A collection of tapetype definitions in use in the Amanda community. This list has not been sorted in any way so look at the whole thing before you decide what parameters who will use. Nobody provides any guarantees that any of these settings will work for you. They are provided for information purposes only. This list is also available from: http://www.snrc.uow.edu.au/public/amanda_tapetypes.txt Please send updates or new information to: chris@snrc.uow.edu.au ---- From: "Ron Barak" In my DAT drive (HP DAT in DEC StorageWorks enclosure), for 120m tapes (with compression), I use (and it's just the numbers that work for me, I have not made a scientific research to get the optimal values): define tapetype DAT { comment "DAT tape drives" length 8000 mbytes # these numbers are not accurate filemark 100 kbytes # but you get the idea speed 400 kbytes } ---- From: dietmar I have a HP1533 and a seagate drive (Archive Python SCSI message). I use for both drives: define tapetype DAT2 { comment "DAT tape drives" length 3000 mbytes filemark 250 kbytes speed 400 kbytes } This is a very conservative setting, but from some tape overflows i got the impression that 4GB is unformatted capacity and you get somewhere between 3GB and 3.4GB in real data. the python is used only for testing. I donīt know if it has more capacity then the HP. ---- From: "Chris Stacey" I have a seagate drive (Archive Python 4mm Helical Scan SCSI message). Based on the output from a series of ufsdumps I use: define tapetype DAT2 { comment "DAT tape drives" length 4000 mbytes filemark 63 kbytes speed 500 kbytes } ---- From: asa@poirot (Andre Saar) >I am trying to configure a Quantum DLT tapedrive for use with Amanda. >Does anybody have the correct define string to go in the amanda.conf file?? Don't know if it is correct, but it works fine: define tapetype DLT4-2 { comment "DLT4000 with Compaq III tapes" length 10000 mbytes filemark 8 kbytes speed 1250 kbytes } We are not using DLT hardware compression because amanda does compression itself. This dumps 18 machines with 115 filesystems on a DEC3000/300X every night (4 nights a week) with 4 to 13 GBytes (avg. 7.2 GBytes) of data depending on the dumplevel (tapecycle 16 tapes). ---- From: "Mariano Goluboff" I use a Quantum DLT tape drive on an SGI, and found that the following tapetype entry works very nicely. I use 10 GB tapes, and don't use the tape drive compression, since Amanda already does a lot of compression. define tapetype DLT { comment "DLT tape drives" length 10000 mbytes filemark 8 kbytes speed 2500 kbytes } ---- From: Ulla Fischer define tapetype DLT-4000 { comment "Quantum DLT-4000" length 20000 mbytes filemark 8 kbytes speed 1500 kbytes } ---- From: "Donald L. Nash" Here's what we use for DEC TZ87 CompacTape III drives: define tapetype DEC-TZ87 { comment "DEC TZ87 DLT CompacTape III" length 12000 mbytes filemark 8 kbytes speed 2500 kbytes } define tapetype DEC-TZ87-NC { comment "DEC TZ87 DLT CompacTape III, no hardware compression" length 10000 mbytes filemark 8 kbytes speed 1250 kbytes } The actual maximum capacity of a TZ87 with compression turned on is 20000 mbytes, but you can't be guaranteed of that compression factor, especially when you are sending already-compressed stuff to the tape. So we fudge and say the capacity is only 12000 mbytes. That's not a lot of gain over the uncompressed case, but every little bit counts. ---- From: "Scott R. Keszler" IBM RS/6000 model C10 with IBM branded 5GB 8mm (112m) tape drive. define tapetype EXB-8500 { comment "Exabyte EXB-8500 drive on decent machine" length 4200 mbytes filemark 48 kbytes speed 505 kbytes } IIRC, the EXB-8500 definition came included w/ the 2.3.0 example files. Although the definition is not new, the IBM 5GB tape drive is a data point for that definition. ---- From example/amanda.conf of amanda-2.3.4b3 distribution. define tapetype QIC-60 { comment "Archive Viper" length 60 mbytes filemark 100 kbytes # don't know a better value speed 100 kbytes # dito } define tapetype DEC-DLT2000 { comment "DEC Differential Digital Linear Tape 2000" length 15000 mbytes filemark 8 kbytes speed 1250 kbytes } # goluboff@butch.Colorado.EDU # in amanda-users (Thu Dec 26 01:55:38 MEZ 1996) define tapetype DLT { comment "DLT tape drives" length 20000 mbytes # 20 Gig tapes filemark 2000 kbytes # I don't know what this means speed 1.5 mbytes } define tapetype SURESTORE-1200E { comment "HP AutoLoader" length 3900 mbytes filemark 100 kbytes speed 500 kbytes } define tapetype EXB-8500 { comment "Exabyte EXB-8500 drive on decent machine" length 4200 mbytes filemark 48 kbytes speed 474 kbytes } define tapetype EXB-8200 { comment "Exabyte EXB-8200 drive on decent machine" length 2200 mbytes filemark 2130 kbytes speed 240 kbytes } define tapetype HP-DAT { comment "DAT tape drives" length 1900 mbytes # these numbers are not accurate filemark 100 kbytes # but you get the idea speed 500 kbytes } define tapetype DAT { comment "DAT tape drives" length 1000 mbytes # these numbers are not accurate filemark 100 kbytes # but you get the idea speed 100 kbytes } define tapetype MIMSY-MEGATAPE { comment "Megatape (Exabyte based) drive through Emulex on Vax 8600" length 2200 mbytes filemark 2130 kbytes speed 170 kbytes # limited by the Emulex bus interface, ugh } ---- From: Dan Lipofsky Information found on http://www.quantum.com Quantum DLT 2000xt Drive, hardware compression turned OFF filemark 8 kbytes # actually 0-8 KB; it fills out the last 8KB block speed 1250 kbytes # maximum: might be smaller (system dependent) length 15000 mbytes # Quantum DLT CompacTape IIIxt tapes length 10000 mbytes # Quantum DLT CompacTape III tapes Quantum DLT 2000xt Drive, hardware compression turned ON filemark 8 kbytes # actually 0-8 KB; it fills out the last 8KB block speed 2500 kbytes # maximum: might be smaller (system dependent) length 30000 mbytes # Quantum DLT CompacTape IIIxt tapes length 20000 mbytes # Quantum DLT CompacTape III tapes # these numbers are estimates based on a 2:1 compression ratio ---- From: "Michael R. Zika" For what it's worth, we use: define tapetype EXB-8500 { comment "Exabyte EXB-8500 drive" length 5000 mbytes filemark 48 kbytes speed 474 kbytes } For our Sun-packaged Exabyte-8500 tape drive. The filemark was taken from the Amanda examples for that drive -- caveat emptor. ---- From: "Ron Barak" define tapetype DAT { comment "DAT tape drives" length 8000 mbytes # these numbers are not accurate filemark 8 kbytes # but you get the idea speed 400 kbytes } ---- From: euler@lavielle.com (Lutz Euler) Unfortunately I can not provide any new information, but here is my configuration anyway: Amanda version: 2.3.0 tape drive: Transitional Technology TTY 8000 XL EXB 8500 compatibility mode tape length: 112 m tapetype info: the EXB 8500 entry as provided in the example/amanda.conf of Amanda 2.3.0. This works perfectly. If you have more accurate information so I can squeeze more out of the tape I would be interested to hear about it. ---- From: der Mouse Here is the tapetype we're using: # According to my tests, length=4474 mbyts and filemark=40 kbytes # (actually 39.4429- K). We're being a bit conservative here - I've # seen amanda overrun what it thought the tape size was by a few percent. # Besides, the Exabyte book _says_ filemarks really are 48K. # -Mouse, 1996-10-22 define tapetype EXB-8500 { comment "Exabyte EXB-8500 drive on decent machine" length 4200 mbytes filemark 48 kbytes speed 474 kbytes } ---- From: Ralf Fassel We use the following on a DAT streamer (Conner/Seagate) w/o hardware compression. The filemark value is a wild guess and has worked so far. tapetype DAT # what kind of tape it is (see tapetypes below) define tapetype DAT { comment "DAT tape drives." length 2000 mbytes # 90 m tape filemark 100 kbytes # don't know about this one. speed 400 kbytes # What the manual says. } We have only few filesystems to back up (<15), so the filemark is not that important for us. The speed is actually more like 390k/s, but that's close enough. ---- From: neil.long@materials.oxford.ac.uk (Neil J Long) Subject: Re: tapetype for HPC1533A The DIP switches do not have specific functions - think of it as an array and the permutation of the switches gives a specific behaviour. Extracted from INSTALLATION notes by Nigel Wade, University of Leicester for his codes to interrogate a C1533A on an SGI machine. For 90M DAT's I use define tapetype DAT2 { comment "DAT tape drives" length 1900000 kbytes # these numbers are not accurate filemark 100 kbytes # but you get the idea speed 500 kbytes } No compression should give 2G but I lie and that way amanda rarely attempts to write beyond the end of the tape! ---- From: Joe Connolly {OH} Here is what we use for our site. The tape is a Digital CompacTape III cartridge (also known as a TK85K). tapedev "/dev/nrst0" # or use the (no-rewind!) tape device directly tapetype DLT-2000 # what kind of tape it is (see tapetypes below) # tapetypes # # Define the type of tape you use here, and use it in "tapetype" above. # Some typical types of tapes are included here. The tapetype tells amanda # how many MB will fit on the tape, how big the filemarks are, and how # fast the tape device is. # define tapetype DLT-2000 { comment "Quantum DLT-2000" length 10000 mbytes filemark 8 kbytes speed 1500 kbytes } ---- From: Brian define tapetype EXB-TR3 { comment "Exabyte EXB-TR3 drive on decent machine" length 2200 mbytes filemark 48 kbytes speed 474 kbytes } ---- From: "Ancil Bethelmy (SysAdmin)" I have had good results with the following tapetype on an Exabyte 10H library changer. I hope this helps. define tapetype EXB-8505 { comment "Exabyte EXB-8505 drive on decent machine" length 5000 mbytes filemark 48 kbytes speed 1000 kbytes } ----