[ale] Hardware RAID5 recovery in software

[dev null zero two]

You could also try a commercial data recovery tool like R-Studio ($39 iirc
and there's a linux version I believe) but you'll need to know the RAID
stripe size and parity type (there are also tools that will attempt to
detect that using entropy). have had great success doing that in a past
life professionally.


On Thu, Mar 6, 2014 at 11:37 AM, Chuck Payne <terrorpup at gmail.com> wrote:

> If you lost one, you should be able to replace that drive and raid
> will rebuild itself.  Have you tried to move all three drives and the
> card to a computer works? I have done this on Dell, but I will note
> that the machine were the same model, and I was able to rebuild the
> raid on the new machine once I replace the drive.
>
>
> Pup
>
> On Thu, Mar 6, 2014 at 11:28 AM, Beddingfield, Allen <allen at ua.edu> wrote:
> > You are going to have to probably go a step further -
> > If you want to recover the data from the degraded RAID 5, you are going
> to need a RAID adapter from the same manufacturer, and preferably the same
> model.
> > Allen B.
> > --
> > Allen Beddingfield
> > Systems Engineer
> > The University of Alabama
> >
> > ________________________________________
> > From: ale-bounces at ale.org [ale-bounces at ale.org] on behalf of Dustin
> Strickland [dustin.h.strickland at gmail.com]
> > Sent: Thursday, March 06, 2014 10:18 AM
> > To: ale at ale.org
> > Subject: [ale] Hardware RAID5 recovery in software
> >
> > I just want to put this out there: I'm not *very* familiar with RAID,
> > but I get by. I have a unique situation and I'm not sure how to handle
> > it -- suggestions would be appreciated.
> >
> > So, my client has a machine - an *old* machine - that was running an
> > ancient version of Redhat, acting as a Samba server. I'm not too clear
> > on the details of what happened, but the result: the motherboard in the
> > server is apparently bad. So is the RAID card that was installed. Also
> > one of the disks of the three that were installed. The other two work
> > fine. This machine will not boot, I tried everything. We've made the
> > decision to set up another machine to run Samba. Now here's the hitch.
> > The only available machine has only two SATA ports and we still need to
> > grab his old data.
> >
> > Yesterday I used a Live USB stick to dd the data from both of the good
> > drives, one at a time, on to a third. Now, I don't even know if the
> > data is recoverable - after we started copying the second disk, we left
> > it to run overnight so I haven't been able to check it out. If it *is*,
> > how would I go about it? I've never encountered hardware RAID before,
> > either - would this even be possible to fix in software?
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>
>
> --
> Terror PUP a.k.a
> Chuck "PUP" Payne
>
> (678) 636-9678
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