# sudo mkfs -t vfat /dev/sdb1
mkfs.fat 3.0.26 (2014-03-07)
mkfs.vfat: unable to open /dev/sdb1: Read-only file system

sudo hdparm -r0 /dev/sdb1

Start cluster field in VFAT long filename slot is not 0 (but 0xdb2c).
1: Fix.
2: Leave it.
? 1
Unfinished long file name "쀸雉梆Ồ궏꾧썏ᔘ钾꾲彪Ꮦ".
  (Start may have been overwritten by ─Σæ#)
1: Delete LFN
2: Leave it as it is.
3: Fix numbering (truncates long name and attaches it to short name ─Σæ#)
? 1
Reserved field in VFAT long filename slot is not 0 (but 0xdc).
1: Fix.
2: Leave it.
? 1
Start cluster field in VFAT long filename slot is not 0 (but 0xdb2c).
1: Fix.
2: Leave it.
? 1
Unfinished long file name "쀸雉梆Ồ궏꾧썏ᔘ钾꾲彪Ꮦ".
  (Start may have been overwritten by ─Σæ#)
1: Delete LFN
2: Leave it as it is.
3: Fix numbering (truncates long name and attaches it to short name ─Σæ#)
? 1
Reserved field in VFAT long filename slot is not 0 (but 0xdc).
1: Fix.
2: Leave it.
? 1
Start cluster field in VFAT long filename slot is not 0 (but 0xdb2c).
1: Fix.
2: Leave it.
? 1
Unfinished long file name "쀸雉梆Ồ궏꾧썏ᔘ钾꾲彪Ꮦ".
  (Start may have been overwritten by ─Σæ#)
1: Delete LFN
2: Leave it as it is.
3: Fix numbering (truncates long name and attaches it to short name ─Σæ#)
? 1
/SEKAHR2/SEKHAR/Sekhar/English/Spoken English/Vasundra/All/AB
  Has a large number of bad entries. (948/1008)
Drop directory ? (y/n)
1
Invalid input.
Drop directory ? (y/n) 1
Invalid input.
Drop directory ? (y/n) 1
Invalid input.
Drop directory ? (y/n) y
1


Read 32 bytes at 283836416:Input/output error