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
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Why does NETWORK SERVICE own my RAID?
I inherited a Windows Server Essentials 2016 machine that's set up with a C system drive and a D RAID. The problem is the D drive, on which everything works as expected below the top level. At the top level, though, I'm quite limited in what I can…
Bill
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Regarding active/passive failover, what utilities exist?
I am about to configure two Nagios servers with one being a hot-standbye or failover unit. It will periodically check the active Nagios server and will need to steal its IP addresses in the case of failure.
My first instinct it to just script this…
CarpeNoctem
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Errors on a zpool filesystem
I'm using ZFS on a Debian 9 machine.
This machine has been working for years without any problem until today.
The zfs pool is mounted on top of a RAID system, controlled by hardware (so only one drive is exposed to Linux as sda). You can see the…
marolafm
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Dell PERC H750 compatibility with Debian
I've been using Debian on Dell servers for many years.
For a long time I've been using the PERC H730P RAID controller, which is well supported by utilities like MegaCLI.
Recently I've bought a R440 Server with the new H750 Raid controller.
I've…
jlecour
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How to restore RAID1 configuration with 2 different HardDrives in CentOS-7
We have a server (HP ProLiant ML10 Gen 9) that came with Two Identical Hard disks. It was assumed that the server supports hardware RAID 1 (Mirror), and the CentOS-7 was installed in it. But later we got to know that the server doesn't support…
Surya H
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Optimal configuration for a RAID + ZFS
What would be the optimal configuration for a server using raid and where I want to place ZFS only?
I heard that while using ZFS would be better not to use at all the raid controller , is it correct?
Woden
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RAID controller detecting SSD as foreign after every reboot
My server, an R610, has been detecting my SSD as foreign after every reboot. It has a PERC 6/i RAID controller, but there's no actual RAID stuff (I just have all the drives as their own VDs).
This had happened a few times over the last year or two,…
Radvylf Programs
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Recovering data from a Dell MD3220 array after both controllers have databases that were corrupt
I have been working on trying to restore data from an array created on a Dell MD3220 PowerVault storage unit. On the phone with Dell and another support group for weeks now and running into brick walls. I was hoping that someone here might be able…
Arvo Bowen
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mdadm partitions gone after reboot
I had a RAID 6 setup in Cockpit UI with multiple partitions. There was one partition in particular that I wanted to extend from 10TB to 11TB using available space and attempted on /dev/md127p6 using "growpart /dev/md127p6 1". Afterwards I noticed I…
Jacob
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Need to recover RAID 6 array
By definition
RAID 6 is an array of independent hard drives equipped with two
independent and distributed checksum schemes
Does that mean I can recover each of the hard drives one by one using normal (not RAID) recovery software?
If no, is there…
Adil Malik
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How to mount existing Intel RAID ISM (RAID 0) device on Linux?
I have two 1TB drives from 2011 that I need to get the data off of ASAP.
Both of these drives are working and were configured as RAID 0 under a Windows Vista machine. Both drives are plugged into my Fedora machine, and I need to mount them as a RAID…
eccomassimo
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Rebuilding an inactive RAID5
I have a 7 x 14TB RAID5 in my workstation with Centos 7. Last week one of the drives was marked as faulty by SMART (/dev/sde). I used mdadm to mark this drive as faulty and to remove it from the array and ... long story short... I ended up pulling…
lalmagor
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Raid 10 - 6 Disk - Dell MD3200
I have 6 disk of 600GB.
I'm using a Dell Storage MD3200 , where i have created a disk group ( RAID 10 ) with 6 disks.
My disk slots parity are like this:
SLOT 1 : 0
SLOT 4 : 1
SLOT 7 : EMPTY
SLOT 10 : EMPTY
SLOT 2 : 1
SLOT 5 : 0
SLOT 8 : EMPTY…
SaroBeatbox
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Debian/Linux weird mdraid state
Why is md1 state UU, md0 is U_ and md2 is _U?
nvme1n1 is broken here.
Can I safely replace nvme1n1 now?
You can see md2 state, nvme0n1p3 seems removed but nvme1n1p3 seems active.
How can I safely replace the broken disk nvme1n1 here? What happend…
mrv1337
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Unknown filesystems on RAID5 partitions
I am trying to retrieve data from NAS (Acer Altos EasyStore M2) with dead mainboard.
System in the NAS is based on CentOS 5 and some software from Falcon (FalconStore) is used.
I removed disks from NAS and connected to other computer.
After starting…
lucky62
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