Migrating RAID array to a different manufacturer controller
Hello,
Here is a question that is maybe a bit off topic.
Sorry for that...
Is it possible to migrate a RAID array from a manufacter controller to another ?
Is it depend on the level of RAID ?
I've already be able to read data from RAID 1 because it's simple mirroring (with Mylex DAC 960 controller). But, it may not be the case for all controllers I suppose...
In fact, I have a server or a storage enclosure that use a CMD, ICP-Vortex or Mylex controller and I would like to get data from it.
Maybe it's possible with linux software RAID tools ?
What can differentiate from a controller to another ? Maybe the parity block size ?
Thanks in advance for your help !
B.R.
Signature · 3 lines
Fabien SALVI Centre de Ressources Informatiques
Archamps, France -- http://www.cri74.org
PingOO GNU/linux distribution : http://www.pingoo.orgThe stripe segment size, stripe order, the parameter block information (depends on controller, some have, some don't) being compatible, and any offset before starting storage space. For the most part, I would count on these things _not_ being compatible, and be happily surprised in any case where it is.
Your best bet is to get the same controller (and have it run the same firmware rev), to pull data off.
Good luck,
Ryan
Quoted 24 lines · On Feb 17, 2003 at 6:10pm +0100 Fabien Salvi wrote:
Hello,
Here is a question that is maybe a bit off topic.
Sorry for that...Is it possible to migrate a RAID array from a manufacture controller to another ?
Is it depend on the level of RAID ?
I've already be able to read data from RAID 1 because it's simple mirroring (with Mylex DAC 960 controller).
But, it may not be the case for all controllers I suppose...In fact, I have a server or a storage enclosure that use a CMD, ICP-Vortex or Mylex controller and I would like to get data from it.
Maybe it's possible with linux software RAID tools ?
What can differentiate from a controller to another ? Maybe the parity block size ?
Thanks in advance for your help !
B.R.
Quoted 9 lines · Ryan Weiss
The stripe segment size, stripe order, the parameter block information (depends on controller, some have, some don't) being compatible, and any offset before starting storage space. For the most part, I would count on these things _not_ being compatible, and be happily surprised in any case where it is.
Your best bet is to get the same controller (and have it run the same firmware rev), to pull data off.
Ok, I will try this.
Thanks for your advice, Ryan.
Signature · 8 lines
Fabien SALVI Centre de Ressources Informatiques
Archamps, France -- http://www.cri74.org
PingOO GNU/linux distribution : http://www.pingoo.org
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More majordomo info at http://vger.kernel.org/majordomo-info.htmlYou have to use one driver to read the data from adaptor A and another driver to write the data to adaptor B after you have setup the RAID arrays on adaptor B to match that of adaptor A. There is no homogenous way to access that data. Dell had proposed a common superblock format, but that pretty much got shot down because it eases the ability of customers to switch vendors.
Thanks
-steve
Quoted 22 lines · Fabien Salvi
Hello,
Here is a question that is maybe a bit off topic.
Sorry for that...Is it possible to migrate a RAID array from a manufacter controller to another ?
Is it depend on the level of RAID ?
I've already be able to read data from RAID 1 because it's simple mirroring (with Mylex DAC 960 controller). But, it may not be the case for all controllers I suppose...In fact, I have a server or a storage enclosure that use a CMD, ICP-Vortex or Mylex controller and I would like to get data from it.
Maybe it's possible with linux software RAID tools ?
What can differentiate from a controller to another ? Maybe the parity block size ?
Thanks in advance for your help !
B.R.