Hi! Am Mo, 2003-11-24 um 13.54 schrieb Gene Heskett: > On Monday 24 November 2003 03:46, Martin Oehler wrote:
[...] > Doing this to a tape also should tell you whether or not the drives > internal compression is in use, which for amanda, should be turned > off as that hides the true size of the tape from amanda. I need to work with hardware compression because I have 6 hours at night to execute my backup before people are starting to change files. With software compression, backup doesn't finish in time because the compression itself takes to long (I think an amanda mode that first moves the data completely to the backup server and then starting to compress, freeing the backed up boxes, would be a good solution. The "online compresssion" eats a lot of time). > Amanda > counts bytes sent to the drive after any gzip is applied, and if the > drives compressor is on, the data normally will grow slightly and > amanda may hit EOT thinking it still has 10-15% of the tape left. The Quantum drive hardware compression is completely manageable via the mt command. I'm now turning the compression off before starting the tape test and turn it back on for backup. When I'm finished with tuning the amtapetype test I want to use this inside my backup script, so each tape is tested before amflush starts (I'm using amanda with holding disks). > Humm, do I recall that name from a decade or so back when I was > running an amiga? Hehe, sorry, I still own an Amiga 500 but I wasn't very skilled a decade ago (at least not that skilled to become popular). Regards, Martin �hler
