mpt(4) cuts 3TiB drives down to 2TiB

Matthew Jacob mj at feral.com
Mon May 9 00:37:05 UTC 2011


> 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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