Date: Sun, 08 May 2011 17:37:03 -0700 From: Matthew Jacob <mj@feral.com> To: freebsd-scsi@freebsd.org Subject: Re: mpt(4) cuts 3TiB drives down to 2TiB Message-ID: <4DC7372F.9090204@feral.com> In-Reply-To: <20110508232405.GA84267@nargothrond.kdm.org> References: <alpine.BSF.2.00.1105081401080.92495@gw.reifenberger.com> <BANLkTikGH6iDLZTztxg13qzxPiazQ5VYBA@mail.gmail.com> <20110508232405.GA84267@nargothrond.kdm.org>
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> I have heard from a friend (i.e. I haven't personally confirmed) that the > capacity truncation only applies to SATA drives. If you attach a 3TB SAS > drive, you should be able to see the full capacity. > > It makes some sense, since the LSI controller is translating SCSI to SATA, > but for SAS drives it just passes the SCSI commands straight through to the > drive. So the 16 byte READ CAPACITY, READ and WRITE commands will make it > through to SAS disks, but aren't translated for SATA disks. > > Ken That's preposterous. LBA48 has been around forever and even SATL 1.0 covered this. Shrug.
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