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[Equipment] Adventures with my corrupted SD card
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Slick7533 Offline

Members

Posts: 15
Joined: Nov 2014

Machine: Remstar Auto Aflex
Mask Type: Nasal mask
Mask Make & Model: Respironics Trueblue w/hgr
Humidifier: none at this time
CPAP Pressure: 6.0
CPAP Software: SleepyHead

Other Comments: newbie to CPAP as of 11/04/14 but OSA for long time

Sex: Male
Location: Burbank, California

Post: #1
Adventures with my corrupted SD card
After 3 weeks and 3 occasions of successful data captures of my sleep SD card on my Windows 7 Professional computer - after the fourth download the card was no longer able to be read by my CPAP machine when I put it back in. HuhDont-know

I was careful each time to turn off the power and lock the card but it still got corrupted. I suspect the cheap card reader I used may have done something.

There is no utility in the Respironics machine to reset or troubleshoot the SD card so I had to explore other options. I really did not want to go back to my provider to pay 10 times the price for a standard SD card.

Anyway, I noticed when I looked at the Windows explorer that the file structure in the SD card looked just like any other data storage device on a Windows machine so I figured I had nothing to lose by reformatting the SD card and trying to start over. Now all I had to do was figure out how to reformat an SD card and hope it worked

Before the corruption, there was a folder visible that looked exactly like this:

P-Series\

After corruption, the folder looked like this:

P-S#*+êª

Clearly a problem.Oh-jeezOh-jeez

In that folder is where the actual data is written in about a dozen separate files with numeric names. I had seen them before but they were no longer visible or accessible at all following the corruption even though the card still reported over 1 gigabyte of data on it

After some research I discovered the SD Formatter Download from the SD Association.

https://www.sdcard.org/


It's completely free and they have documentation and it's pretty easy to set up and run.

I downloaded it, ran it at the least comprehensive (basic) level and all the gobbledygook on the card was gone.

With my fingers crossed I recreated the directory 'P-Series\' and placed the card back in my CPAP machine.

It has been happily recording data ever since. All is well again in SD Card land.

If you are a little bit comfortable with computers, this is not hard to do. I hope you'll never need this procedure, but here it is if you do. Good luck and good sleep

Cheers
12-11-2014 02:31 AM
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justMongo Offline

Monitors

Posts: 3,845
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
Humidifier: ResMed H5i
CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

Other Comments: μολὼν λαβέ

Sex: Male
Location: Калифорния

Post: #2
RE: Adventures with my corrupted SD card
Just about any SD card will work. With the possible exception of SDHC cards.
ResMed uses a 2GB speed class 2 card.

You couldn't find it in "my Computer" -- right click -- and format?

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
12-11-2014 08:22 AM
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Slick7533 Offline

Members

Posts: 15
Joined: Nov 2014

Machine: Remstar Auto Aflex
Mask Type: Nasal mask
Mask Make & Model: Respironics Trueblue w/hgr
Humidifier: none at this time
CPAP Pressure: 6.0
CPAP Software: SleepyHead

Other Comments: newbie to CPAP as of 11/04/14 but OSA for long time

Sex: Male
Location: Burbank, California

Post: #3
RE: Adventures with my corrupted SD card
Dang, I didn't realize Windows had that built in now. It even supports different file systems and allocation units. I'm going to have to experiment with it. Looks like it might have even more options for compatibility than the downloaded utility
12-11-2014 11:06 AM
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archangle Offline
Wiki Editor
Advisory Members

Posts: 3,159
Joined: Feb 2012

Machine: ResMed S9 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: ResMed Swift FX
Humidifier: ResMed S9 H5i
CPAP Pressure: 16-20
CPAP Software: ResScan SleepyHead EncoreBasic

Other Comments: Happy PAPper

Sex: Undisclosed
Location: USA

Post: #4
RE: Adventures with my corrupted SD card
The windows format program usually works just fine for CPAP SD cards.

The special SD card formatter is mostly for the copy protection BS for music downloads. I don't know if anyone actually uses that copy protection garbage these days anyway. Note that "Secure" in "Secure Digital" is "security" for the record companies from you being able to access the data on the card, not "security" for you, the owner of the card.

Pretty much any SD or SDHC card will work on ResMed or PRS1 machines, although occasionally someone will report that SDHC won't work for them. The machine won't use the extra space on cards larger than 2 GB, but they usually work.

I recommend simply replacing the card if you have any problems, especially after trying a reformat one time. They're cheap enough to not worry about. In my experience all SD cards are fairly unreliable, and you just need to replace them when they go bad.

Get the free SleepyHead software here.
Useful links.
Click here for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.
12-11-2014 04:19 PM
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