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WD Elements USB HDD


I use a 4 TB WD Elements USB HDD (USB PID: 107C )
EAN: 7 18037 82492 5
with MBR and one 4TB NTFS Partition.
Logical sector size is 4096 Byte.

Now I bought a 4 TB WD Elements USB HDD (USB PID: 25A3).
Identical EAN: 7 18037 82492 5
and Model: WDBWLG0040HBK-EESN.
But logical sector size is 512 Byte.

How can I change logical sector size from 512 Byte to 4096 Byte?
My application requires 4096 Byte logische sector size.

Tue, 09 May 2017 08:13:14 -0700

The two hard drive looks the same, just formatted differently. You didn't specify what operating system you are using. But if you use Windows, you just have to reformat the hard drive using a different sector size.

In Windows, right click on the drive and click on "Format...". Then you can select the "Allocation unit size" as shown in the screen shot below.

Attached Image:

Format Dialog.png

Tue, 09 May 2017 19:40:47 -0700

thanks,I am using linux ubuntu.I want to be able to read and write the drive under Windows XP.Therefore a MBR is required.Windows XP dows not show the 512 Byte drive.
Formatting under Windows defines the cluster size not the sector size:

WD Elements 107C USB Device (4096 Byte Drive) shows:

[email protected]:~$ df
Dateisystem 1K‐Blöcke Benutzt Verfügbar Ben% Eingehängt auf
/dev/sda3 25803068 11586212 12906136 48% /
none 1850720 700 1850020 1% /dev
none 1857340 1368 1855972 1% /dev/shm
none 1857340 84 1857256 1% /var/run
none 1857340 0 1857340 0% /var/lock
/dev/sdc1 3906983932 3906114436 869496 100% /media/Elements
[email protected]:~$ sudo fdisk -l /dev/sdc
Hinweis: Die Sektorgröße ist 4096 (nicht 512)

Platte /dev/sdc: 4000.8 GByte, 4000752599040 Byte
255 Köpfe, 63 Sektoren/Spur, 60799 Zylinder
Einheiten = Zylinder von 16065 × 4096 = 65802240 Bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xd6f9eb72

Gerät boot. Anfang Ende Blöcke Id System
/dev/sdc1 1 60800 3906983936 7 HPFS/NTFS


WD Elements 25A3 USB Device (512 Byte Drive) shows:

[email protected]:~$ sudo fdisk -l /dev/sdc

WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted.

Platte /dev/sdc: 4000.8 GByte, 4000752599040 Byte
256 Köpfe, 63 Sektoren/Spur, 484497 Zylinder
Einheiten = Zylinder von 16128 × 512 = 8257536 Bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x16f2a91f

Gerät boot. Anfang Ende Blöcke Id System
/dev/sdc1 1 266306 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.

Wed, 10 May 2017 06:04:17 -0700

Couldn't you use Windows Disk Management to re-partition the drive? Like delete its existing partitions and then creating a new partition?

It sounds like you took the drive out of the enclosure. In some cases, the USB adapter remaps the sectors. There is a thread talking about it here: Toshiba Canvio Desktop External Hard Drive Disassembly

Wed, 10 May 2017 19:31:35 -0700

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