Date: Mon, 11 May 2009 16:30:23 +0200 From: Jonathan McKeown <j.mckeown@ru.ac.za> To: freebsd-questions@freebsd.org Subject: Re: single SATA disk and yet identified as 'ad4' Message-ID: <200905111630.23123.j.mckeown@ru.ac.za> In-Reply-To: <Pine.LNX.4.64.0905111935570.6330@localhost> References: <Pine.LNX.4.64.0905111935570.6330@localhost>
next in thread | previous in thread | raw e-mail | index | archive | help
On Monday 11 May 2009 21:38:50 Saifi Khan wrote: > Hi all: > > The system has just one SATA disk and yet bootloader process > identified it as 'ad4'. Ideally, it should be ad1. [snip] > How does the labelling logic work ? FreeBSD reserves numbers for devices that aren't currently connected, so that if you connect them later your existing devices don't need to be renumbered. Your BIOS is reporting two IDE interfaces, each of which could have a master and slave disk drive, so ad0-3 are reserved for those four drives, meaning SATA starts at ad4. Some BIOSes let you change this. Jonathan
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200905111630.23123.j.mckeown>