JSI Tip 5572. DO NOT store Microsoft Jet databases on compressed drives!

Microsoft Jet databases are managed by  ESENT or ESE. When you place a Jet database on a compressed drive, you may experience write-through delays, which can cause database corruption.

Jet database and related files include DIT files, logs, checkpoints and temporary databases:

Active Directory (NTDS)
File Replication service (FRS)
Windows Internet Name service (WINS)
Security Configuration Engine (SCE)
Certificate Server
Terminal Services Session folder
Terminal Services Licensing service
Catalog database
Help and Support Services
Directory Synchronization service (MSDSS)
Remote Storage (RSS)
Phone Book service
Single Instance Store (SIS) Groveler
Windows NT Backup/Restore
Exchange store
Microsoft Exchange folder (SRS and DXA)
Key Management service (KMS)
Instant Messaging
Content Indexing

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