[daip] error with DAT and FITTP

[Patrick P Murphy]

Writing to daip instead of Kevin directly, in case Eric or Amy or
someone gets to it first.

On Tue, 21 Sep 2004 10:17:06 -0700 (MST), Kevin Healy
   <KEVIN.HEALY at asu.edu> said: 

> I'm trying to write some data onto a DAT tape using FITTP.  I am getting the
> following errors:

yso.la> FITTP1: Writing beginning-of-write EOFs
yso.la> FITTP1: ZTAPE: LUN128 IO ERROR AT   1 OP OF BEGW SYS ERR CODE 0005
yso.la> FITTP1: ZERROR: IN ZTAP2 ERRNO = 5 (Input/output error)
yso.la> FITTP1: ERROR     3 BEGINNING WRITES WITH EOFS

> The machine is a PC architecture workstation running RedHat Linux 7.x.
> The DAT drive is connected by a SCSI bus.  

Here's a checklist for him:

   1.  Verify that the no-rewind device (/dev/nst0) is used in the 
       $NET0/TPDEVS.LIST file.
   2.  Check permissions on /dev/nst0; does he have read/write access?
   3.  Perform "mt -f /dev/nst0 status" which should show, e.g.:
          SCSI 2 tape drive:
          File number=-1, block number=-1, partition=0.
          Tape block size 0 bytes. Density code 0x0 (default).
          Soft error count since last status=0
          General status bits on (4050000):
           WR_PROT DR_OPEN IM_REP_EN
       With a tape in the drive at BOT, the file and block numbers
       should be zero.  If the tape block size is not 0, set it thus:
          mt -f /dev/nst0 setblk 0
       (Though I think the AIPS Z routines do this anyway).
   4.  Verify that he can write stuff to tape:
          dd if=/some/FITS-file.fits bs=2880 count=1 of=/dev/nst0
   5.  Check /var/log/messages for "st0:" or "st1:" or whatever errors.

It could well be a flaky drive, in which case step 5 will show up
something.

HTH.
				- Pat