Brand New 64GB Ultra MicroSD showing 2TiB in Linux!

Hi,
This is my first Forum post.
I have MicroSD 64GB class 10.
I use 2 PC

  1. Ubuntu 14.04 LTS 64 Bit
  2. Centos 5.0 LTS 32 Bit

On both i run few commands for cross verify the SD card working proper or not.
Commands as follows:-

  1. For Ubuntu
        1.gdisk -l /dev/sdb
        2.fdisk -l
        3.sudo parted /dev/sdb unit s print
        4.sfdisk -l -uM
        5.lsblk
        6.blkid
        7.dmesg |grep sdb
        8.cfdisk /dev/sdb

  2. For Centos
    gdisk -l /dev/sdb
    fdisk -l
    sudo parted /dev/sdb unit s print
    sfdisk -l -uM
    dmesg |grep sdb

For cross verification i use different Card Readers
1.http://hongkongheya.en.alibaba.com/product/296666147-209833623/USB_Memory_Card_reader_HY_539.html
2.http://www.flipkart.com/digitek-dcr-002-card-reader/p/itmdqhuhuzwkcge9

I got Observations as follows:-

  1. When i use 1st card reader with any OS, i can see 2.0TiB is totle size of card.
  2. When i use 2nd card reader with any OS, i can see two warnings as follows:-
        1. Secondary partition table overlaps the last partition by 33 blocks!
        2.Warning: The partition table looks like it was made for C/H/S=*/255/63 (instead of 60906/64/32).

Results which i get by using commands as follow:-
1.1. For ubuntu by using 1st card Reader for 1st command:-
root@DTP233:~# gdisk -l /dev/sdb
GPT fdisk (gdisk) version 0.8.8

Warning! Read error 5; strange behavior now likely!
Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present

***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************

Disk /dev/sdb: 4285485056 sectors, 2.0 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): E1630C27-F259-4C20-840C-0ADF3D857F54
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 4285485022
Partitions will be aligned on 2048-sector boundaries
Total free space is 4160782269 sectors (1.9 TiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1           32768       124735487   59.5 GiB    0700  Microsoft basic data
root@DTP233:~# gdisk -l /dev/sdb1
GPT fdisk (gdisk) version 0.8.8

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present

***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************

Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’
Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’
Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’
Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’

Warning! Secondary partition table overlaps the last partition by
8094685705 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sdb1: 124702720 sectors, 59.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 4E9D9558-33A3-415F-BA24-F4134CB4692E
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 124702686
Partitions will be aligned on 4-sector boundaries
Total free space is 124702653 sectors (59.5 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
   2      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
   3      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
   4      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
root@DTP233:~#

1.2. For ubuntu by using 2nd card Reader for 1st command:-
root@DTP233:~# gdisk -l /dev/sdb
GPT fdisk (gdisk) version 0.8.8

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present

***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************

Warning! Secondary partition table overlaps the last partition by
33 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sdb: 124735488 sectors, 59.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 71A320C3-65D3-4911-AECD-D2EF6F640C2F
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 124735454
Partitions will be aligned on 2048-sector boundaries
Total free space is 32734 sectors (16.0 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1           32768       124735487   59.5 GiB    0700  Microsoft basic data
root@DTP233:~# gdisk -l /dev/sdb1
GPT fdisk (gdisk) version 0.8.8

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present

***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************

Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’
Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’
Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’
Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’

Warning! Secondary partition table overlaps the last partition by
8094685705 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sdb1: 124702720 sectors, 59.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): B9B0E437-047C-4E99-A28B-743AA0F62D65
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 124702686
Partitions will be aligned on 4-sector boundaries
Total free space is 124702653 sectors (59.5 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
   2      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
   3      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
   4      4109694196      8219388391   1.9 TiB     8300  Linux filesystem

2.1. For ubuntu by using 1st card Reader for 2nd command:-
fdisk -l

Disk /dev/sdb: 2194.2 GB, 2194168348672 bytes
255 heads, 63 sectors/track, 266759 cylinders, total 4285485056 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1           32768   124735487    62351360    7  HPFS/NTFS/exFAT

2.2. For ubuntu by using 2nd card Reader for 2nd command:-
fdisk -l

Disk /dev/sdb: 63.9 GB, 63864569856 bytes
255 heads, 63 sectors/track, 7764 cylinders, total 124735488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1           32768   124735487    62351360    7  HPFS/NTFS/exFAT

3.1. For ubuntu by using 1st card Reader for 3rd command:-
root@DTP233:~# sudo parted /dev/sdb unit s print
Model: USB2.0 CARD-READER (scsi)
Disk /dev/sdb: 4285485056s
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End         Size        Type     File system  Flags
 1      32768s  124735487s  124702720s  primary

root@DTP233:~#
3.2. For ubuntu by using 2nd card Reader for 3rd command:-
root@DTP233:~# sudo parted /dev/sdb unit s print
Model: Mass Storage Device (scsi)
Disk /dev/sdb: 124735488s
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End         Size        Type     File system  Flags
 1      32768s  124735487s  124702720s  primary

4.1. For ubuntu by using 1st card Reader for 4th command:-
sfdisk -l -uM

Disk /dev/sdb: 266759 cylinders, 255 heads, 63 sectors/track
Units = mebibytes of 1048576 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start   End    MiB    #blocks   Id  System
/dev/sdb1        16  60905  60890   62351360    7  HPFS/NTFS/exFAT
/dev/sdb2         0      -      0          0    0  Empty
/dev/sdb3         0      -      0          0    0  Empty
/dev/sdb4         0      -      0          0    0  Empty

4.2. For ubuntu by using 2nd card Reader for 4th command:-
sfdisk -l -uM
Disk /dev/sdb: 60906 cylinders, 64 heads, 32 sectors/track
Warning: The partition table looks like it was made
  for C/H/S=*/255/63 (instead of 60906/64/32).
For this listing I’ll assume that geometry.
Units = mebibytes of 1048576 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start   End    MiB    #blocks   Id  System
/dev/sdb1        16  60905  60890   62351360    7  HPFS/NTFS/exFAT
/dev/sdb2         0      -      0          0    0  Empty
/dev/sdb3         0      -      0          0    0  Empty
/dev/sdb4         0      -      0          0    0  Empty

5.1. For ubuntu by using 1st card Reader for 5th command:-
lsblk

NAME    MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sdb       8:16   1     2T  0 disk
└─sdb1    8:17   1  59.5G  0 part
sr0      11:0    1  1024M  0 rom  
root@DTP233:~#

5.2. For ubuntu by using 2nd card Reader for 5th command:-
lsblk

NAME    MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sdb       8:16   1  59.5G  0 disk
└─sdb1    8:17   1  59.5G  0 part
sr0      11:0    1  1024M  0 rom

6.1. For ubuntu by using 1st card Reader for 6th command:-
blkid
/dev/sdb1: UUID=“3739-3062” TYPE=“exfat”

6.2. For ubuntu by using 2nd card Reader for 6th command:-
blkid
/dev/sdb1: UUID=“3739-3062” TYPE=“exfat”

7.1. For ubuntu by using 1st card Reader for 7th command:-
root@DTP233:~# dmesg |grep sd
[21199.297615] sd 7:0:0:0: Attached scsi generic sg2 type 0
[21199.310106] sd 7:0:0:0: [sdb] Attached SCSI removable disk
[21199.337064] sd 7:0:0:0: [sdb] 4285485056 512-byte logical blocks: (2.19 TB/1.99 TiB)
[21199.343082] sd 7:0:0:0: [sdb] No Caching mode page found
[21199.343091] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[21199.359060] sd 7:0:0:0: [sdb] No Caching mode page found
[21199.359068] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[21199.376091]  sdb: sdb1
[21385.122149] sd 7:0:0:0: [sdb] Unhandled error code
[21385.122157] sd 7:0:0:0: [sdb]  
[21385.122165] sd 7:0:0:0: [sdb] CDB:
[21385.122182] end_request: I/O error, dev sdb, sector 4285484928
[21385.122188] Buffer I/O error on device sdb, logical block 535685616
[21571.170242] sd 7:0:0:0: [sdb] Unhandled error code
[21571.170249] sd 7:0:0:0: [sdb]  
[21571.170257] sd 7:0:0:0: [sdb] CDB:
[21571.170274] end_request: I/O error, dev sdb, sector 4285485048
[21571.170281] Buffer I/O error on device sdb, logical block 535685631
[21757.154337] sd 7:0:0:0: [sdb] Unhandled error code
[21757.154345] sd 7:0:0:0: [sdb]  
[21757.154353] sd 7:0:0:0: [sdb] CDB:
[21757.154371] end_request: I/O error, dev sdb, sector 4285485048
[21757.154378] Buffer I/O error on device sdb, logical block 535685631
[21943.138425] sd 7:0:0:0: [sdb] Unhandled error code
[21943.138431] sd 7:0:0:0: [sdb]  
[21943.138439] sd 7:0:0:0: [sdb] CDB:
[21943.138456] end_request: I/O error, dev sdb, sector 4285485048
[21943.138463] Buffer I/O error on device sdb, logical block 535685631
root@DTP233:~#
7.2. For ubuntu by using 2nd card Reader for 7th command:-
Forgot to take log related to dmesg

Results from CentOS

[root@dtp016 ~]# fdisk -l
Disk /dev/sda: 63.8 GB, 63864569856 bytes
255 heads, 63 sectors/track, 7764 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               3        7765    62351360    7  HPFS/NTFS
[root@dtp016 ~]#
[root@dtp016 ~]# gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.6.10

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present

***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format.
***************************************************************

Warning! Secondary partition table overlaps the last partition by
33 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sda: 124735488 sectors, 59.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 14C366A2-9905-4D31-90FF-85EE02A0B49A
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 124735454
Partitions will be aligned on 2048-sector boundaries
Total free space is 32734 sectors (16.0 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1           32768       124735487   59.5 GiB    0700  Linux/Windows data
[root@dtp016 ~]# gdisk -l /dev/sda1
GPT fdisk (gdisk) version 0.6.10

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present

***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format.
***************************************************************

Exact type match not found for type code F400; assigning type code for
‘Linux/Windows data’
Exact type match not found for type code F400; assigning type code for
‘Linux/Windows data’
Exact type match not found for type code F400; assigning type code for
‘Linux/Windows data’
Exact type match not found for type code F400; assigning type code for
‘Linux/Windows data’

Warning! Secondary partition table overlaps the last partition by
8094685705 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sda1: 124702720 sectors, 59.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 044E2601-E792-4EAD-B972-0DFAEE69B5E5
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 124702686
Partitions will be aligned on 4-sector boundaries
Total free space is 124702653 sectors (59.5 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1      4109694196      8219388391   1.9 TiB     0700  Linux/Windows data
   2      4109694196      8219388391   1.9 TiB     0700  Linux/Windows data
   3      4109694196      8219388391   1.9 TiB     0700  Linux/Windows data
   4      4109694196      8219388391   1.9 TiB     0700  Linux/Windows data
[root@dtp016 ~]#
[root@dtp016 ~]# sudo parted /dev/sda unit s print

Model: Mass Storage Device (scsi)
Disk /dev/sda: 124735487s
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End         Size        Type     File system  Flags
 1      32768s  124735487s  124702720s  primary                    

Information: Don’t forget to update /etc/fstab, if necessary.             

[root@dtp016 ~]#
[root@dtp016 ~]# sfdisk -l -uM
Disk /dev/sda: 60906 cylinders, 64 heads, 32 sectors/track
Warning: The partition table looks like it was made
  for C/H/S=*/255/63 (instead of 60906/64/32).
For this listing I’ll assume that geometry.
Units = mebibytes of 1048576 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start   End    MiB    #blocks   Id  System
/dev/sda1        16  60905  60890   62351360    7  HPFS/NTFS
/dev/sda2         0      -      0          0    0  Empty
/dev/sda3         0      -      0          0    0  Empty
/dev/sda4         0      -      0          0    0  Empty
[root@dtp016 ~]#

I posted email for this to support team, but they only provide replacement, not providing me scintific reason!
If any one try to solve this mystrious behaviour of SD card then its very helpful.
Thanks.

:smiley:   Hi khiremandar,

Dear member of SanDisk Community, welcome.

Friend, please:

1-  Test your MicroSD 64GB c10, in other laptops, directly to its port-card (not USB card-reader).

      Also, see what capacity and format, shows.

2-   Use only , USB card-reader of brand, of high quality (SanDisk, Kingston, Lexar, Samsung, etc).

      Because most and cheap (as those you used) are junk, not have the chip, check it yourself.

See link: http://forums.sandisk.com/t5/Mobile-memory-professional-cards/Micro-SD-Adapter-needed-to-unlock-write-protection-on-micro-SD/m-p/323920#M3218

3-   Try formatting with the tool (portable app, free): USB Flash SD Formatter 4.00, Portable app, free.
      Then remove and re-plug the card.

 Luck.

Regards, Alfred.                                                             (Google translated)

:smiley:    Hi khiremandar,

In addition:

For cross verification i use different Card Readers  ]

Friend, sorry, _you have card SDXC _, but in the models you sample (extremely cheap …) not seen, the _ SDXC logo compatibility and certification _ (neither in specifications).

Are useless…

Regards, Alfred.                                                                       (Google translated)

Thanks Cacho,

As you write, i not seen SDXC & use card Reader which for SDHC & not Branded.

So i use now http://in.transcend-info.com/Products/No-331

by this card reader i take few logs using few commands as follows:-

  1. gdisk -l /dev/sdc

  2. gdisk -l /dev/sdc1

  3. fdisk -l

  4. sudo parted /dev/sdc unit s print

  5. sfdisk -l -uM

  6. lsblk

  7. blkid

  8. dmesg

  9. e2fsck -f -v -C 0 /dev/sdc

output as follows:-

  1. gdisk -l /dev/sdc

gdisk -l /dev/sdc

GPT fdisk (gdisk) version 0.8.8

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present

***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************

Warning! Secondary partition table overlaps the last partition by
33 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sdc: 124735488 sectors, 59.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 2558C347-8B43-478F-80BA-BADCF5FFA7D4
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 124735454
Partitions will be aligned on 2048-sector boundaries
Total free space is 32734 sectors (16.0 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1           32768       124735487   59.5 GiB    0700  Microsoft basic data

  1. gdisk -l /dev/sdc1

gdisk -l /dev/sdc1

GPT fdisk (gdisk) version 0.8.8

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present

***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************

Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’
Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’
Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’
Exact type match not found for type code F400; assigning type code for
‘Linux filesystem’

Warning! Secondary partition table overlaps the last partition by
8094685705 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sdc1: 124702720 sectors, 59.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): C23649B4-54A7-4B38-AF99-40D11FB4C848
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 124702686
Partitions will be aligned on 4-sector boundaries
Total free space is 124702653 sectors (59.5 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
   2      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
   3      4109694196      8219388391   1.9 TiB     8300  Linux filesystem
   4      4109694196      8219388391   1.9 TiB     8300  Linux filesystem

  1. fdisk -l

fdisk -l

Disk /dev/sdc: 63.9 GB, 63864569856 bytes
255 heads, 63 sectors/track, 7764 cylinders, total 124735488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1           32768   124735487    62351360    7  HPFS/NTFS/exFAT

  1. sudo parted /dev/sdc unit s print

sudo parted /dev/sdc unit s print

Model: Generic STORAGE DEVICE (scsi)
Disk /dev/sdc: 124735488s
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End         Size        Type     File system  Flags
 1      32768s  124735487s  124702720s  primary

  1. sfdisk -l -uM

sfdisk -l -uM

Disk /dev/sdc: 60906 cylinders, 64 heads, 32 sectors/track
Warning: The partition table looks like it was made
  for C/H/S=*/255/63 (instead of 60906/64/32).
For this listing I’ll assume that geometry.
Units = mebibytes of 1048576 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start   End    MiB    #blocks   Id  System
/dev/sdc1        16  60905  60890   62351360    7  HPFS/NTFS/exFAT
/dev/sdc2         0      -      0          0    0  Empty
/dev/sdc3         0      -      0          0    0  Empty
/dev/sdc4         0      -      0          0    0  Empty

  1. lsblk

lsblk

NAME    MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sdc       8:32   1  59.5G  0 disk
└─sdc1    8:33   1  59.5G  0 part
sr0      11:0    1  1024M  0 rom  

  1. blkid

/dev/sdc1: UUID=“3739-3062” TYPE=“exfat”

  1. dmesg

dmesg

[6396.240036] usb 1-7: new high-speed USB device number 20 using ehci-pci
[6396.375281] usb 1-7: New USB device found, idVendor=8564, idProduct=4000
[6396.375287] usb 1-7: New USB device strings: Mfr=3, Product=4, SerialNumber=5
[6396.375292] usb 1-7: Product: Transcend   
[6396.375296] usb 1-7: Manufacturer: TS-RDF8
[6396.375300] usb 1-7: SerialNumber: 000000082
[6396.375853] usb-storage 1-7:1.0: USB Mass Storage device detected
[6396.376708] scsi11 : usb-storage 1-7:1.0
[6397.376941] scsi 11:0:0:0: Direct-Access     Generic  STORAGE DEVICE   TS26 PQ: 0 ANSI: 6
[6397.377557] scsi 11:0:0:1: Direct-Access     Generic  STORAGE DEVICE   TS26 PQ: 0 ANSI: 6
[6397.378175] scsi 11:0:0:2: Direct-Access     Generic  STORAGE DEVICE   TS26 PQ: 0 ANSI: 6
[6397.378600] sd 11:0:0:0: Attached scsi generic sg2 type 0
[6397.378913] sd 11:0:0:1: Attached scsi generic sg3 type 0
[6397.379194] sd 11:0:0:2: Attached scsi generic sg4 type 0
[6397.690162] sd 11:0:0:1: [sdc] 124735488 512-byte logical blocks: (63.8 GB/59.4 GiB)
[6397.693661] sd 11:0:0:1: [sdc] Write Protect is off
[6397.693665] sd 11:0:0:1: [sdc] Mode Sense: 21 00 00 00
[6397.697179] sd 11:0:0:1: [sdc] Write cache: disabled, read cache: enabled, doesn’t support DPO or FUA
[6397.700303] sd 11:0:0:0: [sdb] Attached SCSI removable disk
[6397.701799] sd 11:0:0:2: [sdd] Attached SCSI removable disk
[6397.708821]  sdc: sdc1
[6397.719054] sd 11:0:0:1: [sdc] Attached SCSI removable disk
[6463.293960] JFS: nTxBlock = 8192, nTxLock = 65536
[6463.388882] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled
[6522.834766] perf samples too long (5007 > 5000), lowering kernel.perf_event_max_sample_rate to 25000

  1. e2fsck -f -v -C 0 /dev/sdc

e2fsck -f -v -C 0 /dev/sdc

e2fsck 1.42.9 (4-Feb-2014)
ext2fs_open2: Bad magic number in super-block
e2fsck: Superblock invalid, trying backup blocks…
e2fsck: Bad magic number in super-block while trying to open /dev/sdc

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem.  If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 <device>
 or
    e2fsck -b 32768 <device>

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Question is now i use ‘USB card-reader of brand, of high quality’ as per your comment

’2-   Use only , USB card-reader of brand, of high quality (SanDisk, Kingston, Lexar, Samsung, etc).

      Because most and cheap (as those you used) are junk, not have the chip, check it yourself.’

Then also it showing me warning & Error & specially 1.9TiB four times.

Note:- I take SD card as replacement & never formated by me. Just bring SD card from Service Center & cross verifing.

Please give me Help.

:smiley:   Hi khiremandar,

Well, friend I congratulate you.

Contact _ SanDisk Technical Support _ who will replace the device if it’s authentic and is within warranty.

Link: http://www.sandisk.com/about-sandisk/contact-us/

Regards, Alfred.                                                                      (Google translated)