Filesystem:/usr/local/bin/ioflashstoragetool

This tool seems be present in restore ramdisks for formatting NAND flash.

Usage
ioflashstoragetool: Low-level NAND flash utility

Options: --verbose          Be talkative about what the tool is doing. --noisy            Be extremely noisy while doing things. --quiet            Don't show progress output. Multi-bank addressing: p            Addresses all banks, starting at bank 0, page. b           Addresses all banks, starting at bank 0, block. In these modes, page/block counts are per-bank and all operations start at bank zero. / may be decimal or hex preceeded by 0x. Single-bank addressing: p      Addresses bank, starting at page. b     Addresses bank, starting at block. In these modes, page/block counts are for the selected bank only. is decimal, / may be decimal or hex preceeded by 0x. Commands: format Writes partition table to pages 0 and 1 of block 0 of all devices. The may be one of: s5l8720x s5l8920x --force              Performs format even if an AND signature is                                   detected.

NAND info example output
NAND Configuration Vendor:          	Hynix Lithography:     	26nm Capacity:        	64GB Firmware Version: 	020076P......... (30 32 30 30 37 36 50 00 00 00 00 00 00 00 00 00) ManufacturerID:  	0x4201220182ad Num of CEs:      	4 PPN Device:      	Yes PPN Version:     	1.0.6 PPN Toggle:      	No 4 CEs of 4 CAUs of 2048 blocks of 256 pages of 8192 bytes data, 32 bytes spare 2040 superblocks 4096 pages/superblock -> 8192 vbas/superblock