Date: Tue, 2 Sep 2014 16:48:26 +0200 From: Borja Marcos <borjam@sarenet.es> To: Steven Hartland <killing@multiplay.co.uk> Cc: FreeBSD-scsi <freebsd-scsi@freebsd.org> Subject: Re: Samsung 840 Pro SSD and quirks Message-ID: <93D764A8-01AE-42FA-8020-65CEB6C7D64C@sarenet.es> In-Reply-To: <D8A848BC8761493EA5A049BFA77852CF@multiplay.co.uk> References: <A04E6D4A-907E-45AB-9668-0BF6827FD178@sarenet.es> <D8A848BC8761493EA5A049BFA77852CF@multiplay.co.uk>
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On Sep 1, 2014, at 5:44 PM, Steven Hartland wrote: > 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. I stand corrected. I have done some benchmarks with just two Samsung SSDs (zpool with two disks, no mirroring) and indeed I get better performance with 4 KB blocks. I did my original tests with 12 disks and some other bottleneck was hiding the performance difference. In both cases, anyway, Trim was working unless the system lies. Thanks!
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