Explain Fast Backups

What is a Fast Backup?

When you backup files to the destination it is assumed that no other application, or person, will be changing the files in the destination. (This also means 'no more than one Fast Backup profile', either in the same installation of SyncBackSE/Pro or another installation). For example, if you back up your files to another drive, and you are not going to be editing or changing those backup files (except using SyncBackSE/Pro to replace and delete them as appropriate, using a single Fast Backup profile on a single PC). Because of this, SyncBackSE/Pro is able to remember which files, and directories, are on the destination without needing to scan it every time to find out.

Using Fast Backup with slow destinations, e.g. FTP and networked drives, can considerably decrease the overall* backup time and load on your network.

The help file contains extensive information on Fast Backup.

How does Fast Backup work?

First, you need to enable the Fast Backup option for the profile. When the profile is next run, SyncBackSE/Pro will remember (by creating a database) which files and directories it copied to (or deleted from) the destination directory. This means the first run of a profile, after Fast Backup is enabled, will take the same amount of time as without Fast Backup enabled. However, for the second and subsequent runs of the profile (unless/until a Rescan is forced), it will not need to scan the destination directory because it remembers what it did the last time the profile was run. This means the scan time is substantially lower (at least twice as fast, often far more) especially if the destination is on a slow device, e.g. networked drive, FTP server, etc.

SyncBackSE/Pro V5 introduced Fast Backups that use the archive attribute instead of storing details of what the previous state of the files was. Whenever a file is created or modified, the archive attribute is automatically switched on (set) by Windows. With SyncBackSE/Pro you can create a Fast Backup profile that only copies files that have the archive attribute on/set. Once a file has been copied, its archive attribute is switched off (unset) by that profile. Any subsequent modification to the file means Windows will set the attribute again, and on the next run, SyncBackSE/Pro will detect that, re-copy the changed file, unset its attribute again, and so on. Special considerations apply using this mode - see the Help on the Fast Backup settings page for details. Bear in mind also that there is only one archive bit (flag) per file, so only one process can reference / change it, or conflicts will occur. That is, you can only have one process that is relying on this to detect 'copy required' state (and re-setting this flag after it has done so). If you have two or more processes, each will be resetting the archive bit that the other process(es) rely on to detect files that need copying (thus, any subsequent process will not see such files as 'candidates'). Each profile is a 'process' so you must only have one profile (and no other process from any other software) relying on and manipulating the archive bit (flag) of a given file.  You can have multiple such bit-based profiles provided they do not reference the same files, but only one bit-based process of any kind that references any given file.

If you are doing a backup to an FTP server (and nothing and nobody else will be changing them independently on that side), it is advisable to use Fast Backup as not only will it reduce backup time but will also avoid problems with FTP servers that report the wrong file date & times, cannot set file date & times, etc.


* Note: Fast Backup has no effect on copying speed, but can radically reduce the scanning time, and it is often the case that the scanning time is the majority of the operation, if not many files were changed or are new. For example, a Fast Backup profile can potentially avoid scanning 10,000 files on an remote FTP Destination (very slowly) to find out only 10 files need copying there. It can thus radically reduce the overall time taken for the entire process, but it has no effect on the actual copy speed.

Technical Articles

  1. Information to include for technical support
  2. Bug Reporting
  3. Creating a debug information file
  4. SyncBack Touch Guide
  5. Why SyncBack Touch Does Not Work With iOS
  6. The Syncback Management System Guide
  7. Safe Computing
  8. Your Software Broke My Hardware
  9. Known bugs and problems with SyncBack
  10. Transferring profiles from one computer to another
  11. The Format of the Text Log File
  12. Running SyncBack from an external storage device (No Install Version)
  13. Receiving the log email on profile run
  14. Access Denied Error Message
  15. Access Denied for folder System Volume
  16. The Differences Between File Systems
  17. Automatic backup and sync when files change
  18. Windows Task Scheduler Fails
  19. Assigning a drive letter to external USB
  20. The Windows Task Scheduler
  21. How to see the list of scheduled jobs
  22. Starting and Stopping the Windows Scheduler
  23. How to set up a different schedule at the weekends to that of a weekday
  24. Auto-shut down after running a schedule
  25. Variables
  26. Cannot see hidden folders
  27. How to set the error level for a batch file
  28. Scheduling Other Jobs with SyncBack
  29. Creating a network share to backup or synchronize
  30. HTML Help File Problems
  31. How to troubleshoot hibernation and standby issues in Windows
  32. The Difference Between FTPS and SFTP
  33. Programs or processes that are being used
  34. Example filters for SyncBack
  35. How to Quit a Frozen Program
  36. Cannot copy files or folders with full-stop
  37. Delayed Write Failed error message from Windows
  38. The difference between Active and Passive for FTP
  39. Files with a leading dot or period are hidden
  40. Mapped drive connections are lost
  41. Slow performance with a firewire device on Windows
  42. eml files have wrong last modification date time
  43. Anti-virus flags software as Suspicious
  44. Failed to scan files- Cloud error 403 Forbidden
  45. Cannot suppress Differences in Restore
  46. Logon failure user not granted logon
  47. External exception E06D7363
  48. Cannot copy file - 87 - The parameter is incorrect
  49. Common FTP errors and Socket Error messages
  50. A program needs your permission
  51. Backing up Microsoft Outlook PST files
  52. 0x80070005 - Access is denied error
  53. Where profiles settings are stored
  54. The process cannot access the file
  55. Correct drive letter when unknown
  56. A scheduled task could not be created Access violation at address 005D27DB
  57. SyncBack and Amazon S3
  58. 451 Failure writing to local file
  59. FTP - FTPS and SFTP servers
  60. The maximum path - filename length
  61. Using the files modification date - time
  62. Emailing logs to a Google gmail account
  63. File and folder permissions are not copied
  64. WebDrive and SyncBack
  65. Why scheduling is better than running as a service
  66. Running scheduled tasks with blank Windows login
  67. Access violation at address XXXXXXXX in module vsxp-dll
  68. WebDav and SyncBack
  69. Application fails incorrect configuration
  70. Background Scheduling and Running
  71. Cannot see networked drives
  72. Unable to send email - Error with connecting server
  73. The drive X does not exist
  74. Invalid self-extractor configuration
  75. FTP settings that improve speed
  76. 64 - The specified network not available
  77. Deploying in a Microsoft Active Directory
  78. Install SyncBack with no prompts
  79. Situations under which a profile can be run
  80. Side effects using Fast Backups
  81. Logon failure unknown user name 0x8007052E
  82. Transaction support did not start or was shut down
  83. Warning in log file - files cannot be copied
  84. Backing up to multiple folders
  85. Maximum file sizes
  86. Compression error - temp file - 506
  87. VSS_E_PROVIDER_VETO error on volume
  88. Explain Fast Backups
  89. This security ID may not be assigned
  90. Compression error: Cannot open zip file - 503
  91. Desktop Search programs and open-locked files
  92. VSS-E-MAXIMUM-NUMBER-OF-SNAPSHOTS-REACHED
  93. Making FTP the source and backup from FTP
  94. STOP 0x00000019 Bad_Pool_Header
  95. Safe copy failed to rename temp file
  96. Compression error - Cannot move temporary file
  97. Junction Points in Vista
  98. The $SBV$ folder - directory
  99. Failed to access the shadow volume
  100. Backup TrueCrypt containers
  101. Timed-out waiting for access to VSS DLL
  102. Cannot create task Profile Name - Access denied
  103. Most common reasons for files being skipped
  104. Creating versions when not using ZIP
  105. Cannot create task Profile Name - Logon failure
  106. How to Restore Profiles
  107. Scan Failure using network drives
  108. Verifying IP address with MAC address
  109. Closing or starting a program on a remote computer
  110. DeleteFile failed - code 5 Access is denied
  111. Maximum file size with FTP
  112. 121 - The semaphore timeout period has expired
  113. Automatically running a profile on login
  114. Problems copying files to an external USB
  115. U3 and SyncBack
  116. SyncBack supported storage devices
  117. Cannot copy file - 1314
  118. The profile file (filename) does not contain a registry setting file
  119. Verify files are copied correctly
  120. Restore one or a selection of my files
  121. Cannot copy specified file 2
  122. Access violation at address 03A1352B
  123. Reducing the CPU usage when running a profile
  124. Explaining A Collision
  125. FTP Support of MDTM - MFMT SITE UTIME
  126. SyncBackSE-Pro scans with Fast Backups
  127. Filtered files and folders not deleted
  128. Backup or sync my files using Gmail - Yahoo
  129. Error - profile with that name already exists
  130. Error - the file is being used by another process
  131. No account info in the Task Scheduler
  132. Empty folders-directories created in source
  133. Network failure error
  134. SyncBack will not run with Scheduler
  135. XceedZip-dll is not registered or missing
  136. Network Attached Storage - NAS devices
  137. Updating software by 2BrightSparks
  138. Common problems using SAMBA with SyncBack
  139. Recursive junction-mount point non-critical error
  140. SyncBack in task bar but not on screen
  141. The last modification date and time are wrong
  142. VSS_E_WRITER_INFRASTRUCTURE error on volume
  143. Junction Points - Reparse Points
  144. Could not load SSL library error message
  145. CreateProcess Code 14001 error
  146. Compression error- Cannot write to zip file - 507
  147. Corrupted filenames in the Zip file
  148. Translating the SyncBack user interface
  149. Cannot get date and time of file
  150. Backing up to CD or DVD
  151. Files and folders not selected are included
  152. Sync profile copies deleted files
  153. I can now see the profiles of other users
  154. Moving where profile settings are stored
  155. Cannot create - move - or copy file
  156. The license for FTP was not accepted
  157. The file could not be checked for changes
  158. Upgrading from SyncBackSE to SyncBackPro
  159. Imported group profile does not appear
  160. Not enough server storage available
  161. Scan failed Connection closed
  162. Using Fast Backups on all profile types
  163. Error 0x80090016 or 0x8009000f
  164. Expected another server reply - No such file
  165. Backup Windows Encrypting File System certificates
  166. Read-only NTFS encrypted files cannot be copied
  167. Creating a shortcut to run SyncBack
  168. Backing up encrypted files to an FTP server
  169. Viewing a profile log
  170. Compression error prevents file process
  171. Backup is smaller than original
  172. Memory RAM usage comparison
  173. Comparison of compression methods and levels
  174. How to encrypt files without using compression
  175. System32 copied files are unexpected
  176. Installing SyncBack-Lite-SE-Pro with different version
  177. Cannot create a file when file already exists
  178. Administrator Privileges and SyncBack
  179. The first run of a profile takes a long time
  180. Error 0x00002745 when testing email settings
  181. Accessing BitLocker To Go encrypted drives
  182. Non-Allocatable Space on CD or DVD
  183. CD-DVD burners are not installed
  184. I do not want SyncBack to export profiles
  185. Backup-synchronize between two FTP servers
  186. The application failed to initialize properly
  187. Where SyncBackPro stores its database files
  188. GetFolder SyncBack-username exception
  189. Source as FTP Server
  190. 23 Data error - cyclic redundancy check
  191. Notify me of missed tasks (schedules)
  192. Backup-Sync longer than using FTP client
  193. Profile only copies new and changed files
  194. FTP server last modification date time changes
  195. Network resource or device unavailable
  196. Copying files over the network causes problems
  197. Simulated Runs
  198. SyncBack is stuck in a loop on FTP
  199. MP3 files copied even though they are not changed
  200. The maximum number of files for a profile
  201. Windows error system call level
  202. Backup - synchronize between ZIP and FTP
  203. Short and long form filenames causes problems
  204. Using SyncBack with Maxtor OneTouch button
  205. HTML log files do not open with default browser
  206. Preserving archive attribute on copied files
  207. SyncBack login for scheduled tasks
  208. XceedZip-dll cannot be deleted on installation
  209. Tape Backup
  210. No sub-folders are found in a DFS share
  211. SyncBack does not start minimized on login
  212. Child folders and directories are not shown
  213. How to backup from a HTTP web server
  214. Setting default profiles
  215. The SyncBack icon is not shown
  216. Creating scripts and plugins for SyncBackPro
  217. Rescan fails to copy based on archive attribute
  218. Unexpected changes to Microsoft Money files
  219. Password storage
  220. Profiles begin to run slowly
  221. Set SyncBack to automatically start with Windows
  222. I cannot change the order of the profiles
  223. Solutions to problems with backup to CD-DVD
  224. Program attempts to connect with Firewall
  225. CreateProcess failed - code 2 - error
  226. BZip2 and other compression methods
  227. FTP shortcut files are missing with Serv-U
  228. Desktop icons disappear when running a profile
  229. Microsoft Application Verifier
  230. Profiles on login run slowly
  231. Changing my compression password
  232. File icons not displaying or are corrupted
  233. Compressed file contains different file
  234. Defining the source to be compressed ZIP file
  235. Differences window does not show all files
  236. Cannot display the SyncBack help file
  237. Combine files split across multiple CD-DVD
  238. How to create an SFTP - SSH - Key
  239. Deleting profile deletes it from all groups
  240. Polite people say HELO first
  241. Incorrectly reports no files on FTP server
  242. FTP servers may restrict number of files
  243. Windows Event Log has entry after uninstalling
  244. Backing up to a Zip file on an FTP server
  245. File size exceeds limit and cannot be saved
  246. Network freeze when running backups
  247. Sandboxie and SyncBack
  248. Remote network is not reachable by the transport
  249. Email cannot be deleted it is a re-scan
  250. HHCTRL error entries in Windows Event Log
  251. Some of my profile names are shown in blue
  252. SyncBackLite-SE-Pro icons show as generic icons
  253. FTP is not supported on Windows 2000
  254. Sending a profile result to Twitter
  255. SyncBackPro CD-DVD burning and Windows 8 (or newer)
  256. Thread Error Invalid handle- 6
  257. Removal of split from S3 Cloud functionality
  258. Ordinal 3253 not located in dynamic link library
  259. Exception in RunTheProfile - the file exists
  260. Access hidden volumes Volume GUID
  261. Devices which mount using MTP-PTP
  262. Request time and current time difference too large
  263. Setup has detected SyncBack currently running
  264. HashOnClick Hash Values
  265. File conditions in UndeleteOnClick
  266. HashOnClick - Hash Values and File Contents
  267. Using EncryptOnClick on a USB key
  268. DeleteOnClick is slow when wiping disk space
  269. Being an Administrator when using FindOnClick
  270. Searching multiple drives with FindOnClick
  271. Streams zero when using FindOnClick
  272. Networth paths and FindOnClick
  273. MD5 Hash Value
  274. The FindOnClick file icons are missing
  275. Creating search shortcuts in FindOnClick
  276. FindOnClick Filenames are Green
  277. FindOnClick Filenames are Blue
  278. Explaining Streams
  279. Listing empty files in FindOnClick
  280. FindOnClick and Storage Devices
  281. Types of files searchable by FindOnClick
  282. Running FindOnClick from a USB
  283. UndeleteOnClick produces junk in file
  284. UndeleteOnClick Does not work
  285. Storage devices and UndeleteOnClick
  286. File types processed by UndeleteOnClick
  287. Strange first letter file and folder names
  288. Undeleting defragmented drives
  289. Undeleting Formatted Drives
  290. Undeleting overwritten files
  291. UndeleteOnClick - NTFS vs. a FAT file system
  292. Alternative options to UndeleteOnClick
  293. Green filenames in UndeleteOnClick
  294. Red filenames in UndeleteOnClick
  295. Blue filenames and OnClickUtilities
  296. Deleted file not shown in UndeleteOnClick
  297. Not listing empty files in FIndOnClick
  298. OnClickUtilities explain All Deleted Files folder
  299. Searching for files using UndeleteOnClick
  300. No file after emptying recycle bin
  301. Undeleting files in the Recycle Bin
  302. Guaranteeing Undeleting Files
  303. Administrator use of UndeleteOnClick
  304. Installing UndeleteOnClick
  305. Administrator rights when undeleting files
  306. Undeleting Files
  307. Evaluation Full version of UndeleteOnClick
  308. UndeleteOnClick System Requirements
  309. Explaining Patch Files
  310. Entering the OnClick Utilities serial number
  311. File types securely deleted by DeleteOnClick
  312. Command line and EncryptOnClick
  313. Matching Hash Values in OnClick Utilities
  314. EncryptOnClick Windows context menu
  315. Displaying lowercase letters in HashOnClick
  316. Disabling the Indexing Service in Windows
  317. Quickly Wiping Free Disk Space
  318. Securely Wipe Free Disk Space
  319. Stopping Differences Window Prompt
  320. Listing Empty Files in FindOnClick
  321. Exception in RunTheProfile - 112
  322. Listing empty files in UndeleteOnClick
  323. Restart and shutdown problems
  324. Knowing a file has been modified via FTP
  325. SFTP and SyncBack
  326. FTP servers SyncBackSE-Pro have been tested on
  327. Compression error Cannot read from zip file
  328. All of my network connections are used
  329. Hidden settings change how FTP is used
  330. Network connections on login before program runs
  331. RegSvr32 failed with exit code 0x3
  332. The xxx file folder has been ignored
  333. Profiles intermittently dropped from Groups
  334. Amazon S3 Access and Secret Keys
  335. Windows 8.1 and OneDrive
  336. Amazon S3 - privileges required
  337. Issues with OnChange & OnInsert
  338. Scheduler constraints error 0x80041324
  339. Window 8 (or newer) Cancels Shutdown/Logoff during Profile run
  340. Error 1251 from networked devices
  341. Display problems with high DPI screen
  342. Exclude Time Machine files during backup
  343. Gmail 2-step Verification - using with SyncBackPro/SE/Lite/Free
  344. Source and Destination are reversed
  345. How to change MIME Content-type for files uploaded to Cloud
  346. Creating a list for extensions to exclude in temp file-names during Safe Copy
  347. 550 The supplied message is incomplete. The signature was not verified.
  348. Limitations to the REST API of Cloud storage services
  349. Cloud Service Status
  350. 550 Data channel timed out
  351. Estimated Time Left indicator during profile runs are inaccurate
  352. "Failed to scan files: Out of memory" errors during Cloud-based backup
  353. Email a Support Ticket option opens other applications instead of default email program
  354. Permission denied writing to SD on Android
  355. Backup your Google Photos
  356. Backing up POP3 IMAP4 and Exchange email messages
  357. Migrate your Backup data to a new system
  358. TLS 1.1 and TLS 1.2 with FTP
  359. Character Encoding during FTP transfer
  360. 421 Too many connections from this IP
  361. Multiple Connection to a server or shared resource
  362. Socket Error # 10106
  363. Configuring Avast anti-virus software to ignore SyncBack
  364. FTP Commands in SyncBack
  365. Use of freeFTPd is not recommended
  366. SyncBack Touch as an alternative to FTP
  367. Creating a SyncBack Touch profile
  368. RollBack/Restore from Version files
  369. Comodo Internet Security (V8) and file timestamps
  370. How to switch off automatic upgrade checks in SyncBack
  371. 550 Sender verify failed
  372. The requested operation requires elevation (0x800702E4) - Windows 10 Scheduler Issue
  373. "The system cannot find the specified file" and "The system cannot find the specified path" errors when creating schedule
  374. Cloud error 400: HTTP/1.1 400 The value for one of the HTTP headers is not in the correct format.
  375. Scan failed on [/] with error code 13
  376. The shutdown and reboot command line parameters do not work
  377. Using SBMS as the License Manager for SyncBack Touch
  378. Folder Flattening
  379. Ports used in SyncBack
  380. Access Violation error during SyncBack V7/8 uninstallation
  381. Switching from Dropbox V1 to Dropbox V2 API
  382. Sticky Password Manager freezes SyncBack application
  383. Switching/migrating to 64-bit SyncBackPro/SE
  384. Differences between 32-bit and 64-bit versions of SyncBack
  385. The file cannot be accessed by the system (1920) – Windows 10 April 2018 update
  386. SyncBackPro V8.4.5.0 (or older) and V7.12.10.0 (or older) stops working with Box cloud (TLS 1.1 or newer required)
  387. Windows 10 and OneDrive Files On-Demand
  388. Web site status
  389. Scan failed (19): The media is write protected

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