Questions which refer to software RAID implementations.

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142 views

Is `dmsetup remove` safe with respect to contained data?

I have a "lost" SW RAID array as described in this question: http://askubuntu.com/questions/311024/raid1-array-lost-after-upgrade-from-ubuntu-11-10-to-13-04. I have now identified a way to mount one ...
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1answer
399 views

Documentation for mdadm bad block support

I've read a bit about that mdadm (and the kernel) now have bad block support but I am having a hard time finding any useful documentation on this subject. Is the bad block list for disk X duplicated ...
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0answers
251 views

Upon reboot, Linux software raid fails to include one device of a RAID1 array

One of my four Linux software raid arrays drops one of its two devices when I reboot my system. The other three arrays work fine. I am running RAID1 on kernel version 2.6.32-5-amd64 (Debian Squeeze). ...
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2answers
1k views

Convert RAID 1 to RAID 10 in mdadm

In my current Ubuntu server, I have 2x 2TB Western Digital RED hard drives in a RAID 1, using mdadm. I would like to add 2 more 2TB RED drives, and convert it to a RAID 10. I realize I would have to ...
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0answers
121 views

Difference in Storages Spaces feature between Windows 2012 Server & Windows 8

So here it goes, I have a test bed setup, a machine with three harddrives besides the OS drive and installed on this machine is Windows 2012 Server Standard. I have the following Storage Spaces ...
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2answers
75 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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1answer
376 views

Restart degraded RAID array after crash

I've had to (temporary) reduce my RAID5-Array, so that there are four out of five disks available. Things getting worse as my system crashed during write process. After reboot the system wants to ...
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1answer
89 views

Need to run a program if a hard drive fails using Mega-raid software

I am hoping to run a program when a hard drive fails. I am using Mega-raid software on a windows server 2008. I was thinking of using windows event viewer, to run a program when an event comes in on ...
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1answer
98 views

How can I delete soft/motherboard RAID 1 from a different computer?

I have a drive. It was part of a RAID 1 mirror on a motherboard-based raid controller (nVidia controller on an ASUS A8N-SLI Deluxe), which, if I understand correctly, is considered to be "soft" raid, ...
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3answers
28k views

How do I reactivate my MDADM RAID5 array?

I've just moved house which involved dismantling my server and re-connecting it. Since doing so, one of my MDADM RAID5 arrays is appearing as inactive: root@mserver:/tmp# cat /proc/mdstat ...
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1answer
141 views

Resume mdadm array build after power outage?

I was building a 2tb x 4 disks using mdadm. Originally mdstat said it was going to finish in 48 hours but unfortunately at 47 hours a power outage came into play :-) So I decided to zero out the ...
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1answer
3k views

Windows Server Software RAID 6

I want to set up a software RAID 6 configuration, but in Windows Server 2008 it only lets me do up to RAID 5. In Server 2012 I saw they have this new thing called "Storage Spaces" which sounds neat, ...
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1answer
573 views

SATA Raid-0 Mixing SATA-II + SATA-III: Change jumper?

I have 2 SATA hard disks They are 2 TB each. Both are WDC Greens Respective models of *EARS *EARX EARX is SATA-III While the other is not. While the raid does function as is, would there be any - ...
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1answer
3k views

How do I safely move a Windows 7 software RAID 1 volume to a new PC?

I have 2 identical drives in an old PC running as a mirror RAID (RAID1) using the Windows 7 software RAID. These drives are data-only drives and are not being used to boot an operating system. How do ...
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1answer
51 views

Can I go from noraid to raid1 to an existing Windows installation?

I am planning to switch from Ubuntu to Windows 7 for my HTPC and later add an extra 3TB disk. Can I install Windows 7 on a 3TB disk and later add a disk and upgrade it to 2x3TB software raid1 without ...
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0answers
631 views

mdadm RAID monitoring no DegradedArray email

So, I have a couple of MDADM RAID arrays and I want to set up monitoring with email notifications for drive failures through sSMTP but I can't seem to get it working. The system in question is a ...
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2answers
349 views

Reduce loadtime in games merging two folders across ramdisk and local disk

I've found a program to emulate a drive in my memory, RAMDrive. RAMDrive creates a drive (G:) on my computer, which allows me to have super fast read/write on that drive. Now I was thinking I could ...
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2answers
174 views

software RAID in Linux - system partition on a separate drive?

I'd like to build a cheap NAS with two drives in RAID1 configuration using Linux software RAID. What are the pros and cons of having a separate system drive? My main concern is reliability of the ...
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1answer
366 views

Adjusting mdadm priority on Ubuntu

I have Ubuntu 12.04 running on my new server, and it is setup to run off of one drive, then 2 drives that are mirrored using mdadm. When streaming files or media from it, it is extremely slow. I was ...
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1answer
244 views

alerting you when a hdd is missing with software windows raid

So I open up Computer Management on my file serving computer in what has to be the first time in months or maybe even over a year and see that the mirror I had created of my 1TB HDD has "failed ...
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1answer
99 views

Why make a partition at all for mdadm/raid?

i have 4 disks, sd[a,b,f,g] of various sizes that I want to 'merge' together. I am using mdadm to achieve this. my question is, what's the difference between -- mdadm --create /dev/md0 ...
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0answers
60 views

Software RAID failed to mount after apt-get upgrade

I have a software RAID 10 (jfs) on an ubuntu 12.10 and require some assistance repairing the RAID after it failed to mount after a routine apt-get upgrade followed by a reboot. /dev/md0: Version : ...
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2answers
97 views

Is it possible to migrate a software RAID5 array to RAID0?

So last year I helped my father in France set up his Office machine with a RAID5 array of 3 identical 1TB drives (for a combined space of 2TB). Last week one of the drives died, he's using the machine ...
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0answers
699 views

Unable to reassemble md raid on drives pulled from ReadyNas Duo v1

I'm toying with a ReadyNAS device that I've recently acquired. It is a SPARC-based box, and it runs linux. As device is pretty slow, I've pulled one drive out of array, hoping to populate it with ...
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2answers
599 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
18k views

How? Mount, Find & Recover DATA in HDD outside of Synology Box

How? Mount, Find & Recover DATA in HDD outside of Synology Box I had originally posted this question here on Synology Forums and no real solution was suggested except a Linux / RAID based ...
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1answer
65 views

Linux software RAID: Does it work if device nodes change?

If, for some reason, hard disks change device identifiers (e.g. /dev/sda becomes /dev/sdb and vice versa) does this affect a Linux software RAID system? I.e. would the device still work (assuming boot ...
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1answer
173 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
3k views

Windows 7 and software RAID 1 for system [closed]

So I have been using Linux software raid for ages, unfortunately now I need to install Windows 7 on a notebook and since the machine has two disks I was wondering how do I setup software Raid in ...
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2answers
780 views

Windows 7, raid 1 with advanced format drive

I had a nice software raid 1 (using windows 7 raid) working when one of my drives failed. I replaced it by another one (WD blue 1 TB) which uses 4k sectors, and this makes windows unhappy (Cannot ...
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1answer
2k views

Windows 7 Dynamic Mirror Fails Redundancy

I have two 1TB HDDs forming a single volume in Windows 7 with a "Mirror" layout and a "Dynamic" type. The status is "Failed Redundancy" according to the Disk Management tool in the control panel. ...
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2answers
3k views

Are there any good software-based RAID 1 mirroring alternatives to Windows 7 Computer Management?

I only have Windows 7 Home Premium, not Professional, so the mirroring option isn't available in Computer Management. Are there any good alternatives? It's possible RAID 1 is overkill for what I'm ...
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1answer
2k views

Degraded RAID5 and no md superblock on one of remaining drive

This is actually on a QNAP TS-509 NAS. The RAID is basically a Linux RAID. The NAS was configured with RAID 5 with 5 drives (/md0 with /dev/sd[abcde]3). At some point, /dev/sde failed and drive was ...
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1answer
234 views

how to boot without assemblying raid arrays (or assembling them correctly)

I had one debian 6 system with two harddisks on raid1 set up via mdadm. built on simple partitions (/dev/sdb3, /dev/sdc3). at least on the old system, everything is tied up via UUIDs. then i inserted ...
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1answer
651 views

Find files affected by bad blocks with md-raid5 and LVM

I've been doing a lot of research on this topic over the last few weeks - and I think I'm close to completing my recovery, as much as is possible at least. To make a long story short, I'll just ...
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2answers
124 views

Is there such thing as a half duplex raid-1?

I was thinking the other day. Then again, just now: So I thought "if I thought of it, someone else must have." So this idea was, in a raid-1 mirror(ish), One drive will write, and one drive will ...
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1answer
3k views

Setting up Intel RST on Ubuntu 12.10

I want to know if it is possible to set up caching using my notebooks mSSD that runs ubuntu 12.10 and Win 7 on the HDD. I use ubuntu much more and would prefer to cache files that it uses rather than ...
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3answers
1k views

How to recover data from software RAID 5 disk partition

I have CentOS 5.8 on my computer, with 5x 1TB hard drives. I used software RAID. (RAID 1 as a boot partition md0, RAID 0 as a root partition md1 and RAID 5 as /home partition md3). Unfortunately one ...
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1answer
1k views

Software RAID 1 broken, how do I fix this?

I'm running CentOS 6 x86_64. There is a software RAID 1 being used on the two internal 80GB drives. I got the following e-mail sent to me: A DegradedArray event had been detected on md device ...
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0answers
50 views

Do a Re-Build During a Re-Shape?

On my Linux software RAID 6 array, I'm currently mid-reshape and 2 drives have been marked as failed. I've swapped them out and added new ones to the array, which are currently marked as spares. The ...
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2answers
7k views

Set up raid 1 after OS installation

I bought 2 Lenovo thinkstation E31 and I want to set up RAID 1 on them. I added a hard drive for each. I went in the BIOS and set it to RAID then I pressed ctrl-l to start the raid manager but it ...
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1answer
43 views

Old Raid pops up and destroys everything

I have a root server with a mdadm two-disk raid 0 on Ubuntu. One HDD failed and I continued to work on the second. The server hoster somehow repaired the defect HDD and after a server restart it was ...
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1answer
88 views

Linux RAID Re-Shape Stopped

For the past 8 hours my mdadm re-shape process has been stuck. The output is: Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] md0 : active raid6 sdo[11] ...
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1answer
106 views

Software raid hard, change the primary hard drive

I have a windows server 2008, and 2 hard drive which set as RAID 1, now the primary hard drive report some error and have to change. I have backup of major data but I have many setting on it's IIS and ...
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1answer
372 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
8k views

How can one setup RAID 1 in Linux Mint 13?

I am trying to setup a Linux Mint 13 system using mdadm, with 2 1TB hard drives for a software mirror. I have tried following instructions found for Linux Mint 12, but the instructions fail to mention ...
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0answers
545 views

Is there any way to stop or pause Windows software raid re-synching?

I have two physical disks, each one holds two volumes, they are Windows software RAID1. E.g.: Disk A: Partition1 Partition2 Disk B: Partition1-Mirror Partition2-Mirror After an unclean ...
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2answers
2k views

Debian installation and RAID5

I just bought a HP Microserver for use it as dns, http, vpn, file storage and also for backups of other computers at home. I already have 2 1Tb HDD's, so I thought to buy another 2 HDD's and install ...
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2answers
1k views

FreeNAS RAID5 Server - CPU Choice

What factors should you consider when choosing a CPU for a FreeNAS server? What are the implications and limitations based on CPU in this context? Currently I'm looking to build a FreeNAS server ...
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2answers
2k views

Testing software RAID5 by pulling a HDD live. Bad idea?

I'm running Ubuntu Server 10.10, with software RAID5 and LVM running on top of that. I have four 2TB HDDs. I also have a separate boot drive with incremental full-system snapshots that run every four ...