mark the drive as failed first mdadm /dev/mdX -f /dev/sdYX Power down and physically replace faulty drive. Make sure the partitions are properly aligned, as in http://www.ibm.com/developerworks/linux/library/l-4kb-sector-disks/#tools Boot and partition new drive, and if you want to partition the new drive similar as others, you can do it with.. sfdisk -d /dev/sdX | sfdisk /dev/sdY mdadm […]

Win7 unable to boot. After BIOS, computer restarts. Seems like boot sector error. Linux utils unable to find anything wrong. Boot win7 installation disk and select REPAIR, go to command prompt and run following instructions. bootrec.exe /fixboot bootrec.exe /fixmbr