During a system recovery restore recently, certain files came back empty (0
bytes).

This is very odd. The client is an NT system. According to the NetBackup
database (doing a grep for HPNSCSI.SYS):
919 21064 34 52 227345 1 0 0 -1 /C/HP/DRIVERS/NRAIDADP/HPNSCSI.SYS 33216
root root 20944 1004232802 953107976 953107976
13485 0 37 52 2451158 1 0 0 -1 /C/WINNT/system32/drivers/hpnscsi.sys 33216
root root 20944 1004233243 953107976 315532800
0 0 34 52 0 2 0 0 -1 /C/HP/DRIVERS/NRAIDADP/HPNSCSI.SYS 33216 root root
20944 1004232802 953107976 953107976
0 0 37 52 0 2 0 0 -1 /C/WINNT/system32/drivers/hpnscsi.sys 33216 root root
20944 1004233243 953107976 315532800

This shows that HPNSCSI.SYS is in fact 20,944 bytes large.

I attempted to restore these (and other) files to an alternate location and
system.

I found the files in /C/HP/.... (C:\HP\...) all came back OK.
The files in /C/WINNT/... (C:\WINNT\...) all came back with 0 bytes.

This is more that just a little disturbing, and possibly frightening from a
Backup Admin POV.

Surely I'm not the first to witness this kind of event. What have other
people who have found this done?

Thanks

Jason

--
Jason Ahrens
Systems Administrator/Backup Specialist
PSINet Canada Inc., a TELUS company
http://www.psi.ca
The Future is Friendly