Date: Mon, 1 Sep 2014 16:44:00 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Borja Marcos" <borjam@sarenet.es>, "FreeBSD-scsi" <freebsd-scsi@freebsd.org> Subject: Re: Samsung 840 Pro SSD and quirks Message-ID: <D8A848BC8761493EA5A049BFA77852CF@multiplay.co.uk> References: <A04E6D4A-907E-45AB-9668-0BF6827FD178@sarenet.es>
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We saw a noticable performance increase on 4k on our 8TB 840
array but I too couldn't find any concrete information either.
If anyone has this info and can confirm either way that would
be great.
Regards
Steve
----- Original Message -----
From: "Borja Marcos" <borjam@sarenet.es>
>
> Hi,
>
> I have just noticed that the Samsung 840 SSDs now have the 4 KB block
> quirk added.
>
> Is this really the case? I've been playing with them some time ago and
> I didn't notice performance differences between using ZFS on them
> either
> "directly" (advertised 512 byte blocks) or forcing 4 KB blocks using
> gnop.
>
> Just surprised, I didn't find references to the true block size.
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