i got the same thing as tom - iscsi 2.05 as well.


created 500gb volume, mapped, formatted and put some files.
created 250gb snapvol, associated it with the 500gb vol.
delete the 250gb snapvol and i get same error(below).

also noticed this:
create 500gb volume, map
create 250gb snapvol, associate with 500gb volume.
try to format the 500gb volume and fail - same event(below)
delete the 250gb snapshot volume
try to format the 500gb volume and it works!
now i can create the snapvol and associate it without error.


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Event Type: Error
Event Source: iScsiPrt
Event Category: None
Event ID: 20

Description:
Connection to the target was lost. The initiator will attempt to retry the connection.
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strange eh?