Based on a 4MB zone and a 3 % reserve block there would be 120k bytes of
reserve bytes per 4MB zone. According to the doc the pool is a random
assortment per zone. It all comes down to how fast 120k bytes wear out.
Modern hard drives have a reserve pool and replace sectors or tracks that are
predicted to fail or have failed automatically. The SanDisk method seems to be
a good compromise to extend life for a simple system like the flash cell. I
suspect that the implementation is fairly simple. A search of the patent
office might reveal the raw details.
Bobby
----- Original Message -----
From: Michael Schnell
To: uClinux development list
Sent: Thursday, March 26, 2009 7:05 AM
Subject: Re: [uClinux-dev] SD card corruption upon reboot and de-power
If this is true for a current card the OS would have a direct influence on
life
Right !
FAT is abysmal.
-Michael
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