MTD utils v1.5.0: MEMERASE64 ioctl failed error

[Shah, Minal]

Resending this email as it got rejected, being in HTML format.

Hi Mike,
I am using MTD utils version 1.5.0 for DRA7 (Vayu) platform.

I have bad blocks in some of my NAND partitions which I am not able to erase from linux kernel.
Using "-N" option in flash_eraseall ideally should have allowed erasing the bad block but I land up in "MEMERASE64 ioctl failed" error. 
The reason for this error seems that "OFFS64_IOCTLS_SUPPORTED" is not set.
I haven't yet digged in detail to see why this ioctl fails but can you please tell me the possible reasons for the same? 

Please see the logs below for reference.

root at dra7xx-evm:~# flash_eraseall /dev/mtd0
flash_eraseall has been replaced by `flash_erase <mtddev> 0 0`; please use it
flash_erase: Skipping bad block at 00000000
Erasing 128 Kibyte @ 0 -- 100 % complete

root at dra7xx-evm:~# flash_eraseall -N /dev/mtd0
flash_eraseall has been replaced by `flash_erase <mtddev> 0 0`; please use it
Erasing 128 Kibyte @ 0 --  0 % complete [ 2298.842498] nand_erase_nand: attempt to erase a bad block at page 0x00000000
libmtd: error!: MEMERASE64 ioctl failed for eraseblock 0 (mtd0)
        error 5 (Input/output error)
flash_erase: error!: /dev/mtd0: MTD Erase failure
             error 5 (Input/output error)
Erasing 128 Kibyte @ 0 -- 100 % complete

root at dra7xx-evm:~# flash_eraseall -N -u /dev/mtd0
flash_eraseall has been replaced by `flash_erase <mtddev> 0 0`; please use it
Erasing 128 Kibyte @ 0 --  0 % complete libmtd: error!: MEMUNLOCK ioctl failed for eraseblock 0 (mtd0)
        error 95 (Operation not supported)
flash_erase: error!: /dev/mtd0: MTD unlock failure
             error 95 (Operation not supported)
Erasing 128 Kibyte @ 0 -- 100 % complete

root at dra7xx-evm:~# mtd_debug erase /dev/mtd0 0 131072
[ 1932.902496] nand_erase_nand: attempt to erase a bad block at page 0x00000000
MEMERASE: Input/output error


root at dra7xx-evm:~# nanddump -n -o -p -s 0x0 -l 0x800 --bb=dumpbad /dev/mtd0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000800...
0x00000000: 52 ff 00 ff 60 ff b3 ff 63 ff a9 ff 55 ff a6 ff
0x00000010: ba ff c3 ff 38 ff b8 ff b0 ff a5 ff 04 ff 3e ff
0x00000020: 51 ff a3 ff 81 ff 53 ff 07 ff 8f ff 75 ff 01 ff
0x00000030: c8 ff da ff 6b ff 6d ff d5 ff 70 ff df ff 27 ff
0x00000040: 70 ff 40 ff da ff d3 ff e9 ff 2f ff 79 ff a3 ff
0x00000050: f3 ff b1 ff 5b ff a3 ff 57 ff 60 ff e1 ff a8 ff
0x00000060: 03 ff 62 ff fb ff 0b ff f2 ff 70 ff 0c ff ba ff
0x00000070: 4b ff 77 ff 28 ff 20 ff e8 ff 07 ff 47 ff 58 ff
0x00000080: 47 ff 21 ff 2c ff 30 ff 51 ff a5 ff d3 ff 44 ff
0x00000090: 57 ff 2f ff e7 ff ae ff 8f ff c8 ff 56 ff 92 ff
0x000000a0: 2a ff 52 ff 9d ff 1c ff c2 ff aa ff d7 ff 0d ff
0x000000b0: 21 ff ff ff 2d ff 09 ff 06 ff 74 ff 62 ff 4e ff
0x000000c0: 96 ff 8e ff 7e ff e7 ff 33 ff 52 ff 2b ff 8a ff
0x000000d0: 81 ff 12 ff 38 ff 10 ff da ff 8f ff a2 ff 04 ff
0x000000e0: e1 ff 40 ff 21 ff a3 ff ea ff f8 ff b1 ff 0b ff
0x000000f0: f7 ff de ff 15 ff fd ff 53 ff 77 ff 4b ff e9 ff
0x00000100: 05 ff ca ff d0 ff 38 ff 1c ff fb ff c3 ff 9d ff
0x00000110: 0d ff fb ff ad ff e7 ff 8a ff 4f ff eb ff 6b ff
0x00000120: 8f ff 0c ff 0f ff 79 ff 04 ff c0 ff 85 ff fb ff
0x00000130: 9e ff 9a ff f9 ff f1 ff 11 ff 44 ff da ff 16 ff
0x00000140: 0e ff aa ff 4e ff 2a ff a5 ff 11 ff c7 ff b2 ff
0x00000150: 0d ff 74 ff 99 ff 97 ff c4 ff 85 ff 03 ff 53 ff
0x00000160: 91 ff 12 ff cd ff 96 ff d2 ff 52 ff 91 ff 70 ff
0x00000170: ec ff 8a ff 62 ff fd ff cf ff 3c ff 13 ff dd ff
0x00000180: e7 ff 61 ff 08 ff 8c ff 73 ff cf ff 3f ff 80 ff
0x00000190: 44 ff d8 ff 17 ff 08 ff 5d ff 1a ff 5b ff ef ff
0x000001a0: 2c ff 28 ff 85 ff fe ff 7a ff 16 ff 6f ff 66 ff
0x000001b0: a1 ff d1 ff 63 ff 70 ff 0d ff 76 ff 4d ff f4 ff
0x000001c0: d8 ff 55 ff 81 ff 4b ff 25 ff c0 ff cb ff 69 ff
0x000001d0: 98 ff e2 ff 71 ff f6 ff fd ff cc ff e5 ff 29 ff
0x000001e0: f5 ff 6a ff 28 ff 6f ff 80 ff 97 ff d6 ff 21 ff
0x000001f0: 68 ff 39 ff 91 ff 75 ff b0 ff df ff 6a ff 88 ff
0x00000200: 34 ff eb ff d3 ff 59 ff ab ff 9e ff c2 ff 43 ff
0x00000210: 80 ff 33 ff 39 ff 7d ff 00 ff 1e ff a7 ff f5 ff
0x00000220: 88 ff cf ff 64 ff 09 ff 66 ff 3a ff 2a ff ce ff
0x00000230: 74 ff bc ff 43 ff 24 ff 9b ff ad ff ac ff cf ff
0x00000240: 98 ff 7f ff 29 ff 43 ff 1d ff eb ff 87 ff 9d ff
0x00000250: 1f ff c0 ff 1b ff 1f ff df ff c2 ff 14 ff 67 ff
0x00000260: 91 ff 78 ff 70 ff f7 ff b3 ff 9b ff c5 ff 27 ff
0x00000270: 57 ff 08 ff 4b ff f2 ff b6 ff f7 ff c1 ff 4e ff
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0x00000290: d9 ff 4b ff 14 ff b8 ff 0d ff 28 ff 20 ff 9e ff
0x000002a0: a0 ff 90 ff 95 ff 53 ff 2b ff 5a ff 7a ff 82 ff
0x000002b0: 63 ff c5 ff 74 ff 19 ff bc ff 36 ff 67 ff 32 ff
0x000002c0: 20 ff f9 ff c5 ff f6 ff 12 ff f6 ff eb ff ec ff
0x000002d0: 41 ff ff ff a4 ff 4f ff 27 ff c4 ff ed ff c8 ff
0x000002e0: 55 ff 83 ff 1b ff 80 ff dd ff 96 ff 03 ff 40 ff
0x000002f0: 5b ff 77 ff 59 ff 18 ff ad ff c1 ff 4a ff ce ff
0x00000300: ba ff 10 ff c4 ff cd ff 06 ff b0 ff b9 ff 47 ff
0x00000310: af ff 5d ff 96 ff d7 ff 22 ff 84 ff 9f ff 77 ff
0x00000320: 07 ff ba ff f7 ff e4 ff 50 ff fa ff 25 ff ac ff
0x00000330: 72 ff 7e ff c4 ff 1f ff 3f ff 0e ff ed ff fa ff
0x00000340: 1e ff b2 ff c7 ff 24 ff 62 ff 80 ff 6c ff 11 ff
0x00000350: dd ff 02 ff e8 ff ff ff 86 ff 87 ff 76 ff 8d ff
0x00000360: 42 ff 6e ff 72 ff 92 ff 68 ff 97 ff 3e ff da ff
0x00000370: 15 ff 02 ff fa ff 55 ff 11 ff e7 ff 4f ff 2f ff
0x00000380: 99 ff 16 ff 54 ff fb ff 96 ff c0 ff 0d ff 73 ff
0x00000390: c2 ff f5 ff 73 ff 49 ff 7d ff e9 ff d6 ff bf ff
0x000003a0: 57 ff 48 ff 51 ff c0 ff df ff 90 ff 9a ff f5 ff
0x000003b0: 92 ff 94 ff 4a ff a3 ff 7c ff 99 ff d3 ff 15 ff
0x000003c0: af ff 27 ff 11 ff 45 ff e7 ff 1e ff b8 ff a9 ff
0x000003d0: 13 ff 2b ff f2 ff 90 ff 15 ff c9 ff 4f ff 6c ff
0x000003e0: 11 ff a1 ff 2c ff f1 ff 31 ff c7 ff e6 ff c3 ff
0x000003f0: 5b ff 30 ff 67 ff d7 ff c9 ff 3a ff ed ff 78 ff
0x00000400: 61 ff fe ff bd ff 48 ff 1c ff 75 ff f1 ff 2f ff
0x00000410: a1 ff e4 ff c0 ff b6 ff ad ff 0f ff 22 ff be ff
0x00000420: b0 ff 4f ff af ff e1 ff 16 ff 95 ff a5 ff 71 ff
0x00000430: c5 ff 0c ff 49 ff 8e ff 46 ff 36 ff 06 ff a7 ff
0x00000440: 34 ff c3 ff ef ff 50 ff 39 ff e0 ff 7f ff da ff
0x00000450: c4 ff 3f ff 90 ff 71 ff 4f ff b2 ff 30 ff ff ff
0x00000460: 01 ff df ff e1 ff 17 ff 75 ff 86 ff 89 ff 3a ff
0x00000470: 92 ff d2 ff c9 ff d8 ff 08 ff cf ff 7f ff 3c ff
0x00000480: 93 ff 6e ff 8c ff cc ff 4e ff 0b ff a6 ff 13 ff
0x00000490: 4b ff 36 ff 84 ff 9a ff e8 ff b4 ff 99 ff ea ff
0x000004a0: 94 ff 7a ff 01 ff 09 ff 00 ff 8a ff 43 ff 92 ff
0x000004b0: 5c ff 0c ff 6a ff 64 ff dc ff e9 ff a0 ff 6f ff
0x000004c0: 57 ff 2c ff 3b ff a6 ff 38 ff e1 ff b9 ff 83 ff
0x000004d0: 17 ff 3d ff 1d ff ff ff f2 ff b6 ff e9 ff 86 ff
0x000004e0: 31 ff eb ff 8f ff 31 ff 75 ff d2 ff c4 ff d2 ff
0x000004f0: df ff 2e ff 36 ff bb ff 18 ff d7 ff 2a ff 6f ff
0x00000500: 03 ff 65 ff 15 ff 3b ff 46 ff ce ff be ff 5d ff
0x00000510: 0c ff db ff 5c ff fe ff 92 ff 46 ff 84 ff c3 ff
0x00000520: 31 ff 13 ff f4 ff a6 ff e5 ff b8 ff 78 ff c4 ff
0x00000530: e7 ff af ff 7f ff ff ff 86 ff a9 ff 6e ff 89 ff
0x00000540: 0e ff 84 ff c5 ff 54 ff 52 ff 83 ff b1 ff 5e ff
0x00000550: 5f ff 0e ff 5c ff f1 ff 54 ff e0 ff b4 ff 85 ff
0x00000560: f3 ff a8 ff 2b ff d9 ff 61 ff a4 ff 9d ff 48 ff
0x00000570: 53 ff 1d ff 47 ff d9 ff c6 ff b5 ff 62 ff d5 ff
0x00000580: 39 ff 27 ff 29 ff 8c ff ab ff db ff ea ff 0a ff
0x00000590: e9 ff 47 ff fb ff 3d ff 27 ff af ff c2 ff 1b ff
0x000005a0: 57 ff ed ff f4 ff b8 ff 91 ff 91 ff 00 ff e4 ff
0x000005b0: ae ff 47 ff bd ff 75 ff fd ff 20 ff 4a ff 36 ff
0x000005c0: 47 ff 73 ff c2 ff f2 ff 4e ff ad ff fc ff 37 ff
0x000005d0: f4 ff f7 ff 74 ff 1b ff a6 ff 36 ff 36 ff fe ff
0x000005e0: 24 ff 2a ff b6 ff b5 ff bc ff b7 ff 9a ff 6a ff
0x000005f0: fe ff 57 ff df ff fb ff 77 ff 29 ff 32 ff bf ff
0x00000600: 9d ff f4 ff b1 ff eb ff a1 ff ae ff 23 ff 95 ff
0x00000610: a5 ff 97 ff b1 ff 4c ff ce ff e7 ff 4a ff f2 ff
0x00000620: 12 ff 00 ff a7 ff ce ff b7 ff 41 ff 38 ff b6 ff
0x00000630: 99 ff 18 ff b1 ff 10 ff 41 ff e3 ff cf ff de ff
0x00000640: d8 ff 81 ff ca ff 79 ff 2f ff ed ff 0f ff d4 ff
0x00000650: 84 ff c0 ff 20 ff 52 ff a7 ff 6a ff 44 ff b9 ff
0x00000660: 6b ff ec ff 87 ff 22 ff 2d ff c0 ff d8 ff c6 ff
0x00000670: d8 ff 8a ff d7 ff 19 ff 6d ff a6 ff f8 ff 45 ff
0x00000680: 27 ff c2 ff bf ff 56 ff af ff ce ff 2b ff 33 ff
0x00000690: 8e ff 4b ff 86 ff 35 ff b6 ff ca ff ef ff 21 ff
0x000006a0: b6 ff 76 ff 43 ff e4 ff 36 ff 1c ff aa ff 0e ff
0x000006b0: a6 ff 81 ff 28 ff 13 ff 28 ff 20 ff 59 ff 4f ff
0x000006c0: e2 ff 18 ff a6 ff 91 ff e6 ff d1 ff c4 ff 74 ff
0x000006d0: 1c ff 4a ff a9 ff d2 ff 15 ff 98 ff f3 ff cb ff
0x000006e0: 0f ff 37 ff af ff 45 ff 53 ff 5a ff 54 ff f9 ff
0x000006f0: db ff 7c ff 0c ff 03 ff 9c ff 65 ff 53 ff 7e ff
0x00000700: 7d ff f9 ff 0f ff 63 ff ca ff d3 ff d7 ff e6 ff
0x00000710: 1e ff 81 ff b9 ff 33 ff 19 ff ac ff fe ff 28 ff
0x00000720: e3 ff ae ff 6e ff 36 ff 08 ff c2 ff 2f ff e3 ff
0x00000730: 3e ff 3c ff e7 ff da ff a1 ff 3a ff 58 ff 1f ff
0x00000740: 33 ff 67 ff 82 ff fd ff 3a ff 5a ff e3 ff 58 ff
0x00000750: db ff 9c ff 8b ff f4 ff 49 ff 8a ff 1d ff 2c ff
0x00000760: 38 ff 8b ff 63 ff 40 ff 4d ff 92 ff 23 ff 8b ff
0x00000770: ce ff 0a ff 65 ff 70 ff 44 ff bd ff 8f ff 77 ff
0x00000780: 24 ff 11 ff 74 ff 5e ff 6b ff 58 ff b7 ff 46 ff
0x00000790: f4 ff 42 ff 3b ff 3d ff cc ff 58 ff 6a ff 04 ff
0x000007a0: e3 ff cd ff 44 ff 30 ff 5f ff 68 ff bb ff 2e ff
0x000007b0: 72 ff 20 ff 9e ff b7 ff dd ff 2d ff 2e ff 01 ff
0x000007c0: 3e ff a3 ff 5f ff aa ff fb ff 16 ff f0 ff ef ff
0x000007d0: 59 ff 2b ff 2d ff 25 ff 83 ff 97 ff 2a ff 66 ff
0x000007e0: 64 ff 6e ff 96 ff c3 ff d6 ff 51 ff f1 ff 49 ff
0x000007f0: 71 ff 8f ff 00 ff 4e ff bc ff 2e ff 4f ff fb ff
  OOB Data: d1 ff af ff a5 ff cc ff c5 ff 95 ff bc ff 1e ff
  OOB Data: c1 ff e9 ff 44 ff 44 ff 80 ff 6e ff ab ff e4 ff
  OOB Data: dc ff 41 ff a7 ff b3 ff 93 ff 99 ff fc ff 04 ff
  OOB Data: 28 ff fc ff 53 ff e5 ff 2a ff a2 ff e0 ff fc ff



Regards,
Minal
+91-80-2519-3129