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- Newsgroups: comp.sys.sun.admin
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!gatech!hubcap!opusc!usceast!tim
- From: tim@hssc.scarolina.edu (Tim White)
- Subject: Re: DAT's on 4.1.2
- Message-ID: <tim.722006764@andy.hssc.scarolina.edu>
- Sender: usenet@usceast.cs.scarolina.edu (USENET News System)
- Organization: USC Department of Computer Science
- References: <Bx9HMI.5Eu@mail.boi.hp.com> <2592@bigfoot.first.gmd.de>
- Date: 17 Nov 92 13:26:04 GMT
- Lines: 42
-
- ats@bigfoot.first.gmd.de (Andreas Schulz) writes:
-
- >In article <Bx9HMI.5Eu@mail.boi.hp.com> kde@boi.hp.com (Keith Emmen) writes:
- >> st0 at esp0 target 4 lun 0
- >> st0: <Vendor 'HP ' Product 'HP35450A -A'>
- >>
- >>but when we try to talk with mt(1), we see: (there is no device file st0)
- >>
- >First better make a "MAKEDEV st0" under /dev to get all the necessary
- >devices.
- >And for your DAT tape, get a better disctributor :-).
- >You must change the file /sys/scsi/targets/st_conf.c and add into
- >struct st_drivetype a new entry :
- >/* HP DAT 35480A */
- >{
- > "HP35480A", 2, "HP",
- > ST_TYPE_EXABYTE, 1024,
- > (ST_VARIABLE | ST_BSF | ST_BSR),
- > 5000, 5000,
- > { 0x00, 0x00, 0x00, 0x00 },
- > { 0, 0, 0, 0 }
- >}
-
- And if you want it fast without kernel modifications just set dip switches
- 1,2,3,4,5 = 1 and switches 6,7,8 = 0. This is for Sun machines. And if the
- tapehost is ever down you can move your DAT without patching another kernel.
-
- Other tips for Sun.
-
- When using cpio use the blocksize option ( -B ) and use a blocksize of
- 5120 or greter. This will improve performance significantly.
-
- When using dump set the tape size and density to 15000. This will allow
- you to fill a 90m tape.
-
- Above info from the HP document "Configuring HP DDS Drives for use in Sun
- Workstations". See your vendor for this. I got mine from Dallas Digital.
- --
- ==============================================================================
- Tim White University of South Carolina
- tim@otis.hssc.scarolina.edu Humanities and Social Sciences Laboratory
- (803)-777-7840 Columbia, S.C. 29208
-