I am a newbie of mdadm. I have a question but find no answer in document or google for last 10 days. The question is : RAID1 made by mdadm is full sync? for example, I have two disk(sdb and sdc) to make RAID1 disk (/dev/md127), if I commit an IO to the RAID1 disk (md127), it will return back to me when all the two disk commit successfully or it will return back to me once just one of the disk successfully commit. I have test with xfs and ext4 with sync option, and it seems that two disk have lots of commit difference after reboot the server. is that means mdadm return success when one of the disk is commit successfully? -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html