Guidelines for improving I/O performance
• Spreading data across disks to avoid I/O contention.
• Isolating server-wide I/O from database I/O.
• Separating data storage and log storage for frequently updated databases.
• Keeping random disk I/O away from sequential disk I/O.
• Mirroring devices on separate physical disks.
• Partitioning tables to match the number of physical devices in a segment.Check the Sybase Wiki @ sybasewiki.com