Frequent file corruption when transferring files using CC

Rewarp · 03-28-2015, 10:30 AM

First of all, thank you for this convenient project. If it works without issue, this would be the perfect reading management application.

That said, I have tried over the past week to transfer files using the "Wireless device" setting in Calibre and CC and unfortunately, most of the files I moved to the tablet is regretfullly corrupted.

This seems more likely when I am moving a whole bunch of books at the same time.

I usuallly move my files using KDE Connect, and file transfer is usually error free, barring the occasional corruption issue as well, though not to the extent of approximately 80% of my transferred books.

The books are moved to the external MicroSD card directly using CC, which is a 64 GB FAT32 filesystem.

I can send an example of two ebooks. One corrypted file from the tablet, and a working one from my Calibre library.

chaley · 03-28-2015, 12:08 PM

It is almost certain that the corruption is caused by the SD card, either because it is faulty, because the file system is corrupted, or because the device does not know how to use such a large card. This position is supported by KDE Connect also producing corrupted files.

You can easily test this by changing CC's book directory to the device's main memory, sending some books, and seeing if they are corrupted. Another test would be to try a different SD card that is smaller and made by a known reliable company. If your device is rooted then a third check would be to do a file system check of the SD card as described on this page.

If for some reason you don't want to do these tests and if you have purchased CC then contact us for a refund.

hleo12 · 03-28-2015, 05:29 PM

I haven't encountered any corruptions in the past four months of using CC.

I even transferred all my books (1 thousand plus) to my phone all in one go and didn't have any corrupted files.

I'm using a 32GB SanDisk one.

Rewarp · 03-28-2015, 11:41 PM

I just did a test transfer of a lot of books to the internal SD Card. You are right. My external SD Card has problems. I will see what I can do to fix it, thanks for the tips!

It would appear I am just lucky that KDE Connect somehow transfers most of my files without corruption directly to the micro SD card. Maybe there is some checksum going on, or something.

Anyway, I won't ask for a refund, because I would like to support the further development of Calibre anyway. Thanks for helping to make such a fantastic project better!

chaley · 03-29-2015, 04:42 AM

Quote:

Originally Posted by Rewarp

I just did a test transfer of a lot of books to the internal SD Card. You are right. My external SD Card has problems. I will see what I can do to fix it, thanks for the tips!

The first thing to try is to reformat the card. If that doesn't fix it then because some cards report more space than they actually have, try reformatting the card using less space than the card says it has.

If you have access to a card reader then you can use one of the test programs to verify the card. Try http://oss.digirati.com.br/f3/ for linux or http://www.softpedia.com/get/System/.../H2testw.shtml for windows.

Quote:

Anyway, I won't ask for a refund, because I would like to support the further development of Calibre anyway. Thanks for helping to make such a fantastic project better!

Dopedangel · 03-31-2015, 01:29 AM

Apart from what chaley recommended. I would also recommend to format your card to exFAT instead of Fat32.

03-28-2015, 10:30 AM	#1
Rewarp Member Posts: 10 Karma: 10 Join Date: Mar 2015 Device: Zareason Zatab2	Frequent file corruption when transferring files using CC First of all, thank you for this convenient project. If it works without issue, this would be the perfect reading management application. That said, I have tried over the past week to transfer files using the "Wireless device" setting in Calibre and CC and unfortunately, most of the files I moved to the tablet is regretfullly corrupted. This seems more likely when I am moving a whole bunch of books at the same time. I usuallly move my files using KDE Connect, and file transfer is usually error free, barring the occasional corruption issue as well, though not to the extent of approximately 80% of my transferred books. The books are moved to the external MicroSD card directly using CC, which is a 64 GB FAT32 filesystem. I can send an example of two ebooks. One corrypted file from the tablet, and a working one from my Calibre library.

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03-28-2015, 12:08 PM	#2
chaley Grand Sorcerer Posts: 11,740 Karma: 6997045 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	It is almost certain that the corruption is caused by the SD card, either because it is faulty, because the file system is corrupted, or because the device does not know how to use such a large card. This position is supported by KDE Connect also producing corrupted files. You can easily test this by changing CC's book directory to the device's main memory, sending some books, and seeing if they are corrupted. Another test would be to try a different SD card that is smaller and made by a known reliable company. If your device is rooted then a third check would be to do a file system check of the SD card as described on this page. If for some reason you don't want to do these tests and if you have purchased CC then contact us for a refund.

03-28-2015, 05:29 PM	#3
hleo12 Guru Posts: 631 Karma: 5078890 Join Date: Feb 2014 Device: Kobo Glo (deceased), Kindle 4th, Kindle Basic 10th Generation	I haven't encountered any corruptions in the past four months of using CC. I even transferred all my books (1 thousand plus) to my phone all in one go and didn't have any corrupted files. I'm using a 32GB SanDisk one.

03-28-2015, 11:41 PM	#4
Rewarp Member Posts: 10 Karma: 10 Join Date: Mar 2015 Device: Zareason Zatab2	I just did a test transfer of a lot of books to the internal SD Card. You are right. My external SD Card has problems. I will see what I can do to fix it, thanks for the tips! It would appear I am just lucky that KDE Connect somehow transfers most of my files without corruption directly to the micro SD card. Maybe there is some checksum going on, or something. Anyway, I won't ask for a refund, because I would like to support the further development of Calibre anyway. Thanks for helping to make such a fantastic project better!

03-31-2015, 01:29 AM	#6
Dopedangel Wizard Posts: 1,759 Karma: 30063305 Join Date: Dec 2006 Location: Singapore Device: Boyue	Apart from what chaley recommended. I would also recommend to format your card to exFAT instead of Fat32.