IVM.DLL

IVM.DLL is a renamed version of IBM's LVM.DLL (Logical Volume Manager) that was included on eComStation.

eComStation included a new LVM.DLL that forwards some of its functions to IVM.DLL. It was reported that the newer "LVM.DLL forwarder" bypasses a couple of checks so that Bootable JFS and Air-BOOT can work seamlessly.

The newer "LVM.DLL forwarder" intercepts some functions like:

• The Start_Logging and Stop_Logging functions to enable merging its own log data with the LVM log (when LVM logging is turned on).
• It also wraps Open_LVM_Engine to save copies of any Windows NT disk signatures from the MBR, and wraps Commit_Changes to restore them back (except when an explicit newmbr operation was performed).
• It wraps Get_Volume_Information to always report compatibility volumes as Bootable if Air-Boot is installed.
• And similarly wraps Get_Valid_Options to report than a compatibility volume can be set as Installable if Air-Boot is installed.

Tip

Set the environment variable LVM_LOGWRAPPER=1, then run LVM with the /startlog parameter, the wrapper's own log will get added to the log generated by LVM.

Version

Date	Version	Size	Comments
2010-03-24		147,695 bytes

DLL Entry Points

1. Get_Partition_Handle
2. Remove_Boot_Manager
3. Get_Boot_Manager_Menu
4. Assign_Drive_Letter
5. ADD_TO_BOOT_MANAGER16
6. REMOVE_BOOT_MANAGER16
7. Set_Min_Install_Size
8. INSTALL_BOOT_MANAGER16
9. Export_Configuration
10. ASSIGN_DRIVE_LETTER16
11. GET_PARTITION_HANDLE16
12. SET_MIN_INSTALL_SIZE16
13. EXPORT_CONFIGURATION16
14. Get_Installable_Volume
15. Hide_Volume
16. Get_Drive_Control_Data
17. GET_BOOT_MANAGER_MENU16
18. Read_Sectors
19. HIDE_VOLUME16
20. Get_Volume_Information
21. Set_OS_Flag
22. Get_LVM_View
23. Stop_Logging
24. Set_Startable
25. Start_Logging
26. SET_OS_FLAG16
27. GET_INSTALLABLE_VOLUME16
28. READ_SECTORS16
29. GET_DRIVE_CONTROL_DATA16
30. Create_Volume
31. Delete_Volume
32. GET_LVM_VIEW16
33. Write_Sectors
34. STOP_LOGGING16
35. Get_Boot_Manager_Handle
36. Expand_Volume
37. GET_VOLUME_INFORMATION16
38. GET_BOOT_MANAGER_HANDLE16
39. Get_Partitions
40. SET_STARTABLE16
41. Commit_Changes
42. Get_Boot_Manager_Options
43. START_LOGGING16
44. Remove_From_Boot_Manager
45. Set_Boot_Manager_Options
46. Set_Free_Space_Threshold
47. CREATE_VOLUME16
48. Boot_Manager_Is_Installed
49. DELETE_VOLUME16
50. Get_Volume_Control_Data
51. WRITE_SECTORS16
52. EXPAND_VOLUME16
53. GET_BOOT_MANAGER_OPTIONS16
54. Get_Partition_Information
55. REMOVE_FROM_BOOT_MANAGER16
56. SET_BOOT_MANAGER_OPTIONS16
57. GET_VOLUME_CONTROL_DATA16
58. GET_PARTITIONS16
59. COMMIT_CHANGES16
60. SET_FREE_SPACE_THRESHOLD16
61. Changes_Pending
62. CHANGES_PENDING16
63. Set_Installable
64. Get_Reboot_Flag
65. Open_LVM_Engine
66. Set_Reboot_Flag
67. Reboot_Required
68. BOOT_MANAGER_IS_INSTALLED16
69. Set_Active_Flag
70. Rediscover_PRMs
71. SET_INSTALLABLE16
72. Close_LVM_Engine
73. GET_REBOOT_FLAG16
74. OPEN_LVM_ENGINE16
75. SET_REBOOT_FLAG16
76. REBOOT_REQUIRED16
77. GET_PARTITION_INFORMATION16
78. SET_ACTIVE_FLAG16
79. Create_Partition
80. Get_Reserved_Drive_Letters
81. Delete_Partition
82. REDISCOVER_PRMS16
83. Get_Install_Flags
84. Get_Drive_Status
85. Set_Install_Flags
86. Get_Valid_Options
87. CLOSE_LVM_ENGINE16
88. CREATE_PARTITION16
89. DELETE_PARTITION16
90. GET_DRIVE_STATUS16
91. Refresh_LVM_Engine
92. GET_RESERVED_DRIVE_LETTERS16
93. Get_Available_Drive_Letters
94. Free_Engine_Memory
95. GET_AVAILABLE_DRIVE_LETTERS16
96. New_MBR
97. GET_INSTALL_FLAGS16
98. Set_Name
99. SET_INSTALL_FLAGS16
100. NEW_MBR16
101. GET_VALID_OPTIONS16
102. REFRESH_LVM_ENGINE16
103. FREE_ENGINE_MEMORY16
104. SET_NAME16
105. Install_Boot_Manager
106. Add_To_Boot_Manager

DLLs Loaded

• DOSCALL1.DLL
• NLS.DLL
• MSG.DLL

Used by

• LVM.DLL

Device Driver Requirement

• OEMHLP$ -