Event ID - 1000

Event Id1000
DescriptionAttempting to start the Microsoft Exchange Information Store Storage Group Name>\<Store Name.
Event InformationAccording to Microsoft:
Exchange 2003 uses mailbox stores and public folder stores, and these are referred to as databases. In Exchange 2003, you can configure up to five stores (either mailbox stores or public folder stores) in up to four storage groups, and you can have a maximum of twenty databases for each Exchange 2003 computer.
Each group of databases in a storage group shares the same set of transactional tracking log files. However, each database in a storage group can have its database files in a different location than the transactional tracking log files location. Functions like circular logging are enabled at a storage group level.
Consider the following recommendations as you decide where to locate your transactional tracking log files and your mailbox store files:
1. Microsoft recommends that you put both the transactional tracking log files and the database files on fault-tolerant partitions such as RAID1, RAID5, or RAID0+1.
2. Microsoft recommends that you put the transactional tracking log files and the database files on separate partitions, and that you arrange them so that a failure of a single disk does not affect both the log files and the database files.
3. If you are working in a large environment, Microsoft recommends that each database has a separate fault-tolerant volume. Use this configuration if you have a special mailbox database (such as for an important person) that you may have to restore more rapidly.
4. To carry out in-place restores, the database volumes must have free space equal to 110 percent of the size of the database.
5. Remember that the deleted item retention time means that the deleted items are not removed from the database until the retention time has elapsed and the online maintenance has completed. Disk space that is reclaimed by deleted item retention is not returned to the operating system but is converted to white space in the database.
Reference LinksHOW TO: Add New Mailbox Stores in Exchange Server 2003

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