Tagged Questions

RAID stands for redundant array of independent disks, and allows for disks to be linked in various ways. Common RAID setups in Ubuntu are a hardware RAID, FakeRAID and software RAID.

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99 views

How to force update-grub to use UUID?

When I run "update-grub", the file "grub.cfg" will contain lines like this. menuentry 'Ubuntu...' { ... linux /boot/vmlinuz... root=/dev/md124 ... ... } For the line of linux, is it ...
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0answers
34 views

How to rebuild mdraid metadata?

I somehow hot swapping a failed hard drive on Ubuntu 14.04 LTS Server running mdraid RAID1 array without marking the failed drive to fail and remove it via mdadm. I successfully add another drive on ...
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53 views

What version of MegaCli should I download for H710p?

I am using Dell Perc H710p adapter. When trying to download MegaCli from LSI, someone suggested to check the parameter like. % lspci -v | grep LSI When I run this command, I got. 03:00.0 RAID bus ...
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1answer
413 views

Ubuntu 14.04 + Dell Precision T7500 = not bootable?

Environment Ubuntu 14.04 Desktop 64-bit Dell Precision T7500 2 x Intel Xeon X5690 @ 3.46 GHz 96 GB RAM Quadro NVS 420/PCIe/SSE2 Video Card built-in SAS RAID controller Disk Configuration 2 RAID ...
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0answers
32 views

Ubuntu server installation - partition can't finalize

I need help on ubuntu server installation. Just can't pass the partition section. I have 3 hdd 2 with raid 0 from bios and 1 for the operating system. in my previous kubuntu setup , home directory ...
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1answer
160 views

SSD is not showing up in boot loader installation device list while installing ubuntu 14.04 alongside windows

I've windows 7 installed in my SSD and trying to install ubuntu 14.04 in same SSD drive. But when I try to install ubuntu alongside windows it shows only HDD in the drive selection list. If I try to ...
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1answer
968 views

btrfs for deduplication and compression at the same time?

I'm thinking about using btrfs functions for both deduplicate and compress my storage... My question is: is it efficient? I mean, does it deduplicate AND compress at the same time efficiently?! I'm ...
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0answers
30 views

Problems booting windows and ubuntu

I just installed Ubuntu on a Windows 7 machine and Windows will not boot. A few notes: This computer is connected to RAID and another HD. I installed ubuntu on the nonraid drive and windows is on the ...
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0answers
306 views

Failed to install GRUB on a separate '/boot' partition on a fake RAID 0 (12.04LTS)

I'm having some problems getting GRUB configured for Ubuntu 12.04LTS on a fake RAID 0. I can either get the GRUB rescue prompt at startup, or just a GRUB prompt but I cannot boot to Ubuntu manually. ...
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1answer
78 views

RAID device not detected

I create RAID10 using "mdadm --create ... --metadata=0.90 ...". There are four partitions which I name from /dev/md128 to /dev/md131. First thing strange is that mdadm automatically changes them from ...
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1answer
83 views

Raid10: how to tell which disks are in mirror?

When I do "cat /proc/mdstat", there seems no such information as to tell which disks are in mirror. % cat /proc/mdstat md126 : active raid10 sda1[0] sdd1[3] sdc1[2] sdb1[1] ... near-copies Thanks ...
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1answer
49 views

How to restruct RAID 10?

We would like to alter the partition without losing data. Here is the sketch of the plan. I am wondering if it is doable using mdadm; and if so, please kindly point some reference on how to carry out ...
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2answers
137 views

shrink ext4 partition on raid 10

My question is similar to Move ext4 partition, but the challenge I couldn't figure out is how to shrink a partition from the start. So suppose originally the partition (with raid) is like this. ...
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1answer
93 views

Automated installation of “ubuntu-12.04.1-server-amd64”

The physical server contains two HDD, and Raid1 mirror relation has been established between them as shown in attachment. In ks.cfg , the information related to partitioning as as follow: #Partition ...
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0answers
43 views

Error on choosing location while freshly installing 14.04 [closed]

I'm trying to install 14.04 on my desktop and am running into this error after going through the partitioner. Error screen: Additional information: My system has da fake raid array (Raid 0). ...
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2answers
272 views

NAS running Ubuntu / Raid 5 / SSD cache

I'm about to setup a NAS - planned hardware so far: MB: ASUS P9D WS(*link1): sry, it's german, it says th MB supports Hot-Plug in AHCI or RAID Mode, supports Intel Smart Response (SSD Caching) CPU: ...
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0answers
405 views

RAID1 “conflicting device node” message on startup

I'm dual booting Win8.1 and Ubuntu 14.04 (Gnome Classic). I have RAID1 set up (on Asus Z87-A motherboard) with Win partition, Ubuntu partition, and NTFS partition for data. On Ubuntu startup, I see ...
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0answers
100 views

RAID6 will not reassemble with 2 failed disks

Relevant photo album Hello all. I have a file server running ubuntu 12.04 (See first picture) with 6x Seagate 3TB HDDs in a RAID 6 configuration (giving 12TB of storage). This is a software RAID, ...
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0answers
1k views

Ubuntu 14.04 Manual Hard Drive Partitioning Help Needed

I'm in need of some assistance with manual partitioning from the Ubuntu 14.04 install GUI. I'm trying to do a fresh install of Ubuntu 14.04 desktop. I have a 60GB SSD as that I want all my OS files ...
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1answer
854 views

GRUB install fails on software RAID

I've been trying to install Ubuntu 14.04 on two 30GB SSDs (OCZSSD2-1AGT30G) with an ASUS motherboard (ASUS DSBF-D). I tried installing on both of the drives separately and it seemed to work fine. The ...
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2answers
407 views

GPT talbe corrupt after RAID1 setup

So I'm completely new to Ubuntu and am trying to set up a backup/media server at home. I saw the guide on Lifehacker and figured I'd give it a try. My system is an i3 3225 on an Intel DH77DF mobo ...
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0answers
223 views

btrfs two Data sections and enospc error when trying to convert

I currently have a btrfs filesystem setup like this: # btrfs fi df /storage/ Data, RAID1: total=2.33TiB, used=2.32TiB Data, RAID0: total=2.00GiB, used=2.00GiB System, RAID1: total=32.00MiB, ...
2
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1answer
358 views

Is it possible to pause/abort mdadm reshape?

Saturday I added a new drive to my mdadm array, and the reshape process is taking a long time. Unfortunately there's a nasty storm coming, and I'm likely going to lose power, which will probably do ...
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0answers
30 views

Failure proof logical volumes on heterogenous bunch of irreliable hard disks

Like I guess most people do, I have accumulated an assortment of various hard drives over the years. They are mostly of different size, manufacturer, speed, etc. There are too many off them to put ...
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0answers
29 views

Upgrading and recovery options with software raid 1

I recently installed Xubuntu on a spare machine that is serving as a NAS, voice communication, and hosting various other services. I have a 120GB SSD containing the OS and 2 4TB drives configured as ...
0
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1answer
693 views

Can't mount RAID after upgrade

I just upgraded my box to 14.04 and on bootup I got a message, that my RAID devices can't be mounted automatically so I chose to skip it and work through it after boot time. Now booted up, A mount -a ...
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2answers
27 views

new 12.04.4 Raid0 faulty install; malformed gui & erratic mouse

UPDATE2: #irc says 12.04.4 alternate not supported and Quadro NVS 450 not well support. Trying V14.04 now (for RAID0 & hopefully better gpu drivers)... UPDATE: reinstalled. no swap partitions. ...
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0answers
277 views

Strange output of btrfs fi df after converting from RAID0 to RAID1

I just converted my 3 disk btrfs filesystem from RAID0 to RAID1 and balanced it. At first the data was all in the RAID0 filesystem, so running btrfs filesystem df showed something like this: (XX are ...
3
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0answers
559 views

Does Ubuntu 14.04 support SSD TRIM on Software RAID? [duplicate]

I'm using the softwareraid (mdraid) RAID1 on 2 Intel SSD DC S3500 and I found there's a fstrim job on cron.weekly. Does it mean Ubuntu supports it? I could not find any article saying that SSD mdraid ...
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2answers
193 views

Poor SSD RAID0 write performance, alignment on raid?

We have Samsung840Pro 512gb x2 connected to the motherboard's c600 6gbps SATA3.0 ports. The RAID partitions use 100% of each disk: user@blockparty ~ $ sudo fdisk -lu /dev/sdb Disk /dev/sdb: 512.1 ...
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1answer
498 views

One SSD and two HDD. Install on SSD and RAID 0/1 or LVM for HDDs?

I would like to install Ubuntu 14.04 on my PC, but I'm uncertain on what would be the best for my setup. I have a 128GB SSD (Crucial M4) and two 500GB HDDs. Currently I'm running Windows 8 where I ...
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0answers
324 views

Ubuntu 14.04 Trusty with UEFI + Software RAID1

How to install Ubuntu on UEFI BIOS with Software RAID1? Should there be 1 partition for EFI and another partition for RAID1 (root+swap) on each drive? I wonder how it will update one EFI partition ...
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1answer
74 views

Bootstrap mdadm RAID6 server via USB flash

On my Ubuntu Server 14.04 I have large mdadm RAID6 array, and tiny boot HDD. I want to get rid of that boot HDD, and boot system from USB flash drive. Although I know it is possible to install ...
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2answers
82 views

Cannot replace missing disk in raidz

My raidz is degraded after the change of my motherboard - a disk cannot be found. The missing disk used to be /dev/sdh but now it is named /dev/sdg - which is the cause of the problem. In the ...
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0answers
211 views

Installing and booting Lubuntu on ReadyNAS with Btrfs

I have NetGear ReadyNAS Business Pro with 6 Place for 6 Disks I did a hack the box (basically it is a normal PC with Intel CPU) I upgraded the CPU and I used the ReadyNAS OS 6 (which is Debian ...
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0answers
177 views

How to configure and run mdadm RAID with /boot and /boot/efi

I am finally getting around to setting up RAID on my existing Ubuntu 12.04 box. This is my first time with mdadm and I have read several tutorials and I believe I have the basics of the RAID part ...
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1answer
938 views

mdadm warning (system unbootable) from update-initramfs, mkconf's suggested fix seems inconsistent with mdadm's description of problem

Summary: update-initramfs says system unbootable, message points to mkconf which suggests rewrite to mdadm.conf that would appear to break the RAID, system up (for now) but next reboot may kill it, ...
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0answers
43 views

Investigating RAID-related issue that caused data loss while using LiveUSB

I recently tried to install Ubuntu on one of my hard drives and something went seriously wrong, resulting in 400+ GB of data being lost. Frustrated as I was, I've decided to try to find out what ...
2
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1answer
6k views

Dual-Boot Ubuntu 14.04 and Windows 7 on FakeRAID Installation error - question marks “????…”

I am trying to install Ubuntu 14.04 on FakeRAID along Win7. Win 7 has been already installed, and dmraid is running. During the installation I choose to manually partition, this is the structure: ...
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2answers
481 views

formatting and mounting a 32 TB RAID 50 disk

I want to know how to format a 32 TB drive. What program should I use and what filesystem? The largest drives I ever had to map before are 2-3 TB and I always used fdisk for formatting. But fdisk is ...
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0answers
353 views

Raid5 can't start degraded, dropping to shell

Already posted about this here: http://ubuntuforums.org/showthread.php?t=2219141 but thought I could post here as well, in hopes that it would increase my chances of a solution :) I've been running ...
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0answers
378 views

btrFS RAID5/6 Understanding space usage and usability

Im currently thinking about experimenting with btrfs with my workload in place of ext4. Right now I have a few drives on order. I want to setup btrfs on the first drive and slowly expand the FS ...
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0answers
27 views

Fresh install of 12.04, boot problem after updates

This desktop has a hardware raid, for which the BIOS settings is "legacy." Fresh install. Then, when I enter the following command: sudo apt-get update update happens. The computer runs fine. ...
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1answer
687 views

HP ProLiant ML350e Gen8 - Ubuntu 14.04 LTS

I was researching about new Ubuntu Server 14.04 LTS and the Proliant ML350e Gen8 with B120i RAID controller. I found that HP certified Ubuntu without RAID engine on 12.04 server version, but now I ...
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0answers
227 views

Install Ubuntu 14.04 Only /dev/sda Showing

I'm using the live CD to try and install Ubuntu 14.04 on my old desktop. The two disks were previously part of a RAID array (of 3 disks, RAID , 1 degraded and couldn't be bothered rebuilding for an ...
0
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1answer
1k views

Grub2: Disk not found trying to boot LVM partition on raid1 set

I'm having difficulty booting from an LVM logical volume which is stored on a raid-1 physical volume. Using Ubuntu 13.10 and Grub2 2.00. The setup is that /boot/grub is on a physical raid-1 set. ...
0
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1answer
104 views

Samsung 840pro SSD in RAID0… caveats?

We have a SuperMicro X9SRI-F-O board that has two 6gb/s SATA3.0 ports. We currently have a single Samsung 840pro SSD hooked up to the first SATA channel. We want to double the storage and bandwidth by ...
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3answers
5k views

Problem installing 14.04 in VMPlayer

I'm just trying to install Ubuntu 14.04 in VMWare Player. It has a single huge (300 GB) partition and so I expect it to take some time, but after a few minutes, this message came I'm unsure what ...
3
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1answer
7k views

Install Ubuntu Desktop on Software RAID 1 (mirror) with encryption

I used to use Ubuntu 12.04 Alternate installer to setup my old RAID1 + encryption system. With the new LTS 14.04 (beta 2) I found the alternate installer missing which complicates installation on a ...
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0answers
82 views

How do I get GRUB to install on a RAID array? [duplicate]

I am trying to build an Ubuntu desktop machine with RAID array, and am having trouble with the installation of GRUB. The 2 10GB HDDs are partitioned using sgdisk (invoked by a script to ensure ...