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