Questions tagged [raid-5]

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

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117 views

How to scan and repair RAID 5 using mdadm

Raid5 on a server is having problems the last two times I rebooted. CentOS does boot up after 10-15 minutes. Is there a way I can scan the raid and repair it? I was reading the man page and mdadm --...
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218 views

Dell R710 RAID PERC H700 Foreign Configuration(s) issue

Just getting around to setting up my server from it sitting some 2 years without plugging it in or running it at all. Now prior to it sitting I did have it running for awhile and I know it does run as ...
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Incorrect free space RAID 5 on Asustor AS1004T

I have an Asustor AS1004T NAS with 3 WD Red 3TB's in RAID 5. (WDC WD30EFRX-68EUZN0 in case anyone cares). This gives me a total volume size of 5.36TB. Recently one of the WD's became faulty and I RMA'...
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How to rebuild raid5?

I got raid5 in my server. it's made of three disks. I just got this problem today. my raid5 got "Degraded" status. then I inserted CTRL+I to get into the configuration of raid. and I chose ...
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How do I start my MDADM RAID5 array that's in the following state: active, FAILED, Not Started?

I have a home server and due to a blackout last night, now I'm unable start the array. How can I start the array without losing data? Here is every info I could gather: mdadm --detail /dev/md69 mdadm -...
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What does delta devices of the mdadm--detail output mean?

Here is an output of mdadm --detail: $ mdadm -D /dev/md2 /dev/md2: Version : 1.2 Creation Time : Wed Jun 24 16:41:17 2020 Raid Level : raid5 Array Size : 7809195456 (7447.43 GiB ...
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114 views

Synology NAS: Volume exceeded storage capacity limit

i have a synology NAS with a 32bit cpu and four 6TB hdd's (usable ~5.5TB). Those four disks are bound in a raid5 storagepool (diskgroup) of 16.0TB. This storagepool contains a single volume of 15.87TB ...
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RAID 5 with SSDs; how many and what class of SSDs to use?

I have a 850 EVO 250gb as win/programs/games disk and I am thinking buying more SSDs to go with RAID 5 in order to gain more speed. I know the pros and cons of RAID 5. The question is: 5 cheap 120gb ...
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87 views

RAID 5 rebuild failed after removing and reinserting a disk

I have a Synology Diskstation 414j at my home that runs RAID 5 across 3 drives. I was curious to see what Diskstation looked like on the inside, so I unscrewed the back, took out the drives, and put ...
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Reshaping RAID-1 to RAID-5 hangs forever

I have a problem with reshaping RAID level 1 to RAID level 5: it's been hanging at 41% for a few days now. Some background (verbose, since I don't know will end up being relevant; apologies). The ...
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How to migrate mdadm RAID10 with 4 disks to RAID5?

I have a software RAID10 based on Linux’ mdadm under Debian Buster. Originally I found RAID10 had best performance. But I need more space and accept to trade some write performance for +50% space. # ...
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HP Proliant DL360p gen8 Unrecoverable Media Error. Amber lights on 3 disks

I have HP Proliant DL360p gen8. 4 disk on RAID 5, 3 of them have amber light on them. I did chkdsk on my virtual machines none reported any error. Am I able to fix it without buying and replacing ...
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226 views

Ubuntu server RAID-5 failed, rebuilding fails

My Ubuntu server now fails to boot: It uses a RAID 5, and one of those drives failed. The OS is on the RAID array, and rebuilding now fails with the replacement drive. I can't post pastebins or ...
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RAID controller failure…! Can I just pop disks into another controller, same make and model(ish)

My Promise Smartstor DS4600 went pop! It has 4 drives set up as RAID 5. I have purchased a second hand Promise Smartstor NS4600, which I beleive uses the same hardware (Just has added network ...
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737 views

How to safely configure/use SW RAID 5 with Raspberry PI 4b / DietPi without data loss?

This question is also to clarify if I have a decent bug here, software or hardware. My aim is to set up a SW-RAID-5 to my Raspberry PI 4b system using a USB3.0 HUB with 3 4 TB Western Digital hard ...
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1answer
596 views

Recovering data from Synology NAS – RAID5, ext4, “number of reserved GDT blocks insanely large”

I have a 4-disk RAID5 array that had one of its four 3TB HDDs die. Being that RAID5 can tolerate a single drive failure, I'd like to try to operate the RAID5 without replacing the dead drive. (Run ...
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1answer
29 views

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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215 views

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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1k views

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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995 views

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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1answer
209 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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118 views

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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1answer
198 views

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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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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233 views

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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1answer
54 views

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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2answers
261 views

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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1answer
371 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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1answer
506 views

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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101 views

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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1answer
397 views

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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846 views

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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1answer
629 views

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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1answer
2k views

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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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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1answer
300 views

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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3answers
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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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1answer
565 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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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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543 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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507 views

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 ...
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235 views

How do I grow a RAID-5 Array?

I have a Highpoint RocketRAID 2720SGL, and I have a RAID-5 array with 3x 2TB drives, giving 4 TB of usable space. I'm adding an additional drive and I would like to move this to a 4x 2TB drive array ...
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RAID 5 - Server having 5 SATA HDD of 750 GB and 1 SATA HDD of 1TB size , will this combination support for RAID 5 and will RAID 5 work?

RAID 5 Configured on IBM Server, having 6 SATA HDD of 750 GB each/7.2K. Now we have one 750GB disk failure and we have replaced it by new SATA HDD but of 1TB size/7.2K. Wanted to know will this ...
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915 views

Win10 Storage Spaces - Missing capacity?

I'm confused. I have a "parity" Storage Space consisting of 4 x 3 TB drives in my Win10 file server (I think "parity" is roughly equivalent to RAID5). This should give me roughly 9 TB of usable ...
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32 views

Linux software Raid5 DegradedArray with mdadm

So I changed my case and I don't know why but one my SATA port does not work anymore. So only 5 of my 6 RAID5 disks were recognized. The volume was automounted anyway and I already wrote new files on ...
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62 views

I am obliged to format to build a Raid 5 array?

I have four identical Western Digital Elements 2TB which are all about 70 to 85% full. I would like to create a RAID 5 array by removing all the hard drives from the external boxes and by putting ...