From owner-freebsd-hackers Tue Dec 5 07:37:33 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id HAA09535 for hackers-outgoing; Tue, 5 Dec 1995 07:37:33 -0800 Received: from unix.stylo.it (ppp.stylo.italia.com [194.20.23.167]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id HAA09509 for ; Tue, 5 Dec 1995 07:37:04 -0800 Received: from trust.stylo.it (trust.stylo.it [194.20.21.30]) by unix.stylo.it (8.6.11/8.6.9) with SMTP id QAA01158 for ; Tue, 5 Dec 1995 16:32:29 +0100 Received: by trust.stylo.it with NT SMTP Gateway ver 31 id <30C465F4@trust.stylo.it>; Tue, 05 Dec 95 16:32:04 W From: Angelo Turetta To: freebsd-hackers Subject: Re: No Thumbs??? (lack of concensus) Date: Tue, 05 Dec 95 16:32:00 W Message-ID: <30C465F4@trust.stylo.it> Encoding: 25 TEXT X-Mailer: Microsoft Mail V3.0 Sender: owner-hackers@freebsd.org Precedence: bulk >From: Don Yuniskis >It seems that Michael Smith said: >> To answer the original question; a 60W switching supply will run a single >> 30W 5.25" drive. It will _not_ run two of them, although it might look >> like it will for a while. > >Fine. But I suspect it *would* run two 15W drives -- though the question of >sequencing spindles might still be an issue at startup! Correct? My server is equipped with 1542CFs and has 4 disks > 1GB. I'm really enjoying a nice feature called 'Send start unit' I've found on the 1542 BIOS: my disks are configured for waiting for the 'start unit' SCSI command before turning motors on, and the controller sends the command in sequence to all the drives. Is this option unavailable to more high-tech SCSI adapters, like the various PCI I'm hearing of (with a bit of envy :-) now and then??? And, in case you disable the BIOS o disagree using it's options: is it a workable option trying to send start unit commands from the driver itself ? Angelo Turetta SysAdmin - Stylo Multimedia - ITALY