The Next Generation Data Recovery Clone/Image Tool

Transcription

1 The Next Generation Data Recovery Clone/Image Tool CPR Tools, Inc Hendry St Ft. Myers, FL Page 1 of 54

2 Table of Contents Interfaces...4 Mimic Home Screen...5 Clone...6 Configure Settings...10 Error Handling...10 Image...13 File Copy...19 File Copy Command Options...23 Fast Clone...27 What Is Fast Clone?...27 Fast Clone Command Options...31 Use Case for Fast Clone...33 Erase...34 Resume...40 Utilities...42 Script...43 Launch...44 Create...44 Edit...46 Delete...46 Settings...47 Error Handling...48 Light (1 Pass)...48 Moderate (2 Pass)...48 Heavy (3 Pass)...48 Mimic control icons...48 Power...49 Manage Users...49 Create A User...50 Edit a User...51 Home...53 Help...53 Device Power...53 CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 2 of 54

3 Congratulations! From our lab to yours, CPR Tools, Inc. is proud to introduce the latest innovation in data recovery technology. Designed for the lab and out in the field, use Mimic when size matters. Mimic was built with you in mind. This product features the traditional 5-inch touchscreen that you re used to, with USB 3.0 and SATA ports for faster reads and writes. You ll be in full control of your recoveries with the option to start, pause, and resume your work at any time with the touch of a button. Mimic s recovery journals automate processes for logging operator information, source and destination data, and recovery statistics. Recovering similar information? Create and run your own scripts on Mimic to make saving all of your music files, documents and more a breeze! Make data recovery easy with Mimic. Built by and for information technology experts, this tool is sure to enhance your recovery technique. Clone data quickly from a source device or partition to a destination device or partition. File Copy specified files from a source file system directly to a destination drive folder. Create an image of a source device in RAW, RAW compressed,.e01 and.ex01 formats. Mimic s small size makes it portable enough to suit your needs. We didn t forget security, either. It comes equipped with a passcode locking feature to keep information private while operating a recovery Mimic supports FAT, FAT16, FAT32, exfat, NTFS, EXT2, EXT3, EXT4, HFS and HFS Plus file systems. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 3 of 54

4 Interfaces One of Mimic s strengths is the number of supported interfaces. Source media will be attached on the left side of the unit. Mimic supports esata and USB 3.0 Sources. Mimic has three (3) destination interfaces on the right side of the unit: one USB 3.0 and two esata destinations are provided. The USB 3.0 and esata ports provide the user with the opportunity to use any media for which there is a compatible enclosure. This opens the door to literally any type of media to be used as Mimic source or destination. The JumpStart port is on the rear of the device. This feature will be available in a future release. Watch for this remarkable technology which will allow the user to boot a system using Mimic and enable a data recovery effort without the need to remove the source media from its host system. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 4 of 54

5 Mimic Home Screen Mimic s home screen is analogous to a top level menu. Data recovery / eradication options include: Clone Image File Copy Fast Clone Erase Resume Automation and Configuration options include: Utilities Load Script Settings At the bottom of the screen, Mimic control icons include: Power Switch/Lock User Home Help Device Power Control Each of these will be discussed in detail. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 5 of 54

6 Clone Select the Clone icon to begin a clone of a source drive onto a destination drive. The Create Case screen will be displayed. Begin by entering a name In the Case name field. Once this is done, the Forward arrow (right facing) appears. Click the forward arrow to proceed. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 6 of 54

7 If the case name entered matches a previously used case name, a warning appears. Click Yes to overwrite the existing case name; click No to select a different name. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 7 of 54

8 Once a name has been selected, the Select a Source screen appears. Select USB or SATA sources by clicking the appropriate icon. If your media is attached but not listed, click the Rescan icon to instruct Mimic to re-scan the source ports for your source media. Once the source media has been selected, proceed to to the Select Clone Destination(s) screen by clicking the forward arrow. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 8 of 54

9 Click the forward arrow to proceed to the Configure Settings screen. CPR Tools, Inc Hendry St Ft. Myers, FL Page 9 of 54

10 Configure Settings The Configure Settings screen displays current settings which will affect how the current operation will be executed. User s may adjust these settings to suit the current job. Editable settings include: Power On Timeout in seconds (Max/Min) Block Count in sectors (Max/Min) Command Timeout in seconds (Max/Min) Number of Passes (Max/Min) Error Handling Light (1 Pass) Moderate (2 Pass) Heavy (3 Pass) Manage Users Error Handling The available selections for Error Handling are defined below. Light (1 Pass) This is the default and is will use the following settings when selected: Hard reset on error. Pass 1 Jumper1 is set to the block size. Moderate (2 Pass) Hard reset on error. Pass 1: Jumper is set to the block size. Pass 2: Jumper is set to one half of the block size. Heavy (3 Pass) Hard reset on error. Pass 1: Jumper is set to the block size. Pass 2: Jumper is set to one half of the block size. Pass 3: Attacker (no jump). Block size is one sector. 1 A Jumper is a method which instructs Mimic to temporarily skip a certain number of sectors upon encountering an error. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 10 of 54

11 Selecting the Turn Drive off After Command box will instruct Mimic to power down drives (if possible) when the operation completes. Selecting the Stop Command On Error box will instruct Mimic to halt the operation if an error is encountered. Once the displayed settings are suitable for the current operation, click the forward arrow to proceed to the Review Selections screen. Carefully review the displayed settings. To make changes, click the left facing arrow (back) to return to the Configure Settings screen. If the displayed settings correctly indicate your source and destination drives, current operation and operational settings, click forward to begin the Clone. CPR Tools, Inc Hendry St Ft. Myers, FL Page 11 of 54

12 The Clone Running screen displays progress of the current operation. When the current operation completes, The Operation Complete screen is displayed. CPR Tools, Inc Hendry St Ft. Myers, FL Page 12 of 54

13 Image Select the Image icon to begin construction of an image of a source drive onto a destination drive. The Create Case screen will be displayed. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 13 of 54

14 Enter a Job name and click the forward arrow to begin. As with Clone, if the named case already exists, the user will be prompted to rename the current case or overwrite the previous case with the same name. Select USB or SATA sources by clicking the appropriate icon. If your media is attached but not listed, click the Rescan icon to instruct Mimic to re-scan the source ports for your media. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 14 of 54

15 Once the source media has been selected, proceed to to the Select Image Destination(s) screen by clicking the forward arrow. Saving an image requires an existing file system. Select a destination partition of an available source.2 2 Mimic can be used to format a destination drive. Click Utilities from the home screen to view available utilities, including Format. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 15 of 54

16 CPR Tools, Inc Hendry St Ft. Myers, FL Page 16 of 54

17 Click the forward arrow to proceed to the Configure Settings screen. The Configure Settings screen displays current settings which will affect how the current operation will be executed. User s may adjust these settings to suit the current job. Editable settings include: Power On Timeout in seconds (Max/Min) Block Count in sectors (Max/Min) Command Timeout in seconds (Max/Min) Number of Passes (Max/Min) Selecting the Turn Drive off After Command box will instruct Mimic to power down drives (if possible) when the operation completes. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 17 of 54

18 Selecting the Stop Command On Error box will instruct Mimic to halt the operation if an error is encountered. Once the displayed settings are suitable for the current operation, click the forward arrow to proceed to the Review Selections screen. Carefully review the displayed settings. To make changes, click the left facing arrow (back) to return to the Configure Settings screen. If the displayed settings correctly indicate your source and destination drives, current operation and operational settings, click forward to begin the imaging process. CPR Tools, Inc Hendry St Ft. Myers, FL Page 18 of 54

19 The Image Running screen displays progress of the current operation. When the current operation completes, The Operation Complete screen is displayed. CPR Tools, Inc Hendry St Ft. Myers, FL Page 19 of 54

20 File Copy Select the File Copy icon to begin the file copy process. The Create Case screen will be displayed. CPR Tools, Inc Hendry St Ft. Myers, FL Page 20 of 54

21 Enter a Case Name for this file copy process, then click the forward arrow to proceed. The Select File Copy Source screen will be displayed. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 21 of 54

22 Select USB or SATA sources by clicking the appropriate icon. If your media is attached but not listed, click the Rescan icon to instruct Mimic to re-scan the source ports for your source media. Once the source partition has been selected, proceed to to the Select File Copy Destination(s) screen by clicking the forward arrow. CPR Tools, Inc Hendry St Ft. Myers, FL Page 22 of 54

23 File Copy requires an existing file system. Select a destination partition of an available source.3 Click the forward arrow to proceed to the Command Options screen. 3 Mimic can be used to format a destination drive. Click Utilities from the home screen to view available utilities, including Format. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 23 of 54

24 The Command Options screen presents the user with the ability to select precisely what will be copied during the File Copy operation. File Copy Command Options All Files Selecting this option will instruct Mimic to copy all files from the source to the destination. User Files Selecting this option will instruct Mimic to retrieve all files created by the user, provided they are in default locations. (i.e. in Windows this includes includes default Documents, Music and Pictures folders). Documents Select this option to recover all Documents and Business files. File extensions include.doc*,.xls*,.pdf,.txt,.ppt*,.qbw, and more. Pictures Select this option to recover all picture files. File extensions include:.jpg,.bmp,.ai,.png,.gif,.psd, and more. Audio/Video Select this option to recover all audio/video files. File extensions include:.mp3,.wmv,.avi,.mpg,.mp4,.mov and more. Specific Files Selecting this option will cause Mimic to allow the user to list specific files to be recovered. Mimic accepts a file names separated by commas. Specific Folders Selecting this option will cause Mimic to allow the user to list specific folders to be recovered. Mimic accepts folder names separated by commas. Specific File Types Selecting this option will cause Mimic to allow the user to list specific file types/extensions to be recovered. Mimic accepts file extension names separated by commas. Deleted Files Select this option to recover files marked as deleted by the source drive s file system. NOTE: When any option other than All Files is selected, options may be selected in conjunction with each other. Ex: Specific Files + Pictures will cause Mimic to retrieve all picture files and any files entered by the user in the specific files list. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 24 of 54

25 Once the selection criteria has been set, click the forward arrow to proceed to the Configure Settings screen. The Configure Settings screen displays current settings which will affect how the current operation will be executed. User s may adjust these settings to suit the current job. Editable settings include: Power On Timeout in seconds (Max/Min) Block Count in sectors (Max/Min) Command Timeout in seconds (Max/Min) Number of Passes (Max/Min) Selecting the Turn Drive off After Command box will instruct Mimic to power down drives (if possible) when the operation completes. Selecting the Stop Command On Error box will instruct Mimic to halt the operation if an error is encountered. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 25 of 54

26 Once the displayed settings are suitable for the current operation, click the forward arrow to proceed to the Review Selections screen. Carefully review the displayed settings. To make changes, click the left facing arrow (back) to return to the Configure Settings screen. If the displayed settings correctly indicate your source and destination drives, current operation and operational settings, click forward to begin the file copy process. The File Copy Running screen displays progress of the current operation. CPR Tools, Inc Hendry St Ft. Myers, FL Page 26 of 54

27 When the current operation completes, The Operation Complete screen is displayed. CPR Tools, Inc Hendry St Ft. Myers, FL Page 27 of 54

28 Fast Clone NOTE: Mimic s Fast Clone function should be considered an advanced feature and is suitable for use by users who have advanced knowledge of file systems. What Is Fast Clone? Fast Clone copies the MFT and files which meet the user s selection criteria. Fast Clone is intended for advanced users and will NOT result in a mountable image of a source drive, however Mimic created Fast Clone media may be used as a source for a Mimic File Copy process. Begin by selecting Fast Clone from the Mimic Home screen: CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 28 of 54

29 The Create Case screen is shown. Enter a Case Name and click the forward arrow. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 29 of 54

30 The Select Fast Clone Source screen appears. Select a source port and partition, then click the forward arrow to proceed. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 30 of 54

31 Select a Destination Port and partition, then click the forward arrow. The Command Options screen appears. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 31 of 54

32 Fast Clone Command Options All Files Selecting this option will instruct Mimic to include all files from the source to the destination. User Files Selecting this option will instruct Mimic to include all files created by the user, provided they are in default locations. (i.e. in Windows this includes includes default Documents, Music and Pictures folders). Documents Select this option to include all Documents and Business files. File extensions include.doc*,.xls*,.pdf,.txt,.ppt*,.qbw, and more. Pictures Select this option to include all picture files. File extensions include:.jpg,.bmp,.ai,.png,.gif,.psd, and more. Audio/Video Select this option to include all audio/video files. File extensions include:.mp3,.wmv,.avi,.mpg,.mp4,.mov and more. Specific Files Selecting this option will cause Mimic to allow the user to list specific files to be included. Mimic accepts a file names separated by commas. Specific Folders Selecting this option will cause Mimic to allow the user to list specific folders to be recovered. Mimic accepts folder names separated by commas. Specific File Types Selecting this option will cause Mimic to allow the user to list specific file types/extensions to be included. Mimic accepts file extension names separated by commas. Deleted Files Select this option to include files marked as deleted by the source drive s file system. NOTE: When any option other than All Files is selected, options may be selected in conjunction with each other. Ex: Specific Files + Pictures will cause Mimic to include all picture files and any files entered by the user in the specific files list. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 32 of 54

33 Once the displayed settings are suitable for the current operation, click the forward arrow to proceed to the Review Selections screen. Carefully review the displayed settings. To make changes, click the left facing arrow (back) to return to the Configure Settings screen. If the displayed settings correctly indicate your source and destination drives, current operation and operational settings, click forward to begin the Fast Clone. Mimic will display a progress screen while the Fast Clone is running. When complete, the Operation Complete screen is shown. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 33 of 54

34 Use Case for Fast Clone Fast Clone can be useful for incremental snapshots of a working hard drive. This is one example: User John decides to fast clone his 500GB drive and stores All Files on the destination using Mimic s Fast Clone process. John then puts his original 500GB back into service; during this time, several files change and some are added. Again, John performs a Fast Clone using the same Source and Destination media. This time, Fast Clone merely detects the differences in the files and incrementally copies only the updated and added files. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 34 of 54

35 Erase Select the Erase icon to begin the data erasure process. Note: If an erasure performed by Mimic completes without error, the destination drive has been eased pursuant to NIST clear specifications. The Create Case screen is displayed. CPR Tools, Inc Hendry St Ft. Myers, FL Page 35 of 54

36 Begin by entering a name In the Case name field. Once this is done, the Forward arrow (right facing) appears. Click the forward arrow to proceed. Click the forward arrow to proceed. The Select Erase Destination screen is displayed. The destination must be attached to the one of the three ports on the right side of Mimic. Selecting a destination port will display all attached drives. If the drive is not displayed, click Rescan and select the appropriate port. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 36 of 54

37 Once a destination drive is selected, click the forward arrow. The Configure Settings screen is presented. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 37 of 54

38 The Configure Settings screen displays current settings which will affect how the current operation will be executed. User s may adjust these settings to suit the current job. Editable settings include: Byte Pattern (Hex) (Max/Min) User s may enter a custom pattern in this field. This value will be used by Mimic to overwrite each sector of the destination drive. Max/Min Clicking Max will cause Mimic to use the pattern 0xFF when overwriting the destination drive. Clicking Min will cause Mimic to use the pattern 0x00 when overwriting the destination drive. Erase Type If the default value of Byte Pattern is selected, users may enter a custom Byte Pattern in the Byte Pattern (Hex) field. Select Random Pattern to instruct Mimic to use a random byte pattern when overwriting each sector of the destination. Power On Timeout in seconds (Max/Min) Block Count in sectors (Max/Min) Command Timeout in seconds (Max/Min) Number of Passes (Max/Min) Selecting the Turn Drive off After Command box will instruct Mimic to power down drives (if possible) when the operation completes. Selecting the Stop Command On Error box will instruct Mimic to halt the operation if an error is encountered. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 38 of 54

39 Once the displayed settings are suitable for the current operation, click the forward arrow to proceed to the Review Selections screen. Carefully review the displayed settings. To make changes, click the left facing arrow (back) to return to the Configure Settings screen. If the displayed settings correctly indicate your source and destination drives, current operation and operational settings, click forward to begin the Erasure. Mimic displays a progress screen during the erasure process. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 39 of 54

40 When the erasure is complete, a confirmation screen is displayed. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 40 of 54

41 Resume Select the Resume icon to resume a previously saved Mimic case. The Cases to Resume screen is displayed. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 41 of 54

42 Resume-able cases for the current user are displayed. Select a case to resume by clicking on it. Upon selecting a case, the forward arrow is displayed. Click the forward arrow to load settings stored in the case. Users may highlight a case and click the Remove icon to clear its entry from the Mimic device. Based upon the case type, the user will be prompted for appropriate media sources and will proceed in carrying out the current operation using stored settings / values for the selected case. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 42 of 54

43 Utilities Click the Utilities icon to display Mimic s available utilities. These are Script, Hash and Format. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 43 of 54

44 Script A core capability of the Mimic device is the ability to create, store and re-use custom scripts of Mimic actions. By combining and ordering Mimic operations with user-specific settings, Mimic can be automated to perform user-defined actions. The Script screen contains four icons, summarized here.: Launch Click the Launch dropdown to select a previously saved script. Click the Launch icon to execute the script. Create Enter a new script name in the Create text box. Click the Create icon to begin creating the script. Edit Select a script from the Edit dropdown; click the Edit icon to begin editing the selected script. Delete Select a script from the Delete dropdown; click the Delete icon to delete the script. Each of these functions will be described in detail. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 44 of 54

45 Launch To launch a previously saved script, select the script from the dropdown list, then click the Launch icon. Create To create a script, type a script name in the text box, then click the Create icon. The Select an Operation screen is displayed. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 45 of 54

46 Select an operation to be included in the script, then click the forward arrow. To add another item, click the Add Pass button. This will cause the Select an Operation screen to be re-displayed. Continue adding passes until your intended task list is complete. To remove an operation, highlight it and click the Remove Pass button. Operations may be rearranged using the Move Up and Move Down buttons. CPR Tools, Inc Hendry St Ft. Myers, FL Page 46 of 54

47 When all desired operations have been selected and organized in the desired order, click the green check mark to save the script. Once saved, the user is returned to the Mimic Home Screen. Edit To edit an existing script, select its name from the dropdown list and click the Edit icon. The script details are displayed and is ready for editing. Users may add passes, remove passes and rearrange the order of listed operations. When editing is complete, click the green check mark icon to save the edited script. Once saved, the user is returned to the Mimic Home Screen. Delete To delete a script, select its name from the dropdown list. Once the script is selected, click the Delete icon to delete the script. A confirmation is presented. Click OK to be returned to the Mimic Scripts screen. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 47 of 54

48 Settings The Settings screen displays current settings which will affect how default operations will be executed. User s may adjust these settings to suit the current job. Editable settings include: Power On Timeout in seconds (Max/Min) Block Count in sectors (Max/Min) Command Timeout in seconds (Max/Min) Number of Passes (Max/Min) Error Handling Light (1 Pass) Moderate (2 Pass) Heavy (3 Pass) Selecting the Turn Drive off After Command box will instruct Mimic to power down drives (if possible) when the operation completes. Selecting the Stop Command On Error box will instruct Mimic to halt the operation if an error is encountered. Details on error handling follow. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 48 of 54

49 Error Handling The available selections for Error Handling are defined below. Light (1 Pass) This is the default and is will use the following settings when selected: Hard reset on error. Pass 1 Jumper4 is set to the block size. Moderate (2 Pass) Hard reset on error. Pass 1: Jumper is set to the block size. Pass 2: Jumper is set to one half of the block size. Heavy (3 Pass) Hard reset on error. Pass 1: Jumper is set to the block size. Pass 2: Jumper is set to one half of the block size. Pass 3: Attacker (no jump). Block size is one sector. Mimic control icons The Power, Switch/Lock, Home, Help and Device Control icons appear at the bottom of the screen when using Mimic. 4 A Jumper is a method which instructs Mimic to temporarily skip a certain number of sectors upon encountering an error. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 49 of 54

50 Power Clicking the Power icon will cause Mimic to ask for confirmation before shutting down and powering off the Mimic device. Click No to return to the Mimic Home Screen. Click Yes to proceed with the powering down of Mimic. Manage Users Click the Manage User s icon to create or select users within Mimic. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 50 of 54

51 The Manage Users screen provides an interface to select create and work with user profiles. Mimic ships with one user, DefaultUser. This user does not have a password and is the user profile used by default. Create A User To Create a User, click the New User icon from the Manage Users screen. Enter a name, a password and confirm the password. If the user being created is to have Administrator rights within Mimic, click the Administrator box. Click the Add icon to add the user. Mimic displays a confirmation message. Click OK. Mimic returns to the Manage Users screen showing the newly added user. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 51 of 54

52 Edit a User Update To edit a user, click the user s icon. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 52 of 54

53 Make any changes here, including to username, password and Administrator status; click the Update icon to record the changes. Mimic displays a confirmation of the change. Remove To remove a user, click the user s icon and click the Remove icon. Mimic displays a confirmation of the change. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 53 of 54

54 Home At any time, clicking the Home icon will return the user to the Mimic home screen. Help Clicking the Help icon displays a subset of the Mimic User s guide. Device Power Clicking the Device Power icon displays the Device Power screen which allows direct control over power for all Mimic ports. The center of the screen lists all Mimic ports displays a brief description of any attached media. If media is attached but not listed, click the Rescan button. The All On and All Off buttons control all of the media ports listed. Using these buttons, users may power on or off all ports on Mimic. At the right and left of the screen, icons appear for each of the two ports found on that side of the device. To power a port, click its icon. CPR Tools, Inc Hendry St Ft. Myers, FL info@cprtools.com Page 54 of 54