Re: rescue an alien md raid5

[Harry Mangalam <harry.mangalam@uci.edu>]

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I mentioned the OSS layer because if LVM was involved, it would have 
been included in the GPL'ed SW listing.

As noted, there's no LVM software in the GPL listing, and none of the 
commands were found on the NAS device - it can be telnet'ed into, but 
has a limited set of tools available (busybox and not much else 
besides mdadm)

I've since found out that the data on the RAID was a set of VM images 
that were recoverable via other means so I'm stopping my efforts to 
restore it.  

It was an interesting diversion tho and I thank all of the comments 
and suggestions.  I've learned a lot.

Harry


On Saturday 14 March 2009, Ryan Wagoner wrote:
> No LVM has no correlation with mdadm. LVM stands for logical volume
> manager and lets you dynamically partition space on top of a real
> partition. Try running the commands below. If LVM is not used it
> won't affect the data on the disk. If it is used then your problem
> is resolved.
>
> On Tue, Feb 24, 2009 at 4:11 PM, Harry Mangalam 
<harry.mangalam@uci.edu> wrote:
> > Hi kpkim,
> >
> > You mean that the system needs an lvm/lvm2 layer to properly
> > interpret the underlying filesystem?
> >
> > Possible, but the USR OSS list:
> > <http://www.usr.com/support/gpl/8700-OpenSourcesList-0.63_USR.xls
> >> doesn't list lvm as part of their implementation.  Would mdadm
> > have been able to detect this?
> >
> > Harry
> >
> > On Monday 23 February 2009, hgichon wrote:
> >> I read USRobotics 8700 feature.
> >>
> >> # Supports linear storage use (all drives as one logical drive)
> >> or use multiple drives as primary and back-up storage
> >> # Dynamic logical drive sizing - Add an additional drive, when
> >> needed, and it will be integrated into the logical drive with no
> >> effect on data
> >>
> >> maybe... there is no lvm layer?
> >> try vgscan / vgchange -ay
> >>
> >> best regards.
> >
> > --
> > Harry Mangalam - Research Computing, NACS, E2148, Engineering
> > Gateway, UC Irvine 92697  949 824-0084(o), 949 285-4487(c)
> > ---
> > Good judgment comes from experience;
> > Experience comes from bad judgment. [F. Brooks.]
> > --
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-- 
Harry Mangalam - Research Computing, NACS, E2148, Engineering Gateway, 
UC Irvine 92697  949 824-0084(o), 949 285-4487(c)
---
Good judgment comes from experience; 
Experience comes from bad judgment. [F. Brooks.]
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