C1553A, compression, again

From: Jim Johnson - UniPrise Systems - 617.229.1105 <jj_at_uniprise.com>
Date: Fri, 13 Oct 1995 12:05:26 -0400

                                       
Hi All,

Sorry to rehash this again but I'm missing something...

I too have a HP C1553A on a Sable running 3.2 of DEC Unix and would
like to be able to control compression via software.

I have rebuilt my kernal successfully and rebooted using it. My
cam_data.c has...


 /* HP C1533A - RDAT drive */
 {"HP C1533A", 14, DEV_TZRDAT, (ALL_DTYPE_SEQUENTIAL << DTYPE_SHFT) |
   SZ_RDAT_CLASS,
   (struct pt_info *)ccmn_null_sizes, SZ_NO_BLK, (DEC_MAX_REC - 1),
   &tlz06_dens, NO_MODE_TAB, SZ_NO_FLAGS,
   NO_OPT_CMDS, SZ_READY_DEF, SZ_NO_QUE, DD_REQSNS_VAL | DD_INQ_VAL,
   43, 64
 },


added to it.

I rebuilt the devices and using /dev/rmt0l or /dev/rmt0a still
produces a tape unreadable by a vanilla tlz04.

Any ideas on what I missed?

Thanks,

-- 
========================================================================
Jim Johnson                                The Optimist believes we live  
UniPrise Systems Inc.                      in the best of all possible
email: jj_at_uniprise.com                     worlds, the Pessimist fears
Voice: 617.229.1105   Fax: 617.229.0014    this is true.
========================================================================

Received on Fri Oct 13 1995 - 17:33:29 NZDT