Questions tagged [raid5]

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Installing Ubuntu 20.04 (server) as software RAID with three disks

I have a small PC that I'd like to use essentially as a NAS. It has three 2TB drives. I don't know if this is even possible, but I'd like to use software RAID to somewhat secure the data stored on it....
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Can you grow a VG made up of a hardware RAID-5 disk

I have Ubuntu 18.04 LTS installed on a Dell Poweredge system. The PC was set up with six hard disks inside it, and the person who did the install created two VGs. The O/S VG (rootvg) is made up of two ...
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40 views

Trouble after upgrade 16.04 -> 18.04 - device mapper?

After upgrade my ubuntu 16.04 to 18.04, I have trouble : server no more boot. I have use "do-release-upgrade" , no particular warning during upgrade process. On this server, my partition home is ...
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Problems installing Ubuntu 16.04 but not 14.04 on hw RAID5

I have a DL360 server with 4x1.8TB of SSD configured with hardware RAID5. When I install 16.04 (and prompted to reboot after what seems like a successful installation), the server (RAID configuration) ...
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81 views

Added new larger disks to mdadm raid 5 array

Found a cracking deal on two wd red 12tb disks the other day. Purchased them with the intention to add to my raid 5 mdadm array. My current array is made up of 6 drives, 1 4tb the rest 2tb the array ...
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1answer
90 views

Creating ext4 filesystem on 20TB Raid5 is still running - has it stalled or is this a very long process?

I have a 20TB (4x5TB) RAID5 aray (please hold comments about RAID5, I know a lot of people don't like it) that I recently setup, through Webmin, on 18.04.3LTS ubuntu server. I am not creating the ...
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1answer
90 views

RAID5 won't mount on boot

I have 4 working RAID5 installed on Ubuntu 16 and cannot find out HOW to option them to mount on boot. They are both DOS and GPT and work fine when mounted manually.
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Is Dell PERC H330 for RAID 5 compatible with a dual-boot Ubuntu and Win10 setup?

On my current setup, I have Ubuntu 18.04 and Windows 10 in dual boot. On Ubuntu, I have created a software RAID 5 with mdadm. I have had this setup for years, and never had a problem. However, I am ...
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1answer
52 views

How to wipe a RAID 5?

I want to wipe all data from a raid5 but continue using it afterwards. A single pass of overwriting would be enough. How can I do this? Would this wipe only the data, or also the raid superblock? dd ...
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1answer
882 views

Ubuntu MDADM raid drive failure?

I have an QNAP running Ubuntu and the drives in an MD software-raid, but after a reboot, the server went to emergency mode (which I recovered from by removing the raid from fstab). (The front LED's ...
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1answer
62 views

MDADM fresh install disk failure

I'm having a unique mdadm issue. I have an 8 disk raid5. (storage, not boot disk). I sold the computer, so I put a fresh install of ubuntu on it. In that time, one of the drives died. So there ...
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1answer
176 views

How do I partition a drive using GParted ready for Ubuntu Server?

I am using an 8 core PC with 4x 500GB drives to make a small storage server. It just for e-mails and files that should be deleted by the pack rats in the office won't let them go. Originally, I was ...
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868 views

How can I recover a raid 5 single disk or entire array?

I have three disks that where part of an array on a debian box that will no longer boot. Im have installed them in a ubuntu 18.04 box and am attempting to mount them but get the error "can't read ...
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37 views

Ubuntu reports incorrect available space on HFS external RAID

I have a Stardom 24TB external RAID formatted as HFS+. It shows up as a 24TB disk, but available space is only 66GB when only 6.4TB is used. When mounted in MacOS I get the correct amount of available ...
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1answer
206 views

Motherboard cannot see Raid Array 3ware 9650SE

Firstly, I'm new to Servers, Hardware and Raid, so please be gentle. I am constructing a server with the following specs: - Motherboard: Asus M5A97 rev 1.02 - Memory: 32GB - Drives: WD20EARX (2GB ...
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383 views

Will my mdadm reshape operation complete?

I was adding an additional new drive to 4 drive raid 5 mdadm array. During the process that new drive was marked as faulty, along with one of the original 4 working drives. From looking at logs I see ...
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1answer
1k views

Change disk in raid 5 system

I have installed raid 5 on my Ubuntu server (software controller). I've used a 250G and two 1TB disks for it (I know it's quite a waste of memory). Can I replace the 250 G hard disk with a 1TB hard ...
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139 views

Disk drive for /mnt/hogwarts is not ready yet or not present

Note: I'm a hardware and Ubuntu newbie so I may need hand holding. Problem: I have a RAID 5 that someone (I moved away so they aren't accessible) set up for me. I tried to turn on my server again ...
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1answer
972 views

How to install bootable Ubuntu 16.04 64-bit RAID 5 with 4TB HDDs on an UEFI/GPT system?

Is there any step by step instruction to install "bootable" software RAID5 with 3 HDD of 4TB each? I tried many way to install this. No problem install raid5 but I couldn't boot. (HDD: Seagate ...
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1answer
149 views

Combine/Extend 2 raids

I have two Raids, raid5(md0) and a raid1(md128). How can I extend "/"? OS is now on raid 5. root@backup:~# cat /proc/mdstat Personalities : [raid1] [raid6] [raid5] [raid4] [linear] [multipath]...
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100 views

Cannot create RAID5 Ubuntu Server 14.04

I'm trying to configure RAID5. I know this question has been asked before but I have been stuck on this for 3 days. Input: sudo mdadm --create /dev/mdo --level=5 --raid-devices=3 /dev/sdb1 /dev/sdc1 ...
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1answer
858 views

RAID 5 status = “Initialize”

I recently built a PC and loaded 14.04 on it. My motherboard (ASRock z97 Extreme 4) has the capability to run a RAID array built into it (pardon my terminology if I'm wrong, I'm not really that good ...
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1answer
41 views

Softraid 5 Ubuntu

I have installed a raid 5 on my ubuntu server 14.04 and I want to know how I replace a hard disk and make it recover/build on that HDD. My setup is 4 1tb hard disk in raid 5. No other HDD's or SSD's ...
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1answer
2k views

re-assemble out-of-date raid5?

I need help with my raid5 after it crashed through bad sectors. Previously I could re-assemble it with # mdadm --assemble --force -v /dev/md0 /dev/sde1 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1 but ...
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467 views

Slow raid5 resync with WD Green drives [closed]

The Question Why is my initial resync so slow? Initially cat /proc/mdstat reported ~ 30000K/sec. I then increased /sys/block/md0/md/stripe_cache_size from 256 to 16384. That increased the speed to ~...
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1answer
532 views

Determine RAID 5 config on ubuntu server. Was it hardware or software RAID 5?

I am not an experienced Linux or Ubuntu user. I do have many years of software/hardware tech support experience. A customer brought in a DOA Dell Precision 670 Workstation that was set up as a web ...
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1answer
7k views

md0: detected capacity change from 0 to… md0: unknown partition table but the system boots up [closed]

So I had a problem with my server running Ubuntu 14.04 and 3x1T configured with a software RAID. I forced mdadm to mount the RAID with two disks only, I added the missing disk back to the RAID array ...
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0answers
181 views

Help with RAID5 array - gone after reboot

I'm newly back to Linux after >20 years. First install was with a beta kernel in ~1992. I've build a home media server with a 4-drive RAID 5 array with the latest workstation version of Ubuntu (...
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2answers
399 views

Valid SSH command to create a RAID5? [closed]

Valid SSH Commands for creating and rebuilding RAID5 with 4 drives: To create a RAID5 with 4 hard drives: mdadm --create /dev/md1 --level=5 --raid-devices=4 /dev/hd[abcd]5 To rebuild a RAID5 with 4 ...
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1answer
2k views

Software RAID 5 Disk Failure

I'm going to need some expert help - free beer/coffee to anyone who get's me on my way! My System I'm running Ubuntu 11.10 with a 3 disk software RAID 5 configuration, with 3TB hard drives, in ext4 ...
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1answer
447 views

Bash script to check if mdadm is installed if not install it

I am currently working on a bash script to create raid5 with 3 disks and one hotspare. I am confused of how to create a script which first check if mdadm exist, if not it will install it and name it ...
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3answers
21k views

How can I mount software raid drive mdX with fstab

I have raid5 configure with gpt partition to allow working with drive larger the 1.6 TB Ubuntu version is 12.04 and the md drive is 5TB. with: mount -t ext3 /dev/md129 /images mount works fine. ...
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1answer
653 views

When I mount my RAID5, there is constant activity; how can I figure out what it is?

there. I'm using Ubuntu 13.10 64bit. I have a 4-disk RAID5 (3 disks, 1 spare) setup, and it's completely synced/built, and the ext4 filesystem it contains is clean. When I assemble the RAID, all is ...
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1answer
3k views

Why is GRUB failing to install?

I'm trying to install ubuntu Server to a RAID5 array. I have three, 3Tb disks, each with a GPT partition table. I have set up my partitions as follows: /dev/sda 1. 512 Mb physical RAID volume 2. 3 ...
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1answer
2k views

RAID 5 won't mount

I have a qnap NAS which is running a version of ubuntu and I'm not getting any help from their forum so I thought I'd ask my question here. I "had" 3 2TB HD's in a raid 5 configuration. When I got ...
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1answer
1k views

Ubuntu Server cannot boot - HDD problems

I have major problem, my Ubuntu Server won't start up after reboot, guys in Hetzner datacenter started recsue sistem up and found out this on sda: -----------------%<----------------- 5 ...
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1answer
159 views

13.10 with Raid 5 mount issues

I have installed Ubuntu 13.10 onto an HP Proliant Microserver with a Raid 5 configuration. Using Mdadm, it found the raid and now auto mounts when I reboot...but...the actual folders aren't appearing ...
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1answer
515 views

Mdadm RAID 5 failed, 1 drive bad 1 good 2 working

Sorry if the title was a little confusing but I wanted to show a little info. So I went to turn my pc on and ended up with the nice screen of having a failed array. /dev/sdb1 and /dev/sde1 are within ...
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1answer
468 views

Raid 5 mdadm --grow drops performance, no increase in disk size

I've set up a Raid 5 system at home for the first time. I've added 3 disks into the pc, and parted them all in 1 partition of 8G, and 1 partition of the remaining 492G then I made 2 raid volumes with ...
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1answer
877 views

recovering raid5 (mdraid) after clean OS install (Ubuntu Server 12.04)

======== After having to reinstall the OS I am having trouble accessing data stored on a RAID5 group built on 8 HDDs using mdraid. Advice much appreciated! I have a DIY home NAS server built on ...
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1answer
492 views

Ubuntu Server Raid Install

I am installing Ubuntu Server 13.04 on an ICH9R raid controller with 1tb of space (5 250gb Raid 5). Everything goes fine until the point of installing Grub. It will not install grub to anywhere but ...
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1answer
459 views

How do I install 13.04 alongside windows on an Intel Raid 5?

Whenever I try to install Ubuntu I run into issues. All the live CD's don't display the Intel raid 5 and show multiple drives. When I tried the 12.04 alternative, And the Raring Minimal ISO. The raid ...
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1answer
109 views

Upgrading from Ubuntu 32 bit to 64 bit with software raid

I'm currently running Ubuntu 13.04 32 bit. I'd like to move to 64 bit and everything I've read has stated that I should probably completely reinstall to do so. I have my OS on a 1GB hard drive and ...
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1answer
617 views

Which version of Ubuntu support HP ProLiant ML350e Gen8 Server?

Which version of Ubuntu support HP ProLiant ML350e Gen8 Server ?? will in future versions of ubuntu , the raid 5 will be supported ?
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102 views

Raid Partition Setup

I have 4 drives that I would like to install a RAID 5 on. 1) 80GB 2) 2TB 3) 2TB 4) 2TB Can someone help me figure out what the partition setups should look like? I am installing ubuntu server 12.04 ...
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1answer
2k views

Install ubuntu server 12.04.2 LTS with RAID 5 [duplicate]

I'm currently installing Ubuntu server 12.04.2. The hardware is as follows : 1 500Gb HDD for Ubuntu 4 3Tb HDD's for the raid 5 array. I'm just wondering : during the partition part of the install, do ...
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1answer
515 views

Copy a “bad” GPT partition table to another drive

I'm trying to copy a GPT partition table. To make a long story short, I had a RAID5 on 4 drives (Intel Matrix Storage Manager, not Linux software RAID). What I have now is: 1 empty drive 2 drives ...
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2answers
21k views

NAS Raid 5 Recovery using mdadm: volume and mount issues, please help

Hello this is my first foray into ubuntu, or any form of Linix for that matter, as well as my first attempt to ever recover a lost a raid, but I'm a fairly quick study. I have an 8TB WD Sharespace, ...
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1answer
9k views

grub error: out of disk when booting 12.04 server with hardware RAID5 and gpt

I'm trying to do a new install of 12.04 server on one node of a Dell PowerEdge C6145 with the following spec: 48 cores 512GB RAM LSI MegaRAID 9265 controller 4x2TB disks, configured with RAID5 giving ...
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2answers
2k views

Activate spare for RAID-5 in Disk Utility

I have a RAID-5. I'm trying to replace a failing drive in Disk Utility GUI. I added a new drive as a spare, then did "Remove Component" for the failing drive. How do I tell it to actually use the ...