33

29

1400 16 Jan 68

At about 1145 started temperature
cycling under floor air cond. to test
Disk sensitivity to temp changes. Results
are occasional parity errors that seem
to kill the system. Ran BLT for about
10 min at 1230 and found no errors
Subsequently the system has died twice
with random fatal parity errors. Reloaded
system and set STOP on parity. Got parity
error at 7075 cents = 100
System died

See below

LRR
1400 16 Jan 68
Completed P.M. all TTYs
Jesse Gonzales

CORE PARITY ERROR, LOCATION 000000007075 OPND = 000000000100
DATE = 000641102572 TIME = 1346:36
16 Jan 68
Core 2

CORE PARITY ERROR, LOCATION 000000010075 OPND = 400000000002
PC = 740000007075 INSTR = 000000000100 Core 2
DATE = 000641102573 TIME = 1346:51

Under floor air was about 60 degree at
time. Perhaps thermal gradients?
LRR

The left drive on DTA1 is much too tight.
J Gleeson