25

0125 2 OCT 67

Put disk in self test.

SRR

0220 2-OCT-67

Began running diagnostic. Disk
is on line.

Bit 28 is being dropped sometimes.
It happened three times while address testing,
then the address tester ran all the way through
without error. The three times were : record 231267
word 10, record 231663 word 14, record 231665
word 20.

'Random DATA' found garbage on BAND=
128+4+2+1, TRK=0, but re-running found
good data there but SAME garbage (651703)
on BAND=64+32+8+1 TRK=1. On re-
running it happened on BAND=64+32+16+8+2,
TRK=1. While writing on this band (I didn't
notice whether TRK=1 or 0) the SAR stopped