I tried it, but unfortunately mtdblock13 and mtdblock8 end up with a lot of errors that I don't know what they mean ..
only mtdblock11 shows no errors ..
mount -t nfs -o nolock 192.168.2.155:/Public /mnt/nfs00
# cat /mnt/nfs00/mtdblock11 > /dev/mtdblock11
# cat /mnt/nfs00/mtdblock13 > /dev/mtdblock13
[ 251.566012] fio_dma_parse_error: fio dma read error 0x5000800.
[ 251.571890] ambarella-nand ambarella-nand: nand_amb_request: cmd=0xe, addr_hi=0x0, addr=0x2cc0000, dst=0x0, buf=0xc595c000, len=0x800, area=0x2, ecc=0x2, block addr=0x2cc0000!
[ 251.592509] fio_dma_parse_error: fio dma read error 0x5000800.
[ 251.598395] ambarella-nand ambarella-nand: nand_amb_request: cmd=0xe, addr_hi=0x0, addr=0x2cc0800, dst=0x0, buf=0xc595c000, len=0x800, area=0x2, ecc=0x2, block addr=0x2cc0000!
[ 251.642505] fio_dma_parse_error: fio dma read error 0x5000800.
[ 251.648384] ambarella-nand ambarella-nand: nand_amb_request: cmd=0xe, addr_hi=0x0, addr=0x2cc1000, dst=0x0, buf=0xc595c000, len=0x800, area=0x2, ecc=0x2, block addr=0x2cc0000!
[ 251.692524] fio_dma_parse_error: fio dma read error 0x5000800.
[ 251.698406] ambarella-nand ambarella-nand: nand_amb_request: cmd=0xe, addr_hi=0x0, addr=0x2cc1800, dst=0x0, buf=0xc595c000, len=0x800, area=0x2, ecc=0x2, block addr=0x2cc0000!
[ 251.756391] end_request: I/O error, dev mtdblock13, sector 9472
[ 251.762338] Buffer I/O error on device mtdblock13, logical block 1184
[ 251.768777] lost page write due to I/O error on mtdblock13
[ 251.778209] fio_dma_parse_error: fio dma read error 0x5000800.
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.etc...to the end
# cat /mnt/nfs00/mtdblock8 > /dev/mtdblock8
[ 275.988155] nand_erase_nand: attempt to erase a bad block at page 0x00000dc0
[ 275.995336] mtdblock: erase of region [0xc0000, 0x20000] on "rcvy" failed
[ 276.002226] end_request: I/O error, dev mtdblock8, sector 1792
[ 276.008079] quiet_error: 22 callbacks suppressed
[ 276.012707] Buffer I/O error on device mtdblock8, logical block 224
[ 276.018976] lost page write due to I/O error on mtdblock8
[ 276.024606] nand_erase_nand: attempt to erase a bad block at page 0x00000dc0
[ 276.031678] mtdblock: erase of region [0xc0000, 0x20000] on "rcvy" failed
[ 276.038562] end_request: I/O error, dev mtdblock8, sector 1800
[ 276.044423] Buffer I/O error on device mtdblock8, logical block 225
[ 276.050688] lost page write due to I/O error on mtdblock8
[ 276.056374] nand_erase_nand: attempt to erase a bad block at page 0x00000dc0
[ 276.063544] mtdblock: erase of region [0xc0000, 0x20000] on "rcvy" failed
[ 276.070354] end_request: I/O error, dev mtdblock8, sector 1808
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.
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etc...to the end
in fact the camera appeared on the network, now I will try to update to 5.2.5 with
tftp