On Wed, 1 May 2002, Elmar Kolkman wrote: > Hi, > > We are trying here to make backups of a Linux File Server on a DLT 8000 > tapedrive, but we can not get it to streaming mode. We tried everything we > could think of, but it only streams when running 'dd if=/dev/zero > of=/dev/st0 bs=64k'. It also streams with other block sizes, but as soon as > we replace /dev/zero by anything else, it will not stream. Strange thing is > that if we dd to disk and then to tape, it streams... But if we > dd /dev/urandom to disk and then to tape, it doesn't. It's really baffling. > Since I see a lot of you are running Amanda with DLT drives, does someone > have any idea how to get the drive streaming with real data ?
Have you tried looking at some of the module parameters for st? Try adding something like this to /etc/modules.conf (or pass on command line when loading module): options st buffer_kbs=128 write_threshold_kbs=126 max_buffers=32 max_sg_segs=16 See the st docs for info on what all that does and tune to taste. Later, Bill Carlson -- Systems Programmer [EMAIL PROTECTED] | Anything is possible, Virtual Hospital http://www.vh.org/ | given time and money. University of Iowa Hospitals and Clinics | Opinions are mine, not my employer's. |
