SC1041_SAIL_PDP-6_hardware_log_1968-01

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2145 12-Jan-67 Disk says "Read error" and "slow down". Band = 151 8 TRK = 2, SAR = 0635₈, disk is in read + trk set rpt. Recoverable. John Sauter

12:04 13-Jan 67 Found dish Read error Band 217₈ TR 2 SAR=1526₈ recoverable temp=88 in check WSW

13:00 13 Jan 67 DP character bad adjusted video sensitivity and improved them a little WSW

15:30. 13 Jan 67 DP transition from vector to ch mode still screws up (does not wait long enough & sinks up 1^st chn) Ch timing dependent on position in ward so changes this caves character to move on screen

edit [?] both of above - see me for details & drive

Characer look like SHIT!! WSW

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1600 13 Jan 68 Disk temp - 88° Took of self Read only test of Track 2's Found errors: 211-0-1, 2, 3, 4, 5—many times most recoverable 1 pass 166-0-1526(2x) 211-0-1 of cores 2 passes 211-0-1 166-0-1470, 1512, 1526 Put back on TKSet Rpt on TRK2's Note that most solid errors are on TRK 0 at high or low temp. Turned off clean air unit. Will try to record what happens as disk warms up. SRR

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2015 13-JAN-68

Found disk saying "Read error". Band=133₁₀, TRK=2, SAR=30₈ off line (fast), inhibit read compare, unit repeat, track set repeat, read. Recoverable TEMP Recorder says 90°, has for some time. [time scale says 8 3⁄5 HRS] J. Sauter

2040 13-JAN-68 Read error. BAND=133₁₀, TRK=2 SAR=22, manual controls same as before, TEMP just above 90°. Recoverable. J. Sauter

2044 13-JAN-68 Read error. Band=133₁₀, TRK=2 SAR=56, TEMP=90°, Recoverable. John Sauter

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2210 13-JAN-68 Disk read error. BAND=133₁₀, TRK=2, SAR=23₈, TEMP=90°. Recoverable. J. Sauter

2220 13-JAN-68 Read error. Band=133₁₀, TRK=2, SAR=56₈, TEMP=90°. Recoverable. J. Sauter

2350 13-JAN-68 Read error. BAND=133₁₀, TRK=2, SAR=56₈, TEMP=90°. Recoverable. stopped next time around. BAND=133₁₀, TRK=2, SAR=131. I am putting disk on Band Repeat. (Band=133)

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MTBF about 10 sec on BAND repeat. Error sar's: 56₈, 56₈, 22₈ 56₈, 56₈, 56₈, 117₈, 107₈, 107₈, 56₈ 56₈, 16₈, 136₈, 56₈, 56₈, 117₈, 107₈, 56₈, 53₈, 56₈, 56₈, 41₈, 56₈, 54₈, 53₈, 56₈, 136₈, 22₈, 107₈, 107₈, 107₈, 107₈, 16₈, 136₈, 56₈, 117₈, 56₈, 16₈, 117₈, 117₈, 56₈

I hope that is enough to keep the disk fixers busy. The above errors were recorded between 2355 13-JAN-67 and 0005 14-JAN-67. It takes the disk about as long to make an error as it does me to write it down. In its present state the disk is quite unuseable. J. Sauter

0115 14 Jan 68 Replaced lamp for BAND REG BIT 4. It was burned out. It was last known to be operating at 1600 13 Jan 67