Questions which refer to software RAID implementations.

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1answer
213 views

Adding sda1 vs. sda to a linux software raid

I'm running a Linux md software RAID 6 on several USB hard-drives. Each drive is partitioned to contain one partition of type fd (linux raid). My RAID is built on these partitions, i.e. it uses sda1, ...
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1answer
449 views

RAID 5 degraded performance

I'm currently rebuilding my fileserver, but because of SATA port limitations, I can only use 5 disks at a time. I've remove a drive from my original RAID, so I've been able to create a new degraded ...
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1answer
1k views

Assembling an mdadm array with “possibly out of date” disks

I've recently moved house and have had some power problems after switching on my file server that's using a mdadm RAID5 set up. The file system I'm using is ext4. It seems that at some point two (of ...
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3answers
855 views

Can a secondary SATA drive under Win 7 Pro software RAID 1 mirror be boot-able with no hassle?

Using Windows 7 Professional software RAID 1 (Mirror) of two identical SATA drives is it possible in the event the primary drive fails that the system may boot off the secondary drive without doing ...
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2answers
1k views

Why am I seeing such low SMB transfer throughput?

Ok, there's a bit more to the story than the title implies. Background and Environment: I'm copying several TB from an older Ubuntu server to a newer Windows 2012 server over SMB. (Technically, it's ...
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0answers
602 views

md0 RAID1 can't read superblock

i have a problem with my md0 array, which is an raid1 (2 mirrored USB-Sticks) Mount gives "Can't read superblock" cat /proc/mdstat: Personalities : unused devices: <none> fdisk -l ...
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1answer
2k views

Reducing Linux Software RAID Rebuild Speed?

This may sound silly, but is there a way to intentionally reduce the speed of a rebuild in a Linux Software RAID? (Basically reducing the throughput of all of the disks so that it's not maxing out.) ...
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2answers
330 views

RAID on partitions or devices

I plan to create a software-only Linux MD RAID10 array from two identical 1TB discs (using mdadm). Should I create it directly on the two disc devices (/dev/sda and /dev/sdb) or create a partition in ...
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0answers
46 views

erased md0, md1 and can't recreate them

I previously had a working RAID 1 array. I think as a result of running grub-install /dev/sdb and grub-install /dev/sdc I somehow wiped my computer of md0 and md1. I need to set them up again. When ...
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2answers
506 views

Unable to create software RAID volume in unallocated space on primary disk

I have two disks that I'd like to partially combine into a striped volume (RAID0). Disk 1 contains the primary partition that boots into Windows 7 Professional, disk 2 is currently not used. On disk ...
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1answer
230 views

Windows Software RAID: How can I view the Windows RAID parameters (disk signatures, etc.)?

The software RAID array in my Windows 7 x64 box failed. Drive tests report the drive itself as healthy. Two drives, RAID1 partition and one RAID0 partition. In Disk Manager, the failed drive shows up ...
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1answer
886 views

mdmda raid 1 - spare drive after SATA cable change

Yesterday my hoster changed a SATA cable of one of my hdds, when my server came back up again cat /proc/mdstat showed this Personalities : [raid1] md124 : active raid1 sda1[0] 4193268 blocks ...
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0answers
153 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
484 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
271 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
2k 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
125 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
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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1answer
405 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 ...
0
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1answer
97 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 ...
0
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1answer
109 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
35k 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
155 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, ...
0
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1answer
619 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
52 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
708 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 ...
2
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2answers
377 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 ...
0
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2answers
183 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 ...
0
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1answer
413 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
313 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 ...
2
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1answer
110 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 : ...
2
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2answers
152 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 ...
2
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1answer
790 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 ...
0
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2answers
683 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 ...
2
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1answer
20k 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
66 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 ...
0
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1answer
188 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
4k 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
823 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
3k 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 ...
2
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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
248 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 ...
8
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1answer
716 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
131 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 ...
3
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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 ...