51 lines
2.3 KiB
Plaintext
51 lines
2.3 KiB
Plaintext
_______________________________________________________________________
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STACKER NOTE Stac Electronics Technical Note
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Subject: STACKER 2.0 device driver memory requirements.
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Tech024 - 2/20/92
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_______________________________________________________________________
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The STACKER device driver, STACKER.COM , requires a modest amount of
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resident conventional memory. The resident size of the Stacker device
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driver depends on the Stacker product being used, and on the way
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Stacker is configured. During the initialization phase, as it is
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loading and mounting the STACKER drives, it requires slightly more
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memory than when resident.
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Refer to the following tables to determine how much memory the Stacker
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device driver requires. These numbers should be used as guidelines.
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Once Stacker is installed, observe the STACKER.COM display as the
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system starts to see the exact amount of memory the driver is using.
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STACKER 2.0
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This table represents memory required for each Stacker product with a
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single Stacker drive using 8k clusters. It also shows the requirements
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on a system where Stacker is using EMS memory. When Stacker is
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configured to use available EMS memory, it will use 64k of EMS for its
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cache and buffers.
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Product With EMS Without EMS
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(Resident/(Initial)) (Resident/(Initial))
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2.0 Software 26K/(40K) 41K/(47K)
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AT/16, MC/16, XT/8 14K/(40K) 30K/(41K)
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Additional Stacker Drives:
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If using more than one Stacker drive, the device driver will consume
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slightly more memory to map each additional drive.
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Product With EMS Without EMS
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All 1.2K 3 K
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4K vs. 8K Clusters:
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A default cluster size of 8k offers better compression than 4k .
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However, the device memory required to achieve the better compression
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is slightly greater than the 4k option. With 4k clusters, the base
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driver size is reduced by the amount in the table below.
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Product With EMS Without EMS
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2.0 Software 4K 8K
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AT/16, MC/16, XT/8 4K
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__________________________________________________________________________
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1992 STAC ELECTRONICS
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