Typical bad block counts

[Josh Boyer]

On Wed, 2007-02-21 at 10:44 -0500, Dave Kelly wrote:
> >The datasheet for those chips says up to 20 blocks can be bad.  That
> >includes both Bad blocks at MFG time, and bad blocks that can develop
> >later on.
> 
> No, this is the small block devices for which the max number
> of bad blocks is 160, per the datasheet (NAND01G-A).

Ah, sorry.  Was looking at the large block datasheet.

> My question though is the typical number of initial bad blocks,
> not the max. allowed. No MFG seams to discuss this.

Probably because 1) there isn't a typical number as it varies from
product lot to product lot and 2) nobody has bothered to try and track
it anywhere for the devices they've received.

josh