From owner-freebsd-questions Wed May 20 00:25:30 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id AAA05573 for freebsd-questions-outgoing; Wed, 20 May 1998 00:25:30 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from lucy.bedford.net (lucy.bedford.net [206.99.145.54]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id AAA05557 for ; Wed, 20 May 1998 00:25:24 -0700 (PDT) (envelope-from listread@lucy.bedford.net) Received: (from listread@localhost) by lucy.bedford.net (8.8.8/8.8.8) id DAA24013; Wed, 20 May 1998 03:24:55 -0400 (EDT) (envelope-from listread) Message-Id: <199805200724.DAA24013@lucy.bedford.net> Subject: Re: Qusetion In-Reply-To: <19980520045009.3950.rocketmail@send1a.yahoomail.com> from Gopi Kriahnan at "May 19, 98 09:50:09 pm" To: mindyob@yahoo.com (Gopi Kriahnan) Date: Wed, 20 May 1998 03:24:55 -0400 (EDT) Cc: questions@FreeBSD.ORG Reply-to: djv@bedford.net From: CyberPeasant X-Mailer: ELM [version 2.4ME+ PL38 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Gopi Kriahnan wrote: > Sir, > > Well I have small problem that I wanted to know clear about in the > part onthe country I live there is lot of powercuts, would this effect > the operating system (freebsd). Well let me know.. Yes, powercuts can damage the filesystem, as well as the hardware. The damage to the filesystem will be minimized (but not completely prevented) if the partitions are mounted for "synchronous writes". (This is the default). Power "brownouts" (lowered voltage) can also cause problems. Brownouts are common here in summertime. I live in a rural area and powercuts, as well as lightning storms, are common here. In the US, a backup power supply can be had for about US$150, adequate for one computer and monitor. These protect well against blackouts, brownouts, and surges due to lightning strike. The cost per computer protected goes down, if you have a central site, where many computers can be backed-up by a single large battery backup system. At the very least, a computer should have a /good/ surge protector, to protect against overvoltages due to lightning and sometimes improperly isolated machinery. Modem telephone lines should also be surge-protected -- an entire computer can be damaged by a lightning surge through a modem. Some brands of UPS can be connected to a serial port on the computer and cause the computer to shut down gracefully in the event that the power failure is more than a few minutes. Dave -- <----. mail-to: djv@bedford.net <----|=================================== <----' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message