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1) How can I detect if grub is installed in /dev/sdb's MBR? You can issue: # dd if=/dev/sda bs=512 count=1 | xxd | grep -i grub 1+0 records in 1+0 records out 512 bytes (512 B) copied, 0.00103986 s, 492 kB/s 0000180: 4752 5542 2000 4765 6f6d 0048 6172 6420 GRUB .Geom.Hard 2) Is it safe to run grub-install in /dev/sdb? Is this the correct way of ...


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You tagged software-raid, so learning grub can help: How to boot after RAID failure (software RAID)? GRUB Legacy identifies HDD devices in the /boot/grub/device.map file and maps them to the Linux devices. The GRUB Legacy (boot manager) file doesn't identify disks the same as Linux does. Instead of /dev/sda, the first disk would be identified as (hd0). ...


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No the existing data will not be erased when you add a disk to the SHR array. The message is simply saying the new drive being added will be formatted. You data and applications will actually remain available during the expansion process; there is no need at all to even stop using the NAS whilst SHR Vertical Expansion is taking place. That said - before ...


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A bit confused here - is it mdadm raid or lvm raid? In the question you mention lvm raid, yet keep trying to use mdadm raid. for lvm - first use pvscan -u possibly pvscan -a --cache /dev/sdc /dev/sdd would be enough to recreate your device. if not, use vgchange -ay VolGroup00 or vgcfgrestore VolGroup00 The other possibility is that you used ...



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