Hi,
I had done a few proxies for ImDisk in the past based on the libyal libraries (vmdk, qcow, vhd, ewf).
This time, as the VDI image format is quite simple, I made my own proxy for VDI images.
Imdisk + Discutils could achieve the same except that discutils requires .Net 4.0 which is not always available.
It is an early version (no error handling) and I was able to test dynamic images only.
It supports only "read only" for now but it should easy enough to implement "read write" if requested.
As always the command line :
"server" -> devio --dll=proxy.dll;dllopen shm:test_proxy c:\temp\freedos.vdi
"client" -> imdisk -a -t proxy -o shm -o ro -f test_proxy -m x:
Use the start command in front of devio if you want to stuff it all in one batch.
Regards,
Erwan
PS: Devio should output something similar to the below.
File to open: c:\temp\freedos.vdi szFileInfo:<<< Oracle VM VirtualBox Disk Image >>> u32Signature:BEDA107F u32Version:65537 cbHeader:400 u32Type:1 fFlags:0 szComment: offBlocks:4096 offData:8192 cCylinders:0 cHeads:0 cSectors:0 cbSector:512 cbSector:0 cbDisk:524288000 cbBlock:1048576 cbBlockExtra:0 cBlocks:500 cBlocksAllocated:108 Successfully opened 'c:\temp\freedos.vdi'. Read request - size:1536 offset:0 vdi_read_buffer_at_offset - size:1536 offset:8192 Image size used: 524288000 bytes. Read request - size:512 offset:0 vdi_read_buffer_at_offset - size:512 offset:8192 Detected a master boot record at sector 0. Using partition 1. Total size: 524288000 bytes. Using 523805184 bytes from offset 32256. Required alignment: 1 bytes. Buffer size: 2097152 bytes. Shared memory operation. Waiting for connection on object test_proxy. Press Ctrl+C to cancel. Connection on object test_proxy. Read request - size:512 offset:32256 vdi_read_buffer_at_offset - size:512 offset:40448 Read request - size:8192 offset:32256 vdi_read_buffer_at_offset - size:8192 offset:40448 Read request - size:126976 offset:36352 vdi_read_buffer_at_offset - size:126976 offset:44544 Read request - size:4096 offset:288768 vdi_read_buffer_at_offset - size:4096 offset:296960 Connection closed. Close request Image close result: 0
Attached Files
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vdi_proxy01.zip 25.98KB
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