You have two full RAID0 arrays now. hda/hdb is one stripe, hdc/hdd is the other. You could also use hda/hdd or hdc/hdb, though, since the two stripes are identical.
This probably doesn't help you get your array recognized by dmraid, but you should be able to plug either half into just about any Promise raid controller and have it be recognized as a degraded array. Rebuilding on that should convert it from a degraded RAID10 to a functional RAID0, with no loss of data. You will also have another untouched degraded array half with all the data, just in case.
This is probably all stuff you already knew, but I hope something in here is helpful.
Message: 3
Date: Sat, 09 Dec 2006 11:24:19 +0100
From: Torsten Krah <tkrah@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Subject: Fasttrack TX2 - Raid10, dmsetup table example?
To: ataraid-list@xxxxxxxxxx
Message-ID: <457A8ED3.4090709@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Hello.
Got a raid10 array on a pdc20270 controller, fasttrack100 tx2.
Some loss of power made some serious damage to the complete pc.
The disks however are still working - the controller is a little bit
broken - no boot message about the raid things, only ide does still
work, more or less ( dma errors etc. pp ).
So i took the drives and put in on a normal ide controller - they are
all recognized.
running dmraid on a 2.6.17 kernel, ubuntu edgy, does found nothing.
Drives are found as follows:
hda, hda1
hdb - unknown partition table
hdc, hdc1
hdd - unknown partition table
I know there was a 10 setup prior on these 4 disks - although i don't
know how the pdc controller does the mapping on 4 drives.
Is it possible to create the mappings for a raid10 again - to get the
only partition on those drives back?
Anyone a example, found many for raid0 or raid1, but nothing for 10 - i
don't want to do some damage to the raid ( i hope its still there ... ),
so i'll asking before.
thx for any help.
kind regards
Torsten
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