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Date:      Sat, 2 Nov 2013 11:12:06 -0500
From:      Mark Felder <feld@FreeBSD.org>
To:        Adrian Chadd <adrian@freebsd.org>
Cc:        freebsd-current <freebsd-current@freebsd.org>
Subject:   Re: Overriding sector size on disks?
Message-ID:  <AFA9B599-0F0F-49B0-A29B-C020622EA0B5@FreeBSD.org>
In-Reply-To: <CAJ-VmonDc3QuKKqE6b=FmOy%2Btz6J8AYpXtHon5EWR_3dTiePww@mail.gmail.com>
References:  <CAJ-VmonDc3QuKKqE6b=FmOy%2Btz6J8AYpXtHon5EWR_3dTiePww@mail.gmail.com>

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On Nov 1, 2013, at 9:45 PM, Adrian Chadd <adrian@freebsd.org> wrote:

> Hi!
>=20
> I have an odd problem. That, honestly, can't be that odd.
>=20
> I have a bunch of SATA disks that when plugged into the laptop
> directly, show up as 512 byte sectors. But if I plug it in via this
> iomega USB caddy, they show up as 4k sector devices.
>=20
> Because of this, partitions just plainly don't work.
>=20
> Has anyone faced this? Is there some trick to do to get these things
> to go back to being 512 byte sector devices so one can use them?
>=20
> Similarly, because they show up as 512 byte sector devices on
> macosx/linux, they can read/write NTFS/MSDOS partitions on the thing.
> But if I plug it into freebsd, it shows up as a 4k sector device and
> things plainly don't work.
>=20
> Thanks!
>=20
>=20

My coworker ran into this once. We couldn=92t find a workaround. We just =
noted that we either had to use the disk with the adapter or without =97 =
you cannot swap between and expect to read your data.=



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