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Disk hardware reporting less than rated capacity

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From: new...@lawshouse.org (Henry Law)
Subject: Disk hardware reporting less than rated capacity
Newsgroups: uk.comp.homebuilt
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by: Henry Law - Mon, 29 Nov 2021 22:58 UTC

I have a hard drive of 500GB capacity. It says so on the outside, and
its device string when read by linux fdisk or parted contains the string
"500".

But lsblk and all partitioning tools report 250GB.

I remember encountering this problem years ago and tracing it to some
obscure setting in the microcode which reduced the reported capacity of
the drive. There was some low-level utility that reset it too. But I've
searched the web until my keyboard is red hot and can find nothing: the
search keeps getting polluted by articles describing how to fix it in the
operating system (hidden files, hidden partitions, all that sort of
stuff). This is nothing to do with the OS: the disk itself is reporting
half its real size.

Can anyone help me find out what causes this, and what the tool is that
fixes it?

--
Henry Law n e w s @ l a w s h o u s e . o r g
Manchester, England

Re: Disk hardware reporting less than rated capacity

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From: mo0...@posteo.de (Marco Moock)
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Subject: Re: Disk hardware reporting less than rated capacity
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by: Marco Moock - Tue, 30 Nov 2021 11:00 UTC

Am Mon, 29 Nov 2021 16:58:52 -0600
schrieb Henry Law <news@lawshouse.org>:

> Can anyone help me find out what causes this, and what the tool is
> that fixes it?

Please specify the exact model you have. Check if it has a jumper for
setting that (some have it).

Re: Disk hardware reporting less than rated capacity

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From: use...@andyburns.uk (Andy Burns)
Newsgroups: uk.comp.homebuilt
Subject: Re: Disk hardware reporting less than rated capacity
Date: Tue, 30 Nov 2021 13:52:49 +0000
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by: Andy Burns - Tue, 30 Nov 2021 13:52 UTC

Henry Law wrote:

> I have a hard drive of 500GB capacity. It says so on the outside, and
> its device string when read by linux fdisk or parted contains the string
> "500".
>
> But lsblk and all partitioning tools report 250GB.

There have been numerous size limit, track limit, head limits, etc over the years

<https://tldp.org/HOWTO/Large-Disk-HOWTO-4.html>

some drives have jumpers to stay just under an applicable limit, what model is it?

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From: new...@lawshouse.org (Henry Law)
Subject: Re: Disk hardware reporting less than rated capacity
Newsgroups: uk.comp.homebuilt
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by: Henry Law - Tue, 30 Nov 2021 14:54 UTC

On Tue, 30 Nov 2021 13:52:49 +0000, Andy Burns wrote:

> some drives have jumpers to stay just under an applicable limit, what
> model is it?

Seagate Barracuda ST3500320AS.

--
Henry Law n e w s @ l a w s h o u s e . o r g
Manchester, England

Re: Disk hardware reporting less than rated capacity

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From: wib...@btinternet.com (David)
Newsgroups: uk.comp.homebuilt
Subject: Re: Disk hardware reporting less than rated capacity
Date: 30 Nov 2021 15:07:06 GMT
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by: David - Tue, 30 Nov 2021 15:07 UTC

On Tue, 30 Nov 2021 08:54:07 -0600, Henry Law wrote:

> On Tue, 30 Nov 2021 13:52:49 +0000, Andy Burns wrote:
>
>> some drives have jumpers to stay just under an applicable limit, what
>> model is it?
>
> Seagate Barracuda ST3500320AS.

https://www.seagate.com/gb/en/support/kb/firmware-update-for-st3500320as-
st3500620as-st3500820as-st3640330as-st3640530as-st3750330as-st3750630as-
st31000340as-207951en/

This was the first search hit.
Not sure what the problem was, but worth checking that you are on the
latest firmware.

Cheers

Dave R

--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

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aus+uk / uk.comp.homebuilt / Disk hardware reporting less than rated capacity

Subject	Author
Disk hardware reporting less than rated capacity	Henry Law
Re: Disk hardware reporting less than rated capacity	Marco Moock
Re: Disk hardware reporting less than rated capacity	Andy Burns
Re: Disk hardware reporting less than rated capacity	Henry Law
Re: Disk hardware reporting less than rated capacity	David