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Date:      Mon, 17 Dec 2012 17:27:31 -0800
From:      Devin Teske <devin.teske@fisglobal.com>
To:        Luke Bakken <luke@bowbak.org>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: FreeBSD as VMWare guest / disk resizing
Message-ID:  <3EB59092-BFE2-4C5F-85A2-E225FBC3F5D9@fisglobal.com>
In-Reply-To: <CAKZjE30RSfLneqVEP1qpQNvQu-=J8ky4ipM9Bh7US5QPOz22UA@mail.gmail.com>
References:  <CAKZjE30RSfLneqVEP1qpQNvQu-=J8ky4ipM9Bh7US5QPOz22UA@mail.gmail.com>

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It can be done but it's not easy and not pretty.

You'll have to rewrite the partition scheme to grow *only* the last partiti=
on and then use growfs on the last partition to zero the new inodes within =
its newly defined range.

You'll of course need to boot from another medium to do this.

I usually use DruidBSD for this:

DruidBSD-1.0b1.iso

(a tiny 23.5MB ISO that you can write to thumb disk with dd or burn to cd; =
either works fine)

Boot from it and use the tools like "disklabel -e /dev/yourdisk"

But=85 be extremely careful and do your mathematics!

I know this isn't a complete step-by-step guide, but I wanted to get the an=
swer out there that this is possible and it's a known quantity, but it can =
be dangerous if you get the math wrong when editing the disklabel positions=
, for example. If you can get that part right, the rest is easy (growfs).
--=20
Devin



On Dec 17, 2012, at 4:15 PM, Luke Bakken wrote:

> Hello everyone -
>=20
> I'm looking for a way to get FreeBSD 8 / 9 to detect that an already
> existing disk has grown. I have FreeBSD running as a guest within
> vSphere ESX 5. Here is the output of camcontrol showing how the disks
> are detected within the OS:
>=20
> [root@QA1HWFBSD83201 ~]# camcontrol inquiry da0
> pass0: <VMware Virtual disk 1.0> Fixed Direct Access SCSI-2 device
> pass0: 320.000MB/s transfers (160.000MHz, offset 127, 16bit), Command
> Queueing Enabled
>=20
> In the VM settings I can increase the disk size but I can't seem to
> find the right command within FreeBSD to force it to detect the new,
> larger size without a reboot. 'camcontrol rescan all' works great to
> detect a new drive but doesn't detect a larger disk. Within a Linux
> distribution like Debian, the following command will detect the larger
> drive:
>=20
> echo 1 > /sys/class/scsi_device/0:0:0:0/device/rescan
>=20
> I apologize if this has been answered in the archives or online but I
> just haven't been able to get a definitive answer if this is possible,
> and how.
>=20
> Thanks so much in advance,
> Luke
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> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
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