The orginal question was how to connect an HP C1533A DDS 2 to a DIgital Unix
and use the compression mechanism by software ?
First of all , thank you to :
alan_at_nabeth.cxo.dec.com
(Alan Rollow - Dr. File System's Home for Wayward Inodes.)
and
Andrew Greer <Andrew.Greer_at_vuw.ac.nz>
The good solution is to obtain from the reseller the HP DDS Configuration Guide
and all the informations are in it.
In particular how to modify cam_data.c, by adding the description for the device
< /* 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
< },
<
Where the main thing which was difficult to guess is the number 43 at the end
(on all DEC devices it's 36).
with rmtxh and rmtxm you have the compression enabled, with rmtxl and rmtxa you
have the compression disabled.
Daniel
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Received on Wed Oct 11 1995 - 10:22:06 NZDT