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Date:      Sun, 4 Jun 2017 08:48:51 +0100 (BST)
From:      andy thomas <andy@time-domain.co.uk>
To:        Zaphod Beeblebrox <zbeeble@gmail.com>
Cc:        freebsd-fs <freebsd-fs@freebsd.org>
Subject:   Re: Is it Geom, the mfi driver or the HBA?
Message-ID:  <Pine.GSO.4.64.1706040842010.17205@mail0.time-domain.co.uk>
In-Reply-To: <CACpH0McEMzR_Emunhs-Vn25Sc%2B8ZKhg-CuuqYbYwaaPCYq9k=w@mail.gmail.com>
References:  <CACpH0McEMzR_Emunhs-Vn25Sc%2B8ZKhg-CuuqYbYwaaPCYq9k=w@mail.gmail.com>

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Is the MFI HBA in a Dell PowerEdge R410 or similar 11th generation server? 
These HBA's see all disks above 2 TB size as 2 TB disks - it's a 
limitation of the HBA firmware. So any O/S is limited to 2 TB max disk 
size with this controller although a firmware update may be availabe that 
supports larger disks.

Andy

On Sun, 4 Jun 2017, Zaphod Beeblebrox wrote:

> So... when I put a drive in my USB enclosure, it shows up as a 4T drive,
> but when I attach it to my mfi-driver card, it shows up as 2T.  Not the
> size that 2T drives commonly are (which is 1.8T), but 2T.
>
> (BTW... mfi is in passs-thru mode)
>
> So... how the world sees this drive:
>
> da6 at mfi0 bus 0 scbus4 target 6 lun 0
> da6: <ATA ST4000DM005-2DP1 0001> Fixed Direct Access SPC-3 SCSI device
> da6: Serial Number ZDH1BN4H
> da6: 150.000MB/s transfers
> da6: Command Queueing enabled
> da6: 2097151MB (4294967294 512 byte sectors)
> da6: quirks=0x8<4K>
>
> but:
>
> [1:46:346]root@vr:~> camcontrol identify da6 | grep LBA48
> LBA48 supported       7814037168 sectors
>
> yet
>
> is there a quirk to correct this?  If camcontrol sees 4T, why doesn't it
> probe as 4T?
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