All Questions
198
questions
0
votes
0
answers
319
views
Hybrid RAID (SSD+HDD) gives unexpected results
I am doing some experiments with hybrid RAID in Linux.
My test consists of the following:
2x256GB SSD in RAID 0 (/dev/md1)
2x256GB HDD in RAID 0 (/dev/md2)
Then I made md1 and md2 into a RAID 1 (/...
- 123
11
votes
1
answer
13k
views
How can I remove this "zombie" mdadm array?
Admittedly I'm not too familiar with MDADM. I recently set up an array for a NAS, but incorrectly sized the partitions in my setup script, and need to remove the array, re-partition the disks, and re-...
- 399
0
votes
0
answers
433
views
Why MDADM remove one of my Raid1 disk randomly?
I have a rapsberry pi 2 with 2 HDD connected to it thanks to a SATA-USB adapter. They are Raid1 mounted with MDADM.
The problem is that one of the two disks is randomly removed and marked as "Faulty"....
- 11
2
votes
1
answer
2k
views
how is mdadm executed during startup?
I think I read documentation/internet left to right, but I cannot see anywhere information, how is mdadm invoked during system startup. I cannot see anything in /etc/rcX.d, I cannot see any systemd ...
- 583
1
vote
1
answer
741
views
btrfs ontop of mdadm raid - calculating stripes for corrupt sectors for use with raid6check
I've got a setup with btrfs running on top of mdadm raid6 as btrfs's RAID5/6 code isn't stable yet. I figured this way I'd get the benefits of snapshotting and checksumming with a few extra hoops to ...
- 41
2
votes
1
answer
3k
views
mdadm shows inactive raid0 array instead of degraded raid6 after disk failure
I've been running an Ubuntu 18.04 system with an 8-disk raid 6 array, that crashed while having a faulty disk (I only noticed that there was a faulty disk after the crash). The raid array has survived ...
- 21
2
votes
2
answers
2k
views
raid 1 badly detected as raid 0 when one drive is missing
I'm learning raids, so maybe this is some basic question, but it's not covered anywhere...
When I create raid 1, update /etc/mdadm/mdadm.conf as[1], run update-initramfs -u, I can reboot and mount it....
- 583
3
votes
0
answers
253
views
Linux Software RAID - Migrate from disk device to a partition
I have two 8TB disks configured as RAID1 using mdadm on Ubuntu 18.04 server. They way I created software RAID was on the whole device - /dev/sdb and /dev/sdc - instead of the partition such as /dev/...
- 31
0
votes
1
answer
882
views
mdadm raid has unknown filesystem after adding new disk
My Computer is running ubuntu 1804 but i am new to linux.
I am using mdadm and created a raid-5 with 3x 4TB drives (sda, sdb sdc).
OS is on a separate SSD (sde).
No, I don't have a backup. Yes it is ...
- 1
1
vote
1
answer
2k
views
Software RAID Nonfunctional after power outage
My server lost power yesterday. It automatically booted up when power came back, but my RAID is now nonfunctional.
The RAID array is a software RAID6 built with mdadm. Originally, the array used 8 ...
- 31
1
vote
1
answer
743
views
MDADM reshape 2 disk raid 5 to 4 disk raid6
I have a somewhat non-standard mdadm reshape going on. I have a 2 disk raid5 (clean state) which I want to reshape into a 4 disk raid6. The reason this was created as a 2 disk raid5 instead of a 2 ...
- 476
0
votes
0
answers
116
views
Computer crashed, raid array in trouble
I arrived home today to find my home server was off (not idea why). Turned it back on again and the raid array was failing to mount.
/proc/mdstat shows:
Personalities :
md0 : inactive sdh[7](S) sdc[...
- 1
1
vote
2
answers
2k
views
Shrinking a RAID1 to free up space on the HDD for a new RAID1 Partition
I set up a webserver a while ago and made a mistake. I do have the following:
/dev/md0 swap (made from sda1 and sdb1)
/dev/md1 /boot (made from sda2 and sdb2)
/dev/md2 / (made from sda3 and sdb3)...
- 48
2
votes
0
answers
2k
views
Recovering a Synology Raid 0 from Ubuntu (Healthy drives)
I am trying to remount a Synology raid 0 with 3x2GB drives. As far as I know, the drives are in healthy condition.
I simply don't have enough space to do a full image of these before I proceed, so I ...
- 21
1
vote
0
answers
383
views
Disks have become spare with fake Raid. Is there any change to remount the volume?
I used the Intel Rapid Storage Technology (fake RAID) with 8 disks (6 disks for RAID 5 and 2 hot spares).
~# mdadm --detail-platform
Platform : Intel(R) Matrix Storage Manager
Version :...
