[mythtv-users] RAID: full disk or partition (was: Question re: available SATA ports and linux software RAID)

[John Drescher]

On Tue, Apr 26, 2011 at 10:30 PM, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
> On 27 April 2011 12:27, John Drescher <drescherjm at gmail.com> wrote:
>
>> And I meant drives that are connected. One could always reboot pulling
>> the sata cable. Assemble whatever array then plug the drive in and
>> zero the superblock or zero it in some other machine.
>
> Will zeroing the /dev/sdd superblock write anywhere on the /dev/sdd1 partition?
>
> That's my main concern..
> Otherwise, I'll have to manually fail each disk, remove them, re-add
> them... So I'm up for a few more days of md rebuilding (took me a week
> already to change the 1.5TB to 2TB disks ...)


What superblock are you using 1.2?

You may be able to manually zap the superblock like I did in this thread:

http://forums.gentoo.org/viewtopic-t-845757-start-0.html

Here is the link again to the wikipedia article that talks about the
superblock format.
https://raid.wiki.kernel.org/index.php/RAID_superblock_formats#The_version-1_Superblock_Format

John