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1 White Paper SMB FILE MIGRATION TO EMC ISILON Guidance for optimal data migration of SMB workflows Abstract This paper provides technical information and recommendations to help you migrate data from a single SMB protocol workflow on another NAS vendor to an EMC Isilon storage cluster. It includes the best practices for planning, setting up, and executing the migration. September 2013

2 Copyright 2013 EMC Corporation. All Rights Reserved. EMC believes the information in this publication is accurate as of its publication date. The information is subject to change without notice. The information in this publication is provided as is. EMC Corporation makes no representations or warranties of any kind with respect to the information in this publication, and specifically disclaims implied warranties of merchantability or fitness for a particular purpose. Use, copying, and distribution of any EMC software described in this publication requires an applicable software license. For the most up-to-date listing of EMC product names, see EMC Corporation Trademarks on EMC.com. EMC 2, EMC, the EMC logo, Isilon, OneFS, SmartConnect, SmartLock, SmartPools, SmartQuotas, SnapshotIQ, and SyncIQ are registered trademarks or trademarks of EMC Corporation in the United States and other countries. All other trademarks used herein are the property of their respective owners. Part Number H12212 EMC Isilon data migration for SMB 2

Emcopy 64 Download

3 Table of contents Introduction.. 4 Assumptions.. 4 Audience.. 4 Prerequisites.. 5 The challenge of data migration.. 5 Risk management.. 5 Data integrity.. 6 Data availability.. 6 Project phases and methodology overview.. 6 Discovery and planning phase.. 6 Testing the migration methodology.. 8 Executing the migration.. 9 Post-migration Single protocol SMB data migration Challenges of single protocol SMB data migration) are for

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Robocopy
Developer(s)Microsoft
Stable release
Operating systemWindows NT 4 and later
TypeCommand
LicenseFreeware

Robocopy, or 'Robust File Copy', is a command-line directory and/or file replication command. Robocopy functionally replaces Xcopy, with more options. It has been available as part of the Windows Resource Kit starting with Windows NT 4.0, and was first introduced as a standard feature in Windows Vista and Windows Server 2008. The command is robocopy.

Features[edit]

Robocopy is noted for capabilities above and beyond the built-in Windows copy and xcopy commands, including the following:

  • Ability to tolerate network interruptions and resume copy(incomplete files are marked with a date stamp of 1970-01-01 and contain a recovery record so Robocopy knows where to continue from).
  • Ability to skip NTFS junction points which can cause copying failures because of infinite loops (/XJ)
  • Ability to copy file data and attributes correctly, and to preserve original timestamps, as well as NTFS ACLs, owner information, and audit information using the /COPYALL or /COPY:command line switches.
  • Beginning with the XP026 version, the ability to copy folder (or directory) date and timestamps (/DCOPY:T), even with the ability to update folder timestamps (copied from existing folders) on folders already created from previous versions (that did not copy the folder date and timestamps).
  • Ability to assert the Windows NT 'backup right' (/B) so an administrator may copy an entire directory, including files denied readability to the administrator.
  • Persistence by default, with a programmable number of automatic retries if a file cannot be opened.
  • A 'mirror' mode, which keeps trees in sync by optionally deleting files out of the destination that are no longer present in the source.
  • Ability to skip files that already appear in the destination folder with identical size and timestamp.
  • A continuously updated command-line progress indicator.
  • Ability to copy paths exceeding 259 characters — up to a theoretical limit of about 32,000 characters — without errors.[1]
  • Multithreaded copying. (Windows 7 and Windows Server 2008 R2)[2]
  • Return code[3] on program termination for batch file usage.

Common usage scenarios[edit]

Here are some examples of usage. If more than one option is specified, they must be separated by spaces.

  • Copy directory contents of Directory_A to Directory_B (including file data, attributes and timestamps), recursively with empty directories (/E):
Robocopy C:Directory_A C:Directory_B /E
  • Copy directory recursively (/E), copy all file information (/COPYALL, equivalent to /COPY:DATSOU, D=Data, A=Attributes, T=Timestamps, S=Security=NTFSACLs, O=Owner info, U=Auditing info), do not retry locked files (/R:0) (the number of retries on failed copies default value is 1 million), preserve original directories' Timestamps (/DCOPY:T - requires version XP026 or later):
Robocopy C:A C:B /COPYALL /E /R:0 /DCOPY:T
  • Mirror A to B, destroying any files in B that are not present in A (/MIR), copy files in resume mode (/Z) in case network connection is lost:
Robocopy C:A backupserverB /MIR /Z

If directory names have non-standard characters, such as spaces, they can be put in double quotes (as usual in command-line commands).

For the full reference, see the Microsoft TechNet Robocopy page.[4]

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Syntactic focus on copying folders[edit]

Robocopy syntax is markedly different from its predecessors (copy and xcopy), in that it accepts only folder names as its source and destination arguments. File names and wildcard characters (such as * and ?) are not valid as source or destination arguments. However, files may be selected or excluded using the optional 'file' filtering argument (which may include wildcards) along with various other options.[5]

For example, to copy the foo.txt file from the c:bar folder to c:baz, one could use the following syntax:

And to copy only PDF files from c:bar to c:baz, one could use the following syntax:

File specifications can refer only to the filenames relative to the folders already selected for copying. Fully qualified path names are not supported.

Output[edit]

By default Robocopy outputs to the screen (or optionally to a log file) all the directories it encounters (in alphabetical order). Each directory is preceded by the number of files in that directory that fulfill the criteria for being copied. If the directory does not yet exist in the target, it is marked 'New Dir'. But if the directory is empty and the /E option is not used, or it contains no files meeting the criteria, a new directory should not actually be created.

If the /NFL (no file names in log) option is not used, the files being copied will be listed after the name of the directory they are in.

At the end of the output is a table giving numbers of directories, files, and bytes. For each of these, the table gives the total number found in the source, the number 'copied' (but this includes directories marked 'New Dir' even if they are not copied), the number 'skipped' (because they already exist in the target), and the number of 'mismatches', 'FAILED', and 'extras'. 'Failed' can mean that there was an I/O error that prevented a file being copied, or that access was denied. There is also a row of time taken (in which the time spent on failed files seems to be in the wrong column).

Bandwidth throttling[edit]

Robocopy's 'inter-packet gap' (IPG) option allows some control over the network bandwidth used in a session. In theory, the following formula expresses the delay (D, in milliseconds) required to simulate a desired bandwidth (BD, in kilobits per second), over a network link with an available bandwidth of BA kbps:

D=BABDBA×BD×512×1000{displaystyle D={B_{A}-B_{D} over B_{A}times B_{D}}times 512times 1000}

In practice however, some experimentation is usually required to find a suitable delay, due to factors such as the nature and volume of other traffic on the network. The methodology employed by the IPG option may not offer the same level of control provided by some other bandwidth throttling technologies, such as BITS (which is used by Windows Update and BranchCache).

Limitations[edit]

  • Robocopy does not copy open files. Any process may open files for exclusive read access by withholding the FILE_SHARE_READ[6] flag during opening. Even Robocopy's Backup mode will not touch those files. (Backup mode instead runs Robocopy as a 'Backup Operator'. This allows Robocopy to override permissions settings, specifically, NTFS ACLs).[7][8] Normally Volume Shadow Copy Service is used for such situations, but Robocopy does not use it. Therefore, Robocopy is not useful for backing up live operating system volumes. However, one can use a separate utility, such as ShadowSpawn[9] (Free, Open Sourced, and MIT Licensed) or GSCopyPro[10] ($30 - $50) or DiskShadow.exe[11] (included with Windows Server 2008), to create a shadow copy of a given volume, which Robocopy can then be directed to back up.
  • Robocopy versions on systems older than Windows Vista do not mirror properly. They ignore changed security attributes of previously mirrored files.[12][13]
  • When specifying the /MT[:n] option to enable multithreaded copying, the /NP option to disable reporting of the progress percentage for files is ignored. By default the MT switch provides 8 threads. The n is the number of threads you specify if you do not want to use the default.[14]

GUI[edit]

Although Robocopy itself is a command-line tool, Microsoft TechNet provides a GUI front-end called Robocopy GUI. It was developed by Derk Benisch, a systems engineer with the MSN Search group at Microsoft, and required .NET Framework 2.0.[15] It includes a copy of Robocopy version XP026.

There are other non-Microsoft GUIs for Robocopy:

  • 'WinRoboCopy' revision 1.3.5953.40896 released on Apr 19, 2016.[16]
  • 'Easy RoboCopy' latest version 1.0.15 released in January 08, 2018.[17]
  • A program by SH-Soft, also called 'Robocopy GUI' v1.0.0.24 (October 8, 2005).[18]
  • Cinchoo EazyCopy v1.0.0.4

Ken Tamaru of Microsoft has also developed a copying program similar to Robocopy, called RichCopy, which is available on Microsoft TechNet. While it is not based on Robocopy, it offers similar features, and it does not require .NET Framework.[19]

Versions[edit]

Note: Several versions of Robocopy do not show the version number when executing robocopy /? on the command line. But their version is stored inside the executable itself and can be queried with PowerShell for example (gcm robocopy fl *) or inside Windows Explorer by right-clicking on Robocopy.exe, selecting Properties, then clicking on the Details tab.

Product versionFile versionYearOriginOther
1.54-1996Windows NT 4.0 Resource Kit© 1996
1.70-1997Windows NT Resource Kit
1.714.0.1.711997Windows NT Resource Kit
1.954.0.1.951999Windows 2000 Resource Kit
1.964.0.1.961999Windows 2000 Resource Kit© 1995-1997
XP0105.1.1.10102003Windows 2003 Resource Kit
XP0265.1.2600.262005Downloaded with Robocopy GUI v.3.1.2; /DCOPY:T option introduced
XP0275.1.10.10272008Bundled with Windows Vista, Server 2008, Windows 7, Server 2008r2© 1995-2004
6.16.1.76012009KB2639043© 2009
6.26.2.92002012Bundled with Windows 8© 2012
6.36.3.96002013Bundled with Windows 8.1© 2013
10.010.0.10240.163842015Bundled with Windows 10© 2015
10.0.1610.0.16299.152017Bundled with Windows 10 1709© 2017
10.0.1710.0.17763.12018Bundled with Windows 10 1809© 2018

See also[edit]

  • Command line
  • GUI

References[edit]

  1. ^Lewis, Dick (15 November 2004). 'Robocopy XP010 FAQ'. Windows IT Pro. Penton Media. p. 2. Archived from the original on 9 October 2012.
  2. ^'Multi-threaded robocopy for faster copies - Grant Holliday's Blog - Site Home - MSDN Blogs'. Blogs.msdn.com. 2009-10-23. Retrieved 2012-11-11.
  3. ^'Return codes that are used by the Robocopy utility in Windows Server 2008 or Windows Server 2008 R2'. Support.microsoft.com. 2012-02-17. Retrieved 2012-11-11.
  4. ^'Robocopy'. Technet.microsoft.com. Retrieved 2012-11-11.
  5. ^'Robocopy'. Microsoft Docs. Microsoft. 31 October 2016. Retrieved 14 January 2019.
  6. ^https://msdn.microsoft.com/en-us/library/aa363858.aspx'CreateFile function'. MSDN. FILE_SHARE_READ [..] Enables subsequent open operations on a file or device to request read access. Otherwise, other processes cannot open the file or device if they request read access.
  7. ^'Robocopy.exe - Robust File Copy Utility - Version XP010'(PDF). Backup mode copies [..] enable you to copy some files as a Backup Operator that you would not be able to copy as a normal user.
  8. ^'Default groups'. Microsoft TechNet. Backup Operators [..] Members of this group can back up and restore all files [..], regardless of their own individual permissions on those files.
  9. ^'ShadowSpawn'. Craig Andera. Retrieved 2015-07-14. ShadowSpawn.exe is an open source MIT licensed tool that creates and manages shadow copies.
  10. ^'GSCopyPro'. GuruSquad. Retrieved 2013-03-06. gscopypro.exe is a tool that works similar to robocopy but has the ability to copy open files.
  11. ^'Diskshadow'. Microsoft TechNet. Retrieved 2013-03-06. DiskShadow.exe is a tool that exposes the functionality offered by the Volume Shadow Copy Service (VSS).
  12. ^'Microsoft's Robocopy compromise'. ZDNet. 2008-08-04. Archived from the original on March 17, 2010. Retrieved 2012-11-11.
  13. ^'Ugly bug in Robocopy - ignoring security on file level - Martin Zugec blog'. Msmvps.com. 2008-03-03. Retrieved 2012-11-11.
  14. ^'Robocopy's /MT option disables /NP option'. Microsoft TechNet. 2009-12-13. Retrieved 2014-02-26.
  15. ^Joshua Hoffman (November 2006). 'Utility Spotlight Robocopy GUI'. TechNet Magazine. Microsoft Corporation and CMP Media, LLC. Retrieved 2008-07-17.
  16. ^'WinRoboCopy - UpWay2Late.com Software'. Upway2late.com. Retrieved 2012-11-11.
  17. ^'Easy RoboCopy'. TribbleSoft. Retrieved 2017-10-03.
  18. ^'SH-RoboCopy GUI'. SH-Soft. Retrieved 2012-11-23.
  19. ^Hoffman, Joshua (November 2006). 'Free Utility: RichCopy, an Advanced Alternative to RoboCopy'. TechNet Magazine. Microsoft Corporation and CMP Media, LLC. Retrieved 2008-07-17.

External links[edit]

Wikibooks has a book on the topic of: Guide to Windows Commands
  • Official sources
    • Robocopy download (Version XP010) as part of Windows Server 2003 Resource Kit Tools. Includes 35-page documentation 'robocopy.doc'.
    • Robocopy short documentation on Microsoft TechNet Library
    • Robocopy GUI download (Version 3.1.2.0) on Microsoft TechNet Magazine
  • Other
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