On Tuesday 13 August 2002 08:20, Kevin Passey wrote: >Hi again, > >Christoph was correct - I dug the manual out and the drive is > installed by default with hardware compression on. > >You have to set the first dip switch to off - I'm tapetype - ing > as I type. > >I will post the results here - if anyone is interested. > >Kevin > >-----Original Message----- From: Christoph Scheeder [mailto:[EMAIL PROTECTED]] >Sent: 13 August 2002 10:33 >To: Kevin Passey >Cc: Amanda (E-mail) >Subject: Re: tapetype for dell powervault 100T DDS4 drive - using > 150m Fuji ta pe > > >Hi, >your assumptions below are correct, >but the size of your tapetype is a little of of what it should > be... a DDS-4 drive with 150m tapes is supposed to hold about > 20GB of data. the values tapetype reports makes me beleave your > tapedrive is using hardware-compression. >This is bad/a no-no for tapetype. >Tapetype writes random data to the tape to mesure the raw > capacity. if you try to compress that data, it will become > bigger, and tapetype will hit eot much earlier then without > compression. By the way, amanda likes to have control over > compression, so it's a good idea to switch hardwarecompression > completly of for drives used by amanda. >Christoph > >Kevin Passey wrote: >> Hi, >> >> I have just run tapetype for the above drive - it looks like >> this. >> >> ./tapetype -f /dev/nst0 >> wrote 530067 32kb blocks in 1621 files in 7441 seconds (short >> write) wrote 530076 32kb blocks in 3252 files in 7408 seconds >> (short write) >> >> define tapetype unknown-tapetype { >> comment "just produced by tapetype program" >> length 16564 mbytes >> filemark 0 kbytes >> speed 2284 kps >> } >> >> I have used a 150m DG4-150 Fujifilm 4mm tape. >> >> I presume I just include this code in the amanda.conf file. >> >> One question I need help on - does it matter that the tapetype >> is un-known > >- > >> or can I just include it like this:- >> >> define tapetype PV100T-DDS4 { >> comment "PowerVault 100T DDS4" >> length 16564 mbytes >> filemark 0 kbytes >> speed 2284 kps >> } >> >> Thanks in advance >> >> Kevin Passey
I'd wondered about that myself as I would have expected maybe 19.xx gigs if it was off, but only 12 or 13 if it was on. -- Cheers, Gene AMD K6-III@500mhz 320M Athlon1600XP@1400mhz 512M 99.11% setiathome rank, not too shabby for a WV hillbilly
