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connection failed sqlstate 08001

SQL Server Error 21 – The operating system returned error 21(The device is not ready)

Error Description:

The operating system returned error 21(The device is not ready) Databases not accessible after restart.  The following error is popped up every time restart Windows operating system is done :

Error 21 was returned by the operating system.(The device is not yet operational.) or
sql server drop database error 21 or
the operating system returned error 21(failed to retrieve text for this error. reason: 15105) or
sql server error: 21, encryption not supported on the client

you will see that running chkdsk /r on the disc and found no bad sectors.
DBCC CHECKDB and you will not found errors.

DBCC CHECKDB discovered 0 allocation and 0 consistency … Read the rest

SQL Server Error : 53, Severity: 0. An error has occurred while establishing

SQL Server Error : 53 Details

SQL Server Error: 53 Severity: 0 Event Logged or not: No Description: An error has occurred while establishing a connection to the server. When connecting to SQL Server, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 – Could not open a connection to SQL Server) (.Net SqlClient Data Provider). Severity 0 Description: Informational messages that return status information or report errors that are not severe. The Database Engine does not raise system errors with severities of 0 through 9.

Errors encountered

named pipes provider could not open a connection to sql server 53 microsoft sql server Read the rest