Date: Sun, 3 Nov 2013 00:37:24 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Adrian Chadd <adrian@freebsd.org> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: Overriding sector size on disks? Message-ID: <alpine.BSF.2.00.1311030013210.35317@wonkity.com> 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 Fri, 1 Nov 2013, Adrian Chadd wrote: > Hi! > > I have an odd problem. That, honestly, can't be that odd. > > 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. ISTR some Hitachi external USB disk enclosures do that. Since they are not a general-purpose enclosure but came wrapped around specific Hitachi disks, it's not really their fault. > Because of this, partitions just plainly don't work. > > 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? > 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. Is it out of the question to discard the enclosure as too bugged to use? Otherwise, there is a small chance that the vendor has a firmware update that isn't stupid. Or maybe even a jumper in the enclosure. Reference: http://forum.hddguru.com/viewtopic.php?t=21099&start= has some information which might help.
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