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Questions tagged [software-raid]

Questions which refer to software RAID implementations.

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Re-use raid 5 in debian that was created in an external raid cabinet

I had 5 disks in a Deltaco raid cabinet configured to run the disk in RAID5. Now the cabinet doesn't work anymore, and I'm trying to get the data from the disks. I hoped that I could just pop the ...
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1answer
135 views

Raid with 4 disk of different size

I have 4 disks, 2 of 500GB, 1 of 1TB e 1 of 2TB capacity. I would like to create a striped array from first 3 disks (500GB + 500GB + 1TB), then mirror the content on 2TB disk. It's possible? I would ...
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2answers
474 views

Can I use s SAS-expander without a dedicated hardware RAID Card?

I'm trying to expand my ZFS raid setup and I have used up all the available Sata-ports on my motherboard. I have read about SAS Expanders online and I think i have understood what they do. But one ...
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230 views

One RAID1 missing after reboot

I'm using Open Media Vault 3 that is based on Debian 8. I already have a RAID1 of 2x4TB WD Caviar Red, and now I'm tring to build a RAID1 with two Seagate Ironwolf 6TB. Whe I build it anything is ...
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437 views

How to prevent an mdadm array check from consuming excessive system resources?

Once a month I've been doing echo check > /sys/block/md2/md/sync_action in order to force a software raid consistency check. The problem is this is a 7.2T RAID 5. The consistency check takes ...
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55 views

ESXI Hardware RAID Solution

I'm re-purposing a machine to run ESXI and made a rookie error in that I did not properly understand the hardware requirements. The machine will run a range of linux distros which will then runner ...
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1answer
714 views

How to identify bad disk by WWN Windows Server 2008

I have two identical hard drives in Windows Server 2008 configured in diskmgmt.msc as a software mirror, or whatever MS's parlance is. One of the disks is bad. Good ol' Linux can show a drive's WWN in ...
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1answer
65 views

Setting up Lubuntu partitions with RAID 5

This might be a silly question, but I'm about to set up a home backup/media server with 4x3TB drives, running Lubuntu on a Dell PowerEdge T20. It will have periodic large writes at off hours, and ...
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2answers
53 views

HW to Software RAID Migration

I have an Adaptec 81605ZQ RAID Controller currently connected to: 2 x 8 TB HGST HDD in RAID-1 2 x 1 TB Samsung 850 Pro SSD in RAID-0 (separate array) 1 x 128 GB Samsung 850 Pro SSD as "MaxCache" (...
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0answers
59 views

Migrate a Debian 7 server with mdadm to Hyper-V

I have a physical server running Debian 7 with mdadm configred to have 2 300GB disks in RAID-1. I need to import that server into a VM to be run with Hyper-V. If it hadn't RAID I think it would be ...
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1answer
845 views

In raid, but does not appear to be an md device?

Am running Ubuntu 16.04 and setup a raid with 2 4tb hdd's. When I run this: sudo cat /proc/mdstat Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10] md0 : active ...
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1answer
53 views

Lost boot drive on raid 1 addition

I have 3 physical disk in my box, 1 ssd I was booting Ubuntu 16.04 from, then 2 4tb drives. I made a raid 1 array from the 2 4tb drives, but now cannot boot from SSD. What do I need or should I do? ...
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1answer
34 views

Is there a way to determine what RAID-type I am using?

I've recently set up RAID 0 with two disks. I've done that via my Asus Prime X370 Pro's UEFI. Today I stumbled upon the terms "Software RAID", "Hardware RAID" and "Fake RAID". Most of the sources ...
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1answer
63 views

Unusual hybrid nested raid array configuration (raid 1 AND 5)?

I was wondering about your thoughts on an off-the-wall raid configuration with 4 disks. Ignoring performance hits (which I expect to be bad), could one configure a raid 1 array with one leg begin a ...
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231 views

Options for parity setup with 3x 8TB drives + 128GB SSD?

My current setup is 1x 4TB, 1x 5TB, 1x 6TB for assorted files, media, and a bunch of installed games (that won't fit on my main 480GB SSD). None of it is backed up, except a 1.5TB chunk of ...
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2answers
1k views

RAID1 mdadm: not large enough to join array

I have been using my HDD as part of software RAID 1 array with the second device missing. I configured it this way to be able to add another disk when I have a chance. Now I've bought the second disk ...
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2answers
338 views

Most cost effective and fastest RAID array?

I had a SSD, and it failed and I lost all my data. Sad day.. What I want: To make a RAID 1 array to have all my data mirrored onto 2 drives and backed up. I want to use and have SSD speeds(important),...
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0answers
296 views

Is it possible to recover / convert / mount fakeraid image files? (TL;DR - have fakeraid images, want to convert them to mdadm images)

My Promise NAS NS4300N recently died (PSU or motherboard failure, probably the former as it has trouble spinning up the disks). I've managed to dd(1) the drives (4 500GB drives in a RAID5 ...
2
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1answer
2k views

New RAID-5 volume is grayed out

I try to create a RAID5 volume with 5 disks, all 5 are exactly the same (5x Seagate thin 250GB) Disk Management can see every disk, also I can choose every RAID except the RAID5. Because, I love ...
3
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1answer
47 views

Am I OK to replace motherboard and add new RAID card with this RAID setup?

This post here: New motherboard or new PC to gain access to RAID drives Suggests that if I am using a software raid, I can swap out the motherboard with no issue as long as I am using the same OS. ...
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0answers
290 views

Raid Spare Spin Down

I have a software RAID 5 array (mdadm under Debian Linux) that has been up for the better part of a decade and has seen it's fair share of drive failures. I've always been leery about setting up a "...
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1answer
118 views

Unable to reassemble RAID10

I'm not sure if this is the community to ask but I thought I would give it a shot: Our server that runs a 14 drive RAID10 through a rocketraid 2470 controller refused to assemble. Our goal is not ...
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1answer
94 views

AMD SP5100 Raid 0 rebuild

I was using an onboard AMD SP5100 raid controller for a Raid 0 on two 1TB drives. The motherboard has failed. I have two questions - firstly if I replace with an identical motherboard, will I be able ...
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1answer
587 views

Can I create a degraded mdadm raid10-near (raid 1e) array?

I have three drives in my current system (all 1TB). The current setup is: sdb - raid0 member (failing soon) sdd - raid0 member sde - backup I'd like to change it so all three drives are part of a ...
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0answers
257 views

Eight-disk RAID-Z2 array has less capacity available than expected

I have a problem to explain the missing capacity in my raidz2 # zpool status -v nas pool: nas state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM ...
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2answers
167 views

Linux RAID Mirror only half size

I just bought a couple 4TB WD Reds and for some reason when I try to mirror them the resulting array is only 2198.9 GB large. Both disks are formatted as Linux RAID Autodetect (ID fd) with fdisk, and ...
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0answers
58 views

Can I move existing Windows 7 setup to a RAID-1 array?

I have a the following setup: machine with one 1TB hdd and with W7Ultimate installed on that drive (with RAID in BIOS). Now I want to make it running as RAID 1, so I have two additional similar 1TB ...
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0answers
43 views

Intel RST and W10

I recently upgraded W8.1 to W10 and I am not sure if it is affecting the performance of my Intel RAID 0. I use it for video post work and the data now seems to come in spurts rather than a constant ...
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1answer
251 views

mdadm assembles degraded RAID 5 as RAID 0

I have a four disk RAID 5 set up under kubuntu 16.10. One of the disks failed and I am waiting for a replacement to arrive. However, my computer froze at some point and now mdadm tries to assemble my ...
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1answer
63 views

Software RAID0+1 using 3 disks

Is it possible to use mdadm to do RAID0+1 using 3 disks? My scenario is 1x2TB disk and 2x1TB disks. Not interested in the RAID0 performance boost, just want to combine them so I can mirror them with ...
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1answer
8k views

Best performance: Windows 10 software striping vs. storage spaces simple

Looking to squeeze a bit more speed out of my development PC for test VMs without necessarily switching to hardware RAID. I've got two identical 2TB SATA-3 data drives (OS is on SSD) so I could ...
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1answer
36 views

Need to recover RAID0 disks from failed linux box

I have two drives from a failed old Linux box that were configured as RAID0. I have created two dd image files using the following commands on my Mac: dd if=/dev/disk3 of=disk0.img.dd bs=512 dd if=/...
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1answer
970 views

How to clear RAID “Error Occurred(0)” member disk message?

I had a bad SATA cable which caused an "Error Occurred(0)" message to appear on one of the member disks. I replaced the cable and everything works fine now, but the message remains and the RAID logon ...
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1answer
168 views

btrfs convert raid 5 to 1 with usage filter possible?

does btrfs support converting the filesystem partially? I am currently in this state: btrfs fi df . Data, RAID5: total=9.83TiB, used=7.68TiB System, RAID1: total=32.00MiB, used=704.00KiB Metadata, ...
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2answers
79 views

RAID0 data recovery & recovery strategy validation

I have a Synology expansion (DX213) connected to my NAS. It houses 2 disks of 2TB and they are in a RAID0 configuration (awful idea, I know and I don't need a reminder ;) ). Last weekend, the array ...
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1answer
1k views

Is a Simple Storage Pool the same as software RAID 0 in Windows 10?

I have a single SSD in my PC as a boot drive with two 1TB HDDs that I'd like to setup in RAID 0. I'm not storing anything important in RAID 0, just my Steam library. I figured setting the drives up ...
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0answers
18 views

MDADM Raid6 Array only able to read parts of files

I run a ubuntu nas with raid6, mdstat does not indicate that anything is wrong, but when i try to read files on the raid volume, i am only able to read about 1/4 of the file, and the file transfer ...
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27 views

One of the raid 1 disk is failed how should i proceed [duplicate]

I am using asus P8Z77-V motherboard and i have setup the raid in the begining from computer start up CTRL-I Now i have ordered another identical driver and copied all files in the left raid drive to ...
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1answer
646 views

Storage Spaces - Parity vs Mirrored or Single with Robocopy

So I'm thinking of dropping my Synology RAID 6 NAS and upgrading to Storage Spaces. I have a number of dissimilar sized drives and Storage Spaces would allow me to use those. My NAS is maxed out at ...
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2answers
297 views

Mounting raid5 disks without one of raid's member

I have to read data from disks, which are raid5 members. I'm wondering if there is posibility to read data from those disks somehow, but one of those disks is just broken. I was trying to mount some ...
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0answers
342 views

Clonezilla and software RAID array theory

I don't have enough hardware to try this out myself, but since Clonezilla doesn't support backing up software RAIDs, I've been trying to think of ways to backup my RAID0. Since all of the information ...
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2answers
3k views

Expand a Linux MD RAID 10 array to use larger disks

From what I understand this is possible, but I can't find a straight answer anywhere about how exactly to go about it, and I don't want to risk losing data experimenting with it myself so I'm asking ...
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0answers
144 views

RAID 6 Resync after system crash

I am running a home NAS server for data storage using linux (ubuntu) and RAID 6 configuration (using MDADM), however, occasionally the server crashes/hangs or experience a power-outage/interruption of ...
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1answer
29 views

Linux software Raid5 DegradedArray with mdadm

So I changed my case and I don't know why but one my SATA port does not work anymore. So only 5 of my 6 RAID5 disks were recognized. The volume was automounted anyway and I already wrote new files on ...
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1answer
90 views

Debian pvmove of root lv into raid10 device resulted in unbootable system

I was in the process of moving logical volume extents onto an raid 10 array assembled with mdadmin. One of the logical volumes moved was the root directory (debian testing system) which was previously ...
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1answer
3k views

Windows 10 software RAID mirrored boot volume: How to make second disk bootable when first isn't present?

I'm searching and researching for answers for days now with little success. I've setup a Windows 10 software RAID-1 nurrir with 2 ADATA 240gb SSD disks. I expected that when 1 drive fails, then the ...
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1answer
18 views

Does rsyncing a Linux boot disk require any caveats to run off the copy?

The new server to run CentOS7 is on order. It will have a 60 GB SSD for CentOS 7 and four internal hard drives. The internal hard drives will run in a software RAID1 for three disk mirroring plus the ...
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1answer
67 views

Unable to assemble mdadm array due to lack of errors

My virtual machine host system is running Debian 8.4. I had to restart the system yesterday and did not yet manage to get my mdadm array up and running again. I can boot up normally, but no array (or ...
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638 views

Why does Dell PowerEdge T330 force hardware RAID for 8 drive configuration?

I'm considering the Dell PowerEdge T330 server tower to run CentOS Linux. The chassis configurations that can be ordered are either 4 3.5" hard drive slots or 8. We need to run a software RAID (that's ...
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1answer
479 views

Which RAID is easier to do recovery from, a software RAID or a hardware RAID?

I'm shopping for a new server and have been using software RAIDs. But I wondered about doing recovery on a hardware RAID vs a software one. I know with a software RAID you have to enter a series of ...