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Write Verification   Message List  
Reply | Forward Message #672 of 674 |
Re: Write Verification


>
> Hi/2.
>
> That's too bad.
>
> We should wait for another chance.
>
> KO Myung-Hun
>

KO the FM/2 development team has been looking at this issue. Here is
one of their posts.

Hi,

> >It isn't the drive is FAT16.
>> >>Does it happen for all IFS's?

> >No it only happens with the USB drive. The only report I saw where it
> >caused problems with a FAT32 drive was a USB drive also.

OK. That clarifies it somewhat. It appears to be USBMSD that is broken,
not some IFS.

> >The first try gave me a double listing of the
> >directory I copied but other wise worked. Rescan was fine delete
worked
> >fine. I could reproduce the double directory name only if it was the
> >first copy to any drive during a session (prior to the drive being
> >touched beyond initial scan) however it doesn't matter if verify is on
> >or off this appears to be an FM/2 problem.

This appears to be the case.

Back to our USBMSD issue. Can you replicate the problem from the command
line? Try the delete with

VERIFY ON

It would not surprise me if this is a timing error. The kernel/ifs is
trying to do the verify before the drive is ready for another operation.

If we do need workarounds, they can localized them somewhat with code like

apiret = DosDelete(...)
if (apiret == ERROR_GEN_FAILURE && fVerify && DriveIsRemovable(...)) {
// turn off verify
apiret = DosDelete(...)
// turn on verify
}

If the above, I am assuming that the delete step failed and not the verify
step. Is this the case?

Steven





Sun Dec 21, 2008 7:28 pm

dwgras
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Message #672 of 674 |
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Another user had this to say about write verificaiton. David Just a little idea: IIRC USB devices use a command set derived from IDE interface. IDE implements...
David Graser
dwgras
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Dec 9, 2008
3:20 am

Hi/2. ... If his guess is right, WRITE-VERIFY problem should occur regardless of file system of USB removable medias. But I cannot reproduce this situation. If...
KO Myung-Hun
lvzuufx
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Dec 9, 2008
12:02 pm

... Hi KO Write verification works OK with HPFS. David...
David Graser
dwgras
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Dec 12, 2008
1:39 am

Hi/2. Did you test the USB media which has a WRITE-VERIFY problem with FAT32 ? If so, FAT32 IFS seems to have a problem. That's too bad. T.T KO Myung-Hun...
KO Myung-Hun
lvzuufx
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Dec 12, 2008
4:46 am

... Hi KO I did not test it formatted fat32. However, after you asked, I formatted the drive fat32 and copied some files with write verification on. Write...
David Graser
dwgras
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Dec 12, 2008
5:11 am

... FAT32 ? ... KO I have checked 3 USB devices, one of which I had problems earlier with write verification using fat32 0.9.13 tests 1 and 2. An near as I can...
David Graser
dwgras
Offline Send Email
Dec 13, 2008
1:20 pm

... 0.9.13 GA. ... Hi/2. It's strange. As I said before, GA is the same as t1. If you're right, t1 should not work with your USB. Anyway, I think this is due...
KO Myung-Hun
lvzuufx
Offline Send Email
Dec 15, 2008
12:33 am

... Hi KO I think your are correct. All my successes were with eCS 2 RC6a. I just tried with eCS 2 RC4 and write verification hung. David...
David Graser
dwgras
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Dec 15, 2008
12:41 am

... Hi/2. How about HPFS or JFS ? If they also hang, WRITE-VERIFICATION error is not a problem of FAT32 IFS DRIVER. And other component has a clue, maybe...
KO Myung-Hun
lvzuufx
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Dec 15, 2008
1:25 pm

... Hi KO HPFS has no problem using write verification when writing to a USB drive. FAT32 does. The problem appears to be in the FAT32 driver. David...
David Graser
dwgras
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Dec 15, 2008
2:26 pm

... Hi/2. That's too bad. We should wait for another chance. KO Myung-Hun...
KO Myung-Hun
lvzuufx
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Dec 16, 2008
6:40 am

... KO the FM/2 development team has been looking at this issue. Here is one of their posts. Hi, ... OK. That clarifies it somewhat. It appears to be USBMSD...
David Graser
dwgras
Offline Send Email
Dec 21, 2008
7:28 pm
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