Currently I have three drives with 500GB, 1.5TB and 2TB and would like to know if it’s possible with mdadm to build a RAID 1 on top of the 2TB drive and the other two pooled together. Would this work if I first created a 2TB RAID with -level=linear and then a RAID 1 on … Read more
Is it possible, or feasible, or even sensible to consider hardware acceleration for MD RAID? I am referring more here to RAID6 type levels where there is a computation overhead. My thinking is that it is still disks that will provide the greater bottleneck, but I am surmising. As has been pointed out in the … Read more
Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Server Fault. Closed 6 years ago. Improve this question I have the following FIle system setup currently. I need as much room as i can get in ./home. root@Jm2:~# df -h Filesystem … Read more
I have a raid array with several drives marked as removed. I want to add them back in, but am not sure how to do so. [root@tera2 ~]# mdadm –detail /dev/md3 /dev/md3: Version : 1.2 Creation Time : Fri Nov 30 07:39:25 2012 Raid Level : raid6 Used Dev Size : 1940681216 (1850.78 GiB 1987.26 … Read more
Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Server Fault. Closed 2 years ago. Improve this question I am doing some experiments with hybrid RAID in Linux. My test consists of the following: 2x256GB SSD in RAID 0 (/dev/md1) 2x256GB … Read more
Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Server Fault. Closed 5 years ago. Improve this question I’ve come across a strange phenomena with a new dedicated server that’s been provisioned. The server has 2x1TB HDDs in software RAID 1 … Read more
We made a stupid upgrade on a running server using wrong repositories and the system became totally unbootable. The system, a SLES 11 we used a openSuse repository to upgrade, and everything went horribly wrong. It boots now only in (repair filesystem). On boot it fails to mount the RAID1 for the main LVMs. At … Read more
Is it possible to recover a RAID 5? After losing the “/proc/mdstat” and run by mistake “mdadm –create –verbose /dev/md0 –level=5 –raid-devices=4 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1” instead of mdadm –assemble –scan. Answer It helps if you know the configuration of the original RAID5. Perhaps you have saved the output of a prior run of mdadm … Read more
I have two drives in my desktop in RAID 1. My computer locked up on me yesterday, so I used SysRq REISUB for a “safe” restart. When the machine booted back up, I realized there was no data on my RAID drives (a few empty directories, but no actual data). Fearing the worst, I took … Read more
I have a Raid 5 with 4 disk and is not working, I can’t detect what disk is failing for replacement Could you help me? Thanks in advance Here is some information root@debian:~# mount /dev/md0 /mnt/ mount: /dev/md0: can’t read superblock root@debian:~# cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] [linear] [multipath] [raid0] [raid1] [raid10] md0 … Read more
