* Moving RAID1 disks between systems
@ 2013-05-24 16:53 Jim Santos
2013-05-24 18:30 ` Drew
0 siblings, 1 reply; 4+ messages in thread
From: Jim Santos @ 2013-05-24 16:53 UTC (permalink / raw)
To: linux-raid
Hi,
Let's say that two people each have a system with a RAID1 array made
up of two disks
(/dev/sda & /dev/sdb). Now let's say that one of the systems
experiences a failure that
keeps it from being able to be started (e.g. blown motherboard). Is
there a way to get the
data off of the failed system's disks after putting them in the
working system? It seems to
me that the disk device names stored in the superblock are going to
conflict with the device
names of the existing disks. But then again, I'm not a SW RAID expert ;-)
TIA
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Moving RAID1 disks between systems
2013-05-24 16:53 Moving RAID1 disks between systems Jim Santos
@ 2013-05-24 18:30 ` Drew
2013-05-24 21:58 ` Jim Santos
0 siblings, 1 reply; 4+ messages in thread
From: Drew @ 2013-05-24 18:30 UTC (permalink / raw)
To: Jim Santos; +Cc: linux-raid
Hi Jim,
You should have no troubles reassembling the array on a new machine.
From what I understand, md raid doesn't depend on device names for
assembling arrays, it has some internal UUID's to distinguish which
array a member disk belongs to.
mdadm --assemble --scan is pretty much all you need (and won't break
anything in the process)
--
Drew
"Nothing in life is to be feared. It is only to be understood."
--Marie Curie
"This started out as a hobby and spun horribly out of control."
-Unknown
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Moving RAID1 disks between systems
2013-05-24 18:30 ` Drew
@ 2013-05-24 21:58 ` Jim Santos
2013-05-25 19:44 ` Roy Sigurd Karlsbakk
0 siblings, 1 reply; 4+ messages in thread
From: Jim Santos @ 2013-05-24 21:58 UTC (permalink / raw)
To: Drew; +Cc: linux-raid
On Fri, May 24, 2013 at 2:30 PM, Drew <drew.kay@gmail.com> wrote:
>
> Hi Jim,
>
> You should have no troubles reassembling the array on a new machine.
> From what I understand, md raid doesn't depend on device names for
> assembling arrays, it has some internal UUID's to distinguish which
> array a member disk belongs to.
>
> mdadm --assemble --scan is pretty much all you need (and won't break
> anything in the process)
>
>
Is there a way to rename md devices? It would be useful in general and
maybe necessary if assembling the arrays from the other system causes
md device name collisions
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Moving RAID1 disks between systems
2013-05-24 21:58 ` Jim Santos
@ 2013-05-25 19:44 ` Roy Sigurd Karlsbakk
0 siblings, 0 replies; 4+ messages in thread
From: Roy Sigurd Karlsbakk @ 2013-05-25 19:44 UTC (permalink / raw)
To: Jim Santos; +Cc: linux-raid, Drew
----- Opprinnelig melding -----
> On Fri, May 24, 2013 at 2:30 PM, Drew <drew.kay@gmail.com> wrote:
> >
> > Hi Jim,
> >
> > You should have no troubles reassembling the array on a new machine.
> > From what I understand, md raid doesn't depend on device names for
> > assembling arrays, it has some internal UUID's to distinguish which
> > array a member disk belongs to.
> >
> > mdadm --assemble --scan is pretty much all you need (and won't break
> > anything in the process)
> >
> >
> Is there a way to rename md devices? It would be useful in general and
> maybe necessary if assembling the arrays from the other system causes
> md device name collisions
if you mean device name, it's configured in /etc/mdadm/mdadm.conf or similar (varies a bit between distros). that should hold the device name and its UUID
Vennlige hilsener / Best regards
roy
--
Roy Sigurd Karlsbakk
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roy@karlsbakk.net
http://blogg.karlsbakk.net/
GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt
--
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-05-25 19:44 UTC | newest]
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2013-05-24 16:53 Moving RAID1 disks between systems Jim Santos
2013-05-24 18:30 ` Drew
2013-05-24 21:58 ` Jim Santos
2013-05-25 19:44 ` Roy Sigurd Karlsbakk
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