From owner-freebsd-hackers Tue Aug 4 21:52:40 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id VAA08267 for freebsd-hackers-outgoing; Tue, 4 Aug 1998 21:52:40 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from antipodes.cdrom.com (castles85.castles.com [208.214.165.85]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id VAA08255 for ; Tue, 4 Aug 1998 21:52:28 -0700 (PDT) (envelope-from mike@antipodes.cdrom.com) Received: from antipodes.cdrom.com (localhost [127.0.0.1]) by antipodes.cdrom.com (8.8.8/8.8.5) with ESMTP id VAA00618; Tue, 4 Aug 1998 21:51:25 -0700 (PDT) Message-Id: <199808050451.VAA00618@antipodes.cdrom.com> X-Mailer: exmh version 2.0zeta 7/24/97 To: Brett Taylor cc: freebsd-hackers@FreeBSD.ORG Subject: Re: couple of questions In-reply-to: Your message of "Tue, 04 Aug 1998 14:05:31 MDT." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 04 Aug 1998 21:51:25 -0700 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > - maximum file/partition size: > > - I've seen files (from an ls -l emailed to me) of ~ 7 GB, but > I'm not sure what the absolute maximum file size is. Is there > a hard limit? > - digging through the -current mailing list archive I found a note > from John Dyson saying the maximum partition size was 512 GB. > Is this still true (the note was from 97) and if so does it also > apply to 2.2.7? As previously discussed, the current cap is at 512GB. > - swap partitions > > - what's the maximum swap partition size? I seem to recall > reading on -current about someone w/ a 1 GB swap partition, but > my memory has been known to be faulty. Swap calculations are generally performed using signed integers to contain block numbers, so total swap appears limited to about 2^31 * 512 bytes (1TB if my mental shifting is correct). The partition limit size is the same for swap partitions. > - what's the maximum number of swap partitions you can have? The system default is to support 4 swap partitions, however this can be tuned with the NSWAPDEV kernel option. There does not appear to be a trivial limit; the hard limit would be around 2^31 again. > - multi-disk file systems > > - in the chart he references Caldera having "md" - I'm not sure > what this is. Any ideas? My interpretation was say /usr on > 1 disk, /tmp on another or something, but I'm still waiting for > an answer. If it helps he has "volume sets" listed under NT and > ODM under SCO Unixware FreeBSD supports the 'ccd' software RAID0/1 implementation, and a new implementation of same named Vinum is under development. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message