[Yaffs] [Yaffs-archive] RE: Physical block 0 in NAND flash devices

[Nick Bane]

I believe the comments below to be entirely correct but irrelevant in =
this case.

Physical block zero is not being ignored by yaffs as a special block =
reserved for some other critical function. It is just that the =
"undefined" value for a logical block in yaffs is zero.

Nick Bane
  -----Original Message-----
  From: Don Goodeve [mailto:dgoodeve@acumalabs.com]
  Sent: 17 June 2004 18:07
  To: guxm@utstar.com
  Cc: yaffs@toby-churchill.org
  Subject: Physical block 0 in NAND flash devices


  Dear GUXM et al.

  =20

  The reason for physical block 0 being used differently and reserved is =
that it is the *only* block in NAND flash devices that the manufacturer =
guarantees to be free of defects. All other blocks in the device are =
subject to being mapped out at the foundry, or later in the field.

  =20

  Check the documentation for your physical devices.

  =20

  Cheers

         Don

  =20


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