[Pianod] Compiling on Raspberry Pi A+

[Perette Barella]

I just noticed a mistake in this procedure.  I used device capacity (1K-blocks column) instead of free space (Available column).  The second step should be:

> - Now make a temp file a little smaller than the free capacity.  dd uses 512-byte blocks:
> dd if=/dev/random count=17000000 | tee foobar | cksum


--
Perette Barella • perette at barella.org • 585-286-1312
176 Middlesex Road, Rochester NY 14610

> On 2016年07月23日, at 19:38, Perette Barella <perette at barella.org> wrote:
> 
> You could do something like this to make sure what’s being written to the SD card is consistent
> - Get the free space on the device:
> $ df -k .
> Filesystem     1K-blocks    Used Available Use% Mounted on
> /dev/root       15183756 5530452   8980448  39% /
> 
> - Now make a temp file a little smaller than the free capacity.  dd uses 512-byte blocks:
> dd if=/dev/random count=30000000 | tee foobar | cksum
> 
> - When that completes
> cksum foobar
> 
> - If the checksums don’t match… then I/O to your SD card isn’t being consistent.  Of course, this checks free space, and there could be bad areas that contain operating system and the compiler.
> 

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