Date: Thu, 22 Apr 1999 01:41:29 +0200 From: Palle Girgensohn <girgen@partitur.se> To: David Kelly <dkelly@mail.HiWAAY.net> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: seagate SCORPION taper? Was: python Message-ID: <371E6229.A660B766@partitur.se> References: <199904211817.NAA11540@mail.HiWAAY.net>
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Hi! As David Kelly proposes, I have mixed up the names of these machines. I am planning to get a Seagate *Scorpion* DDS-3, not a python. Sorry for confusion! But the Scorpions, they seem to be doing fine with FreeBSD? Glad to hear. I'm planning on returning a Hornet NS 20 (Travan5) since I can't get it to work properly... It can't mount the tapes on FreeBSD... Has anybody had any luck with such a machine? /Palle David Kelly wrote: > > Palle Girgensohn <girgen@partitur.se> writes: > > Seagate Python DDS-3. On FreeBSD 3.1 with 1542-CP? Is it OK. I read a > > message from a year ago that stated: > > > > > Just for your information! Don't use any combination of Seagate Python DAT > > > drives, Adaptec 2940 SCSI controller and FreeBSD or Linux! > > > > http://www.freebsd.org/cgi/getmsg.cgi?fetch=39897+0+/usr/local/www/db/text/1998/freebsd-scsi/19980222.freebsd-scsi > > I followed the above to Deja-news and didn't find much more than > discussion of audio over DAT and SGI's special firmware. > > I have an Archive/Conner/Seagate Python DDS-2 drive attached to an > Adaptec 2940 (an old one, not even Ultra, just Fast). Works fine. > > Also have a DDS-1 Python connected to a newer 2940. Also works fine > (only tried under 2.2.8 and older): > > ahc0 <Adaptec 2940A Ultra SCSI host adapter> rev 1 int a irq 11 on pci0:15:0 > ahc0: aic7860 Single Channel, SCSI Id=7, 3 SCBs > (ahc0:6:0): "ARCHIVE Python 25601-XXX 2.75" type 1 removable SCSI 2 > > Searched Seagates site and found: > http://www.seagate.com:80/support/tape/tapeinfo/w4m_diff.shtml which > says: > > The Python DAT drives are fully DDS, DDS-DC, DDS-2, SCSI 1, > and SCSI-2 compliant. > > Suggesting you either have a Python, or you have a DDS-3 drive, not > both. The Seagate DDS-3 drives are known as Scorpion. > > I have run about 200 tapes thru 4 Scorpion-24 DDS-3 drives attached > to (2) Asus SC875 controllers in (1) FreeBSD 3.0 (Feb 8 SNAP). > What problems I have had are not directly related to the tape drives. > Reading tape to HD, I see about 1MB/sec (uncompressed tape). Writing > 10k blocksize runs about 700k/sec, even when writting to all 4 > tape drives at once. (I do this a lot). > > Using tcopy to read from one drive, write to another pokes along > at 300k/sec. Since installing this system there have been numerous > changes to -CURRENT's scheduler but I am no longer in a position > to update the above system. > > Seagate DDS drives with hardware compression ship from the factory > with compression as the default setting. Suggest if you wish to > be compatible with anyone else's system that you turn off the > compression jumper. You can always enable compression with mt(1) > if you need it. If the other system has compression too then > compression will be compatible, but not everybody has hardware > compression. > > -- > David Kelly N4HHE, dkelly@hiwaay.net (hm) > ====================================================================== > The human mind ordinarily operates at only ten percent of its > capacity -- the rest is overhead for the operating system. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-scsi" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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