From owner-freebsd-scsi Sat Feb 24 08:47:25 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id IAA22021 for freebsd-scsi-outgoing; Sat, 24 Feb 1996 08:47:25 -0800 (PST) Received: from zit1.zit.th-darmstadt.de (zit1.zit.th-darmstadt.de [130.83.63.20]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id IAA21985 for ; Sat, 24 Feb 1996 08:47:19 -0800 (PST) Received: from [130.83.63.13] (apfel.zit.th-darmstadt.de [130.83.63.13]) by zit1.zit.th-darmstadt.de (8.6.12/8.6.9) with SMTP id RAA14156 for ; Sat, 24 Feb 1996 17:47:14 +0100 X-Sender: michael@zit1.zit.th-darmstadt.de Message-Id: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Sat, 24 Feb 1996 17:47:25 +0100 To: freebsd-scsi@freebsd.org From: petzi@zit.th-darmstadt.de (Michael Beckmann) Subject: Block size on hard disk Sender: owner-freebsd-scsi@freebsd.org Precedence: bulk Hi, I have a 4 GB SCSI disk (DFHS) from IBM in my system, attached to an NCR 810 controller. It is formatted for 512 bytes per block, like mosts hard disks. I noticed that the disk can be formatted for 512, 1024 and 2048 bytes per block. I was thinking whether it would be wise to reformat it for 1024 B/block. I know of some Seagate disks which gain a few 100 MB through this. But I also heard that some operating systems have trouble with larger block sizes. I assume that FreeBSD is not vulnerable to this ? Will it have an effect on performance ? Any experiences with this ? Thanks, Michael