SC1041_SAIL_PDP-6_hardware_log_1968-01

[notebook page] 12

2200 11 Jan 68 Disk Read error Recoverable Band 202 trk 0 Sa = 160 Occured sometime between 1200 & 1500 SRR

[printout taped to page] CORE PARITY ERROR, LOCATION 000000110062 OPND = 040020640526 PC = 75000000 T ) [handwritten note] about 2030 11 Jan 68 Core 2 [end printout]

[printout taped to page] RELOCATE = 200000 BUFFER = 77777

PROGNOSIS GEFFECTIVE ADDRESS +1 MODIFIED, AR FAILED IF NO OTHER ERROR MESSAGE PRINTED, IF OTHER MESSAGE PRINTED, PERHAPS THIS MAY BE DISREGARDED; [handwritten note next to printout] Testing Ampex [end printout]

0930 12 Jan 68 Disk Read Error -- Recoverable Band = 131₈ TRK = 0 SA = 117 Sometime after 0000

1000 17 Jan 68 Button No 28. of SW buttons checked extensively. No problems detected. Ted P...

[Notebook page 13]

10:00 12 Jan 68

Camera was misplacing data. Found memories were de-interleaved. P. Petit is a crock. SRR

CORE PARITY ERROR, LOCATION 000000151551 OPND = 000057777777 PC = 350000137431 INSTR = 200553020257 DATE = 000641062214 TIME = 1007:57 Core 1 Note: 10:10 1/12/67 camera was running Ted Panofsky

12 Jan 68

Replaced "Power on" lamp on tecktronix 547 scope (the one with the current probe) Ted Panofsky

12 Jan 68

A bright band and dark band, each about 1" wide appeared on the TV monitor (and data), one near the top and the other at the bottom. After while it went away. Steve suspects our favorite filter capacitor Karl

1200 12 Jan 68 Recoverable disk read error band = 2028 Tk 0 SA=0 band=202, Tk 0 SA=27 band=202, Tk 0 SA=17,21,63,2157 SRR

1200 28 Jan 68

More disk errors

Band=131₈, TK=0, SA=17,26,116 (5 times) Band=202, TK=0, SA=2230 Band=131, TK=0, SA=11,13,42 (2x) Band=213, TK=0, SA=111 Band=171, TK=0, SA=104 Band=131, TK=0, SA=3,5,70 Band=215, TK=0, SA=2256 Band=202, TK=0, SA=47,63,103 (2x) Band=131, TK=0, SA=57(3x), 61 1220 now Band=202, TK=0, SA=47,50,57,61(2x) Band=172, TK=0, SA=20(2x) Band=202, TK=0, SA=55(2x) Band=131, TK=0, SA=27,36,64,70(7x) Band=202, TK=0, SA=5(2x),10(2x),16(2x) Band=131, TK=0, SA=11,23 Band=202, TK=0, SA=2,5,31,34,42,61,107 2277

Temp rec says ~91° so far there hasn't been a pass with out errors my hand is tired. Flow is 6 gpm

Apparently all the errors since the 10th happen when the temp is noticeably above 90° SRR

1415 28 Jan 68 LT PEN on an III reset # DP SRR

1445 28 Jan 68 LT PEN in FLAG on in DP. Reset it. Console 0 was on. SRR

[notebook page 15]

1500 28 Jan 68 At 1415 turned on clean air unit to LOW Now temp recorder indicates 88°. Read only test restarted. 3 passes so far give no error. SRR

1500 28 Jan 68 LT PEN FLG on DP is on. Console 0 is still on. NO programs using the DP have been run. Reset DP SRR

1545 28 Jan 68 LT PEN FLG is on DP is on. Console 0 is still on. No pgms as before. Turned off console 0. Reset DP SSR

1545 28 Jan 68 Read error on Disk. 211-0-1526 (3x) Interior temp seems to have stabilized at 88° also at 211-0-1016, 1466(6x), 1522(7x), 1527(14x) 211-0-1446 (2x), 1466, 2216 211-0-1000(2x), 1526( permanent) set on BAND REPEAT on band 210 Left clean air blower on. SSR

16

1600 12 Jan 68 LT PEN FLG in DP on. All consoles have been off since last reset No DP pgms have been run. Reset DP SRR

1730 12 Jan 68 DP LT PEN FLG STILL off Disk temp have been stabilized at 88°. 211-0-4 has solid error. Put disk on TRK set repeat with TRK 2 cycles correctly. No SRR

1800 12 Jan 68 PM'd lineprinter: cleaned print drum, Vacuumed all, and replaced Ribbon.

17:46 12 Jan 68 L.P. FLG on in DP cleared. WBW