CAC 2015-10-24

prt

Tracking the channel command list

 1818  prta Request 10001 printer q3:  >ldd>include>syslog.incl.pl1
 1818  prta   from Anthony.SysAdmin.a 
00000 prt_iom_cmd
11111111 prt_cmd 40 2
DCW SEG 01016001 340100700601 000303000001 003767000001 003767000001

       340100 700601 IDCW cmd 34 code 01 ext 00 ec 0 ctrl 0

00000 prt_iom_cmd
11111111 prt_cmd 34 0

DCW SEG 01016002 000303000001 003767000001 003767000001 003767000001

       000303 000001 IOTD cp 0 nu 0 type 0 tally

2222222222222 ddcw 0 tally 1

According to prtdim_write.pl1

dcl 1 dcws aligned based (lp),                              /* DCW/data block */
    2 idcw bit (36),                                        /* instruction DCW */
    2 ddcw bit (36),                                        /* data xfer DCW */
    2 tdcw bit (36),                                        /* Transfer DCW or terminate DCW */
    2 data;                                                 /* data follows the DCW's */

DCW SEG 01016001 340100700601 000303000001 003767000001 003767000001
                  address   IDCW             IOTD

Okay… there is no MPC card for prta so prtdim assumes EURC MPC and generates different channel commands then I was observing.

dcl 1 prt_buffer aligned based (prt_bufferp),
    2 header,
      3 number fixed bin (6) uns unal,
      3 busy bit (1) unal,
      3 pad bit (4) unal,
      3 dcw_count fixed bin (7) uns unal,
      3 data_ends fixed bin (18) uns unal,
    2 idcw bit (36),
    2 ddcw (sdb.max_dcws + 1) bit (36) aligned;

Peek at the header:

DCW SEG 01016001 004001000304 [340100700601] 000303000001 003767000001 003767000001

00 4 001 000304   number 0 busy 1 dcw_count 1 data_ends 304

DCW SEG 01016102 014043001520 [340100700643] 000304000011 000315000015 000332000043

01 4 043 001520  number 1 bus7 1 dcw_count 43 data_ends 01520

Quite plausible.

Trying to fix up job parsing…

 1330  prta Request 10002 printer q3:  >user_dir_dir>SysAdmin>Anthony>test
 1330  prta   from Anthony.SysAdmin.a 
prt reset status
prt print
 014013000000
<\014\013\000\000>
prt reset status
prt print
 040040061060 060060062037 005101156164 150157156171 056123171163 101144155151 156056141037 145061060060 060062013002
<  10002\037\005Anthony.SysAdmin.a\037e10002\013\002>
 037024076165 163145162137 144151162137 144151162076 123171163101 144155151156 076101156164 150157156171 076164145163 164013002000
<\037\024>user_dir_dir>SysAdmin>Anthony>test\013\002\000>
 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 013002000000
<----------------------------------------------------------------------------------------------------------------------------------------\013\002\000\000>
 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 013003000000
<----------------------------------------------------------------------------------------------------------------------------------------\013\003\000\000>
 040052052052 052052052037 031052052052 052037012052 052013001000
< ******\037\031****\037\012**\013\001\000>
 052052037005 052037027052 052052052052 052037011052 052013001000
<**\037\005*\037\027******\037\011**\013\001\000>
 052052037034 052052037004 052052037010 052052037017 052052013001
<**\037\034**\037\004**\037\010**\037\017**\013\001>
 040052052052 052052052037 003052052037 004052052037 003052052052 052052052037 003052052037 004052052037 003052052052 052052052052 040040052040 052052040052 052037015052 040052052052 052052013001
< ******\037\003**\037\004**\037\003******\037\003**\037\004**\037\003*******  * ** **\037\015* *****\013\001>
 037006052052 037003052052 037003052052 040040052052 037010052052 052052052052 052052040040 052052037004 052052040040 052052040052 052040052052 037004052052 052037005052 052037004052 052013001000
<\037\006**\037\003**\037\003**  **\037\010********  **\037\004**  ** ** **\037\004***\037\005**\037\004**\013\001\000>
 037006052052 037004052052 040052052037 004052052052 052052052037 003052052037 004052052040 040052052037 004052052040 040052052040 052052040052 052037005052 052037005052 052037004052 052013001000
<\037\006**\037\004** **\037\004******\037\003**\037\004**  **\037\004**  ** ** **\037\005**\037\005**\037\004**\013\001\000>
 052037005052 052037005052 052052037012 052052040040 052052037004 052052040040 052052037004 052052040040 052052040052 052040052052 037005052052 037005052052 037004052052 013001000000
<*\037\005**\037\005***\037\012**  **\037\004**  **\037\004**  ** ** **\037\005**\037\005**\037\004**\013\001\000\000>
 040052052052 052052052037 006052052037 006052052052 052052052037 003052052037 004052052037 003052052052 052052052052 040040052052 040052052040 052052037004 052052052052 037004052052 037004052052 013001000000
< ******\037\006**\037\006******\037\003**\037\004**\037\003*******  ** ** **\037\004****\037\004**\037\004**\013\001\000\000>
 037013052052 052052013002
<\037\013****\013\002>
 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 013001000000
<----------------------------------------------------------------------------------------------------------------------------------------\013\001\000\000>
 061060057062 065057071063 040040061063 063060056061 040160144164 040115157156 037052160162 164141037042 123145162145 156151164171 040126141154 154145171040 105156147151 156145145162 151156147013 001000000000
<10/25/93  1330.1 pdt Mon\037*prta\037"Serenity Valley Engineering\013\001\000\000\000>
 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 055055055055 013003000000
<----------------------------------------------------------------------------------------------------------------------------------------\013\003\000\000>
 040040052052 052052037030 052052013001
<  ****\037\030**\013\001>
 040052052052 052052052037 027052052013 001000000000
< ******\037\027**\013\001\000\000\000>
 052052037004 052052037017 052052037005 052052013001
<**\037\004**\037\017**\037\005**\013\001>
 052052037004 052052040040 052040052052 052052052037 004052052052 052052052037 003052052052 052052052052 037004052052 052052052052 037003052040 052052052052 052037003052 052037004052 052013001000
<**\037\004**  * *****\037\004******\037\003*******\037\004******\037\003* *****\037\003**\037\004**\013\001\000>
 052052052052 052052052052 040040052052 037004052052 037005052052 037005052052 037004052052 040040052052 037004052052 040040052052 037004052052 037003052052 037003052052 013001000000
<********  **\037\004**\037\005**\037\005**\037\004**  **\037\004**  **\037\004**\037\003**\037\003**\013\001\000\000>
 052052037004 052052040040 052052037004 052052037005 052052037005 052052037004 052052040040 052052037004 052052040040 052052037004 052052037004 052052040052 052013001000
<**\037\004**  **\037\004**\037\005**\037\005**\037\004**  **\037\004**  **\037\004**\037\004** **\013\001\000>
 052052037004 052052040040 052052037004 052052037005 052052037005 052052037004 052052040040 052052037004 052052040040 052052037004 052052037005 052052052013 001000000000
<**\037\004**  **\037\004**\037\005**\037\005**\037\004**  **\037\004**  **\037\004**\037\005***\013\001\000\000\000>
 052052037004 052052040040 052052037004 052052037005 052052037005 052052037004 052052037003 052052052052 052052037003 052052037004 052052037005 052052013001
<**\037\004**  **\037\004**\037\005**\037\005**\037\004**\037\003******\037\003**\037\004**\037\005**\013\001>
 037075052052 052052013031
<\037=****\013\031>
 037024076165 163145162137 144151162137 144151162076 123171163101 144155151156 076101156164 150157156171 076164145163 164013002000
<\037\024>user_dir_dir>SysAdmin>Anthony>test\013\002\000>
 040040061060 060060062037 005101156164 150157156171 056123171163 101144155151 156056141037 145061060060 060062013002
<  10002\037\005Anthony.SysAdmin.a\037e10002\013\002>
 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 013000000000
<ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ\013\000\000\000>
 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 013001000000
<NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN\013\001\000\000>
 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 013000000000
<ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ\013\000\000\000>
 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 013001000000
<NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN\013\001\000\000>
 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 013000000000
<ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ\013\000\000\000>
 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 013001000000
<NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN\013\001\000\000>
 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 132132132132 013000000000
<ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ\013\000\000\000>
 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 116116116116 014000000000
<NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN\014\000\000\000>
prt reset status
prt print
 014000000000
<\014\000\000\000>
prt reset status
prt print
 164145163164 013000000000
<test\013\000\000\000>
prt reset status
prt print
 014011000000
<\014\011\000\000>
prt reset status
prt print
 052040040052 037010061060 060060062037 005076165163 145162137144 151162137144 151162076123 171163101144 155151156076 101156164150 157156171076 164145163164 037073061060 060060062013 001000000000
<*  *\037\01010002\037\005>user_dir_dir>SysAdmin>Anthony>test\037;10002\013\001\000\000\000>
 052040052040 052013001000
<* * *\013\001\000>
 052040052040 052013001000
<* * *\013\001\000>
 052040052040 052013001000
<* * *\013\001\000>
 040052040040 052013001000
< *  *\013\001\000>
 037014052052 052052052040 040052052052 052052037003 052052052052 040040052052 052052052013 001000000000
<\037\014*****  *****\037\003****  *****\013\001\000\000\000>
 037016052037 004052037006 052037010052 013001000000
<\037\016*\037\004*\037\006*\037\010*\013\001\000\000>
 037004052037 011052037004 052052052052 037004052052 052037005052 013001000000
<\037\004*\037\011*\037\004****\037\004***\037\005*\013\001\000\000>
 037003052037 012052037004 052037012052 037004052013 001000000000
<\037\003*\037\012*\037\004*\037\012*\037\004*\013\001\000\000\000>
 052052052037 013052037004 052052052052 052040040052 052052052037 005052013001
<***\037\013*\037\004*****  ****\037\005*\013\001>
 037003052013 001000000000
<\037\003*\013\001\000\000\000>
 037004052013 002000000000
<\037\004*\013\002\000\000\000>
 037177037004 052013001000
<\037\177\037\004*\013\001\000>
 052040040052 037177037001 052013001000
<*  *\037\177\037\001*\013\001\000>
 052040052040 052037177037 001052052052 013001000000
<* * *\037\177\037\001***\013\001\000\000>
 052040052040 052037177052 013001000000
<* * *\037\177*\013\001\000\000>
 052040052040 052037176052 013001000000
<* * *\037~*\013\001\000\000>
 040052040040 052013002000
< *  *\013\002\000>
 037177037004 052052052052 052013001000
<\037\177\037\004*****\013\001\000>
 052052052037 041044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044037042052 013001000000
<***\037!$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$\037"*\013\001\000\000>
 040040052052 037040044037 076044037041 052013001000
<  **\037 $\037>$\037!*\013\001\000>
 040040052040 052037037044 040040122145 161165145163 164145144040 061060057062 065057071063 040040061063 062071056071 040160144164 040115157156 037032044037 040052013001
<  * *\037\037$  Requested 10/25/93  1329.9 pdt Mon\037\032$\037 *\013\001>
 040040052052 037040044040 040117165164 160165164037 004061060057 062065057071 063040040061 063063060056 061040160144 164040115157 156037032044 037037052052 052052052013 001000000000
<  **\037 $  Output\037\00410/25/93  1330.1 pdt Mon\037\032$\037\037*****\013\001\000\000\000>
 052052052037 041044037076 044013001000
<***\037!$\037>$\013\001\000>
 037044044037 076044013001
<\037$$\037>$\013\001>
 037044044040 040160162151 156164145162 040161165145 165145040063 037014160162 164141037035 044037040052 052052013001
<\037$$  printer queue 3\037\014prta\037\035$\037 ***\013\001>
 052052052052 052037037044 037076044037 037052037003 052013001000
<*****\037\037$\037>$\037\037*\037\003*\013\001\000>
 052037003052 037037044040 040060040160 141147145163 037065044037 037052037003 052013001000
<*\037\003*\037\037$  0 pages\0375$\037\037*\037\003*\013\001\000>
 052037003052 037037044037 076044037037 052037003052 013001000000
<*\037\003*\037\037$\037>$\037\037*\037\003*\013\001\000\000>
 052037003052 037037044040 040061040154 151156145163 040141164040 044061056070 060040160145 162040061060 060060040154 151156145163 037027060056 060060040040 044037040052 052052013001
<*\037\003*\037\037$  1 lines at $1.80 per 1000 lines\037\0270.00  $\037 ***\013\001>
 040052052052 037040044037 076044013001
< ***\037 $\037>$\013\001>
 037044044040 040103150141 162147145040 164157040101 156164150157 156171056123 171163101144 155151156056 141037032060 056060060040 040044013001
<\037$$  Charge to Anthony.SysAdmin.a\037\0320.00  $\013\001>
 037044044037 076044037037 052052052052 052013001000
<\037$$\037>$\037\037*****\013\001\000>
 052052052052 052037037044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044044 044044044037 041052013001
<*****\037\037$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$\037!*\013\001>
 037003052037 177037002052 013001000000
<\037\003*\037\177\037\002*\013\001\000\000>
 040040052037 177037003052 013001000000
<  *\037\177\037\003*\013\001\000\000>
 037003052037 177052052052 052052013001
<\037\003*\037\177*****\013\001>
 052052052052 052013002000
<*****\013\002\000>
 037177037004 052013001000
<\037\177\037\004*\013\001\000>
 037177037004 052013001000
<\037\177\037\004*\013\001\000>
 052037003052 037176052052 052052052013 001000000000
<*\037\003*\037~*****\013\001\000\000\000>
 052052052052 052037176052 013001000000
<*****\037~*\013\001\000\000>
 052037003052 037176052013 003000000000
<*\037\003*\037~*\013\003\000\000\000>
 037177037004 052052052052 052013001000
<\037\177\037\004*****\013\001\000>
 052052052052 052037177037 002052013001
<*****\037\177\037\002*\013\001>
 037003052037 177037002052 013001000000
<\037\003*\037\177\037\002*\013\001\000\000>
 040040052037 177037002052 013001000000
<  *\037\177\037\002*\013\001\000\000>
 040052037177 037002052052 052052052013 001000000000
< *\037\177\037\002*****\013\001\000\000\000>
 052052052052 052013002000
<*****\013\002\000>
 037177037006 052052052013 001000000000
<\037\177\037\006***\013\001\000\000\000>
 037177037005 052052013001
<\037\177\037\005**\013\001>
 037177037004 052040052013 001000000000
<\037\177\037\004* *\013\001\000\000\000>
 037177037005 052052013001
<\037\177\037\005**\013\001>
 037014061060 060060062037 005076165163 145162137144 151162137144 151162076123 171163101144 155151156076 101156164150 157156171076 164145163164 037073061060 060060062037 014052052052 013005000000
<\037\01410002\037\005>user_dir_dir>SysAdmin>Anthony>test\037;10002\037\014***\013\005\000\000>
 1330  prta   Charge for request 10002: $0.00  (1 lines,  0 pages)

Looking at tape_archive

ta load_table bar
tape_archive:  Creating >user_dir_dir>SysAdmin>Anthony>bar.ta.

tape_archive: Enter volume name of first volume:    ta2v1
Mounting volume "ta2v1" with no write ring
Mounted ANSI volume "TA2V1" (recorded at 800 BPI), on device tapa_01
mtape_: Tape positioned on leader. While attempting a bsr control order.
mtape_: Tape positioned on leader. Attempting to backspace over HDR1 label reco
\crd of volume TA2V1.
tape_archive: Tape positioned on leader. Attaching the tape input switch.

Looks like a positioning problem?

DBG(616476881)> TAPE ERR: Set file permit?
DBG(616490445)> TAPE DEBUG: mt_cmd: Set 800 bpi
DBG(616495003)> TAPE DEBUG: mtReadRecord: Read binary record
DBG(616495003)> TAPE DEBUG: sim_tape_rdrecf returned 0, with tbc 80
DBG(616585525)> TAPE DEBUG: mt_cmd: Rewind
DBG(617154045)> TAPE DEBUG: mt_cmd: Rewind
DBG(617181911)> TAPE DEBUG: mt_cmd: Set 800 bpi
DBG(617227809)> TAPE DEBUG: mtReadRecord: Read 9 record
DBG(617227809)> TAPE DEBUG: sim_tape_rdrecf returned 0, with tbc 80
DBG(617248259)> TAPE DEBUG: mtReadRecord: Read 9 record
DBG(617248259)> TAPE DEBUG: sim_tape_rdrecf returned 0, with tbc 80
DBG(617258405)> TAPE DEBUG: mtReadRecord: Read 9 record
DBG(617258405)> TAPE DEBUG: sim_tape_rdrecf returned 0, with tbc 80
DBG(617275661)> TAPE DEBUG: mt_cmd: Backspace Record
DBG(617275661)> TAPE DEBUG: mt_cmd: Tally of zero interpreted as 64
That seems unlikely
DBG(617275661)> TAPE NOTIFY: mt_iom_cmd: Backspace 3 records

Rework some of the tape code:

ta load_table bar
tape_archive:  Creating >user_dir_dir>SysAdmin>Anthony>bar.ta.

tape_archive: Enter volume name of first volume:    ta2v1
Mounting volume "ta2v1" with no write ring
Mounted ANSI volume "TA2V1" (recorded at 800 BPI), on device tapa_01
tape_archive: File does not exist. There is no valid table on the tape.

DBG(2943106131)> TAPE DEBUG: mt_cmd: Set 800 bpi
DBG(2943152885)> TAPE DEBUG: mtReadRecord: Read 9 record
<VOL1TA2V1                            FHDMULT001                                3>
DBG(2943173335)> TAPE DEBUG: mtReadRecord: Read 9 record
<UVL1FHD 93297   SERENITY VALLEY ENGINEERING     ANTHONY.SYSADMIN.A              >
DBG(2943183481)> TAPE DEBUG: mtReadRecord: Read 9 record
<HDR1!!DUMMY FILE ID!!******00010001000100 00000 00000 000000MULTICS ANSI2       >
DBG(2943199671)> TAPE DEBUG: mt_cmd: Backspace Record
DBG(2943199671)> TAPE DEBUG: mt_iom_cmd: Backspace record tally 1
DBG(2945752389)> TAPE DEBUG: mtReadRecord: Read 9 record
<HDR1!!DUMMY FILE ID!!******00010001000100 00000 00000 000000MULTICS ANSI2       >
DBG(2945781015)> TAPE DEBUG: mtReadRecord: Read 9 record
DBG(2945781015)> TAPE NOTIFY: mtReadRecord: EOF: Tape mark encountered
DBG(2948009753)> TAPE DEBUG: mt_cmd: Forward Skip File
DBG(2948024251)> TAPE DEBUG: mtReadRecord: Read 9 record
<EOF1!!DUMMY FILE ID!!******00010001000100 00000 00000 000000MULTICS ANSI2       >
DBG(2948035753)> TAPE DEBUG: mtReadRecord: Read 9 record
DBG(2948035753)> TAPE NOTIFY: mtReadRecord: EOF: Tape mark encountered
DBG(2948045327)> TAPE DEBUG: mtReadRecord: Read 9 record
DBG(2948045327)> TAPE NOTIFY: mtReadRecord: EOF: Tape mark encountered
DBG(2948094629)> TAPE DEBUG: mt_cmd: Backspace File
DBG(2948094629)> TAPE DEBUG: mt_iom_cmd: Backspace file tally 1
DBG(2948094629)> TAPE NOTIFY: mt_iom_cmd: Backspace 1 records
DBG(2948747165)> TAPE DEBUG: mt_cmd: Request status: 4001
DBG(2948753439)> TAPE DEBUG: mt_cmd: Rewind

Contents of tape

VOL1TA2V1                            FHDMULT001                                3
UVL1FHD 93297   SERENITY VALLEY ENGINEERING     ANTHONY.SYSADMIN.A              P
HDR1!!DUMMY FILE ID!!******00010001000100 00000 00000 000000MULTICS ANSI2
mrk
mrk
EOF1!!DUMMY FILE ID!!******00010001000100 00000 00000 000000MULTICS ANSI2       P
mrk
mrk
HDR1ATTRIBUTEFILE0001TA2V1 00010001000100 93297 99365 000000MULTICS ANSI2       P
HDR2S0819200000                                13 00                            P
mrk
bin data
mrk
9
9
mrk
9
9
mrk
bin data
mrk
9
9
mrk
9
9
mrk

EOF1ATTRIBUTEFILE0001TA2V1 00010001000100 93297 99365 000001MULTICS ANSI2       P

Double tape marks?

Recreate the tape…

ta a foo prtdim_write.pl1
tape_archive:  Creating >udd>SysAdmin>Anthony>foo.ta.
r 19:08 0.129 8

Enter volume name of new first volume:    ta3v1
Mounting volume "ta3v1" with a write ring
Mounted blank volume "ta3v1" on device tapa_02
mtape_: The requested action was not performed.
Unrecoverable error detected on volume ta3v1, mounted on device tapa_02.
Physical position: file # 0, block # 1.
Hardware status: "Device Data Alert. End of tape mark detected.".
mtape_: Unable to perform critical I/O.
While rewinding and setting density to 1600 BPI on volume  prior to volume init
\cialization
tape_archive: Unable to perform critical I/O. Unexpected error while processing
\c >udd>SysAdmin>Anthony>prtdim_write.pl1
tape_archive: Unable to perform critical I/O. >udd>SysAdmin>Anthony>prtdim_writ
\ce.pl1 could not be appended to volume set; removing request.
tape_archive: All components of foo.ta have been deleted.
mtape_: The requested action was not performed.
Unrecoverable error detected on volume ta3v1, mounted on device tapa_02.
Physical position: file # 0, block # 1.
Hardware status: "Device Data Alert. End of tape mark detected.".

Gah. broke it.

ta a foo prtdim_write.pl1
ta go foo
ta4v1
ta load_table bar
ta4v1
ta t bar
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