OLD LaCie 4 x 250GB RAID Advice Needed

[ddrecovery]

I have this old 4 x 250GB drive Lacie RAID for recovery. From what I have read a lot of them are set up as 2 x RAID0 but not all. However this one is a little strange.

The main partition is detailed as 931GB which would lead me to believe its one volume.
However I can build one half as RAID0 with a 128KB stripe and lots of 2MB images open fine, others have no data.
The amount of data in that halfs folder structure says it has 640GB which again leads to one volume.
I have tried building the other half of the RAID0 but there is no folder structure just sectors filled with data from sector 0 (again leading to one volume)
I don't see how 2MB images can open from 2 drives if its one volume??
Does the LaCie have some inbuilt software that combines the two volumes in some way?
Its also HFS (not my strong suit in Hex) so I guess it could have been reformatted at some point and the data on the second side could be junk?

[data-medics]

I don't know if it helps at all, but I'm working on a Lacie rack storage NAS and after some digging it turned out to be just a Windows JBOD. So it may be a software RAID you're dealing with, not hardware.

[ddrecovery]

I don't know if it helps at all, but I'm working on a Lacie rack storage NAS and after some digging it turned out to be just a Windows JBOD. So it may be a software RAID you're dealing with, not hardware.

Is it possible to have 2 x RAID0 as a JBOD (ie both linked?)

[Dmitri]

Is it possible to have 2 x RAID0 as a JBOD (ie both linked?)

Strange things are possible when manufacturer needs to squeeze maximum capacity from a bunch of smaller drives .)

[ddrecovery]

There is another discussion on this forum from a while ago regarding the LaCie Bigger Disk, that was a 2xRAID0 c/w JBOD but no final resolution. If I get it I will let you know, but I think Dmitri already does

[ddrecovery]

I have now found that both sides are actually a RAID0 at 128KB. The second volume had some corruption. As the second set starts with data at sector 0 I need to find an offset for the second volume. As stated this is HFS (not my strong suit), whats the best way to calculate the offset?

[ddrecovery]

hhhmmmm thinking about it logically if its a JBOD, then starting on sector 0 on the second volume would make sense. I guess the parameters are built into the RAID software.

[ddrecovery]

FYI: I did work this out in the end. D0 & D2 and D1 & D3 were spanned volumes. These two volumes were then part of a RAID0. The confusing thing was that D0 & D2 do not go to the end of the drive, instead data stops short. So I created regions cropping out this spare space and the RAID assembled.