________
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STACKER NOTE Stac Electronics Technical Note
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Subject: Scheck and Stacker space reporting
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Tech011 - 2/20/92
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Page 1 OF 1
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_______________________________________________________________________
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Stacker's SCHECK utility offers information on the physical and logical
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Stacker drive regarding total, used, and remaining bytes; percentage of
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space used and free; compression ratio and projected bytes free. Below
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is a typical SCHECK report:
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SCHECK - 2.0, (c) Copyright 1990-92 Stac Electronics, Carlsbad, CA
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Volume in drive E is STACVOL_DSK
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No errors found
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Stacker Drive Statistics:
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Stacker Drive STACVOL File
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Drive E: E:\STACVOL.DSK
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---------------------- ----------------------
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Total Bytes: 4,096,000 2,054,656
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Bytes Used: 3,735,552 ( 91.2%) 1,846,272 ( 89.9%)
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Bytes Free: 360,448 ( 8.8%) 208,384 ( 10.1%)
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Stacker Drive Compression Ratio = 2.0:1
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Projected Bytes Free = 360,448
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What does it all mean?
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The left hand column displays logical data on the Stacker drive. This
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is how DOS and CHKDSK see the drive. The right hand column shows the
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usage of space (physical) inside the STACVOL file. This is the file
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that contains all of your compressed data. Its name and location are
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shown in the column title.
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Compression ratio:
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The Stacker drive compression ratio is the average compression ratio
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of the files in that specific STACKER drive. In the above example, the
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2.0:1 ratio tells us that the files in this Stacker drive are taking up
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half the space they would take up on non "Stacked" drive. The drive
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compression ratio does not display if the drive is empty.
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Projected bytes free:
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This number is Stacker's estimate of the available space left on the
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drive. If the drive is less than 12% full, or if the drive compression
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ratio is 2.0:1 or greater, this number will be the same as bytes free
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in the Stacker drive (left column). The projected bytes free on drives
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with usage over 12%, or compression ratios less than 2.0:1, will be a
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number slightly less than the bytes free in the STACVOL file multiplied
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by the overall compression ratio.
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