Date: Thu, 22 Apr 1999 17:43:02 -0500 From: Dan Nelson <dnelson@emsphone.com> To: Glenn Johnson <gjohnson@nola.srrc.usda.gov> Cc: mi@aldan.algebra.com, questions@FreeBSD.ORG Subject: Re: writing slower with SoftUpdates Message-ID: <19990422174301.B51036@dan.emsphone.com> In-Reply-To: <19990422172216.A552@symbion.srrc.usda.gov>; from "Glenn Johnson" on Thu Apr 22 17:22:16 GMT 1999 References: <199904212008.QAA57336@misha.cisco.com> <19990422163120.A48347@dan.emsphone.com> <19990422172216.A552@symbion.srrc.usda.gov>
next in thread | previous in thread | raw e-mail | index | archive | help
In the last episode (Apr 22), Glenn Johnson said: > Interesting! I ran your script and found all three of my SCSI drives > had write caching enabled. Is it the same situation with IDE drives > and softupdates with regards to performance degradation? Most IDE drives don't even support command queueing and have such small internal buffers compared to equivalent SCSI drives (i.e. IBM's Deskstar 16gb IDE has a 512k cache, while the Ultrastar 18gb SCSI has a 2MB cache), so you're not going to see much of a decrease because of the write cache. -Dan Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19990422174301.B51036>