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Did you say this was a RAID1 mirror?

I would change the de11de11 to 00000000 on sdc only. That should be enough to kill the ddf1 metadata

You could also simply try
dmraid -r -E -f ddf1 /dev/sdb

Maybe dmraid has been fixed in the last year though I doubt it!

Be very careful with this post. Here be dragons

So just a hunch, but the DDF1 metadata begins with a static identifier (0xde11de11). If you dump out the block using DD, can you hex edit that...

Perhaps the DMESG output would be useful too

Could you post the output of

dmraid -n /dev/sda
dmraid -n /dev/sda -f isw

I think your problem with erasing the first/last sector of your disk is that one or other of them contains metadata...

No problem from me with reviving an old thread!

I don't know anything about isw but I suspect that it stores its metadata in the same block as ddf1 so when you trash ddf1 using DD you also trash...

The disk was originally partitioned and formatted in Windows so the GPT was at an offset of 1024 bytes which worked for Windows but was no good for linux.
In the course of my troubleshooting I ended...

Hi oldfred

Thanks for taking the time to respond.

The linux kernel seems to be aware that the underlying hardware is using 4096-byte physical blocks:

root@ubuntu:~# dmesg | grep sdc
[ ...

So why didn't dmraid remove the metadata when asked? Because it's buggy.

ERROR: ddf1: seeking device "/dev/sda" to 512104901378048

512194891378048? What is that? It's (2^16) * 1953525167 is...

Solved with the help of SolarisBoy in IRC.

BE CAREFUL IF YOU'RE FOLLOWING THESE INSTRUCTIONS!!

dmraid revealed the offset of the errant ddf1 metadata to be 1953525167 512-byte sectors from the...

So I tried that command and it errors out:

ERROR: ddf1: seeking device "/dev/sda" to 512104901378048
ERROR: writing metadata to /dev/sda, offset 1000204885504 sectors, size 0 bytes returned 0...

Quantal. MSI motherboard with SB700 chipset. RAID1 mirror shows as degraded

Looks like /dev/sda has 2 different types of RAID metadata.


root@ubuntu:~# dmraid -n /dev/sda
/dev/sda: "pdc" and...

I've taken everything off the drive and created a new GPT from inside Ubuntu. I then created a single NTFS partition and put some data on it.
Rebooted into Windows and... "Uninitialized disk", no...

Hey lemming465

I kind of had my head up my butt today and consequently didn't properly read your response and I feel like my reply was a bit rude. Sorry about that.

Now I've actually read and...

Could I make it do SLAAC + static and prefer the SLAAC address for outbound?

Minimal install of 12.04LTS

I'd like to have a static IPv6 + privacy address.

With "iface eth0 inet6 auto" I get privacy + SLAAC
With "iface eth0 inet6 static" I only get static. This seems...

Would I be better of posting this in the beginners forum?

I have a PC that I need to dual boot between Windows and Ubuntu 12.04.
When I need to boot into Ubuntu I'm using a live USB stick.

I'm having a lot of difficulty mounting one of my NTFS drives...