Raid1 problem

[Mark Haney]

Todor Andreev wrote:
> Hi all,
> I am ... let's say a sys admin, and I have this little problem every time I 
> build a mirror with mdadm. I build it by the ubuntu install and there come 
> the problems. The ubuntu version is 8.04.1, but it happens with 7.10 too. I 
> am a little scared about the data on this raid because i use it everywhere. 
> So this is the exact problem: install, configure raid1 with sda,sdb and the 
> folowing message appears on random basis at the start up screen (this is from 
> the syslog file but the same is shown at the start).
> 
> md: md0 stopped.
> Aug 25 09:52:54 SupportivoFileserver kernel: [ 36.004675] md: invalid raid 
> superblock magic on sda
> Aug 25 09:52:54 SupportivoFileserver kernel: [ 36.004722] md: sda does not 
> have a valid v0.90 superblock, not importing!
> Aug 25 09:52:54 SupportivoFileserver kernel: [ 36.004728] md: md_import_device 
> returned -22
> Aug 25 09:52:54 SupportivoFileserver kernel: [ 36.004960] md: bind<sda2>
> Aug 25 09:52:54 SupportivoFileserver kernel: [ 36.078227] md: md0 stopped.
> 
> After a huge research I didn't find any solution, except that the metadata has 
> to be set to v0.90 so the kernel could work properly. I checked the version 
> and it IS 0.90. I put it also in the mdadm.conf file as a declaration but 
> with no result. I switched the motherboard, assuming it could be the 
> chipset/driver issue, I switched the PSU but with no result. Tested all the 
> HDDs with Seatools and no problems (also they are almost new). I have no 
> ideas what is happening. I would be very grateful if you help me with this!
> Thanks!

First question.  Are the drives identical?

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Mark Haney
Sr. Systems Administrator
ERC Broadband
(828) 350-2415

Call (866) ERC-7110 for after hours support