Questions which refer to software RAID implementations.

learn more… | top users | synonyms

1
vote
1answer
85 views

Assemble 3 drive software RAID5 with one disk missing

Is it possible to assemple a three drive software RAID5 with only two disks? I have one failed disk in my setup which i could not read at all but the two other disks are fine. So i created a dump of ...
2
votes
1answer
132 views

BTRFS, Files on a single drive in array but keep 2-parity?

Is it possible to setup a BTRFS array of disk but tell it to keep files on individual disks instead of stripping them and still keep a 2-parity? The idea is that if three drives die, the files on the ...
0
votes
0answers
59 views

Windows 2008 RAID5 - How Many Disks Have I Lost?

I have an HP ProLiant Microserver running Windows 2008 R2 Standard, it has a 512mb system drive and 4 3Tb Seagate Barracuda drives running in software RAID-5 which give around 8.2Tb of storage. I ...
0
votes
1answer
235 views

Reconnect drive to raid-1 array with mdadm

I need a large and relatively robust backup method. I had an old desktop running debian and put in two identical 2tb drives in raid-1 configuration using mdadm So I would start the array using ...
0
votes
0answers
51 views

How to turn a current drive into a RAID array?

Everything I've been able to find by googling on creating RAID arrays assumes you are starting from scratch with blank disks. However, I have a drive that is almost filled, and would like to turn it ...
1
vote
2answers
3k views

Use software RAID 1 drive as main disk and boot drive in windows 7?

Can I boot from a software RAID 1 (mirroring) drive in windows 7? Windows 7 would not let me install to a software RAID volume so I installed to the first disk and then added the second disk ...
0
votes
1answer
154 views

Win 7 64-bit slow during software raid 1 resyncing

I read about the slow resyncing here: http://serverfault.com/questions/107636/how-to-view-status-of-software-raid-1-resynching I have a different question: not only is my resyncing slow; but during ...
2
votes
0answers
246 views

Parity errors after verify with Intel RST

I have Intel RST RAID 1 running on a Windows 7 machine. I have it set to do a verify and repair every week. I frequently notice parity errors, some weeks over 100 for a 1 TB RAID 1 array. I've ...
1
vote
0answers
369 views

chunk, ext4 stride and strip-width size for RAID level 1?

the man page for mdadm says: "[chunk] is only meaningful for RAID0, RAID4, RAID5, RAID6, and RAID10." i.e. it does not apply for raid1. even if you pass the value, it will say "ignoring chunk size" ...
0
votes
0answers
23 views

Is it possible to enable RAID 1 without reinstalling Ubuntu

I would like to enable RAID 1 on my alrwady existing Ubuntu installation. Is this possible without reinstalling Ubuntu?
1
vote
1answer
449 views

Import foreign disks in RAID-0 config

I've to import 2 disks in RAID-0 into another computer. Both source and target PC run Win8. In the target PC I see two foreign dynamic disks and when I right-click on any of those and then I select "...
1
vote
0answers
165 views

Alignment with RAID-6 (mdadm) + LUKS + XFS

What I want: I have a 4x4TB RAID-6 array with mdadm. I want the storage to be encrypted and plan on using LUKS. I will most probably use XFS as filesystem. I will add more disks to the array as ...
0
votes
1answer
74 views

mdadm build legacy array on boot

I have RAID0 that was built using windows dynamic disk. I've read that this is a legacy array and can be assembled using build in mdadm. I've gotten the array to build and mount using the following ...
1
vote
1answer
95 views

Create Degraded RAID 1 in Windows 7

Question is simple. Can one create a degraded RAID 1 in Windows 7? In other words specific to a hypothetical situation, can I have a backup drive with backup data on it, then buy a second backup ...
0
votes
1answer
53 views

Keep linux software RAID 1 after OS change

Currently I've configured software RAID 1 on ubuntu machine. However I am planning to add SSD drive just for the OS and keep my main 2 HDD for the storage with RAID. The question is, can I put now ...
1
vote
0answers
71 views

Raid0 recovery - failed mobo

Short story: motherboard died, need to recover data from 2 working HDD's in RAID0 Long story: My mobo died on a Dell Studio XPS 7100, I basically upgraded all the components and my pc is now up and ...
0
votes
0answers
55 views

cloning drives to correct RAID 10 failure

I don't type questions like this very often, so I apologize if I could have made it clearer. I have 4 HDD slots in which I had a RAID 10 array setup. It is a motherboard software RAID so clonezilla ...
1
vote
1answer
61 views

Is a btrfs RAID1 mountable if the added device isn't available/offline/failed/degraded?

Assume I created a RAID1 with btrfs's functions (btrfs device and btrfs balance subcommands instead of mdadm) like so: btrfs device add /dev/sdxZ /dev/sdxY btrfs balance start -dconvert=raid1 -...
1
vote
2answers
396 views

Cloning a Linux software RAID and LVM setup to another computer

I need to create a number of (almost) identical Linux machines (Debian Wheezy) with software RAID and LVM. I'm thinking of creating a base installation and cloning that one to all machines. I tried ...
-1
votes
1answer
40 views

What will happen if I reconnect 2 halves of two-way RAID mirror after using them independently?

Suppose I have a storage space with two-way mirror based on 2 physical USB drives a and b. Then I disconnect b and connect it to another computer. Then I use—write some data—to both degraded storage ...
0
votes
1answer
39 views

How many disks for Windows Raid 0?

I am setting up a new PC and have 3 identical disks. Does it make sense to stripe all three or is two sufficient? I don't really need extra space, so wondering if 3 will yield better performance ...
1
vote
0answers
60 views

RAID5 active device failed during reconstruction

I have this Linux RAID5 array with 4 2TB harddisks, with 3 active device and one spare, giving me a total disk size of around 6TB. Recently one drive (sdd) is starting to give me some SMART errors, ...
0
votes
1answer
160 views

Recover data if PC (motherboard) fails with software RAID 5

I'm planning to implement a RAID 5 (or 6) system on an old PC (windows or linux). It doesn't have HW RAID 5 support so I'll do it via software (e.g. windows integrated RAID). Will I be able to ...
2
votes
1answer
265 views

Hard disk error in Intel Matrix Storage Manager

I have two hard disks, both 160GB, and with Intel Matrix Raid on these two disks, I created two volumes Volumne0 Raid1 Volumne1 Raid0 Now, one of the hard disk shows error in the Intel Matrix Raid ...
1
vote
1answer
84 views

MDADM RAID5 recovery, refused to add replacement disk

I dealing with a faulty raid5 setup (3x2TB disks): Number Start End Size File system Name Flags 1 1049kB 1026MB 1024MB ext3 primary 2 1026MB 6146MB ...
0
votes
1answer
283 views

How would hardware RAID compare to Windows software RAID?

I recently bought a new PC with a Gigabyte Z97P-D3 motherboard. One of the things it supports that my old machine didn't is RAID so I had planned to transfer my 2x 1TB hard drives from my old machine ...
1
vote
1answer
411 views

WD Green and Software RAID

On WD's website it says Desktop drives are not recommended for use in RAID environments, please consider using WD Red hard drives for desktop RAID environments or WD datacenter hard drives ...
0
votes
0answers
150 views

mdadm grow from RAID1 to RAID10

I've seen this post about how to convert from RAID1 to RAID10, but reading the mdadm manpage seems to me recent mdadm allows for reshape from RAID1 to RAID10 by going through a reshape from RAID1 to ...
0
votes
0answers
57 views

RAID setup - possible to disconnect a drive?

this may be a silly question for some, but I rather ask then to be sorry after losing my data :-] I am just playing with RAID config on my Intel X58 ICH10R chipset mobo with Windows 8.1 and I found ...
0
votes
2answers
969 views

Simultaneous failure of 8x SSD's in raid 10 [closed]

My friend keeps arguing with me about putting SSD’s in raid vs HDD, I need to settle this. What are the odds of all the SSD’s failing vs HDD”s at once assuming they are from the same assembly line and ...
0
votes
0answers
38 views

raid5 after changing disk, data disappeared in lost+found or?

I lost a drive so I stopped my array, changed the drive, reassembled the array. So far so good except that when I tried to mount the array I had an error about md0 file system (sorry I rebooted so ...
1
vote
1answer
187 views

mdadm --examine displays something different than --detail

Who should I trust to fill my /etc/mdadm/mdadm.conf ? mdadm --examine --scan returns /dev/md/0 while obviously it's /dev/md0 that is currently rebuilding What should I put in my /etc/mdadm/mdadm.conf ...
0
votes
0answers
98 views

Windows not loading after 1 RAID-5 disk failed

I left my PC turned off for just over a week while I was away. When I turned it back on it said my RAID-5 status was degraded and Windows did not want to load. I replaced the faulty disk and set it ...
1
vote
0answers
65 views

Growing an encrypted RAID5 array without causing alignment issues

Question Is there anyway to tell mdadm to make sure a certain logical sector on the RAID-device stays aligned to the beginning of a stripe when growing a RAID5 array? Problem My RAID5 is encrypted ...
0
votes
1answer
160 views

mdadm: Reactivating RAID6 array after improper shutdown

I have a seven-disk RAID6 array on a file server. The server experienced a crash and a hard reset was required, resulting in an improper shutdown. Note that I/O activity was likely occurring on the ...
2
votes
2answers
764 views

Removing a disk from an Ubuntu mdadm RAID marks the array as inactive, instead of degraded

I'm setting up a mdadm raid 1 array on Ubuntu 14.10 under VirtualBox. Everything works fine: The raid 1 is set up with /dev/sdc1 and /dev/sdd1: Personalities : [linear] [multipath] [raid0] [raid1] [...
1
vote
2answers
631 views

MDADM says can't assemble RAID5 because missing disks but all disks are there

To start this, I installed a SATA expansion card so I could get more Drives into the computer. I moved the RAID to the expansion card, after attempts failed to get the OS SSD onto them. There was a ...
0
votes
1answer
89 views

Would software RAID 1 be broken if I move both drives to a new PC? [duplicate]

Does a RAID 1 setup by software (win) break once you move both drives to another Win PC? Is there any way to bind the drives together so that the RAID setup stays, even after changing motherboard/cpu?
0
votes
1answer
293 views

Raid0 Test For Multiple Partitions On A Single Drive Gave Better Sequential Write Speeds That Expected

Obviously running raid0 on partitions of a single drive will result in a performance decrease; data has to be written/read multiple times to/from the same drive, and because of how it's spread the ...
2
votes
1answer
2k views

Boot partition for Software RAID 1

According to this tutorial: http://edoceo.com/howto/mdadm-raid1 as well as the answer to this question, ...it is necessary to create a separate boot partition if you want to boot from a software ...
0
votes
1answer
28 views

Does RAID1 really protect me?

I have 2 drives mirroring each other. They are pluggable and occupying 2 SATA slots. Totally I have 5 SATA slots. Can I freely unplug RAID parts and then plug them back and have data intact? If not ...
0
votes
1answer
583 views

Cloning md partitions for recovery

I have a failed software RAID5 (3x500GB disks) that I'm trying to recover. I don't want to try some of the more risky steps on the actual disks, so I want to clone them to new partitions on a new 3TB ...
1
vote
1answer
4k views

Laptop offers RAID option - how does that work?

I am in the market for a new laptop. I'm looking at the Dell M6800 and HP ZBook 17. Both of these laptops can be configured with a RAID 0/1/5 option. Is this hardware RAID or software RAID? I have ...
1
vote
1answer
421 views

move mdadm raid to new system

Have a 4-drive Ubuntu mdadm raid in a system whose motherboard (ASUS N1996) failed permanently. I tried putting the 4 drives in another system with a different motherboard, but when it came up it ...
0
votes
1answer
61 views

Add space from 3TB unto 4TB using raid, how?

I would like to expand my 4 TB drive by adding on drive space from my 3 TB drive. I assume this is possible in a raid configuration by resizing the partion on the 3 TB to free space then using ...
2
votes
1answer
1k views

MDADM RAID-0 does not increased size after grow on AWS Linux with EBS

I wanted to grew a Raid0 from 2 disks to 3 (each 1TB EBS on Amazon AWS) but the size did not change thereafter. The RAID started with two disks sdc and sdd and the new one was sdf. Here is the grow-...
10
votes
1answer
528 views

Where is the software RAID information actually written?

Like title says, where is the actual information which specifies which disks are being used, what order, etc...? I noticed while installing a linux distro that it was detecting a RAID array without a ...
0
votes
2answers
3k views

New mdadm RAID vanish after reboot

I have problems with mdadm after reboot, I can't reassemble /dev/md0 . I work on debian wheezy. I have done the following steps:: sudo mdadm --create --verbose /dev/md0 --level=6 --raid-devices=4 /...
0
votes
1answer
55 views

What is the best way to create RAID 1?

I'm looking for a way to create the RAID 1 array without losing my data on CentOS. Here's my situation: I've got a web server running on CentOS. There is one VG partition with few LV volumes. I bought ...
0
votes
1answer
1k views

Software RAID 0 under Window 7 on 2 HDD only (including system drive) - is it possible

I have two hard drives in my notebook. I cannot add third drive. Is there a possibility to somehow set up software RAID 0 (striped) under Windows 7? My notebook does not support hardware RAID 0. I ...