Date: Thu, 26 Sep 1996 19:36:32 -0700 (PDT) From: asami@freebsd.org (Satoshi Asami) To: bsdscsi@shadows.aeon.net Cc: freebsd-scsi@freebsd.org Subject: Re: striping/mirroring? Message-ID: <199609270236.TAA18470@silvia.HIP.Berkeley.EDU> In-Reply-To: <199609221053.NAA14141@shadows.aeon.net> (message from mika ruohotie on Sun, 22 Sep 1996 13:53:43 %2B0300 (EET DST))
next in thread | previous in thread | raw e-mail | index | archive | help
* i've asked this one on usenet before too, but got no replies... * * i'm about to set up a server that's meant to be "serious" in some * sense... * * the machine will be ga586hx512 boarded, about 128 megs of ram (later more), * and i will get adaptec 3940uw... * * now, what i want to know is which scsi drives would give me the best * performance/reliability... i've personally thought using barracuda 4lp, * but i feel a bit sceptic it's reliability... What performance? Sequential or random? I'm assuming that ga586hx512 is an Intel 430 HX with 512KB of cache, that's as good as it gets as far as motherboards go. If you want to maximize sequential access, you'll need about 6 or 7 disks to stripe across them, you'll get to about 28 MB/s with the option "I586_FAST_BCOPY". For random access, you'll need more like 30 drives through the filesystem to max out the motherboard. * anyway, the plot is, if freebsd is able to do it (i know how to strip * disks, not how to mirror) that i'd use disk striping on 3-4 drives, and * would mirror it to one... can i? how, if i can? That isn't mirroring. ;) If you have 2N drives, mirroring will make that look like a N-disk ccd. Satoshi
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199609270236.TAA18470>