Last night I loaded a massive ASP.NET 2.0 project I did some years
ago in VB.NET. It used a SQL 2000 database for data storage, so I had to
attach the mdf file to get it to work. So I opened SQL Server
Management Studio, opened a connection to the server instance, and went
for the Attach database option.
When I selected the file, the following error came up:
“Store.mdf is Compressed But Does not Reside in a Read-only Database or Filegroup. The File Must be Decompressed.”
So here’s a quick tip for anyone who faces a similar issue. It took a
few seconds to understand the problem but then I remembered file
compression options. Opened my mdf file properties dialog box, and in
the advance tab the problem was revealed: the “compress content”
checkbox was checked.
After unchecking and saving changes, SQL Server accepted the attach with no problem whatsoever.
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