Su •• ary of Aaendaents
for SY20-0886-0 as updated by TNL SN25-0467 V8/370 Release 5 PLC 12 VARY PROCESSOR ONLINE/OFFLINE SUPPORT !~! ~nd ~h~~g!g: programming Support V8/370 attached processor CAP) provides
support to enhance the reliability,
availability, and serviceability of the
158 and 168 attached processors, and the
158 and 168 asymmetric 8P systems. Thi~ 3up~crt allv.s ~~~ attached processor to be taken offline to make needed repairs, and then be brought back
online without affecting the main processor.
xii IBM VM/370 System Logic and Problem Determination--Voluae 1

3340/3344 ALTERNATE TRACK SUPPORT Changed: Program Support
Software error recovery procedures BU. provide for switching to an alternate
track ~h€n an atteapt to do I/O on a
defective 3340 or 3344 track results in a track condition check. Logic
affecting CP I/O, Diagnose I/O, and SIO issued from a virtual machine is
changed. These logic changes are
reflected in this publication. summary of Amendments
for SY20-0886-0 as updated by TNL S125-0446 V!/310 Release 5 PLC 6 Summary of Amendments xiii