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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software RAID array not starting in initramfs on Debian
One of my Debian servers (kernel 2.6.30-AMD64) refuses to start the software RAID array that houses the root partition in initramfs. It dumps me with a busybox console. When I follow the necessary steps to continue booting it works fine (start the…
Jasper
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Super high density disk chassis
Certain companies (LSI, DDN) have enclosures that hold 60 hard drives in 4U of space. Why is it that these kinds enclosures aren't available unless you get them as a part of a "solution"? A 24 bay enclosure will run let's say four grand, why hasn't…
Novikov
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Linux RAID1 Software - grub resync after fail
I've a linux server with 2 IDE HD & Raid (hda - hdb)
I've changed the "BAD" hdb with a new:
mdadm --fail /dev/md2 /dev/hdb3
mdadm --fail /dev/md0 /dev/hdb2
mdadm --fail /dev/md1 /dev/hdb1
mdadm --remove /dev/md1 /dev/hdb1
mdadm --remove /dev/md0…
SmV
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Which is the best RAID between RAID 10 and 0+1?
Could anyone tell me which RAID would be the best between 10 and 01, and why?
Thanks for your help.
EDIT: I didt't want to know what's the best RAID ever... Otherwise I'd ask: "Why is NetApp RAID-DP so much better than EMC's RAID-6??". My question…
waszkiewicz
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FreeNas on Dell Powervault 745N: 2TB Limit?
I want to purchase 2 x 2TB drives, and install FreeNas on my Dell Powervault 745N.
People on the internets seem to be having trouble with the MD3000 firmware, and I want to make sure I can solve any issues before buying the drives.
Before I invest,…
willoller
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Windows Software RAID-0 or 1 as speedup of a developer workstation?
Would it help to speed up a developer workstation to put in a second drive and set up a windows software RAID-1 or RAID-0 (i.e. disk mirroring / striping)? In theory the system could distribute it's reads over both drives, giving almost twice the…
Dr. Hans-Peter Störr
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move Ubuntu to RAID
I have an Ubuntu Server up and running on LVM2 partition. My motherboard supports RAID 0 and 1.
I bought new, second HDD, the same as the system one. I want to set up RAID mirroring to ensure my data are safe.
How can I do this without reinstalling…
takeshin
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Setting up RAID or LVM for a HTPC
I'm working on building a HTPC. I have two 1TB drives that I'd like to combine. I'm thinking about using Ubuntu 10.04. From what I've read I want to use RAID or LVM. I'd prefer to use RAID0 since I'd rather have capacity over redundancy. Problem is…
Ian Burris
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mdadm raid5 failure. set wrong drive to faulty by accident
noticed a degraded raid where /proc/mdstats marked one device as down.
so i wanted to set the missing drive to faulty and reattach it.
somehow i got the wrong drive, leaving me with an unworking raid.
i tried to re-create the raid with…
yawniek
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Ubuntu- RAID5: New drive showing as SPARE in mdadm; how to make it active?
So I have a RAID5 spanning across 5 disk. Last week, we had 1 drive completely went bad, plus another drive that mdadm took offline due to bad sectors.
I got a new drive and mdadm is rebuilding it. However, I notice that later, YET ANOTHER drive…
fseto
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What is the procedure for reactivating a failed mdadm RAID5 array?
I have a three disk RAID5 array managed with mdadm, with an XFS filesystem on it. While I was using the machine, I noticed the machine suddenly become unresponsive (new programs wouldn't start, etc), but it was still up enough for me to open a new…
Jack Lloyd
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Cannot allocate additional space after growing RAID array
I added three new drives to a Dell 2950 (running RHEL 5) with a PERC 6/i storage controller. The machine was previously running RAID 1 on two drives + hotswap. Rather than create an identical RAID 1 array with the new drives, I opted to gain…
rvf
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Issue with broken disk on Solaris with raidctl - how to proceed
I have a SunFire T2000 server which has 2 mirrored disks pairs. The server required an exchange of the system battery. After swaping the battery first no disks were found. After booting from CD we managed to find the disks, but now one disk is…
weismat
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Assembling Software RAID in Live CD for data recovery
I need help recovering some data that's on my RAID which is on a LVM on my server running Ubuntu.
What happened was I deleted the logical volume that controlled my swap space which was on a partition on drives sda2, sdb2, sdc2, and sdd2 in RAID1.…
Maletor
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Dell Perc 6/i Raid Monitoring on Linux 2.6.32-2x kernels
I am running an LSI raid (Dell Perc 6/i) on my Ubuntu 10.04 server. I want to monitor the raid array but it seems that there is no software for it. The raid drivers are part of the kernel, but I dont see any tools for it. Software that is available,…
cmdematos
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