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Using Magic Lantern => Hardware and Accessories => Topic started by: 7oo1er on August 29, 2016, 10:44:38 AM

Title: zero mov files and broken FAT with cf 128gb x1000
Post by: 7oo1er on August 29, 2016, 10:44:38 AM
Hello all.

I want to find an answer — who deside where to put data in compact flash?

5D Mark II, 128Gb SanDisk Extreme Pro (SDCFXPS-128G-X46) formatted in camera, ML Nightly (last week, I'll add version later) with "restart recording ON" and sharper screen only.

I used to shoot one video in a month, 2 hours long (broken by 12-15 mins movs), with an old and buggy Transcend 64 400x and old ML. Everything was fine for years. This week I moved to SanDisk, put a new ML. Did 3 raw photos, and 1,5 hour of 1920@25 videos. Almost default settings, ML only to sharper screen and restart recording.

And the result was awful. First 3 videos are broken. Deeper research shows: one mov file missing a FAT starting sector at all. The other one size is 96kb, it's starting sector begins right before previous raw photo. (I can show any shots form WinHex by demand.)

So, who to blame? Who desides "I'll write a video into this 96 kb of free space and drop the file"? Canon firmware, flash internal controler, ML driver?

Don't know is it a ML or CF or 5D bug. Don't know which answer is "better". Some people say "Don't use ML at all", I had something to say before this accident.
Title: Re: zero mov files and broken FAT with cf 128gb x1000
Post by: Walter Schulz on August 30, 2016, 01:42:59 PM
First use h2testw for Windows or f3/f3X for OS X to verify card's capacity. And make sure your cardreader is up-to-date (UDMA-7 compatible).

Are you able to tell error exists in cam or after inserting into cardreader only?
Title: Re: zero mov files and broken FAT with cf 128gb x1000
Post by: Kharak on August 30, 2016, 01:53:34 PM
And is your card formatted as FAT Or FAT32 ? Cause if its FAT, I think that is your problem.

Seems like a faulty card or card reader to me.
Title: Re: zero mov files and broken FAT with cf 128gb x1000
Post by: 7oo1er on September 05, 2016, 10:09:15 AM
Thanks.

CF card and ML were under suspicion, but... 5dm2 does 3 broken photo raws once a day in 1000 photos now, with different cards and ML versions. I'm waiting for repair service answer about this.