What is Private Information Store?
One of the two databases in the information store on a computer running Microsoft Exchange Server. The private information store stores content for mailboxes homed on the server. It consists of a number of files stored in the \mdbdata directory on the Exchange server.
These files include the following:
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Priv.edb:
The actual database file
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Edbxxxx.log:
Transaction files used to track changes to the database
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Edb.chk:
A checkpoint file to keep track of transactions in edbxxxx.log that are uncommitted
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Res1.log and Res2.log:
Reserved log files used in low disk space conditions
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Temp.edb:
A temporary file used for storing transactions that are in progress