All Questions
11
questions
0
votes
0
answers
128
views
mdadm lost RAID5 after new motherboard and processor
I moved my mdadm RAID5 to a different motherboard/processor, same boot drive.
The array is no longer found during a mdadm --assemble --scan
The motherboard was previously running INTEL RAID, so when ...
- 56
1
vote
1
answer
289
views
Clean up left-over around a RAID5 coming from a QNAP NAS
I just moved a 12TB RAID5 (4 disks of 4TB) from my QNAP NAS into my Linux Server (/dev/md0), and I noticed that there are three "left-over" partitions on each disk (/dev/sd*1, /dev/sd*2, /...
- 31
0
votes
1
answer
636
views
MDADM array rebuilding after every reboot
I have just grown my RAID-1 mirror in to a RAID-5.
After adding a 3rd disk, the array rebuilt successfully, but after restarting the array was showing as inactive, and the new disk (sde) had lost all ...
- 16
0
votes
1
answer
576
views
What does delta devices of the mdadm--detail output mean?
Here is an output of mdadm --detail:
$ mdadm -D /dev/md2
/dev/md2:
Version : 1.2
Creation Time : Wed Jun 24 16:41:17 2020
Raid Level : raid5
Array Size : 7809195456 (7447.43 GiB ...
- 123
1
vote
2
answers
2k
views
How to migrate mdadm RAID10 with 4 disks to RAID5?
I have a software RAID10 based on Linux’ mdadm under Debian Buster. Originally I found RAID10 had best performance. But I need more space and accept to trade some write performance for +50% space.
# ...
- 845
3
votes
1
answer
754
views
RAID5 does not spindown after grow (ext4lazyinit)
I had a RAID5 array consisting of 3x5TB disks assembled using mdadm. On top of that, I created a LUKS/dmcrypt encryption layer and formatted the encrypted device with ext4. I want the disks to spin ...
- 1,551
0
votes
0
answers
67
views
restore mdadm raid5 after 2 of 3 disks have been reformated with xfs
I have a 3 disk raid 5 where 2 disks have been accidentally formatted with the xfs file system.
The disks are partitioned into 6 partitions - sd[a,b,c][1-6]
The disks were present in a Buffalo ...
- 46
3
votes
1
answer
748
views
re-assemble out-of-date raid5?
I need help with my raid5 after it crashed through bad sectors.
Previously I could re-assemble it with
# mdadm --assemble --force -v /dev/md0 /dev/sde1 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1
but ...
2
votes
1
answer
6k
views
Assembling an mdadm array with "possibly out of date" disks
I've recently moved house and have had some power problems after switching on my file server that's using a mdadm RAID5 set up. The file system I'm using is ext4.
It seems that at some point two (of ...
- 21
2
votes
2
answers
1k
views
Recover Linux software RAID5 array after server upgrade
I recently upgraded a server from Fedora 6 to Fedora 14. In addition to the main hard drive where the OS is installed, I have 3 1TB hard drives configured for RAID5 (via software). After the upgrade, ...
- 121
1
vote
3
answers
637
views
Fluctuating transfer speeds with md RAID5/vsftpd
I have an Ubuntu 8.04.4 server with an md RAID5 consisting of 9 drives. While transferring a large amount of data to it (through vsftpd) I noticed very bad transfer speed fluctuation.
For example ...
- 87.9k