From owner-freebsd-hackers Wed Jan 3 03:05:55 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id DAA29654 for hackers-outgoing; Wed, 3 Jan 1996 03:05:55 -0800 (PST) Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.19]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id DAA29629 for ; Wed, 3 Jan 1996 03:05:35 -0800 (PST) Received: (from bde@localhost) by godzilla.zeta.org.au (8.6.9/8.6.9) id WAA02175; Wed, 3 Jan 1996 22:01:41 +1100 Date: Wed, 3 Jan 1996 22:01:41 +1100 From: Bruce Evans Message-Id: <199601031101.WAA02175@godzilla.zeta.org.au> To: freebsd-hackers@FreeBSD.ORG, j@uriah.heep.sax.de Subject: Re: HELP!!! THIS IS AN EMERGENCY (fwd) Sender: owner-hackers@FreeBSD.ORG Precedence: bulk >BSD does not have a 500 MB limit. It can speak whatever the hardware >allows for, this is c<=65535, h<=15, s<=255. For disks that are used 0 <= c <= 65535, 0 <= h >= 15, 1 <= s <= 255 >in a BIOS environment as well, the `s' limit is 63 however. This and the `c' limit is 1023 >would still account for 65536*16*31 = 32505856 blocks, or 15872 MB. 1024 * 16 * 63 = 1032192 blocks = 504 MB (1MB = 1024K) For IDE in c/h/s mode, the limit is 65536 * 16 * 255 = 267386880 blocks = 130560 MB For ATA/2 in LBA mode, the limit is 2^28 = 268435456 blocks = 131072 MB For SCSI, the BIOS limit should be 1024*256*63, but some some BIOSes have a limit of 255 heads, so the limit is 1024 * 255 * 63 = 16450560 blocks = 8032 MB Bruce