Increasing disk performance
You can use the following techniques to increase disk performance:
Refer to the following topic on measuring disk performance.
See Bypassing disk performance with the SKIP_DISK_WRITES touch file.
Check the fragmentation level of the data.
A highly fragmented disk limits throughput levels. Use a disk maintenance utility to defragment the disk.
Consider adding additional disks to the system to increase performance.
Multiple processes writing to the same disk/LUN create I/O contention, which can significantly slowing IO performance. Adding more disks/LUNs to reduce the I/O contention can significantly improve the overall system performance, especially if the workload is I/O intensive, such as the high number of concurrent backup streams with a relatively low deduplication ratio or a system with concurrent backup, restore, duplication or replication jobs running concurrently.
Determine if the data transfer involves a compressed disk.
Windows drive compression adds overhead to disk read or write operations, with adverse effects on NetBackup performance. Use Windows compression only if it is needed to avoid a disk full condition.
Consider converting to a system with a Redundant Array of Independent Disks (RAID).
Though more expensive, RAID devices offer greater throughput and (depending on the RAID level) improved reliability.
Determine what type of controller technology drives the disk.
A different system might yield better results.