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14 August 2014, 20:36
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#1 |
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Registered User
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Location: Germany
Posts: 561
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CHD harddrives
Maybe it is the wrong thread.
Toni I have a question: Is it possible to support the HD CHD format? WinUAE support already the CD CHD format.  AmigaOS3.9 CyberStorm PPC 2.hdf = 268.435.456 bytes AmigaOS3.9 CyberStorm PPC 2.chd = 29.048.832 bytes The hard disk image (CHD) is already uncompressed (no zlib, lzma, huff, flac, et cetera) so it should be writeable. Last edited by AnnaWu; 14 August 2014 at 21:43. |
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15 August 2014, 14:10
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#2 | ||
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Amiga 500 User
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Quote:
Quote:
 p.s. Anyway thanks for a new request. 
Last edited by amilo3438; 15 August 2014 at 14:35. |
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15 August 2014, 16:46
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#3 | |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
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Quote:
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15 August 2014, 17:08
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#4 |
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Amiga 500 User
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I assume that the request was for the desire to be compatible with MESS/Amiga emulator driver !?
p.s. I guess the point is if one has already an .hdf file to transfer it into HD CHD format that is far smaller. (Currently a such HD .chd file is not supported in WinUAE ... only CD .chd is supported)
Last edited by amilo3438; 15 August 2014 at 20:03. Reason: corrections |
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15 August 2014, 19:31
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#5 | |
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Quote:
Additional if I want use hard disk images as "read-only" it can be compressed too. Further Pro's: 1.) use existing CHD images 2.) easy conversion from HDF to CHD Anna Last edited by AnnaWu; 15 August 2014 at 19:36. |
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15 August 2014, 20:05
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#6 | |
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Amiga 500 User
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Quote:
Last edited by amilo3438; 15 August 2014 at 20:12. |
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15 August 2014, 20:12
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#7 |
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Posts: n/a
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Anna, support chd in WinUAE there and it works. Just checked:
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15 August 2014, 20:25
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#8 | |
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Amiga 500 User
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Quote:
Have you tried to save something on your .chd file ? (does it work) |
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15 August 2014, 20:27
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#9 |
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Registered User
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Yaranga, let me make a double check.
amilo3438, no it is not the same because you have specify the CHS values (cylinders,heads,sectors) to create a HD CHD image. Here the source: http://git.redump.net/mame/plain/src/tools/chdman.c Last edited by TCD; 15 August 2014 at 20:37. Reason: Back-to-back posts merged. |
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15 August 2014, 20:33
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Quote:
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15 August 2014, 20:44
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#11 |
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Registered User
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If it is "read-only" I guess your HD CHD is compressed or WinUAE try to handle it as CD CHD image and the HD CHD image format (read-/writeable) is not supported.
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15 August 2014, 20:54
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#12 |
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Posts: n/a
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That's right, Anna, was the usual level of compression. Rebuilt CHD HD without compression - alas, the situation has not changed ...
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17 August 2014, 13:56
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#13 |
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WinUAE developer
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Location: Hämeenlinna/Finland
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http://www.winuae.net/files/b/winuae.zip may support writing to uncompressed chds. Not tested.
Take backup of your CHD before testing! |
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17 August 2014, 16:52
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#14 |
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Posts: n/a
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Test:
[ Show youtube player ]
Read only. 
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17 August 2014, 16:57
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#15 | |
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WinUAE developer
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Quote:
EDIT: I think I found the problem.. Last edited by Toni Wilen; 17 August 2014 at 17:40. |
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17 August 2014, 17:47
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#16 |
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WinUAE developer
Join Date: Aug 2001
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Should work now. Same winuae.zip URL. (Falls back to read-only if physical file can't be opened in read-write mode)
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17 August 2014, 18:14
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#17 |
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Good ...
Last edited by Yaranga; 17 August 2014 at 18:32. |
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17 August 2014, 18:25
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#18 |
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Registered User
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Excellent job, Toni
WinUAE seems now to support the HD CHD format. I was able to format the hard disk image. Before it was imaginary only without any changes. |
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17 August 2014, 18:29
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#19 |
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Posts: n/a
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And it works!
However, the difference in size is not obvious. After formatting, the new CHD was larger than the original HDF. But the converted disk image with an established system got a big gain in compression. Bravo, Maestro! |
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17 August 2014, 18:32
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#20 |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
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Always use quick format! Full format fills each block of drive with garbage.
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