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#1 (**permalink**) 01-16-2008, 02:03 PM

Are there any constraints (power is the obvious worry, the machine
will be a long way away and I don't want anything to fry) to putting
larger SCSI disks in an Ultra2? Specifically I want to put a couple
of 18GB drives as we're going to need more than the current 4.xGB
disks for Solaris 10!

Thanks

--tim

#2 (**permalink**) 01-16-2008, 02:03 PM

On Mon, 25 Apr 2005 16:15:06 +0100, Tim Bradshaw <tfb@cley.com> wrote:
> Are there any constraints (power is the obvious worry, the machine
> will be a long way away and I don't want anything to fry) to putting
> larger SCSI disks in an Ultra2? Specifically I want to put a couple
> of 18GB drives as we're going to need more than the current 4.xGB
> disks for Solaris 10!

I've been running 18GB 10k RPM disks in a dual processor Ultra 2 for a
couple of years without problems. The machine even has all of it's SBus
slots filled. It does get quite warm though!

Brian

#3 (**permalink**) 01-16-2008, 02:03 PM

On Mon, 25 Apr 2005 16:15:06 +0100, Tim Bradshaw <tfb@cley.com> wrote:

>Are there any constraints (power is the obvious worry, the machine
>will be a long way away and I don't want anything to fry) to putting
>larger SCSI disks in an Ultra2? Specifically I want to put a couple
>of 18GB drives as we're going to need more than the current 4.xGB
>disks for Solaris 10!

There is no size limit for scsi disks. The only constrains are the 2GB limit
for the root fs (i.e. the root filesystem must be located completely within
the first 2GB of the boot disk) and the 1TB UFS size limit.

Mit freundlichen Grüßen

Frank-Christian Krügel

#4 (**permalink**) 01-16-2008, 02:03 PM

On Mon, 25 Apr 2005 19:26:16 +0200, "Frank-Christian Kruegel"
<dontmailme@news.invalid> wrote:

>On Mon, 25 Apr 2005 16:15:06 +0100, Tim Bradshaw <tfb@cley.com> wrote:
>
>>Are there any constraints (power is the obvious worry, the machine
>>will be a long way away and I don't want anything to fry) to putting
>>larger SCSI disks in an Ultra2? Specifically I want to put a couple
>>of 18GB drives as we're going to need more than the current 4.xGB
>>disks for Solaris 10!
>
>There is no size limit for scsi disks. The only constrains are the 2GB limit
>for the root fs (i.e. the root filesystem must be located completely within
>the first 2GB of the boot disk) and the 1TB UFS size limit.

This restriction is not applicable to the sun4u platform. It was a
limitation on 32-bit systems. On older 32-bit systems the limit was
1GB.

Josh

#5 (**permalink**) 01-16-2008, 02:03 PM

"Frank-Christian Kruegel" <dontmailme@news.invalid> writes:

> On Mon, 25 Apr 2005 16:15:06 +0100, Tim Bradshaw <tfb@cley.com> wrote:
>
> >Are there any constraints (power is the obvious worry, the machine
> >will be a long way away and I don't want anything to fry) to putting
> >larger SCSI disks in an Ultra2? Specifically I want to put a couple
> >of 18GB drives as we're going to need more than the current 4.xGB
> >disks for Solaris 10!
>
> There is no size limit for scsi disks. The only constrains are the 2GB limit
> for the root fs (i.e. the root filesystem must be located completely within
> the first 2GB of the boot disk) and the 1TB UFS size limit.

Not correct for sun4u:s with up to date OBP.

This is true for sun4m and later sun4c (obp 2.x) but was fixed in obp 3.x.

I'm running a U2 with two 18G disks and I have a 16G root.

>
> Mit freundlichen Grüßen
>
> Frank-Christian Krügel

Thomas

#6 (**permalink**) 01-16-2008, 02:04 PM

In <ey3fyxeubut.fsf@cley.com>, Tim Bradshaw wrote:
> Are there any constraints (power is the obvious worry, the machine
> will be a long way away and I don't want anything to fry) to putting
> larger SCSI disks in an Ultra2? Specifically I want to put a couple
> of 18GB drives as we're going to need more than the current 4.xGB
> disks for Solaris 10!

I have two 10KRPM 72GB drives in my (Solair) Ultra2, no problems there.

--
Dean C. Strik Eindhoven University of Technology
C.Strik@tue.nl - dean@stack.nl -- http://www.ipnet6.org/
"This isn't right. This isn't even wrong." -- Wolfgang Pauli

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Bigger disks in an Ultra2