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are you hitting the NAS by UNC or by mapped drive?<br />
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Anything in the event viewer around the time the job is failing?
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are you hitting the NAS by UNC or by mapped drive?

Anything in the event viewer around the time the job is failing?

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I guess you network is the culprit 
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I am going to the NAS by UNC. &nbsp;In my event viewer I have this error message:<br />
18210 :<br />
BackupMedium::ReportIoErro<wbr />r: write failure on backup device '\\172.17.8.98\Share\SQL Backups\Critical\BAANDB2.b<wbr />ak'. Operating system error 64(The specified network name is no longer available.).
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I am going to the NAS by UNC.  In my event viewer I have this error message:
18210 :
BackupMedium::ReportIoError: write failure on backup device '\\172.17.8.98\Share\SQL Backups\Critical\BAANDB2.bak'. Operating system error 64(The specified network name is no longer available.).

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error message proves my doubts, your network loosing the connection with your NAS I guess.
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error message proves my doubts, your network loosing the connection with your NAS I guess.

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can you connect via folder name directly?<br />
<br />
\\172.17.8.98\c$\SQL Backups\Critical\BAANDB2.b<wbr />ak'
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can you connect via folder name directly?

\\172.17.8.98\c$\SQL Backups\Critical\BAANDB2.bak'

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Yes I can connect directly to that file, The job also runs fine every other day.
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Yes I can connect directly to that file, The job also runs fine every other day.

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Power Cycling the NAS after each backup has resolved the issue. Thanks!
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Power Cycling the NAS after each backup has resolved the issue. Thanks!

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I have a backup job that runs everynight through SQL server 2005 to a NAS device. &nbsp;The job fails every other night. &nbsp;When it fails I get the error that says the network name cannot be found. &nbsp;Also I can run the job manually at any time and it runs just fine.<br />
<br />
Thank you,
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I have a backup job that runs everynight through SQL server 2005 to a NAS device.  The job fails every other night.  When it fails I get the error that says the network name cannot be found.  Also I can run the job manually at any time and it runs just fine.

Thank you,

SQL Backup Issue

Microsoft SQL Server 2005 is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning. It includes support for managing XML data and allows a database server to be exposed over web services using Tabular Data Stream (TDS) packets encapsulated within SOAP (protocol) requests.