I'm having problems with backing up sql servers which are diskstaged to a
hard drive and then moved to tape, but I keep getting this error:

Event Type: Error
Event Source: MSSQLSERVER
Event Category: (2)
Event ID: 17055
Date: 12/1/2005
Time: 6:21:56 AM
User: NT AUTHORITY\SYSTEM
Computer: NARCHIVE-05
Description:
18210 :
BackupVirtualDeviceFile::RequestDurableMedia: Flush failure on backup device
'VNBU0-2128-3932'. Operating system error 995(The I/O operation has been
aborted because of either a thread exit or an application request.).


For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 22 47 00 00 10 00 00 00 "G......
0008: 0c 00 00 00 4e 00 41 00 ....N.A.
0010: 52 00 43 00 48 00 49 00 R.C.H.I.
0018: 56 00 45 00 2d 00 30 00 V.E.-.0.
0020: 35 00 00 00 00 00 00 00 5.......
and I have seen some indication from the details of the job that the disk
is getting full, but there does appear to be room.