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/boot is on /: [0:root@elmo raid]$ df Filesystem Size Used Avail Use% Mounted on /dev/md2 1.9T 834G 1021G 45% / /dev/sdc2 3.6T 2.3T 1.4T 63% /bacula dos partition table (/dev/sdb is the same): [0:root@elmo raid]$ fdisk -l /dev/sda Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: dos Disk identifier: 0x7eb4f1d4 Device Boot Start End Sectors Size Id Type /dev/sda1 2048 16779263 16777216 8G 82 Linux swap / Solaris /dev/sda2 * 16779264 3907029167 3890249904 1.8T fd Linux raid autodetect Run: grub2-install /dev/sda grub2-install /dev/sdb Now, you can boot from either drive. Bill On 3/15/2018 11:52 AM, Gary Stainburn
wrote:
On Thursday 15 March 2018 15:43:49 Tim wrote:I thought with RAID1 being "all drives identical," and that unless you were using yet another drive to boot from (separate from your raid), that each drive would have a boot partition on it. Following that train of thought, if your controller didn't let you boot from a different drive (which seems a serious shortcoming, to me), wouldn't it be possible to just unplug the drives and put your still working one into the first slot? Just a brute force and ignorance approach to the situation... Seems to me that the idea of mirrored drives is to give an easy way of dealing with drive failures, surely it shouldn't impose complex routines to get past the first drive going bad.Tim, That is exactly what I thought until I was in that situation. sda failed so I disconnected it, leaving just sdb connected. It refused to boot. I tried swapping the cable to put it in the same SATA port on the board but it still didn't boot. Last time was some time ago, and /boot could not be a RAID device. This time /boot is a RAID device, but /boot/efi isn't and is just a vfat partition. Hence my question. If I just dd this partition from sda to sdb would that then make sdb bootable? _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx |
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