Archives are much slower than backup

[Kempadasiah, Umesh]

Hi ALL,
     I have TSM server and client ver 5.1.5 
The archives are very much slower than the selctive or incremental backups. Both are 
backed up to tapes directly
Is there anything I can tune or modify at the server or client level to improve the 
speed of archives?
 
 
Thanks and regards
Umesh K