Date: Fri, 12 Sep 2014 09:17:19 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Willem Jan Withagen" <wjw@digiware.nl>, "Peter Wemm" <peter@wemm.org>, <freebsd-stable@freebsd.org> Cc: Andriy Gapon <avg@freebsd.org>, Aristedes Maniatis <ari@ish.com.au> Subject: Re: getting to 4K disk blocks in ZFS Message-ID: <EC1EE440B161449CA1A578DBCCEEA274@multiplay.co.uk> References: <540FF3C4.6010305@ish.com.au> <A0A549F7A4094F519A3660697AB4983F@multiplay.co.uk> <54114029.3060507@FreeBSD.org> <2128347.Ah5i0RTCvp@overcee.wemm.org> <541230F1.3060402@digiware.nl>
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----- Original Message -----
From: "Willem Jan Withagen" <wjw@digiware.nl>
> On 11-9-2014 19:49, Peter Wemm wrote:
>>> Another downside is 1/4th of uberblocks, 32 vs 128.
>>> Also, automatic sector size detection works great for me and I've never had
>>> a need to manually tweak ashift.
>>
>> Unfortunately, I have. Same drive connected two different ways:
>>
>> da12 at mps1 bus 0 scbus1 target 11 lun 0
>> da12: <ATA ST4000VN000-1H41 SC43> Fixed Direct Access SCSI-6 device
>> da12: 600.000MB/s transfers
>> da12: Command Queueing enabled
>> da12: 3815447MB (7814037168 512 byte sectors: 255H 63S/T 486401C)
>>
>> ada1 at ahcich1 bus 0 scbus3 target 0 lun 0
>> ada1: <ATA ST4000VN000-1H41 SC43> ATA-8 SATA 3.x device
>> ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
>> ada1: Command Queueing enabled
>> ada1: 3815447MB (7814037168 512 byte sectors: 16H 63S/T 16383C)
>> ada1: quirks=0x1<4K>
>>
>> The 4k flag is missing when it's on the sas controller. The Ident strings are
>> changed.
>>
>> This came up elsewhere recently.
>
> I reported the same fact for the new set of WD REDs I installed.
> Seems that ada and da have different quirks tables...
> So disks on SATA connectors on the motherboard are diagnosed as being 4Kb.
> The disks on my twa don't get the quirk and are considered 512b
LMK the ident strings and I'll look to update the quirks tables.
Regards
Steve
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