From owner-freebsd-questions Fri Jun 14 15:50:35 2002 Delivered-To: freebsd-questions@freebsd.org Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by hub.freebsd.org (Postfix) with ESMTP id 5471A37B40C for ; Fri, 14 Jun 2002 15:50:32 -0700 (PDT) Received: (from dan@localhost) by dan.emsphone.com (8.12.3/8.12.3) id g5EMoUb4095164; Fri, 14 Jun 2002 17:50:30 -0500 (CDT) (envelope-from dan) Date: Fri, 14 Jun 2002 17:50:30 -0500 From: Dan Nelson To: David Smithson Cc: FreeBSD-Questions Subject: Re: Urgent: DTF tape drive I/O error Message-ID: <20020614225030.GD72247@dan.emsphone.com> References: <20020614190728.E3AB05D04@ptavv.es.net> <004401c213d8$ef7b3cd0$0801a8c0@customfilmeffects.com> <20020614204853.GB64898@dan.emsphone.com> <00a101c213e8$bd1d9c50$0801a8c0@customfilmeffects.com> <20020614212821.GD64898@dan.emsphone.com> <00af01c213eb$e037a2a0$0801a8c0@customfilmeffects.com> <20020614214208.GA72247@dan.emsphone.com> <00e001c213f2$3414ffc0$0801a8c0@customfilmeffects.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00e001c213f2$3414ffc0$0801a8c0@customfilmeffects.com> User-Agent: Mutt/1.3.99i X-OS: FreeBSD 5.0-CURRENT X-message-flag: Outlook Error Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In the last episode (Jun 14), David Smithson said: > Thank you, Dan. I'll let them know and give it a shot. Any idea why > FreeBSD's tape devices are limited to 64k block-size? Historical reasons. Back when all you had was ISA, the largest size you could DMA into memory was 64k. Now everything's PCI and can handle larger blocks, but the drivers still have 64k hardcoded in them. At least that's what other people have told me :) -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message