Re: [Networker] recommendations for networker server upgrade

2008-05-01 19:16:52
Subject: Re: [Networker] recommendations for networker server upgrade
From: A Darren Dunham <ddunham AT TAOS DOT COM>
Date: Thu, 1 May 2008 23:13:00 +0000
On Fri, May 02, 2008 at 01:58:04AM +0300, Yaron Zabary wrote:
> Peter Viertel wrote:
> >Who says ufs only goes to 2TB?   Nobody told my 5TB one it can't exist.
> >;-)
>   I seem to recall that going over 1Tb required many patched on Solaris 
> 9. Going above 2Tb was not possible with regular LUNs. I think I read 
> that it was possible over some kind of LVM (DiskSuite ?).

There are several related issues:

When Solaris 9 first shipped, the maximum usable LUN size was <1TB and
the maximum size of UFS was <1TB.  Both limits were expanded (at
different times) with later releases of Solaris 9.  (EFI labels for
multi-terabyte luns, MTBUFS for the filesystem).

With those expansions, you could then run into a limitation in the scsi
driver that prevented accessing SCSI devices larger than 2TB (FC access
was not affected).  (Fixed in Solaris 10 FCS I think).

During Solaris 9 or 10 time (I forget if it matters), there was a
specific bug related to VxVM volumes larger than 2TB holding UFS
filesystems.  I see patches for that issue, so I suppose it has been
addressed as well.

Darren Dunham                                           ddunham AT taos DOT com
Senior Technical Consultant         TAOS  
Got some Dr Pepper?                           San Francisco, CA bay area
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