Date: Fri, 27 Jul 2007 13:34:32 -0400 From: Howard Goldstein <hg@queue.to> To: freebsd-stable@freebsd.org Subject: Re: [resolved, naively] Re: geom vs ich through ar device - benchmarks? Message-ID: <46AA2CA8.2080009@queue.to> In-Reply-To: <46A7B3FB.7010504@queue.to> References: <46A4E8FA.6010403@queue.to> <46A7B3FB.7010504@queue.to>
next in thread | previous in thread | raw e-mail | index | archive | help
Howard Goldstein wrote: > > ar device's RAID1 Using the awesome gmirror > write 1gb: 13.275 13.7 > rd 12.9 13.8 I recently had an opportunity to repeat this test with the same exact WD3200AAKS (7200RPM consumer grade 320g sata II) drives on an older hardware RAID card, the 3ware 8006-2LP plugged into a 32 bit PCI slot. The results were surprisingly poor given that this card does the RAID in hardware. With RAID-1 Write 1gb: 24.3s Read 1gb: 18.6 Using the same dd invocation as in the previous message, to a freshly newfsd 10GB slice at the beginning of the drive. The drives were strapped to 150MB/S since the 8006 has issues with SATA-II and the interface is nowhere near saturating anyway since the ultimate limit of the head<>platter is reached well below 150MB/S Sticking with gmirror/geom (thank you Pawel) FYI...
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?46AA2CA8.2080009>