The HOTX driver tests the TPF DASD supports by creating a 'hot record' (default using #HOTREC) to blast channels and to test cache.
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The instances created by the HOTX driver stresses the DASD system by repeatedly finding and filing the "hot record." The first time it runs, it allocates a 4K frame on the system heap for the subsystem to store the information (8 bytes for each entry containing the flags (run, stat, stop, ebrout) of all ordinals (0x00-0x13) of all Istreams (up to 24).
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