How can I determine the sector size on an external hard drive?
wmic partition get BlockSize, StartingOffset, Name, Index from a Windows Command Prompt. The output looks like:
BlockSize Index Name StartingOffset 512 0 Disk #0, Partition #0 1048576 512 1 Disk #0, Partition #1 105906176 512 0 Disk #1, Partition #0 32256
Where block size is the drive's sector size. It unfortunately doesn't list the drive letter.
Also as I understand the article, the drive will still list that it has 512 byte sectors even though internally it uses 4kb sectors. So the only way may be to get the drive's spec sheet.
I just verified this with WMIC on my windows XP box. This is the query:
C:\>wmic DISKDRIVE get bytespersector, caption BytesPerSector Caption 512 WDC WD1600AAJS-60M0A0 4096 TrekStor HDD USB Device
The newer Toshiba external disk is reported as 4096 bytes.
I know that you dont use linux, but just for the record:
smartctl -i /dev/...
Sector Size: 512 bytes logical/physical