From owner-freebsd-hackers Thu May 13 2: 3:29 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from fionn.sports.gov.uk (dns0.sports.gov.uk [195.89.151.148]) by hub.freebsd.org (Postfix) with ESMTP id 2A87714C57 for ; Thu, 13 May 1999 02:03:17 -0700 (PDT) (envelope-from ad@fionn.sports.gov.uk) Received: from niamh.sports.gov.uk ([195.89.151.149] helo=fionn.sports.gov.uk) by fionn.sports.gov.uk with esmtp (Exim 2.10 #1) id 10hsJT-0004Br-00; Thu, 13 May 1999 10:01:59 +0000 Message-ID: <373A952C.4AFAA37C@fionn.sports.gov.uk> Date: Thu, 13 May 1999 10:02:36 +0100 From: Andrew Doran X-Mailer: Mozilla 4.5 [en] (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: Chuck Youse Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: fsck and large file system References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Chuck Youse wrote: > Whoa ... can anyone substantiate that this poor performance is typical > or atypical of DPT SCSI RAID controllers? This is atypical, however DPT HBAs are *very* touchy about termination and cabling. For instance, with two identical (old) Seagate Hawks on a SmartCache III, I get 2MB/s reads from one and 500kB/s from the other. At a minimum each drive's write cache should be disabled with dptmgr, since it causes problems with DPT HBAs. Andy. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message