Fasttrack TX2 - Raid10, dmsetup table example?

[Torsten Krah]

thx for the info.

I wonder why the 01 setup is not supported by dmraid? Are there any 
technical issues or was there no need to implement it?

Torsten

Forge schrieb:
> 
> 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 at fachschaft.imn.htwk-leipzig.de
>     <mailto:tkrah at fachschaft.imn.htwk-leipzig.de>>
>     Subject: Fasttrack TX2 - Raid10, dmsetup table example?
>     To: ataraid-list at redhat.com <mailto:ataraid-list at redhat.com>
>     Message-ID: <457A8ED3.4090709 at fachschaft.imn.htwk-leipzig.de
>     <mailto:457A8ED3.4090709 at fachschaft.imn.htwk-leipzig.de>>
>     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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