-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Paul Bijnens said the following:
> Nicki Messerschmidt wrote: >> I have a very strange phenomenon. There is a server with an Seagate >> Scirroco 12/24Gb DDS3 drive attached. Onto this drive I can put >> data via 'dd if=/dev/zero of=/dev/nst0 bs=1024 count=100000' >> (100Mb) in about thirty seconds. This means a transfer rate of >> about 3.3Mb/s. But if I do an amflush of 6547621k it takes forever >> (about 12h). What is wrong? > That's not a good tape-performance test. A quick test, involving only > tape (and not simultaneous disk activity), is, with a scratch tape: > > amtapetype -c -f /dev/st0 > > With the -c option, it runs only a few minutes, and gives an > indication of the tapespeed (and tests if hardware compression is > enabled). I'll test that one... Thanks! > When simultaneous disk activity comes into play, have a look at the > scsi-termination. Depending on whether the tape or disk is the last > device in the chain, you may see problems only when that last device > is active, or just not active. The tape is an external scsi tape drive and the hard disk(s) are IDE (Raid) disks. So there should be no problem... > Also listen to the tape while flushing. Is it streaming or > constantly stopping/reversing/restarting (shoe-shining). There a problem since the tape drive is a "few" kilometers away from me... *g* Cheers and thanks Nicki - -- Linksystem Muenchen GmbH [EMAIL PROTECTED] Schloerstrasse 10 http://www.link-m.de 80634 Muenchen Tel. 089 / 890 518-0 We make the Net work. Fax 089 / 890 518-77 PGP Keys: https://www.link-m.de/pgp/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1-nr1 (Windows 2000) Comment: Get keys at: https://www.link-m.de/pgp iD8DBQFBrxB/6zWc+bXuIEMRAmbHAKCWbqq4p4Bad5Yzk8dYwVBZ8fKQJgCgjBy4 1u9uHhf5UHzaWmrIMIokVNQ= =NY2n -----END PGP SIGNATURE-----
