Users must create future backups using 36 or fewer TO clauses in a BACKUP command, a limit that will be enforced in future versions of Sybase IQ.
Keep backup commands small. Do not to go to extremes with the number of devices, as this will cause I/O and hardware contention with more devices. As a practical guideline, use roughly 1 device per core on the machine to saturate CPU usage. Use up to 2 devices per core on faster systems.