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02-26-2014 04:28 AM
02-26-2014 04:28 AM
Hi @all
It maybe a trivial question:
I want to move a SAN filesystem (EVA P6500) from from a server to another one.
OS : SUSE SLES 11
The filesystem contains a RAID 1mirror (see below), is not LVM managed and formatted as ext3
---- Output of cat /proc/mdstat
md4 : active raid1 dm-5[0] dm-14[1]
31455164 blocks super 1.0 [2/2] [UU]
bitmap: 2/240 pages [8KB], 64KB chunk
----
Now I will get a new machine which should replace the old one.
I know,
1. umount disk on the old system
2. present SAN Vdisk to the new system
But I´m do not know how to import the disk on the new system without formatting (and loosing data :-) )
Which is the best practice to move SAN filesystem to the other machine?
Thanks in advance
Franziska
Solved! Go to Solution.
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03-08-2014 02:07 AM
03-08-2014 02:07 AM
SolutionYour /proc/mdstat output indicates that the RAID1 mirror set is built up on top of two device-mapper devices, dm-5 and dm-14. Those might be basically anything: I'm guessing they are probably multipath devices, but they also might be encrypted devices or other more complicated setups.
> The filesystem contains a RAID 1mirror
Normally the filesystem may _be contained in_ a RAID1 mirror set. Having a RAID1 set _inside a filesystem_ (i.e. multiple disk image files) would be highly unusual, although it is certainly doable in Linux. This might have been just a poorly-worded phrase from you, but it makes me *really* want to verify everything before giving you any suggestions.
The first step is to ensure we understand the entirety of the existing set-up from the filesystem level down to the individual /dev/sd* devices.
Please run this command as root, and post the output:
dmsetup ls --tree
(If the output is long, redirect it to a .txt file and attach the file to this thread.)
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03-10-2014 06:12 AM
03-10-2014 06:12 AM
Re: Move SAN partition formatted with ext3 from on server to another
Okay
But now it is too late... :-)
At the last weekend I just did the ugly way to move the content of the affected filesystem from one to the other machine (backup & restore).
But thank you for your replay.