All Questions
122
questions
0
votes
1
answer
458
views
mdadm: Reactivating RAID6 array after improper shutdown
I have a seven-disk RAID6 array on a file server. The server experienced a crash and a hard reset was required, resulting in an improper shutdown. Note that I/O activity was likely occurring on the ...
- 185
0
votes
1
answer
91
views
Recovering software raid
I have a 3-disk software raid 5. Two disk appear to have failed at the same time; their number of Events is the same, while other third disk's is higher. I have copied all three disks into new ...
- 103
1
vote
1
answer
708
views
How to proceed after creating software RAID 1 array on Linux
So, I've created a RAID 1 array using two 500 GB hard drives.
I used a Linux Mint Boot Disk, and then used mdadm to create the RAID 1 array using 2 hard drives, each which has a single primary ...
- 339
4
votes
1
answer
1k
views
HDDs occasionally "click" and dump this error
Every once in a while, my HDDs (6 1TB drives in a Linux md RAID-6 array) make a brief "click" sound, and I get this from dmesg. I don't really have any clue how to start diagnose this, or even how ...
- 152
0
votes
1
answer
2k
views
I reinstalled ubuntu and now I don't see my RAID drive
I originally had a Ubuntu 12.04 system with RAID5 array that I built using mdadm.
Due to issues with graphics drivers, the 12.04 system crashed and I had to reinstall the operating system. After ...
- 270
4
votes
1
answer
4k
views
MDADM RAID-0 does not increased size after grow on AWS Linux with EBS
I wanted to grew a Raid0 from 2 disks to 3 (each 1TB EBS on Amazon AWS) but the size did not change thereafter. The RAID started with two disks sdc and sdd and the new one was sdf.
Here is the grow-...
- 193
1
vote
2
answers
4k
views
mdadm one disk sometimes is missing after reboot
On a debian system my home directory is on a raid1 md array. After creation it worked fine for some time, but once the second drive disappeared from the array.
# cat /proc/mdstat
Personalities : [...
- 116
1
vote
1
answer
4k
views
Linux MD software raid stripe cache size
From what I can piece together the /sys/block/md0/md/stripe_cache_size is for raid5 and 6 set at a very low default value to avoid starving machines for memory.
By increasing this value you can get a ...
- 1,260
6
votes
1
answer
504
views
mdadm: Win7-install created a boot partition on one of my RAID6 drives. How to rebuild?
My problem happened when I attempted to install Windows 7 on it's own SSD. The Linux OS I used which has knowledge of the software RAID system is on a SSD that I disconnected prior to the install. ...
- 191
1
vote
0
answers
1k
views
mdadm partiton not large enough to join array
I've used Linux on and off for the last many years, mainly as dual boot or as Virtual Machines, but when I decided to build a Dev Laptop I though I'd bite the bullet and put Linux on as the base OS.
...
0
votes
0
answers
511
views
Hybrid Raid-1 HDD + SSD -- Write Intent Bitmap
I am currently running a laptop with 1 HDD and 1SSD.
I currently am using mdadm to put some partitions in a raid 1 configuration with --perfer-write set on the HDD. I have this working correctly ...
- 229
1
vote
0
answers
77
views
Is there a safe way to move a partition beneath a linux software RAID5 using mdadm?
Suppose, for example, that you have a RAID5 across multiple disks and you would like to retire the oldest of the disks and replace it with something from this decade. I know I can fail the partition ...
- 372
1
vote
1
answer
2k
views
mdadm --assemble fails when /dev/sd[abcde]1 reordered
I am having trouble assembling a small RAID5 due to a recurring reordering of /dev/sd[a-f] on boot (Debian7).
md0 was initially using sd[abc]1, it contains a LUKS device, which in turn contains a ...
- 21
3
votes
1
answer
6k
views
XFS: Mount overrides sunit and swidth options
I have a 9TB XFS partition consisting of four 3TB disks in a RAID-5 array with a chunk size of 256KB, using MDADM.
When I created the partition, the optimal stripe unit and width values (64 and 192 ...
- 33
1
vote
0
answers
707
views
mdadm: faulty Array, how to get recover as much as possible?
I have a RAID5 with 4 Disks in my PC. All of them were healthy (and the RAID itself) until before.
I tried to install windows 8.1 which automatically creates this "SystemReserved"-Partition. The ...
- 11