lseg
December 9th, 2017, 12:04 PM
Hi guys,
I have a system with 3 HDDs, All 3 have a 100GB partition with the OS, The rest ( 1.5 TB each) was added to a soft raid RAID 5 and mounted to /home. The 100GB partition were also softraid, but RAID1. I thought that was a good idea several years ago. Actually it isn't. My system crashed and I can not boot the OS again. The fact that is RAID 1, doesnt help, they all three have the same issue... I would like to change this for the future, and reinstall the OS on 1 of the three 100GB partitions e.g. sdc1, so not using softraid for the OS anymore, still keeping the RAID5 for the /home though.
Since I would still have the 100GB partition on sda and sdb I would like to make them a backup for my OS partition on sdc. I would like to copy this sdc1, with the installed OS, to the available sda1 and sdb1.
If my system crashes again, and I can not boot from sdc1, I would like to boot from an older copy which is on sda1 or sdb1. Is this possible?
Can I just do an rsync or a copy from a running OS partition to another partition (which I would then mount).
Can I just tell to GRUB: now boot from sdb1 instead of from sdc1.
I'm not so sure what should be changed to the copied drive (sda and sdb) to make it bootable, e.g. should I do something extra to make each disc bootable (MBR, ... not sure how this works). I suspect I also have to change something to fstab for each disk (fstab on each disk will need the UID from that disk and not from the original sdc). What else should I do?
Kind regards,
Luc
I have a system with 3 HDDs, All 3 have a 100GB partition with the OS, The rest ( 1.5 TB each) was added to a soft raid RAID 5 and mounted to /home. The 100GB partition were also softraid, but RAID1. I thought that was a good idea several years ago. Actually it isn't. My system crashed and I can not boot the OS again. The fact that is RAID 1, doesnt help, they all three have the same issue... I would like to change this for the future, and reinstall the OS on 1 of the three 100GB partitions e.g. sdc1, so not using softraid for the OS anymore, still keeping the RAID5 for the /home though.
Since I would still have the 100GB partition on sda and sdb I would like to make them a backup for my OS partition on sdc. I would like to copy this sdc1, with the installed OS, to the available sda1 and sdb1.
If my system crashes again, and I can not boot from sdc1, I would like to boot from an older copy which is on sda1 or sdb1. Is this possible?
Can I just do an rsync or a copy from a running OS partition to another partition (which I would then mount).
Can I just tell to GRUB: now boot from sdb1 instead of from sdc1.
I'm not so sure what should be changed to the copied drive (sda and sdb) to make it bootable, e.g. should I do something extra to make each disc bootable (MBR, ... not sure how this works). I suspect I also have to change something to fstab for each disk (fstab on each disk will need the UID from that disk and not from the original sdc). What else should I do?
Kind regards,
Luc