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- STACKER NOTE Stac Electronics Technical Note
-
- Subject: STACKER 2.0 device driver memory requirements.
-
- Tech024 - 2/20/92
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- 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
-