Installing a second hard disk

Aitor San Juan asanjuan at
Wed Mar 14 10:39:02 UTC 2007

Thanks all who answered so quickly.

The PC's BIOS detects the complete capacity. The access mode was "auto",
and I have changed it to "LBA", but the same result: FreeBSD still sees
a disk (on ad2) capacity of 127 GB. The FreeBSD version installed is 5.4

Thus, I have installed the disk under Windows 2000, and behaves the same
way. However Windows XP recognizes the full capacity. The disk is a
Seagate IDE Ultra ATA disk.

Unfortunately site only offers help for Windows-based
systems, and the tools are also for Windows-based OS.

Anyway, I have ignored the warning regarding the geometry inaccuracy,
done the following manually:

fdisk -I /dev/ad2
bsdlabel -w /dev/ad2s1
newfs -U /dev/ad2s1a
mkdir /mydata
mount /dev/ad2s1a /mydata
echo "/dev/ad2s1a	/mydata	ufs	rw	2	2" >> /etc/fstab

but for FreeBSD the disk's capacity is still 127 GB.

The BIOS date is 21 Mar 2002. I've found out that there is a BIOS
upgrade for the motherboard dated June 2002 (if I'm not wrong).
So, will upgrading the BIOS solve this issue?

Or will upgrading to FreeBSD 6.2 solve it instead?

Thanks in advance for any hint or suggestion.

-----Original message-----
To: freebsd-questions at
Subject: Installing a second hard disk

> Hi List,
> I am trying to install a secondary hard disk in a Intel-based PC
> with FreeBSD 5.4
> This secondary disk's capacity is 250 Gb. When I enter sysintall
> to try to format it and create a slice, FreeBSD says that the
> geometry of disk is not correct. I, then, type in the values detected
> by the BIOS as suggested, but FreeBSD still complains that those
> are not valid. FreeBSD sees the new disk as a disk of approx. 131 GB.
> So my question is: where is the problem? Is it that FreeBSD is not
> able to recognise such a big disk capacity?
> Any hint, suggestion, or web link would be highly appreciated.
> Thanks in advance
> Aitor.

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