Questions tagged [raid-5]

A type of RAID redundancy that includes parity data spread across a number of member disks

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Can I remove a drive from a rebuilding RAID 5 system?

I want to know if I have a RAID 5 system that had a failed drive, I replaced it with the wrong drive and it started to rebuild. I need to know if I can pull that drive while it is rebuilding and ...
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raid(5)-hdd poor performance vs single ssd drive

i have a raid 5 configuration on HP gen9 server with eight hard disks (hp-10k-1.2TB disks). that server intended to serve as a Microsoft SQL sever and contains a database with 143GB size. i have run ...
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Recovering a Microsoft Storage Space Pool RAID 5

I have a storage space pool based on 3 disks of 8TB each in a RAID 5 setup. I have accidentally quick formatted the storage space volume. Is it possible to recover the volume? I have tried many ...
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Raid 5 on a GA-970A-DS3P motherboard. Simple remove and reinsert HD

Good Evening, I've setup a colleciton of four hard drives on a Raid 5 arrengment using a GA-970A-DS3P motherboard. Just getting to know the processes and im trying a simple remove and reinsert of one ...
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Is it safe to stop a RAID 5 expansion?

I'm having some issues expanding a RAID 5 array on a Synology DS413. The drive has gone from 3 x 3TB WD Green drives to 4 x 3TB. I started an expansion operation and it's been stuck at about 60% and ...
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Can I use three SSDs in RAID 5 with an operating system install on one of them?

I have three identical 500GB M.2 SSD's installed on my motherboard, and want to run them all in a RAID 5 array, where I would have ~1TB usable storage. I currently have Windows 10 installed and ...
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RAID 5 Windows 10

Rev 1. - Provided Screenshot for Further Clarification. When I convert my storage drive from a basic to a dynamic disk in Windows 10, using diskpart.exe, there is one partition but no volume to go ...
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Degraded RAID5 after complete disk failure - What to do Now?

I am running OMV 3.0.99 on my NAS. I have set up a RAID5 (with mdadm) containing of three 5TB WD RED drives. I have set up the RAID using the OMV GUI back in the day (2016). Recently one of the disks ...
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54 views

RAID 5 parity bits - recovering data

This is an old topic but I have a question about RAID 5 parity bits that confuse me. My question is: So that, in every explanation of RAID 5, it is said that RAID 5 has parity bit in every disk. And ...
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Dell PERC H810 - Import foreign config with 2 drivers with SMART errors and 1 total fail?

We have a 12 drive, 40 TB storage bay that all of a sudden encountered multiple drive failures On RAID 5. One drive we have replaced outright, while another two have SMART errors. When the drives ...
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BTRFS RAID5 disk failed while balancing

If you clicked on the link to this topic: Thank you! I have the following setup: 6x 500GB HDD-Drives1x 32GB NVME-SSD (Intel Optane) I used bcache to setup up the SSD as caching device and all ...
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RAID 5 Windows 10 Host OS Running CentOS-Linux in VirtualBox

This is my first time using a Virtual Machine so please forgive my ignorance. My computer is running Windows 10 and then in VirtualBox I'm running CentOS. I have 3 new 1TB HDDs. I want to run the 3 ...
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Is software RAID5 or zraid1 inherently hard on drive hardware under CentOS 7 Linux?

I have had persistent issues using externally mounted hard drive arrays under CentOS 7, whether attached through a USB3 connection or eSATA, where the data format used the single redundancy in a 5 ...
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What actually happens during a RAID 5 expand?

I have just started the expansion of a RAID 5 from 3x3TB to 4x3TB in a Synology. This is all very easy, a few clicks and it’s doing its thing for next few days. But, what actually happens during a ...
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How to diagnose/fix slow file management on Windows Server 2012?

The setup is: FUJITSU PRIMERGY TX300 S7 RAID Ctrl SAS 6g 5/6 512mb (d2616) Windows Server 2012 64 bit Volume C: RAID 1 (2 HDDs) Volume D: RAID 5 (8 HDDs) The problem is: When we do ...
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RAID 5 Array: Probability of Failing to Rebuild Array

I have a Qnap ts463u-rp data storage array, which contains 4x4TB HDD. my question here is, is it safe to configure 3x4TB as RAID 5? because from what I understood, it's not recommend to configure ...
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RAID5 mdadm faulty / blk_update_request: I/O error

I have five raw images of a server's disks (stored on one external HDD). Each of those disks contains two partitions which are "Linux raid autodetect" (fd) and are members of RAID1 (boot-related; 3 ...
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Personal RAID5 long run maintenance

I'm considering to build a RAID5 storage from three 8TB hard drives inside my PC being run under Windows 10 Home (if it matters). In my motherboard's manual I can see instructions how to setup RAID5 ...
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1answer
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Is it safe to transfer files to a raid 5 array while it is re-synching?

I have a newly created raid 5 array in windows server 2008 (software in windows disk mamanger) and it is resynching... Is it safe for me to start transfering/copy files to the volume while it is ...
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Is there a way to replace RAID 5 drive without failing it first?

I have a software RAID-5 made up of 3 drives, call them A,B,C. I would like to replace the old C drive with a newer and larger-capacity one to eventually expand the array. This is on an Ubuntu 16.04 ...
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145 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 ...
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BTRFS Raid 5 - Replace disk with SMART errors

Can someone explain to me the steps i have to take to replace a disk in a raid5 btrfs stetup? I' have a setup with 8*3tb disks and one disk displays smart errors. I have a replacement disk of the same ...
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Storage Spaces out of space

I'm using Windows 10 Enterprise. I have four identical 3TB disks set up in a Storage Space pool. Each disk shows up as providing 2.72 TB to the pool. I create a storage space with REFS and resiliency ...
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What will happen with my RAID5 after motherboard change?

Currently I have ASUS P5Q-EM and 3 HDDs in RAID5 using its on-board RAID controller Intel ICH10R. I want to buy new motherboard, for example, Gigabyte GA-EQ45M-S2 which also has on-board RAID ...
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Should I use “Raid 5 + spare” or “Raid 6”?

What is "Raid 5 + Spare" (excerpt from User Manual, Sect 4.17.2, P.54): RAID5+Spare: RAID 5+Spare is a RAID 5 array in which one disk is used as spare to rebuild the system as soon as a disk fails (...
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1answer
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LaCie NAS failed - Recover Raid 5 From bad device

here is my problem: I have a 5disk (Seagate 2To) RAID5 working with a NAS LaCie 5big. Each disk is still working but the NAS device has failed and it refuses to boot with HDD inside (LaCie helpdesk ...
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How to setup RAID 5 in Windows 7

How do I setup RAID 5 for Windows 7? I tried it before without success. Is there third -party software or something that's required? When I try to click on RAID 5:
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BitLocker Raid5 encrypted disk was moved to another server of the same type

Has anyone tried or simulated moving a Raid5 encrytped disk (BitLocker) to another server with same family? What are your observations and what was the impact? For example: the server RAID disk(1x) ...
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Setting up a RAID 5 Array

I am currently trying to convert my drives from just a bunch of external disks, each one individually shared from my (CentOS) server into a RAID array (ideally, RAID 5). At current, my drives are: 2....
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How to force mdadm to stop RAID5 array?

I have /dev/md127 RAID5 array that consisted of four drives. I managed to hot remove them from the array and currently /dev/md127 does not have any drives: cat /proc/mdstat Personalities : [linear] [...
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mdadm wont mount due to checksum error

I have ubuntu raid5 on 4 disks of 1tb disks which had no dirty shutdown or power issue. The bootdisk is 5th disk which is not on mdadm. I also have XP on my bootdisk which I just started today. XP ...
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959 views

Is there a straightforward (or even not straightforward) way of shrinking a volume on Synology?

I have a 4-bay Synology with a 4x1TB RAID-5 volume that has been up and running without issues for 3-4 years. Of the slightly less than 3TB capacity about half is used. Now, because RAID-5 doesn't ...
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How to reformat a single RAID 5 disk for normal use?

I have a few RAID 5 disks from a computer that broke and I’m wondering, I have them all plugged in but how do I reformat them for normal use? My Linux machine doesn’t even pick up the devices. Just a ...
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How to calculate the final RAID size of a RAID 5 array?

What is the formula for working out the final RAID size of a RAID 5 array knowing the number of disk and the size of each disk?
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ReclaimMe Recovery of the Table used to identify member disk in RAID 5 array

I have seen this issue posted on many forums with only one possible solution (suggested below) and before I attempt I thought the community could weigh in on this solution and then we can share it ...
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531 views

Restoring Raid 5 Meta data / Table

2 part question at end of this text My problem: My CMOS was cleared, BIOS was set to IDE instead of RAID. My understanding (from other sites) is that motherboard Intel ICH10R data is stored in BIOS ...
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Issues mounting a RAID5 in ubuntu

I've been trying to access the contents on a RAID5 for the past 2 days. Although it looks like the information is there when getting the array details, it doesn't show any files when mounted. I first ...
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RAID 5 Drive Failure Data

I know that RAID 5 allows for 1 drive to fail, but I can't find information if the data on the failed drive is accessible while the array is degraded. Would you still be able to access all data with 1 ...
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309 views

Expand my RAID 5 volume without losing the data

In HP ProLiant ML-370 G6 (Windows Server 2008 R2). I have three HDD 147 GB each in my existing array RAID 5. Now I want to extend the existing array by adding two more 147 GB each extra HDD but I don'...
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RAID5, Can you clone the drive and access the media from Windows?

So my server is about to die and all of a sudden my RAID5 isn't accessible anymore. Is it possible to access the files on those drives some other way? Like maybe plugging them into another comp, ...
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In a RAID 5 disk array, does recovering a drive increase chance of another drive failing?

If you have a basic RAID 5 array of 3 or more hard drives, and one fails, does this increase the chance of one of the other drives failing and making the full recovery impossible? If every one of the ...
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880 views

RAID 5 Recovery Reset CMOS and drives show up as 2 Member 4 non-Member

How do you restore a raid array (not part of your C drive) after resetting BIOS and installing a new C (Windows) drive. My setup: (its a LOT of data, i cannot afford to lose it, most of it is ...
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Bad superblock on /dev/md0

I have an mdadm RAID 5 array running on Debian Wheezy. It's comprised of 3x 2TB drives. I've obviously done something stupid, because now I can't mount it and it's throwing up the following error: ...
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mdadm: safest way to grow RAID 5 (4x2TB) with 2x4TB

My situation:I am currently running a RAID 5 with 4x2 TB disks and would like to grow the array with 2 x 4 TB disks. The goal would be that there is a RAID 5 with 4 x 4 TB (the two 4 TB disks and two ...
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How is Data Recovered when a RAID array fails

I am thinking of using hardware RAID (levels 5 and 10) on my computers. What I don't get is how is data recovered when something goes bad and the RAID array fails (RAID Card problem or anything else). ...
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I Have A Raid 5 Trouble

Hi my Raid is going crazy. I Have a Raid 5 with 4x 3TB Drives and one drive dropped out. So I popped it back in and everything worked Fine But i Had run this and noticed that the Drive was not used. ...
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QNAP TS 410, is it rebuilding RAID?

The QNAP TS-410 had a failed disk the other day and went into degrade mode. So I bought a new disk. Former disks were Seagate, but I bought a Western Digital now which it approved by QNAP in its ...
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484 views

QNAP TS-419U+ Raid5 not rebuilding

I replaced the hard disk number 1 on a QNAP TS-419U + with RAID5. It is a hot-swapping replacement without turning off the machine. It was smart of the new HD is good, but it was not added to Raid 5. ...
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broken LSI raid controller: how to make a safety copy of the disks before anything else

My friend has a SuperMicro server where the RAID controller all of a sudden seems to be broken (after a shutdown, drive swap, and startup). It shows "RAID Adapter Memory Error!!! Please check the ...
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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 ...