2
votes
1answer
42 views

How to add partition table to existing EXT4 filesystem

I have software RAID6 on 8x3TB disks (18TB), there is filesystem od device /dev/md1, but EXT4 can`t be bigger than 16TB so there is 2TB of free space. I would like to use this space. My first idea was ...
1
vote
0answers
47 views

shrink live mdadm partition with LVM

My goal is to shrink an mdadm RAID 1 partition while the system is running. I have to disks sda and sdb, which build my two RAID partitions md0 and md1. On md1 I use LVM, md0 is the /boot partition. I ...
-1
votes
2answers
109 views

Recommended solution to join partitions (disks) into single partition [closed]

I have 4 hard disks (1 Tb each) on server. It's debian wheezy, amd64. Disks 2,3 and 4 are not partitioned yet. I have to join them into single partition, it must be single filesystem/mountpoint for ...
0
votes
0answers
137 views

Partition missing on ephemeral storage on ec2 after reboot (not restart)

I had a software RAID 0 on an ec2 instance. I needed to make some changes so I stopped the RAID, unmounted it, and rebooted the instance. What's troubling is, I don't see a partition for one of the ...
0
votes
3answers
351 views

How to add existing /home on MDADM RAID to new LVM based OS install

Have (32-bit) Centos 5.6 file server with 2x1TB HDD/ext3 in MDADM RAID-1 as follows: Disk /dev/sda: 1000.2 GB, 1000204886016 bytes Device Boot Start End Blocks Id System ...
0
votes
1answer
166 views

Partition Centos | Raid

I have 4 HDD, the system is installed on /dev/sda2 # df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 884G 2.1G 836G 1% / /dev/sda3 2.0G 159M 1.7G ...
0
votes
2answers
2k views

mdadm lvm and ext4 slowness - How can I speed it up?

I can't figure out why I'm getting such terrible times out of my mdadm and in particular the lvm partitions in it. I made the raid: mdadm --create --verbose /dev/md0 --level=5 --chunk=1024 ...
2
votes
3answers
2k views

mdadm: Swapping out small hard drives for bigger ones in a RAID5, How to partition?

So I got the gist of swapping out smaller hard drivers for bigger ones in an MDADM RAID5: Fail and remove one drive. mdadm -f /dev/md0 /dev/sdd1 mdadm -r /dev/md0 /dev/sdd1 Shutdown, swap the ...
15
votes
2answers
2k views

Verify A Partition is Aligned in Linux With RAID and LVM

Does anyone know the steps to verify that a XFS filesystem on top of LVM and md RAID is properly aligned on an array of 4096 Byte aka "Advanced Format" sectored disks? Some references are: ...