TIPS Hang and other error messages from update202044

[dicko]

Hi dicko, thanks. Would you consider using a WD Purple wear-leveling microSD card in an RPi to be in the same reliability ballpark as using an SSD a la Ward's posting? Or if not, at least good enough? I realize that this is an impossible question.

Can't really say, I prefer sandisk but since I started using them I haven't had a failure, if you need lots of storage , then an ssd is probably a better way to go.

 

[faixbp]

Can't really say, I prefer sandisk but since I started using them I haven't had a failure, if you need lots of storage , then an ssd is probably a better way to go.

I don't need any more than 32GB on my RPi. Interestingly, the posting you referenced on Reddit says that the WD Purple WDD032G1P0A microSD card support wear-leveling, but the WD datasheet for the G1P0A series (https://documents.westerndigital.co.../data-sheet-wd-purple-microsd-2879-810009.pdf) doesn't mention wear-leveling. I'm still looking for something explicit.

 

[dicko]

Read it again, especially the bit about "Got the answer today (12 Feb 2020):"

 

[faixbp]

Read it again, especially the bit about "Got the answer today (12 Feb 2020):"

I read where the writer quotes WD ("Our WD Purple MicroSD's do both static and dynamic wear-leveling. Meaning all blocks across whole address space are considered for wear leveling regardless of if and how the blocks are used. This keeps the number of program erase cycles consistent on all blocks."), but I'm looking for something on the WD website that says that.

 

[dicko]

I read where the writer quotes WD ("Our WD Purple MicroSD's do both static and dynamic wear-leveling. Meaning all blocks across whole address space are considered for wear leveling regardless of if and how the blocks are used. This keeps the number of program erase cycles consistent on all blocks."), but I'm looking for something on the WD website that says that.

It's likely that 'engineering' knows about whether they do wear leveling or not better than 'sales'

 

[ostridge]

WD Purple wear-leveling microSD

Well do you actually know it that will work in the RPi(?). Some RPi's have been a little picky regarding HW compatibility. The raspberrypi organisation has done some testing on whatever SD's or mSD's - maybe their research has answers about that - but hey who has the time for all the deviations when you can just get one up and running.

P.S. No point blaming HW when you haven't done testing of that.

No offence but maybe this thread is past its BBD.

 

[wardmundy]

The point being missed is that microSD cards are dirt cheap. BUY 2, make a backup, test it by booting the RasPi using it. Then put it on the shelf. Now you're protected. We have microSD cards that have been running 24/7 for many years without a problem.

 

[Halea]

If you are looking for better reliability consider running your RPi off of a USB attached external SSD rather than an SD card. Not only you will achieve better dependability but it will also perform better. With the latest RPi models it's quite easy to boot from USB and well documented. With older models you can still do it although it's a bit more convoluted.