Re: Files truncate on vfat filesystem

["Sumit Narayan" <sumit_uconn@lycos.com>]

This probably couldnt be the problem, but I have faced the similar problem on my XP machine, while transferring files ranging in 600MB+ from CD to HD. The transfer would be complete, and when I remove the CD, it showed the file size 0. I just assumed that the same problem existed with you also.
Sorry for wrong info..
Sumit 
--

On Tue, 6 May 2003 18:12:07   
 Peder Stray wrote:
>On Tue, 6 May 2003, Sumit Narayan wrote:
>
>> I think the problem that you are facing is because you umount the disk
>> immediately after transferring the file. Though ls indicates that the
>> file has been transferred, and the size match, the transfer would still
>> be in progress behind the scene, and once you umount, and remove the USB
>> disk, the data is lost, since the transfer was not complete.
>
>That is definitly not the problem... i have mounted both with and without
>the sync option, and umount usually hangs until all buffers are flushed to
>the disk.
>
>> You are facing this problem randomly, depending on how long you wait
>> after the transfer to remove the disk.
>
>yes, i usually have the disk mounted all the time it is connected to my
>computer, and umount/mount is just somthing i use to check if the files
>got transferred correctly
>
>> This happens when you are transferring large files, and not while using
>> small files.
>
>size doesn't matter at all with this problem... files ranging from under
>1k in size to well up under 1GiB have been truncated
>
>> This will happen even when you are transferring large files from your
>> CDs.
>
>never tried to copy from my cd.
>
>> I hope this helps. Just wait for few seconds after the transfer is done,
>> and you wont lose your data anymore.
>
>sorry to report that your input didn't help at all.
>
>> Regards,
>> Sumit
>> --
>>
>> On 06 May 2003 17:29:12 +020
>>  Peder Stray wrote:
>> >
>> >I have a 250GB usb-storage disk i use to transport large files between
>> >work and home, I uses vfat (since I haven't found any other good
>> >filesystems that don't require me to either be root or have all files
>> >worldreadable). Anyways...
>> >
>> >Some files get its size truncated to 0 after a while (usually a few
>> >minuts, or when i umount the disk). They seem to be the correct size
>> >when I do ls -l immediately after i have transfered the files (with cp
>> >or rsync, doesn't really matter). Moving files on the disk with mv also
>> >seems to trigger the problem sometimes.
>> >
>> >I see that blocks get allocated, but the filesizes are 0. Currently
>> >there is a difference of 17GB in the output of df and du.
>> >
>> >I have also noticed that the size of some directories get truncated too,
>> >thus all files copied or moved into those directories dissappear. ls -l
>> >in those directories doesn't even show . and ..
>> >
>> >it seem very inconsistent which files are affected, both in size, length
>> >of filename, unusual characters or depth in the filestructure. No
>> >messages from the kernel logs.
>> >
>> >A check of the filesystem from XP reports no errors in the
>> >filestructure, and it work 100% there.
>> >
>> >kernel versions used are are amongst 2.4.18 and 2.4.20, selfcompiled or
>> >stock from RH.
>> >
>> >More details can of course be supplied if anyone have any ideas what to
>> >check and how.
>> >
>> >any comments or help would be much appreciated as the loss of data i
>> >experience is more than a little annyoing.
>> >
>> >--
>> >  Peder Stray
>> >
>> >-
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>>
>>
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>
>-- 
>  Peder Stray
>


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