Visible to Intel only — GUID: nco1512365328211
Ixiasoft
Visible to Intel only — GUID: nco1512365328211
Ixiasoft
1.5.13.1. Bad Block Marker
A block is the smallest entity for erase. Although the bad area might happen at certain pages, the whole block is marked as a bad block. The bad block marker is in the spare area (OOB) within the first page of each block. A block is considered bad if the value of a bad block marker is not 0xFF.

Manufacturer | Chip Type | Page Size | Device Size | Bad Block Marker Location |
---|---|---|---|---|
Micron & Others 1 | SLC | 512 bytes | x8 | 6th byte at 1st page OOB |
Micron & Others1 | SLC | 512 bytes | x16 | 1st byte at 1st page OOB |
Micron & Others1 | SLC | >512 bytes | Any | 1st byte at 1st page OOB |
Micron | MLC | Any | Any | 1st byte at 1st page OOB |
Samsung | MLC | Any | Any | 1st byte at last page OOB |
Hynix | MLC | Any | Any | 1st byte at last page OOB |
Samsung | SLC | Any | Any | 1st byte at 2nd page OOB |
Hynix | SLC | Any | Any | 1st byte at 2nd page OOB |
Toshiba | SLC | Any | Any | 1st byte at 2nd page OOB |
AMD | SLC | Any | Any | 1st byte at 2nd page OOB |
Macronix | SLC | Any | Any | 1st byte at 2nd page OOB |