Red Hat Bugzilla – Bug 141389
mdadm cannot assemble after moving disks ia32->itanium
Last modified: 2007-11-16 20:14:47 EST
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Description of problem:
Interoperability of md device between 32 and 64 bit systems.
We have a customer who was using software raid but trying to move it
between IA32 and Itanium systems. It broke so an IT ticket was open
(#44961). I did a quick hacking around the superblock checksum
(kernel) code, it seemed to be working with the changes. The issue was
further confirmed by a tech-list post by Doug Ledford at:
Open this bugzilla accordingly so Doug can add the patch into the kernel.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.create an md device on IA32 system
2.attach the disks into IA64 system
3.assemble the md device as usual
Actual Results: Syslog reports:
md: invalid superblock checksum on sda1
md: sda1 has invalid sb, not importing!
md: md_import_device returned -22
Expected Results: be able to move around md device between IA32 and
I meant to open the bugzilla against RHEL 4 but it doesn't seem to
give me a choice beyond RHEL 3.
Switching to RHEL4.
Moving to actual RHEL instead of RHEL Beta.
According to the comments #1, the upstream has included the fix in 2004-November.
So I suppose the latest rhel4 and rhel 5 should have the fix included. And it is
not a bug in the rhel 4.5.
Please re-test it with the latest rhel 4 and rhel 5. closing it..