Questions tagged [raid-5]

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

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RAID 5 - replacing failed disks with larger disks

I have a RAID 5 array with 12 disks, each 12 TB. It is controlled by a hardware RAID controller (LSI 9380-4i4e) on Windows Server 2012. As they eventually fail one by one, if I replace the failed 12 ...
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My BuffaloNAS LS-QVL stuck at Resyncing RAID

My BuffaloNAS LS-QVL 4bay / 1bay per 1TB lost raid5 so I try perform Check disk and then web ui stuck at page : "Checking drive... Progress: Progress" Since 9 Nov 2021 13:14:23 and then in ...
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RAID 5 bad sector / read error when rebuilding

Say I have a RAID 5 (Windows parity storage pool) and one drive fails. I will plug in a new one and start rebuilding. There are many people saying that if one of the remaining drives has a read ...
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What to do with a slow disk performance on a RAID5 volume on a Megaraid 9361-8i?

I have a server with a Avago Megaraid 9361-i and 2 logical volumes (RAID1 + RAID5) on a Windows Server 2016. It is used as a HyperV Server. It seams that we have a bad disk performance on our RAID5 ...
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Recoverability of Windows 10 storage pool (Software RAID 5)

I'm currently looking into RAID 5 for my growing data for my home PC and some things are still unclear to me. I currently have each of my drives backed up by an additional "backup" drive and ...
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Dell Poweredge Controller and ZFS

I've been looking at many different option for a home backup server. I'll going to be getting a dell poweredge r430. It contains a perc h730 mini. It has dated hardware, and I plan to pare it with ...
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BTRFS 56 snapshots safe?

If I understand correctly, in a multi-drive BTRFS cluster with RAID1 for metadata and RAID5 for data, a sudden loss of power may lead to a write hole, meaning that data (but not metadata) is lost. I'm ...
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MDADM array rebuilding after every reboot

I have just grown my RAID-1 mirror in to a RAID-5. After adding a 3rd disk, the array rebuilt successfully, but after restarting the array was showing as inactive, and the new disk (sde) had lost all ...
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mdadm RAID5 array with 3 drives - out of date - recoverable?

Had a powercut this morning for a couple of hours, on restart the RAID array was not automatically rebuilt. I've followed the information on https://raid.wiki.kernel.org/index.php/RAID_Recovery and ...
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33 views

PC stalls and eventually crashes

I am home for the holidays and my father is having computer issues I was asked to fix, but am unsure of how to fix the issue. I have a server running Windows Server 2008 R2 Standard edition that has 5 ...
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Clone harddrives in raid5 configuration to larger hadrdrives

If i sector clone 3 disks (2 x 3tb and 1 x 4tb) that have a raid 5 configuration to 3 new disks (3 x 4tb), will the raid 5 configuration work on the new disks right away, and put empty space at end of ...
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Proxmox and Hardware RAID, which storage type

Proxmox and Hardware RAID, which storage type must use? I have been building a "Production environment" for apps 24x7, 3 IBM server, LSI raid card for RAID 5 on each one (for fault tolerance ...
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386 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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331 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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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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257 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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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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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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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
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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
32 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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418 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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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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1answer
327 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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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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1answer
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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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498 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
483 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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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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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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436 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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942 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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878 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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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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358 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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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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