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[Notebook page 33]

1830 18 Jan 68
Disk error 211-0-1
DR Bits 4,5,7,9,12,13,14
211-0-1 3,4,5,6 11,12,14,16
" 4,5,7,9 12,13,14

then ran for 4 cycles with no
errors
SRR

1955 18 Jan 68
Disk error 217-2-173
1,4,5,6,7,11,12,13,15,17
SRR

2125 18 Jan 68
Disk error 211-0-1 4,5,7,9,12,13,14
SRR

0040 19 Jan 68
Loaded Disk at 2200 found
bit 12 to disk failing 167 v21 LCC
(LCC) card was erased. bit 12 came back.
Explored current manifestation of 533 bug.
Its still there. Currents + Voltages for
Read and Write in core 3 seem proper
for 533 and other addresses.

Put disk in read only selftest.
Is still running after 5 cycles
SRR