How does my S9 determine "night"s?

[breakfast]

I've had my S9 less than two weeks. Last night, my son kept me up late and I ended up going to bed about 3 and sleeping past noon today. When I checked my nightly stats, Sleep Report was showing .7 hours of use. I know I used it much longer. It also shows 14 nights of use. Going by the calendar, last night would have been 12.

I would download the data and go over it using Rescan, but I only have Mac and Linux computers kicking around.

Any ideas how these nights are determined and why I might be missing 8 hours of data?

[KatieW]

ResMed's "day" starts at noon, and ends at noon the next day. So if you sleep past noon, you've gone into the next day.

[breakfast]

I suspected as much, but I was not sure. Thanks for confirming!

[chunkyfrog]

Did you check the nights use before you slept with it? Maybe the DME had it on the morning before to test it--that would have added a day.
The three hours will probably be added to the subsequent night .

[jweeks]

I would download the data and go over it using Rescan, but I only have Mac and Linux computers kicking around.

Hi,

Is one of those Macintosh machines an Intel-based Mac? If so, you can run Rescan using XP under Parallels. It works like a champ. It even installs the right USB drivers, and Parallels emulates the PC USB closely enough that downloads from the smart card work exactly as expected.

-john-

[breakfast]

@Chunkyfrog It had zero hours on it when it arrived. My RT had done some preliminary testing and then cleared all data, so it was reading 0 days.

@jweeks It is an Intel-based Mac. It's nearing the end of its useful life, though. Maybe I'll install Parallels on the next machine.

[M.D.Hosehead]

Also, Breakfast, you can run Windows software on you Mac with Boot Camp, which you probably already have in your utilities folder. EncoreViewer is working fine for me that way.

The disadvantage to Boot Camp, compared with Parallels, is that you have to restart your computer each time you change from OSX to Windows and then restart again to get back to OSX.

[breakfast]

I do have Boot Camp, but I don't have enough space to partition the drive and install Windows. Quelle bummer

[ldj325]

I do have Boot Camp, but I don't have enough space to partition the drive and install Windows. Quelle bummer

I don't know your situation or what you have on your computer (and external usb hard drives are cheap in case you decide to move some files), but having Res
Scan 3.11 would open up a whole new world of data for you. If you had 3.11 you would probably (I've never personally had your situation to know for sure) see the bulk of the missing sleep data on the previous day report which could be easily pulled up.