Igor Fedotov wrote:
Hi chenhui,
there is still a work in progress to support multiple labels to avoid
the issue (
https://github.com/ceph/ceph/pull/55374). But this is of
little help for your current case.
If your disk is fine (meaning it's able to read/write block at offset 0)
you might want to try to recover the label using label from a different
OSD sitting on a similar(!!that's important!!!) main device. One needs
to update osd uuid, whoami and osd_key fields after copying though. Here
is the step-by-step procedure:
1. Copy OSD label (4K data block at offset 0) from source OSD's main
device to the same location on the broken one:
> dd if=<source_osd_block_device>
> of=<target_osd_block_device> count=1 bs=4096
Hi, Igor
I am repairing the lost label problem. But I have doubt about what's mean
"similar main device"? Our OSD and disk have a one-to-one relationship, without
disk partitions. How can I find source_osd_block_device ?
thanks