Shutting down the Job Scheduler in a shared-disk cluster is the same as shutting it down in a nonclustered Adaptive Server configuration.
From the Adaptive Server Sybase Central plug-in:
From any Adaptive Server instance, right-click the Scheduled Jobs folder (the Scheduled Jobs folder appears under each instance, and each instance can initiate all Job Scheduler commands from the plug-in).
Select Administer to open the Job Scheduler Administration dialog.
From the Task Configuration tab, select Stop.
From the command line, run:
use sybmgmtdb go sp_js_wakeup "stop_js", 1 go