Redundant array of independent/inexpensive disks; a technology which utilizes multiple disks to provide increased reliability, performance, and/or redundancy. Can be implemented either in software or with a hardware controller.

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How do i prevent lilo from doing a disk scan?

I have gentoo installed using root on LVM on RAID5. I made a mistake when I set up lilo but the initrd created by genkernel caught it and allowed me to type in the correct root partition. I have ...
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2answers
17 views

Debian : Encrypted Raid 1 setup.

We have a Debian X64 server which has the following config. One single 512GB SSD, which has our OS and two 2.0TB HDD's which have data like attachments, etc. The two 2.0 TB drives are in RAID-1 ...
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27 views

Debian RAID drive size smaller than should be

Background So I am new to setting up a RAID, so bear with me. I have tried to set up a RAID 10 with 4 hard drives. I am using mdadm to achieve this. I have successfully made my raid as /dev/md0. I ...
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19 views

how to install ubuntu server on a new computer? [on hold]

I new to ubuntu linux and planning to set up home server using ubuntu. this home server will be used more like media storage, laptop backup, network print, file sharing and plex. Also I would like to ...
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1answer
23 views

How many drives can I safely lose in a RAID-10 array?

In a 4-drive RAID-10 setup, how many drives can I "safely" lose before the data becomes unrecoverable? It's a bit unclear to me whether the setup provides one drive or two drives worth of redundancy. ...
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33 views

CentOS can't see RAID array partitions

I have the current setup composed by (4x) HDDS sda, sdb, sdc, sdd partitioned in the same way: /dev/sd[abcd] | |- /dev/sd[abcd]1 [EFI FAT 32] |- /dev/sd[abcd]2 [Linux RAID] |- ...
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10 views

Mdadm raid gone after reboot

Mdadm raid gone after reboot. Will gdisk work on 6TB HDD's? Will some describe how to use "parted" to write "fd00"? Rephrased better
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9 views

Linux mint 17.3

Mdadm raid gone after reboot. Will gdisk work on 6TB HDD's? Will some describe how to use "parted" to write "fd00"? This title does not meet our quality standards. Please make sure that it ...
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45 views

Are there any byte-level RAID standards, and if not why?

If you want data durability, you make backups. You might also want to use RAID to improve uptime, and to prevent online data loss. One can use software RAID, onboard/motherboard RAID, or a separate ...
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16 views

Setting SATA to RAID causes PC to not POST

I seem to have broken my PC by trying to create a RAID array. I created the array just fine but forgot to load the RAID driver on my system drive which is not part of the array, I set SATA back to ...
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7 views

Windows 10/7 Dell Optiplex

I have a Dell XPS computer that I originally configured with RAID 1. It drove me crazy (the drives kept losing synchronicity and spending hours rebuilding) that I decided to clear it and install ...
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42 views

Debian : RAID drive showing 62% disk already used even though lot remaining

Sometime back I had configured RAID0 on our Debian X64 server and so far, it is working fine, no issues. One day, I just checked df -h, and it shows me that 62% of disk-space is already used. The ...
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47 views

RAID0 removed and recreated. Can I get my already installed windows back?

I got my MSI GT72S today. It has 256GB SSD from Toshiba with 1TB standard harddrive. The 256GB SSD is physically 2 hard drives each of size 128GB. Both the drives were joined through RAID0. The OS ...
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13 views

MSI GT72S 6QF Dominator System Recovery [duplicate]

I got my MSI GT72S today. It has 256GB SSD from Toshiba with 1TB standard harddrive. The 256GB SSD is physically 2 hard drives each of size 128GB. Both the drives were joined through RAID0. The ...
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32 views

How to Safely Remove Drive from Raid 1

I have a Raid 1 mirror where one of the disk is showing S.M.A.R.T. events so I want to remove it while leaving the data on the other disk intact. My machine windows 10 64 bit uses Intel Rapid Storage ...
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18 views

External HDD is causing my second drive to unallocate (disappear)

I am running Windows 7 x64 and have two drives, C and D respectively. D is within a RAID array running under Intel Rapid Storage Technology (IRST). The external HDD in question is a CN Memory ...
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1answer
30 views

Building a 4TB raid-1 with WIndows 10

I have two 4TB brand new SHDD built as a Raid-1 array on an (old) nVidia Raid controller. After having upgraded the Bios, the 4TB drives are recognized as such by the Raid Bios, and I can create a ...
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1answer
19 views

Rebuilding a raid 1+0 (10) system

We have a set of 8 disks that are raided together with RAID 10. Our software that rebuilds RAIDS do not allow a RAID 10 but does have a RAID 1 or a RAID 0. In theory, we wanted to drop the mirrored ...
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37 views

Which filesystem to use for hosting virtual machines?

Goal A reliable server configuration which serves as the off-site backup for several, distributed servers as well as hosting a few virtual machines. Each server's backups should be encrypted, ...
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1answer
132 views

Fixing a broken Raid-Array (Hetzner-Root-Server from Germany)

I do not know why but my Hetzner Root Server loses once a quarter its RAID array and the situation is different every time. This time I need further help. Maybe they want that I change to ...
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8 views

RAID 5 controller port multiplier

I have 6x320GB HDD and I was considering to create a RAID 5 system (it's for storage only). I use ubuntu 14.04 and I want to ask what RAID controller card allows for 4 (or more) ports without ...
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14 views

Utilization of disks for virtualization

Which disk components/configuration would work best for my scenario? I have a 1U server that supports 4 drives. It has 2 ports for SATAII and 2 ports for SATAIII. It's an 8 core Atom with 2.4GHz and ...
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0answers
12 views

What could be reasons for unexplicably loosing file permissions?

I have been experiencing at one point massive and now very rare loss of file and directory permissions, i.e. revoking of execution right for both system scripts, like /etc/mysql/debian-start, and ...
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13 views

How to upgrade/change BIOS on VIA VT6421 add-in card (if possible)?

(In fact no duplicate, but meant as a complement of this question: Drivers for VT6421A Controller Card ) While Q935612 was for card drivers, mine is not. My question is OS independent, as I want to ...
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1answer
42 views

UEFI and RAID on disks above 2.2TB [AsRock Z97 Extreme6]

I have followed steps from the AsRock Z97 Extreme6 manual how to create RAID on disks above 2.2TB (manual says to use UEFI configuration instead Intel legacy RAID BIOS). In few words what I have ...
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2answers
80 views

How to make hard disk space virtually unlimited? [closed]

We work with video editing. We produce about 30TB of raw footage every year and we are getting crazy. In fact, we keep buying hard drives and putting new projects into different hard drives every ...
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1answer
41 views

Would adding 2 extra ssd's to raid 0 make a difference in speed?

I have 2 850 evos in raid 0 currently. I'm getting 2 more from a co worker and I'm wondering if I add them into my current raid would I get any notable increase in speed or is 2 drives pretty much ...
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55 views

MDADM reshape really slow

To sum up : My raid reshape with mdadm is really slow. The complete story : 3 days ago I realized that one of my disks from a raid 5 array was faulty. I removed it and replaced it with a brand new ...
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26 views

Import zpool with one unknown missing vdev_children.

My raid-z zpool was in degraded mode, I have added a new disk in the zpool with the command: zpool add -f uhuru-test da3 The problem is that da3 have been accidentaly erased and now uhuru-test ...
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1answer
27 views

Hardware or Software failure? [RAID5]

I have a raid5 system containing of 4 Samsung SpinPoint F4 Hard disks configured for auto spin-down after 20 Minutes. It is a Linux Software raid. Today I noticed that upon access to the network ...
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27 views

Win 7 won't recognize 850 Evo single disk with HDDs in RAID1

This has managed to drive me nuts: I used to have 1 SATA HDD as a single drive for OS's and 2 SATA HDDs set-up as RAID1 using the onboard AMD controller for storage, everything was fine. I bought this ...
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38 views

“Disk read error occurred” booting from hard drive or USB on Windows Server 2008

Here's the setup: an Athlon X2, 4 GB of RAM, and a 2x2 RAID 10 array of 4 500GB drives, which also houses the OS. After a usual reboot the machine didn't respond to ping. I connected it to a display ...
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1answer
102 views

Healthy unknown partition created in WS2012 R2 storage pools - How to recover?

I'm seting up a file server from a WS 2012 R2 VM hosted in hyper-v. I have a raid 1 array for the file server storage that is implemented by an Adaptec 5805 raid card. This disk was set to offline in ...
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1answer
22 views

How can I archive files to blueray with redundancy?

Reading recently about facebook's usage/desire to use blu-ray disks for long term cold-storage, I wonder if this might be an additional mechanism to backup my photos and videos. The part that worries ...
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1answer
60 views

How to use fakeraid/dmraid with gpt?

So I recently set up Intel RST RAID on my Gigabyte z77‑d3h with UEFI firmware. The UEFI system recognizes the new RAID array instead of two disk and load bootx64.efi from the array. The RAID array is ...
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0answers
33 views

ibm x3850 m2 megaraid not showing physical drives

I have this ibm x3850 m2 with 2 physical drives installed but when I go to megaraid it doesn't show any of the physical drives So I can't build a virtual drive to install the OS What I have tried ...
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19 views

On ubuntu add a HD to RAID5 but the size do not Extension

In this time I have a RAID5 using three HDs(2TB*3) and I was tinking to Add a new HD and Extension the size to 6TB, The existing HDs is [adb][adc][add]=[md0] Then add HD is [sde] Wat I did is,,, # ...
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43 views

Is running a linux VM on a windows machine for btrfs software raid a good idea?

A bit of backstory: I used to have a raid 5 array on my main (win 7) computer using a highpoint raid controller. I used to think if any part died I could replace it, so I was safe as long as I did not ...
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2answers
24 views

What are the different widely used RAID levels and when should I consider them?

This is a copy from this question on Server Fault in order to have a very good question to which to can VTC other duplicates. This is a Canonical Question about RAID levels. What are: the ...
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2answers
16 views

Is there a RAID mode that allows files to be on one physical drive of the array?

I am wondering if there is such a thing as a RAID mode (or similar implementation) that allows to physically split up files without redundancy across multiple, differently sized hard drives to form ...
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30 views

Strange software RAID performance results (on linux)

I have four 2TB 7200rpm hard drives that I want to configure as a software RAID array, using mdadm on linux (Ubuntu 15.10). I took this opportunity to explore the read/write performance of various ...
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28 views

Is it possible to create RAID1 and JBOD with 2 hard drives?

I have a 2-Bay Synology NAS enclosure and ideally I want to achieve the following setup, unfortunately the GUI doesn't allows me. So my question is Is it possible to create the following setup? And if ...
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0answers
23 views

Is there a way to boot from a GUID Partition Table on a Intel FakeRaid (IMSM) RAID1 configuration?

I have a Intel H170 based Asus H170 PLUS Motherboard that supports Intel FakeRAID. Attached are two identical Seagate 1TB harddisks on which I want to install ArchLinux 2015-12-01. The UEFI BIOS on ...
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7 views

How to create the raid-1 configuration on the server

I have a centos 6.5 server(virtual) with one hard disk drive and my customer is asking another drive to it to create a bootable raid 1 configuration.(It had LVM). How to create the raid-1 ...
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6 views

Growing an mdadm RAID array with differently sized disks

I have a raid6 archive array made up of 4 2TB drives (+OS on an independent SSD). I'm starting to run out of space and my target final goal is 4 4TB drives. I don't have enough SATA ports to run both ...
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35 views

RAID vs AHCI for backup

My SSD with Windows 7 recently crashed, so I'm going to purchase a new SSD and install Windows 7 to replace it. I'll also have to reinstall all the drivers for my hardware (motherboard, graphics card, ...
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34 views

MDADM rebuild raid 6 with 3 'failed' drives

I've ran into the following problem: My Raid 6 (/dev/md6) failed after 3 disks fell out of the array. One of the disks must have been out for a while (in SMART, 5 of the 6 disks have an uptime of ...
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64 views

Rebuilding degraded simple mirror volume (“The plex is missing”)

I'm interested in rebuilding a basic degraded dynamic volume without resorting to trivially breaking/deleting and re-creating the volume. There is no concern about data loss. I hope to use this as a ...
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14 views

How to suspend / sleep / spin down disks in RAID - Created by the Debian installer?

I have created a RAID 1, with two disks using the debian installer. The RAID is used in my server. Due to the fact that it's a private server and I don't care about performance but more about ...
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158 views

How to install Ubuntu 15.10 on an encrypted RAID 1

I recently set up an Ubuntu 15.10 (desktop) on a encrypted RAID 1 and want to share how to achieve this as it didn't work out of the box and I didn't find any tutorial. So what I wanted to achieve was ...