Advance Format 512e With 4k Sector Size?

May 19, 2014 at 09:01:51
Specs: Windows XP x64, i5-3570
Hello my hard drive is Toshiba DT01ACA300 3TB which is in Advance Format with 512e. I installed it. HD tune shows 3TB capacity. But the problem is that it shows drive as having 512 bytes sector. How can I tell my drive not to emulate it as 512 but to get 4k sector?

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May 19, 2014 at 09:04:18
And one more thing, I did no OS installation on it. It is only for data.

Partition is GPT.

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May 19, 2014 at 09:34:45
512 bytes is standard on all IDE hard disks That include both PATA and SATA hard disks. The Sector size is determined by the low level format that is done by the manufacturer and there is nothing the user can do to change it.

What you can have if a 4K cluster (8 sectors) which is standard for NTFS up to 16 TBs


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May 19, 2014 at 14:13:10
"512 bytes is standard on all IDE hard disks That include both PATA and SATA hard disks."

I believe that is not accurate as Advanced Format disks have sectors 4096 bytes in size. However, it is true that you can't change the size of the sectors, nor is there any reason to do so. The 512e means that the disk will present, through an emulation layer, 512-byte sectors to an operating system that doesn't understand the 4096-byte sectors. This results in a performance loss. Use a modern operating system, not something out of the Ark, to get the best performance from a modern hard disk.

message edited by ijack

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May 19, 2014 at 15:19:31
I suspect what he's getting at is how the OS sees the sectors as 512B, because it's been the standard for so long it's kinda baked into the OS. More technical details from an MS perspective here:

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May 19, 2014 at 23:07:14
Baked into outdated versions of Windows, certainly, but good modern OSs see the 4096-byte sectors and handle them natively. Yet another reason to stop using a pesioned-off OS with modern hardware.

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May 19, 2014 at 23:49:40
Ok I also went into some reading...


According to a forum someone reported that windows 8.x shows up 512 when the Seagate AF 512e is plug into the motherboard.

But when the seagate is used in an external USB disk it shows Vista was able to see 4096 bytes per sector which is fine for an older OS.

Has anyone knows of what drives brands/models when plug internally into (sata 3.0) can see 4096 byte per sector in windows 8? Please let me know so I can upgrade my OS.

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