RAID 1 is the official name for mirrored disks or volumes

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634 views

Is TRIM disabled even with Windows Soft RAID 1 (Windows Dynamic Disks)

I am looking to build a Windows 2008 Server and wanted to use a RAID SSD array, either via SATAIII or PCIe. Everything I've seen that RAID does not allow TRIM commands to be passed to the SSD, ...
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1answer
11k views

How can I mount a single RAID 1 disk/partition as ext3?

I need to copy data from a single HD, which used to be part of a Linux RAID 1. I've googled around, but can't find any clue how to mount partitions from this single HD. Background: The HD comes from ...
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1answer
101 views

RAID 1 without cache protection - ZMCP/backup battery

I'm running RAID 1 on an Adaptec 6405. I'm trying to decide if I need to install the ZMCP on the card to provide Cache protection. Adaptec's ZMCP is the equivalent of a BBU - battery backup for the ...
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1answer
217 views

Booting Ubuntu with a RAID-1 Boot Failure

I'm planning on picking up 2 SSD cards for my file server and installing Ubuntu on them using softRAID-1. I will not be keeping a hot spare, so I want to make sure that, if one drive fails, I can ...
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1answer
6k views

Install Linux mint with Raid

My MB supports fake raid (Intel DH67CL motherboard). But I was using the system in 'software raid' as I could not correctly set up fake raid in Debian. Now, I decide to use Linux Mint 12. During the ...
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1answer
124 views

Can't write to raid on Fedora

I just did a fresh install of Fedora 11 and added Raid 1 following this tutorial: http://www.optimiz3.com/installing-fedora-11-and-setting-up-a-raid-0-1-5-6-or-10-array/ Now I see the filesystem when ...
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1answer
2k views

RAID 1 Mirror Error with Two Western Digital 500GB Drives

I have Windows 7 Ultimate 64 bit installed on a Western Digital 500GB drive (WD5000BEVT-22ZAT0) that was partitioned automatically by Windows as 100MB System Reserved and 465.66GB drive C. There is ...
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1answer
999 views

Windows 7 mirrored volume fails during testing of fail-over mode

I have two hard-drives mirrored (i.e. RAID-1)to be my D: volume (non-boot drive) in Windows 7. Click to enlarge. This is the first time I have tried mirroring in Windows 7, but I've had (sometimes ...
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1answer
398 views

Add a small RAID card? Will it help overall stability and performance of my nine hard drives?

Will I get any extra genuine added performance and RAID stability if I insert a basic RAID card into a PCI-E x1 slot? I am considering the Adaptec 1220SA - 2 port SATA, PCI-express (1x), RAID 0/1. ...
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1answer
2k views

Unable to access intel fake RAID 1 array in Fedora 14 after reboot

1st I am relatively new to linux (but not to *nix). I have 4 disks assembled in the following intel ahci bios fake raid arrays: 2x320GB RAID1 - used for operating systems md126 2x1TB RAID1 - used for ...
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1answer
43 views

P8P67LE Motherboard - SATA MODE RAID; Create RAID 1

As it seems my ASUS P8P67LE motherboard has built-in RAID capability. My OS is previously installed in normal mode and in BIOS setting SATA MODE is set to AHCI (Advance host controller interface) ...
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1answer
80 views

Intel RST accidentally selected wrong drive as system drive — how to fix?

Question / TL;DR If Intel RST has marked a drive other than my RAID set as the system drive, how can I get it so that the RAID set is now seen as the system drive, and catch it up to my drive now? ...
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604 views

Windows 8 keeps deleting files from RAID drive

I have an ASRock Z77 Extreme4 motherboard with Windows 8 (not Pro). Brand-new computer, built from new parts. I use a 600GB drive (10,000RPM) as boot drive (let's call it HD1) and 2 3TB drives in a ...
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204 views

Use Intel Rapid Storage Technology with a secondary PCIe RAID card

I have Intel's RST on motherboard using RAID1 (2x2TB) and a boot drive. Trying to add another RAID1 (2x3TB) has failed since RST is limited to 2.2TB for RAID1. Now I've bought another RAID card in ...
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2k views

Why does an Intel RST RAID 1 array write faster with write-back cache disabled?

I have two HDDs (5900 RPM) in RAID 1 (mirror). I know, I know, it's painfully slow. I'm currently in the process of replacing them with faster drives, hence this question while I'm testing things. ...
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98 views

btrfs does not show drive as missing

I am trying out btrfs and I noticed some funny behaviour: I have two drives in a raid 1 configuration. sudo btrfs fi show Label: none uuid: 52b9c6f6-ce5c-4727-861e-e2fd012e475f Total devices 2 ...
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283 views

Super slow SDD write speeds with RAID 1

I have a very new computer system, configured in RAID 1, but was surprised that the write speeds were extremely slow! Here is a snapshot of my computer setup: Motherboard: Asus Z9PE-D8 WS ...
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438 views

Cloning Ubuntu mdadm RAID1

I would like to clone a pair of RAID1 drives created with mdadm. I've tried Clonezilla, but there's no native support for mdadm, so it resorts to using dd which is incredibly slow. I've looked for ...
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34 views

Mounting HFS+ (hfsplus) RAID 1 under Linux 3.13

I'm using a Linux Mint liveCD to rescue data off a Hackintosh which had its boot drive fail. I also have an HFS+ RAID 1 (created with Disk Utility in OS X) on separate drives in the system. ...
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40 views

RAID array failure. False positive?

Background: I have 3 storage units in my PC: an SSD that contains my operating systems a 1TB hard-drive that is about 5 - 6 years old a 1TB hard-drive that is only a few months old The 2 big ...
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106 views

Server has Crashed, How to Recover My Data from Raid-1 Configured HDDs?

I was using HP ProLiant ML150 G6 with Windows Server 2008 as File Server. Server is configured with 4x250 GB RAID-1. All of a sudden electricity fluctuates and the server got crashed. Now it turns on, ...
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464 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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133 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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224 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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213 views

Cannot read NAS drives formatted for Linux

I have two hard drives (mirrored) in a QNAP TS-209 Pro II NAS box that won't mount properly. They are formatted for Linux (EXT3 file system) and the problem appears to be with the NAS, not the drives ...
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How to create a mirror (raid-1) of an already setup and running ubuntu 12.04 system?

I have a fully setup ubuntu 12.04 installed on a single drive and formatting it just to setup raid-1 is not an option Unlike other answers like this one: Ubuntu 12.04 - Add RAID 1 Array on existing ...
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57 views

Software RAID 1 resync's on SATA cable switch?

I made a mistake when I opened up my desktop removed a 2 disk RAID 1 and reconnected them, but with the SATA cables switched, such that sda became sdb and viceversa. On boot, the RAID array started ...
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489 views

Data recovery from a single RAID1 disk

I extracted the disk from a Mybook World 2 (White Led). The device has only this 1TB SATA disk, and it is using RAID1. Yes, it is bizzarre, but WD enabled RAID even for a 1-disk configurations. This ...
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446 views

How to move a software RAID 1 to a new pair of larger drives?

I'm running CentOS 6 on a server that has two 80 GB internal drives, in a software RAID 1. I want to replace this two internal drives with 750 GB internal drives I have available. How do I do this ...
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99 views

How to add new partition to RAID-1 array on Redhat FC10?

I have a RH FC10 system with RAID 1 partitions, here is mdadm.conf: # mdadm.conf written out by anaconda DEVICE partitions MAILADDR root ARRAY /dev/md1 level=raid1 num-devices=2 metadata=0.90 ...
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321 views

Windows 7 : soft RAID1 and dynamic volumes reliability

My setup is quite classic nowadays : 1 SSD for system/apps and 2 HDDs for data setup in a fake RAID1 array. I also have a backup scheduled every week for the data drive in case it fails because I ...
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957 views

mdadm: hot remove failed

My RAID1 is degraded and I need to replace /dev/sdb. However, I could mark /dev/sdb5 (in /dev/md1) as failed and removed it, but I can't do the same with /dev/sdb1 (/dev/md0 which is mounted on /): ...
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188 views

Will Thermaltake Muse R-Duo Raid reset lose data?

I have a Thermaltake Muse R-Duo Raid chassis with two drives installed and DIP switches set to Raid-1. However, only the left lights are lighting up and I have data on the drive. I'm guessing it is ...
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164 views

Linux + convert RAID0 to RAID1 on Blade Server HS21

I have HS21 blade server My blade server configured as RAID0 – one disk ( disk with red-hat Linux OS ) My target is to configure the blade server to RAID1 – mirror with 2 disks ( I need to add second ...
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Can BIOSasissted RAID1 (with OS Linux) be rebuilded with a external HDD with windows?

I have created a RAID 1 BIOS assisted,booted from RAID 1 and installed Linux OS on it.I had a power outage and the RAID1 status now is Rebuild. My question is : can i rebuild this RAID1 with Intel ...
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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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37 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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40 views

how to use Intel RAID 1 on windows 7 boot drive

I have a motherboard with Intel RAID. and 2 new and empty 1T HDD. I want to use 2 HDD as RAID 1 (Mirror) to install Windows 7 pro (C: drive). What is the best or correct way to do it? I have ...
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28 views

How to read data from a Raid 1 drive

I have a Sharecenter NAS with two hard drives in it setup in a Raid 1. One of the drives has failed (making noise) and somehow so has the Sharecenter. I have a SATA-USB thing but my Win8 machine ...
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75 views

is it okay to mirror/raid1 different hardisk model in freenas

In my freenas system, I have several volumes running, one of them is consist of 2 3TB WD RED with different model (I forgot the serial, but they are different). Both are set up in a single mirror ...
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73 views

Data loss warning rebuilding RAID1 logical drive

I have a Windows 7 Pro server running RAID1 and from the log, it appears that it 'lost' a drive for a few seconds and now thinks that the RAID1 has failed. I assume it needs rebuilding, which I ...
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212 views

Fedora 20 stopped booting after migrating to RAID array

I have decided to migrate my working Fedora 20 installation onto RAID-1 software array. After this operation, I have a problem with booting my system. Background My machine is MacBook Pro (Early ...
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0answers
147 views

Can't add drive to mdadm RAID1 array

I have a mdadm RAID1 array in a production server. SDA fell out and when trying to re-add SDA3 to MD2 I think it failed. The syslog shows: [28375.974199] sd 1:0:0:0: [sdb] Add. Sense: Unrecovered ...
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extremely long reconnect time to network share

In the past I had used an iOmega and a Seagate Black Armor NAS, both run Linux, both ran perfectly fine until they eventually died. I next switched to an Apple TimeCapsule for both network storage and ...
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163 views

Can I convert a RAID1 disk to non-RAID under Windows?

I have a two-bay NAS on RAID1. I'm having problems accessing the NAS, and as a precaution I'd like to save the data elsewhere. I tried plugging one of the drives in my Win7 PC. Windows sees the drive ...
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284 views

Data recovery from a RAID1 disk

I extracted the disk from a Mybook World 2 (White Led). The device has only this 1TB SATA disk, and it seems it is using RAID1 This is a report from disktype: francesco@blackhole:~$ sudo disktype ...
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0answers
472 views

What triggers a RAID 1 mirror rebuild on a Lacie 2 Big USB3?

I have a RAID 1 mirror on a Lacie 2 Big USB3. When I break the mirror by pulling out one drive, keep making changes on the remaining drive and finally put the first one back in, the drives stay ...
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769 views

Windows 7 won't boot from raid-1 disks until secondary non-bootable disks are removed

I have an ASUS X58 motherboard with a Intel ICH10R southbridge raid controller. Bootable raid-1 SATA disks are on channels 4, 5. Secondary raid-1 SATA disks are on channels 0,1. Everything was ...
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635 views

dmraid -r" just returns No RAID disks

I have installed centOS 5 on our HP Proliant ML110 GH6 server and configured the Smart Array through BIOS Now, i would like to set up an e-mail notification with the RAID status (especially if it's ...
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0answers
622 views

Raid recovery in gigabyte GA-8I945 Pro

This was a working machine until a few days ago. And now it won't boot into the OS, during startup if makes clicking sounds (I think from one of the drives). Installed OS: Windows 2003 Web edition ...