More on the same story .. Im getting there :) Seems that the bottleneck indeed was the gzip process .. I've changed my disklist/amanda.conf to no longer compress the images, and instead rely on the hardware compression in the LTO drive (trading tape space for speed ;) ), and the results are rather dramatic. A normal amanda session with compression takes between 10 and 15 hours, running whitout compression finished in 3.5 hours . I still noticed that the dumper process is the bottleneck, but dumper now gets a performance of about 3 - 4 Kbps (iso sometimes down to 250bps). Kind regards, -- Gerhard den Hollander Phone +31-10.280.1515 Technical Support Jason Geosystems BV Fax +31-10.280.1511 (When calling please note: we are in GMT+1) [EMAIL PROTECTED] POBox 1573 visit us at http://www.jasongeo.com 3000 BN Rotterdam JASON.......#1 in Reservoir Characterization The Netherlands This e-mail and any attachment is/are intended solely for the named addressee(s) and may contain information that is confidential and privileged. If you are not the intended recipient, we request that you do not disseminate, forward, distribute or copy this e-mail message. If you have received this e-mail message in error, please notify us immediately by telephone and destroy the original message.