paolucci@snll-arpagw.UUCP (Sam Paolucci) (06/07/89)
Does anybody know of a SCSI stream tape backup system that works on the Amiga? I know that there are lots of SCSI systems that you can buy, but has anybody written a device driver for one? -- -+= SAM =+- "the best things in life are free" ARPA: paolucci@snll-arpagw.llnl.gov
new@udel.EDU (Darren New) (06/09/89)
In article <120@snll-arpagw.UUCP> paolucci@snll-arpagw.UUCP (Sam Paolucci) writes: >Does anybody know of a SCSI stream tape backup system that works on the >Amiga? Me too, please. I got a 60Meg SCSI tape drive when I bought the pahr sply for my drive because the man selling it didn't feel like openning the box to take it out (now THATS a bargain). But I have no docs or drivers :-(. -- Darren
mpalumbo@sunybcs.uucp (Michael Palumbo) (06/09/89)
>In article <120@snll-arpagw.UUCP> paolucci@snll-arpagw.UUCP (Sam Paolucci) writes: >>Does anybody know of a SCSI stream tape backup system that works on the >>Amiga? > >Me too, please. I got a 60Meg SCSI tape drive when I bought the pahr sply >for my drive because the man selling it didn't feel like openning the box >to take it out (now THATS a bargain). But I have no docs or drivers :-(. > -- Darren Ditto. I finally received the auto-boot conversion kit from Pacific Peripherals so that my hard drive boots. I am not looking for a tape backup for my 65 MB hard drive (ST277N). I wonder if the device driver I received for Pacific Peripherals will work on devices that are not disk drives. Does any one know? Do I need another device drive? I just received the SCSI ANSI Spec, it seems straight forward. Does anyone know if the device driver example in the new ROM Kernal Manual (for a RAM disk) would be accurate for a place to start to write a device driver? I know this seems to be alot of questions. Answers to any or all of the above questions appreciated. thanks in advance. mike palumbo
barrett@ektools.UUCP (Chris Barrett) (06/09/89)
>In article <120@snll-arpagw.UUCP> paolucci@snll-arpagw.UUCP (Sam Paolucci) writes: >>Does anybody know of a SCSI stream tape backup system that works on the >>Amiga? > I have gotten my 60 Mb SCSI tape drive to work with the C.Ltd SCSI interface and their SCSIDos 3.n. I don't have it written as a DOS driver yet, but I what I do have is a TCopy, TErase, TRewind, TDir, TMount, and TDisMount. I use my own layout on the tape, it's not compatible with tar, I'm planning that for the next version, along with a tape.driver for DOS. If you don't have a C.Ltd interface, then these won't be of much use. The TCopy command is not very fast also, about 1.5 hours for 10 Mb, don't really know why yet, I'm still learning about how the drives work and what SCSI can really do. If any one else can supply me with code on how to read a tar format, other than the unix man page, I would appreciate it. If interested, drop me a line. Chris -- barrett@ektools ( Chris Barrett ) rochester!kodak!ektools!barrett
hcj@lzaz.ATT.COM (HC Johnson) (06/13/89)
In article <1942@ektools.UUCP>, barrett@ektools.UUCP (Chris Barrett) writes: > >In article <120@snll-arpagw.UUCP> paolucci@snll-arpagw.UUCP (Sam Paolucci) writes: > >>Does anybody know of a SCSI stream tape backup system that works on the > >>Amiga? > > > I have gotten my 60 Mb SCSI tape drive to work with the C.Ltd SCSI interface > ...not very fast also, about 1.5 hours for 10 Mb, don't really know why yet, I've worked with a SCSI tape on both PC and ATARI. In the default mode this bugger writes one 512 byte block per request as the sequence: write block write a long blank space backup This take greater than a second, and it is S L O W!! The trick(s) is to configure the tape unit into burst mode (part of the config command) and then deliver at least 16 blocks of 512 at a time, and don't waste much time between blocks. for example, the unix command find . -print | cpio -oc > tape is VERY slow find . -print | cpio -oc | dd of=tape obs=500b(locks) is fast. I use this to get MINIX to play fast on the Atari. On TOS (native to ST) it is possible to read the disk in 16 block chunks in time to write to the tape and keep streaming. Bottom line: configure the tape to burst mode either write large bursts infrequently, or write bursts of 16 quickly, and your streaming tape will make you happy. Howard C. Johnson ATT Bell Labs att!lzaz!hcj hcj@lzaz.att.com