Re: How to create a large filesystem?

[Stephen Borrill <netbsd%precedence.co.uk@localhost>]

On Sat, 21 Feb 2009, Simon Burge wrote:
> Martti Kuparinen wrote:
>
> > How can I create (preferably only one large 5+ TB) filesystem on this disk?
> >
> > NetBSD 5.0_RC2 (GENERIC) #1: Fri Feb 20 04:49:20 EET 2009
> > ...
> > sd0 at scsibus0 target 0 lun 0: <DELL, PERC 5/i, 1.03> disk fixed
> > sd0: fabricating a geometry
> > sd0: 5586 GB, 5720064 cyl, 64 head, 32 sec, 512 bytes/sect x 11714691072
> > sectors
> > sd0: fabricating a geometry
> > sd0: mbr partition exceeds disk size
> > sd0: GPT GUID: 95027669-f71d-4a6f-9312-a1c4e5746c7e
> > dk0 at sd0: 4d4bdea5-b403-4de4-bf43-891756465be0
> >
> > # disklabel sd0
> > a: 3124756480         0     4.2BSD      0     0    0
> > d: 3124756480         0     unused      0     0    0
>
> I don't have access to the systems anymore, but you should be able to
> newfs the raw device (rsd0d) directly.  You may have to use a -s param
> to force the correct size.  Something like:
>
>         newfs -s 3124756480 /dev/rsd0d
>
> might work.  The largest FS I used this with was about 27TB.  I never
> did get to play with wedges though...

You'll probably need -F too to bypass the disklabel check for 4.2BSD. 
I've used this method a lot on 4.0 and upwards with success (though there 
is always the possibility, especially if a RAID card presents the volumes 
as ld, that the drivers might not support 64-bit disk addresses correctly. 
The mailing lists will archive my issues with aac vs ld. I fixed that 
problem, but there may be similar gremlins in other drivers).

--
Stephen