134

124

0659 19 Dec 67
Ran BLTST on 2.8 and
Disk diagnostic set to WRITE on disk
Got parity error at 132333
data=772203 112333
772333 112333 dropped bits 11, 13, 14
split sync
167 JB DN to Disk MA=143002

Many parity errors, with disk both
reading & writing. The parity errors
seem to depend only on 167 activity.
Perhaps poor margins in core 3, a duty cycle
executive problem, or most likely
a problem associated with look ahead.
Why always random bits in the LH word?
SRR

0745 18 Dec 67
TTY 1 carriage return Bouncer
SRR

Repaired
19-Dec 67
Earl

OH YEAH?