software recovery hard recovery exchange

what is software recovery hard recovery in exchange wrt. logs and database.
SM_exchangeAsked:
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AmitIT ArchitectCommented:
For hard recovery, you need to use Exchange aware backup product, like from Symantec, IBM vendors.
Will SzymkowskiSenior Solution ArchitectCommented:
The Terms are below...

Soft Recovery: this is whe a database unexpectedly dismount from Exchange (for whatever reason). The database and logs are still in tact at this point. When the database is re-mounted, Exchange will use the checkpoint file to replay the logs where the last successful log was committed to the database. If the checkpoint file is not present, then it will start with the oldest log available.

Hard Recovery: this is when a database has been completely recovered from an online backup. Exchange then replays the log files from a temporary directory you provide. With this type of restore checkpoint files are ignored and Restore.env is used to determine where the replay into.

For more info on this see the link below...
https://technet.microsoft.com/en-us/library/aa996168(v=exchg.65).aspx

Will.

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SM_exchangeAuthor Commented:
ok grt can you tell me in which scenarios soft/ hard recovery needs to run and what are the commands used for the same w.r.t eseutil
Will SzymkowskiSenior Solution ArchitectCommented:
For something like this, I would recommend using Exchange Recovery by Kernal Data Recovery.
http://www.nucleustechnologies.com/Exchange-Server-Data-Recovery.html

Will.
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