Backup fails with Operating system error 33

Backing up a large '78 GB' database to a compressed folder
gives this error: BackupMedium::ReportIoError: write
failure on backup device '*replaced file name here*.BAK'.
Operating system error 33(The process cannot access the
file because another process has locked a portion of the
file.). The BAK file size should be about 66 GB. This
backup works if the target is an uncompressed folder on
the same drive, and it did work the first time it was used
to the compressed drive. The system reports over 100 GB
free space on this drive.Have a look at the KB article:
INF: SQL Server Databases Not Supported on Compressed Volumes
# 231347
http://support.microsoft.com/?id=231347
--
Mike Epprecht, Microsoft SQL Server MVP
Epprecht Consulting (PTY) LTD
Johannesburg, South Africa
Mobile: +27-82-552-0268
IM: mike@.NOSPAMepprecht.net
Specialist SQL Server Solutions and Consulting
"Warren" <bauerwa@.wsdot.wa.gov> wrote in message
news:00ef01c3d947$a43136e0$a601280a@.phx.gbl...
> Backing up a large '78 GB' database to a compressed folder
> gives this error: BackupMedium::ReportIoError: write
> failure on backup device '*replaced file name here*.BAK'.
> Operating system error 33(The process cannot access the
> file because another process has locked a portion of the
> file.). The BAK file size should be about 66 GB. This
> backup works if the target is an uncompressed folder on
> the same drive, and it did work the first time it was used
> to the compressed drive. The system reports over 100 GB
> free space on this drive.sql