PROBLEM:  (79700) (PATCH ID: OSF505-074)
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A system hang can be encountered while booting.  This hang occurs during 
hardware probe of the fdi floppy device.  

A sample boot sequence is:

...
scsi6 at isp3 slot 0
isa0 at pci0
gpc0 at isa0
gpc1 not probed
ace0 at isa0
ace1 at isa0
lp0 at isa0

(system hang)

Often the next message would be:
fdi0 at isa0
fd0 at fdi0 unit 0
PROBLEM: (80541) (PATCH ID: OSF505-166)
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Compaq has determined in laboratory testing that there is a theoretical 
possibility that during read and write operations to the floppy disk on
DS10, DS10L and ES40 AlphaServers and VS10 and XP900 AlphaStations, a
single byte of data may be inaccurately read or written without notice
to the user or system.  The potential for this anomaly exists only if
floppy data read and write operations are attempted while there is
extremely heavy traffic on these Alpha systems' internal input/output
busses.  Although Compaq has observed the anomaly only in laboratory
tests designed to create atypical system stresses, including almost 
constant use of the floppy disk drive, we are supplying this patch to
address this potential issue.


PROBLEM: (83298) (PATCH ID: OSF505-200)
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The system may core dump when accessing the FDI floppy.  A typical stack trace
is below:
panic() ["../../../../src/kernel/bsd/subr_prf.c":1401]
biodone() ["../../../../src/kernel/vfs/vfs_bio.c":1560]
fd_strategy_done() ["../../../../src/kernel/io/dec/fdi/fd.c":3045]