Invalid SD card, erase card data? Yes No

[NateS]

Starting about 4-6 weeks ago, I have been presented with this message nearly every night, when I remove my sd card from my computer, unlock it and re-insert it in my ResMed Adapt:



So I erase it, run the machine all night, remove the sd card in the morning, lock it, insert it into my computer, and import the data into SleepyHead/Mac and into ResScan/Windows 10.

I have been following this unlock/lock process faithfully all through 2012, 2013, 2014, and 2015. The problem may have started around the time I upgraded from Windows 7 to 10, but that may be a coincidence.

The charts in both SleepyHead/Mac and ResScan/Windows continue to look normal, just as they always have, with graphs and statistics all filled out, but the constant need to erase the card every night before turning on the Adapt is very annoying.

I have tried switching between 4 different brand new SanDisk 4 GB Class 4 SD Flash Memory Cards and finally even got a new ResMed certified and branded SD card from my local DME, but the problem persists.

In all other respects, everything works normally. My ResMed machine was new put into service in December of 2011.

Any suggestions?

Best wishes, Nate

[grayghost4]

Are you using two different computers ... or windows in a virtual machine on the Mac ?

What happens if you just load into one OS and test it back in the S9 ?
To find out which OS is writing the file to the card

[bwexler]

My guess would be the card reader slot is getting worn, dirty and sloppy, causing it to misread the card.
There was a thread here a week or so ago that discussed repairing the sad reader. I didn't pay much attention to it. You might want to dig it up and see if it provides some insight.

[Gasper62]

All the talk of damaged card slots has got me thinking that maybe an "extension cord" that stays plugged into the PAP machine's slot permanently might be a good thing to get. This would leave all the wear and tear to the extension and the card, theoretically. Anyone see any reason why it wouldn't work OK ? OTOH,it might be a bad idea for folks that own cats, presenting kitty with one more thing to bat around/destroy. ~~ http://www.ebay.com/itm/like/2521671231 ... ps&lpid=82

[bobmc]

My sister has the same problem with her S9, but only when the S9 is unplugged. She's taken to removing the SD card before unplugging the machine. Still has issues if the power goes out.

[palerider]

Starting about 4-6 weeks ago,...
The problem may have started around the time I upgraded from Windows 7 to 10, but that may be a coincidence.

I'm guessing not.

all sd card readers *should* have a switch on the side that detects the position of the lock slider.

I've seen at least one that doesn't, and I've seen a couple where the switch (which is often just a springy wire that touches another wire when the slider is in one position or the other) doesn't work, got crufty, etc.

I'd pick up a cheap usb sdcard reader and try that.

win7 didn't write annoying housekeeping files on the card, win10 does.... like macs.

[Sir NoddinOff]

All the talk of damaged card slots has got me thinking that maybe an "extension cord" that stays plugged into the PAP machine's slot permanently might be a good thing to get. This would leave all the wear and tear to the extension and the card, theoretically. Anyone see any reason why it wouldn't work OK ? OTOH,it might be a bad idea for folks that own cats, presenting kitty with one more thing to bat around/destroy. ~~ http://www.ebay.com/itm/like/2521671231 ... ps&lpid=82

Never thought of that SD extender option. I just bought one for about seven bucks (from Hong Kong). I'll report back if it does or doesn't work like it should.

[NateS]

This is the reader I've been using for over a year and a half, but the problem only started about a month and a half ago:



To incriminate or eliminate the reader as the cause, I removed the PNY that usually occupies my built-in card reader port on the side of my MacBook Pro, turned on Show Hidden Files, inserted the SD card directly into the built-in card reader port, and got the following revelation. (Grey entries are hidden files.)

Before SH Import:


After SH Import:


After Win10/ResScan startup:


After Win10/ResScan D/L:


After Ejection & Reinsert via USB Reader:


Looks like the Mac is definitely the culprit, ignoring the lock, but at two different insertion points? (The USB reader goes into a USB hub, not directly into the Mac's USB port.)

Regards, Nate

[thecpapguy!]

It would be amazing if Resmed would link sleepy head to the wireless module built into the machine! Then you could do what your provider does to look up your download data!

[palerider]

It would be amazing if Resmed would link sleepy head to the wireless module built into the machine! Then you could do what your provider does to look up your download data!

the wireless doesn't provide detailed data, just summary.

[palerider]

This is the reader I've been using for over a year and a half, but the problem only started about a month and a half ago:

that looks like one of the ones I've seen that doesn't have a 'write protect detect switch' inside.

I've got one similar that doesn't have a switch on it.

[NateS]

This is the reader I've been using for over a year and a half, but the problem only started about a month and a half ago:

that looks like one of the ones I've seen that doesn't have a 'write protect detect switch' inside.

I've got one similar that doesn't have a switch on it.

I see your point, but then how would I account for the fact that the reader has been in use with the apnea sd card(s) for over a year and a half, yet the problem reading them in my xpap only started about 6 weeks ago? And this morning's examples above occurred when I had the sd card directly inserted into the computer's built-in sd slot and not into the reader?

Regards, Nate

(PS to pr - plz ck yr pms.)

[billbolton]

Win 8 and 10 write a file onto the SD card FAT file system for search indexing purposes, which upsets the simple FAT file system handler in the S9 (which is a process controller, not a general purpose computer). Win 7 doesn't do that.

Since the problem only appeared with the use of Win 10, the reader being used on the computer is almost certainly ignoring the setting of the lock slider on the SD card and writing to the card.

Time to get a better quality SD card reader

[palerider]

I see your point, but then how would I account for the fact that the reader has been in use with the apnea sd card(s) for over a year and a half, yet the problem reading them in my xpap only started about 6 weeks ago? And this morning's examples above occurred when I had the sd card directly inserted into the computer's built-in sd slot and not into the reader?)

well, you DID say you changed from win7 to win10 around the time it started messing up.

sd card readers are cheap, and returnable if that's not the issue... but, SOMETHING is keeping the 'puter from honoring the "don't write" switch/signal from the reader.