RAID, an acronym originally for Redundant Array of Inexpensive Disks (today usually interpreted as referred to as Redundant Array of Independent Disks), is a technology that provides increased storage performance and reliability through redundancy by spreading data across multiple disks using various algorithms (RAID-levels). RAID can be implemented in hardware storage controllers, or in software, usually as operating system/kernel features.
Questions tagged [raid]
3655 questions
1
vote
2 answers
Degraded soft raid1 not booting and showing raid0
I created a server setup with uefi boot and encrypted lvm partitions as you may can see here:
root@debian:~# lsblk -o name,uuid,type,size
NAME UUID TYPE SIZE
sda …
user543229
- 11
- 1
1
vote
1 answer
RAID upgrade - Can I power down individual disks to 'hot upgrade' an array?
I have a 4 disk RAID6 on an HP P420i (w/FBWC + battery module) that I need to upgrade with larger disks.
I was going to replace each disk in turn then wait for array rebuild until all 4 were replaced. Can I power down individual disks in the array…
lachs
- 141
- 1
- 4
1
vote
1 answer
CentOS: Install dm-raid module into initramfs to enable lvm raid boot?
I have CentOS 7, and I want lvm mirrors on my root logical volume.
I had some panic after I used "lvconvert -m3 cl_excalibur/root" to create two mirrors, and it would not boot. The logical volume does not activate at boot when it is raid1. I booted…
Charlweed
- 249
- 3
- 14
1
vote
1 answer
Why does XFS uses lvm cache chunk size instead the raid5 setup for sunit/swidth
I have 4 disks available on my virtual machine for testing sdb, sdc, sdd, and sde.
The first 3 disks are used for a RAID5 configuration, the last disk is used as lvm cache drive.
What I don't understand is the following:
When I create a cache disk…
Sander Visser
- 123
- 6
1
vote
1 answer
Can't limit mdadm's detection
I've got a problem with mdadm and generating initrd.
I had some problems with one disk, so suddenly mdadm started detecting my raid1 arrays to be on hda, hdb2, hdb3 - even though they should really be on hda+hdb1, hda+hdb2, hda+hdb3. The system…
viraptor
- 1,296
- 6
- 21
- 41
1
vote
0 answers
EX16650 lost array
I have an EX16650 with 16 HDDs and a Raid 60.
Afer a fail of 1 disk we have to restard the system.
That ends in a huge problem.
After the reboot the controller found 0 HDDs.
Then we look in the bios of the controller.
0 HDD too.
then we have…
Viperdriver2000
- 11
- 1
1
vote
0 answers
SCO OS 6 Driver for LSIL SAS1064E Raid Controller
A client has an SCO OpenServer Server 6.0, that is running on an HP ProLiant Box and they lost the root password.
Its equipped with a Doal-Core Intel Pentium Processor. They don't have any media or emergency disk anymore.
I tried to boot with the…
thm22
- 11
- 2
1
vote
1 answer
Replacing hard drive in RAID 5 array on HP ProLiant DL380p Gen8 Server
I'm a relatively new (and the only) system admin at my organization. We have an HP ProLiant DL380p Gen8 Server that is no longer under any sort of support contract from HP. We're using it as a Hyper-V host to 4 virtual servers. The virtual host…
Adam Sharpe
- 125
- 1
- 7
1
vote
0 answers
Mdadm Create array on partitioned disks - failed to write metadata to disk
I'm trying to setup a raid array for a server. The array is going to be RAID 5, consisting of 4 disks, sdc, sdd, sde, sdf
I need three partitions of specific sizes (2gb 200gb 700gb) and they need to be unformatted. Trying to partition /dev/md0 in…
Sgt_Breakneck
- 11
- 1
1
vote
0 answers
Unable to mount RAID5 partition after reboot
I have ubuntu 18.04.2 based server with Software based RAID5 partition for Data. After rebooting the system. It is unable to mount automatically. When I try to mount using command "sudo mount -a". I get following error.
mount: wrong fs type, bad…
Manu
- 111
- 2
1
vote
6 answers
sata and sas on the same machine
I know you can't mix SATA and SAS in the same RAID configuration, but is it possible to mount a SATA drive on the same RAID controller as its own logical drive?
If not, what do I need in order to mount a single SATA drive on a computer with a set of…
pstanton
- 623
- 3
- 11
- 23
1
vote
0 answers
what does UNCONFIGURED BAD mean
have a few SAS ssd's, the $4000 kind {manufacturer name withheld}.
I have had two now go to unconfigured bad after 1-2 hours of only powered on use, such that I am skeptical that the drive is not really bad but more likely a software or firmware bug…
ron
- 805
- 3
- 11
- 21
1
vote
0 answers
mdadm array does not assemble correctly
After a hard reboot, my raid10 array (made of 4 disk partitions) failed to reassemble. After many trials, i attempted the "nuclear" option of zeroing the superblocks and re-creating the array with the --assume-clean option:
% cat…
orionbelt
- 11
- 1
1
vote
0 answers
Winload.efi missing on RAID HDD
We have a workstation running Windows 8.1. At system start the error "winload.efi" missing occurs.
Now I wanted to drive a system repair. The problem is that the hard disk is hanging in a software RAID, so I can't work with a repair disk.
As soon…
Phil795
- 111
- 2
1
vote
1 answer
Ubuntu Not Starting Second RAID Array
Before I start let me say that I am by no means an expert with this stuff, if you see something that you would have done differently let me know.
Ok, so I have a Ubuntu 18.04 server with a boot drive and 4 8T drives. My plan was to make 2 RAID 0…
Jacob Larsen
- 11
- 1