Re: [Efsl-devel] 127 file limit in a subdirectory
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Re: [Efsl-devel] 127 file limit in a subdirectory
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From: M. B. <m.b...@mi...> - 2006-07-07 07:09:15
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Hello Daniel,
I did the subdirectory test on an ARM7 (Atmel AT91SAM7S) with a 256MB SD
card. I was able to create 513 files in a single subdirectory without
any error. All files are accessible in the Explorer and Windows ScanDisk
doesn't complain about anything. So maybe this is not an EFSL issue.
Marko
Daniel Medeiros schrieb:
> I am using an ARM7 to do the writing - like i said on the notes, it
> writes it fine to the root (200 files), but not to a subdir.
> I am using a card reader from sandisk to read it into windows2k.
>
>
> I re-formatted the card to use 16 sectors per cluster, it still wont
> work - it seems that the code aborts after writing only a few files. Ill
> have to spend a bit more time to get some meaningful detail on the issue.
>
> Daniel
>
>
>
>
>
> M. Bester wrote:
>> Hello Daniel,
>>
>> Daniel Medeiros schrieb:
>>
>>> Here is a bit more of information. I have tried two 256M SD cards, both
>>> with the same result.
>>> efs.myFs.volumeId.SectorsPerCluster=8
>>>
>>> Here is a quick snippet of code:
>>>
>>>
>>> for(i=0;i<200;i++) {
>>> get_filename(&state,1);
>>> strcpy(&tmpstr,state.file_data);
>>> strcpy(state.file_data,"DATA/");
>>> strcat(state.file_data,tmpstr);
>>> file_fopen(&file_gpx,&efs.myFs,state.file_data,'w');
>>> file_write(&file_gpx,1,"2");
>>> delay_ms(10);
>>> file_fclose(&file_gpx);
>>> }
>>> fs_umount(&efs.myFs);
>>>
>>>
>> For me this looks okay.
>> I'm testing on a PC where I load an image file as medium. I've just put
>> the image file on a 256MB SD card and it looks fine under WinXP. The
>> format is 16 sectors per cluster.
>> What hardware are you using?
>>
>>
>>> The get_filename function just formats and creates my files (currently
>>> an index of 1up numbers).
>>> I append the directory info to it, then write 1 character, close the
>>> file, and loop.
>>> I am including a link of a screenshot of that directory (so you can see
>>> the corruption).
>>> http://www.marslabs.com/dir1.jpg
>>> http://www.marslabs.com/dir2.jpg
>>>
>>> Now, if I execute the same code on the root directory, I can write out
>>> the 200 files without a problem.
>>>
>>>
>>> Any ideas off hand? Thanks
>>>
>>> Daniel Medeiros wrote:
>>>
>>>> I am using 0.2.7 to create the files. I assumed 512 was for all dirs
>>>> (including the root). The issue for me still remains that for some
>>>> reason, after creating the 127th file, it trashes the fat table in the
>>>> subdir in question. Ill run some more tests on it to try to narrow where
>>>> the corruption is happening.
>>>>
>>>>
>>>> M. Bester wrote:
>>>>
>>>>
>>>>> Hello,
>>>>>
>>>>> what EFSL version are you using?
>>>>> I'm using 0.2.7 and I've just created 513 files in a single subdirectory
>>>>> without a problem.
>>>>> To my knowledge the limit of 512 files applies only to the root directory.
>>>>>
>>>>> Marko
>>>>>
>>>>> Daniel Medeiros schrieb:
>>>>>
>>>>>
>>>>>
>>>>>> I will check the FAT, and look at the # of clusters. I know that FAT16
>>>>>> has a limit of 512, and for the application I am making its possible
>>>>>> that there will be more files created than that over time, so Ill have
>>>>>> to roll them into directories anyway. The issue then would become is it
>>>>>> 100+ files per dir or 500+ files per dir.
>>>>>> Have a great Holiday
>>>>>>
>>>>>> Daniel
>>>>>>
>>>>>> Lennart Yseboodt wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Hi Daniel,
>>>>>>>
>>>>>>> Sounds like a bug to me. 127 is like 128, and 128/16=8.
>>>>>>> Is it possible you have 8 sectors per cluster ?
>>>>>>>
>>>>>>> I will try to look into this issue, but I will be honest, I'm leaving for
>>>>>>> hollidays on the 11th and have a lot of things to do until then, so
>>>>>>> if you need this fix fast you will have to do it yourself I'm afraid :)
>>>>>>>
>>>>>>> Maybe Michael has time ?
>>>>>>>
>>>>>>> Regards,
>>>>>>>
>>>>>>> Lennart
>>>>>>>
>>>>>>> Daniel Medeiros wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> I am running into a problem and before I spend too much time on it I
>>>>>>>> wanted to get your opinions as someone may put me on the right track.
>>>>>>>> Inside a subdirectory off the root of the SD, as soon as I write out 127
>>>>>>>> files, the contents of that directory get too garbled (it puts trash
>>>>>>>> data/directories).
>>>>>>>> I verified this with two different SD cards (so I dont think the issue
>>>>>>>> is the SD in question). Everything works fine until I hit that limit. I
>>>>>>>> know that FAT 16 has a limit of 512 files per directory, so I wouldn't
>>>>>>>> have though I would hit it this soon. Any suggestions as to what may be
>>>>>>>> going on? Thanks
>>>>>>>>
>>>>>>>> Daniel
>>>>>>>>
>>>>>>>> Using Tomcat but need to do more? Need to support web services, security?
>>>>>>>> Get stuff done quickly with pre-integrated technology to make your job easier
>>>>>>>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
>>>>>>>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>>>>>>>> _______________________________________________
>>>>>>>> Efsl-devel mailing list
>>>>>>>> Efs...@li...
>>>>>>>> https://lists.sourceforge.net/lists/listinfo/efsl-devel
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> Using Tomcat but need to do more? Need to support web services, security?
>>>>>>> Get stuff done quickly with pre-integrated technology to make your job easier
>>>>>>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
>>>>>>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>>>>>>> _______________________________________________
>>>>>>> Efsl-devel mailing list
>>>>>>> Efs...@li...
>>>>>>> https://lists.sourceforge.net/lists/listinfo/efsl-devel
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> Using Tomcat but need to do more? Need to support web services, security?
>>>>>> Get stuff done quickly with pre-integrated technology to make your job easier
>>>>>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
>>>>>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>>>>>> _______________________________________________
>>>>>> Efsl-devel mailing list
>>>>>> Efs...@li...
>>>>>> https://lists.sourceforge.net/lists/listinfo/efsl-devel
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>> Using Tomcat but need to do more? Need to support web services, security?
>>>>> Get stuff done quickly with pre-integrated technology to make your job easier
>>>>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
>>>>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>>>>> _______________________________________________
>>>>> Efsl-devel mailing list
>>>>> Efs...@li...
>>>>> https://lists.sourceforge.net/lists/listinfo/efsl-devel
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>> Using Tomcat but need to do more? Need to support web services, security?
>>>> Get stuff done quickly with pre-integrated technology to make your job easier
>>>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
>>>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>>>> _______________________________________________
>>>> Efsl-devel mailing list
>>>> Efs...@li...
>>>> https://lists.sourceforge.net/lists/listinfo/efsl-devel
>>>>
>>>>
>>>>
>>>>
>>>>
>>> Using Tomcat but need to do more? Need to support web services, security?
>>> Get stuff done quickly with pre-integrated technology to make your job easier
>>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
>>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>>> _______________________________________________
>>> Efsl-devel mailing list
>>> Efs...@li...
>>> https://lists.sourceforge.net/lists/listinfo/efsl-devel
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>> Using Tomcat but need to do more? Need to support web services, security?
>> Get stuff done quickly with pre-integrated technology to make your job easier
>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>> _______________________________________________
>> Efsl-devel mailing list
>> Efs...@li...
>> https://lists.sourceforge.net/lists/listinfo/efsl-devel
>>
>> !DSPAM:44ad2504197521497611852!
>>
>>
>
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> Efsl-devel mailing list
> Efs...@li...
> https://lists.sourceforge.net/lists/listinfo/efsl-devel
>
>
>
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