Questions which refer to software RAID implementations.

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2answers
383 views

Redundant storage of select files and synchronization between multiple computers

Historically, I've manually copied personal files onto multiple hard drives periodically to keep them backed up, but I just emptied my wallet getting certain files that were only stored in one place ...
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3answers
989 views

Software RAID0 with drives of drastically different sizes

Is it at all possible to do a software RAID0 (with Ubuntu Server, installing Crunchbang on it though) with drives of drastically different sizes? One of the drives is 250GB while the other is 60GB.
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1answer
16 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 ...
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2answers
366 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 ...
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1answer
98 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 ...
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1answer
70 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 ...
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1answer
264 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 ...
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1answer
394 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 ...
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1answer
157 views

Linux software RAID 10 on mixed drives - alignment

I have 4 2.5" 7.2k drives lying about and I'd like to build some RAID arrays for a bit of VM storage on my KVM lab box. There are 2x 320GB drives and 2x 500GB drives. I'm looking to create a RAID 10 ...
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2answers
76 views

Writing to a specific drive with software RAID4 on Linux

Edited to reflect conclusions from comments: I want to construct a software RAID-like array with 2 storage devices plus one parity device, where the parity device maintains the XOR of the two other ...
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2answers
717 views

How can I recover software RAID 0 after formatting my primary OS drive?

I was previously running Windows 7 on a machine that had 5 physical drives - 1 was the primary drive the OS was installed on, and the other 4 were a RAID 0 that was created through Windows 7 disk ...
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1answer
193 views

Why can't I enable software RAID on a pair of SD cards in Windows XP Embedded?

I was hoping to set up software raid between a pair of SD cards (for redundancy) in an embedded device but as I understand it, I need to upgrade them to dynamic drives to do this. The cards appear ...
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1answer
471 views

Apple RAID configuration vs Hardware RAID

I am researching external HDD's capable or RAID 1 to store a large amount of video content during overseas filming. After filming, the content will be brought back to the office and offloaded onto our ...
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1answer
172 views

Re-assembling a linux RAID on different system

I am in the process of shopping for drives for my Linux Server (CentOS 6.3). I think I have it narrowed down to RAID 5 or RAID 10 (have to see what hard drive prices do) and using the Linux Software ...
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1answer
288 views

What would happen in a Software Raid 1 of one HDD and one SSD?

I'm running my Windows 7 installation and all of my apps from an SSD for performance reasons. Since SSD's can instantly die at any moment, I'm looking for some kind of data backup strategy. Right Now ...
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1answer
158 views

Replace mainboard without damage software RAID

I am currently using software RAID on Ubuntu 10.04. Since my mainboard only supports DDR2, I want to replace it with another one. However, I'm worry about the software RAID damaged. Will the Ubuntu ...
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1answer
101 views

Partitioning 2 SSDs of different capacity for RAID 1

I have two SSDs. One has 64G the other is 32G of size. I'd like to create a RAID 1 configuration with Linux (it would be a software RAID), and I'm wondering if what I'm planning is possible or wise: ...
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2answers
4k views

Is it possible to enable software RAID 1 on Windows XP system partition?

I have heard, that it should be somehow possible to use just one partition with Windows XP, and be able to mirror that by enabling RAID 1 in XP. I'd appreciate tips how to do this. If this is true, ...
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5answers
2k views

Windows Software RAID 5 Drive Failure Notification

I plan on creating a Windows software RAID 5 array but need to know when a drive goes bum. I don't plan on wanting to check the server every so often, so how can I have an email sent when a drive ...
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2answers
18 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 ...
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0answers
12 views

Windows Server 2012 Software RAID 1 with dynamic disks; mirror two drives to one larger [migrated]

Lets say I have 3 SSDs: 1.) 120 GB, 1 Partition 2.) 128 GB, 1 Partition 3.) 250 GB, Mirror Is it possible to mirror both the partition from SSD 1 and SSD 2 to the large third SSD? Such that the ...
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0answers
14 views

Unable to access newly created software RAID array in Ubuntu Desktop

please assist me with the following problem. I already have an Ubuntu Desktop 12.04 box into which I have added 2 500GB drives in the hopes of wring them up in a RAID-1 configuration for simple ...
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0answers
48 views

Windows Software RAID 1 - How can I “Offline” both disks at the same time?

I want to disable both drives in my Mirrored Volume setup so that I can mount them in a virtual machine (for testing, no important data is on the drives right now). Offlining them individually breaks ...
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0answers
10 views

software raid1 compatible on OSX and Ubuntu on external disks

I'm using external disk dock with two disks and want to setup software raid1 so that the setup works when usb3 mounted from both ubuntu and osx. How is this possible?
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0answers
26 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 ...
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0answers
66 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" ...
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0answers
20 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?
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0answers
13 views

Is it possible to restore RAID data when a RAID restoring process was crashed?

I have a 4 HD RAID. One of then was crashed and during the restoration process another second one HD has crashed too. This is very improbably but it happened. So, is there any software to recovery my ...
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1answer
39 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 ...
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1answer
28 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 ...
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0answers
29 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 ...
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0answers
29 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 ...
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0answers
17 views

data recovery issue with LVM on degraded software raid array

I have a raid-10 array that is degraded to two remaining working drives. The software setup is Centos-Xen, so one dom0 and several domUs. I can see the names of the logical volumes and their names and ...
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0answers
22 views

Win 8.1 Pro: Disk Mirroring questions

So its my first time setting up any kind of redundancy for my media and I have a few questions. My setup is as follows: Shuttle SH87R6 Intel i7-4790k 8GB RAM Win 8.1 OS on Samsung 850 Pro 512GB 2x ...
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2answers
86 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 ...
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0answers
36 views

How do I tell which OSX Raid partition needs fixing (and fix it)?

Investigating why my OSX Software RAID disks weren't all being used I discover my RAID-1 system (4 x 1.5TB in two mirrored 3TB slices) is running in degraded mode: airhead:kitematic sholden$ sudo ...
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1answer
30 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 ...
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0answers
31 views

Cannot get RAID working with Mac Mini after adding drive

I had a working RAID array with 3 2TB drive in an external Startech.com SATA enclosure that was set to RAID5 I wanted to add another 2TB drive, so I added the drive but according to the manual, I ...
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1answer
93 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 ...
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0answers
87 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 ...
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0answers
43 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 ...
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0answers
29 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 ...
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1answer
78 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 ...
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0answers
37 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 ...
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0answers
36 views

Updated CentOS kernel to 2.6.32, system won't boot because mdadm array can't be checked/isn't mounted

Just updated a FreePBX system, kernel is now at 2.6.32. Have two RAID 0 arrays that mdadm arranges in RAID 1. Worked fine up until this update, now I get fsck.ext4: No such file or directory while ...
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1answer
55 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? ...
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0answers
21 views

Linux: How to confirm bad ATA device? [duplicate]

dmesg listing this error string 14 times consecutively: [ 799.496637] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 [ 799.496683] ata4.00: BMDMA stat 0x4 [ 799.496710] ata4.00: failed ...
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0answers
17 views

With a the built-in Windows software-RAID1 mirror, what procedure does Windows follow on an unreadable sector?

For modern retail hard drives, the Unrecoverable Read Error (URE) is around 1x10E14 bits. This translates into one bad sector for every 12 terabytes of data read. For enterprise class hard drives, its ...
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0answers
77 views

Raid Configuration lost After For Installing Windows/Formatting Hard Drive on reboot

My boss recently got a tower fujitsu server, I dont know the model because it is written in Chinese. I installed windows server 2012, activated hyper-v and even installed ubuntu as a VM and ...
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0answers
87 views

BTRFS multiple devices mix raid1 and raid0

Hi Consider the following use case: I have two disks same size (let's say 3TB each). Then create a btrfs filesystem using both devices. Now I want to have two subvolumes "idata" and "ndata". Where ...