Re: [RE]Intel SATA RAID

> dm create isw_cdgbeijgjh_iaa 0 1250275846 striped 2 256 8:0 8:16 0

Ok, so now that you have that information it is easy enough to calculate the stripe size to change it 2. It is simply 1250275846/(2*256) = 2441945.01171875

we want an even multiple so take 2441945*512= 1250275840

Soooo, replace the line in your "init" file

dm create isw_cdgbeijgjh_iaa 0 1250275846 striped 2 256 8:0 8:16 0

with

dm create isw_cdgbeijgjh_iaa 0 1250275840 striped 2 256 8:0 8:16 0

and the length not divisble by chunk size error should go away (for kernels 2.6.17 and above).

-James

---------[ Received Mail Content ]----------

Subject : Re: [RE]Intel SATA RAID

Date : Tue, 12 Dec 2006 22:30:14 +0800

From : Hadders <[email protected]>

To : "ATARAID (eg, Promise Fasttrak, Highpoint 370) related discussions" <[email protected]>

James Olson wrote:

> That solution of stopping and starting dmraid on the same line was

> only tested for those people who had previously installed FC5 to their

> striped dmraid array, and were unable to get it to work with a new

> kernel 2.6.17 and above update. If you created your partitions

> manually and manually copied the data over then there might be other

> problems to deal with. I suggest trying to install FC5 to the array

> with anaconda, the fedora core installer, first.

>

>

Okay, been there, done that. Same problem. New twist.

I nailed the container, recreated it (new name now), then installed a

minimal FC5 and used anaconda to create a custom layout.

Rebooted, updated dmraid to rc11, installed the new 2.6.18-1 kernel,

rebooted, nada.

Had a peak in the init file for the two (base/new kernel) initrd images

and found the following missing from the new one.

rmparts sdb

rmparts sda

dm create isw_cdgbeijgjh_iaa 0 1250275846 striped 2 256 8:0 8:16 0

dm partadd isw_cdgbeijgjh_iaa

ah ha! I thought, that's what I need. The container setup is missing

from the new kernel, why did the mkinitrd miss that? anyway, copied

those lines into the new kernel init, repacked the init rd and rebooted.

Then I get. device-mapper: table: 253:0 striped: Target length not

divisble by chunk size

Okay, so for some reason the new kernel (which runs device-mapper 4.7)

doesn't like my RAID partitioning either. *sigh*

So I've subscribed to the dm-devel list and asked for help there. I

searched their archives and found a couple of references, these usually

ended with people getting patches and the like.

Hopefully they can shed some light on this. But I can rule out

- dmraid level, now rc11

- parttition creation, done in anaconda

On the upside, I did identify the missing lines from the initrd and

managed to add them in quickly, just a pity that didn't fix it. ;-(

Thanks for your time and patience. Hadders

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