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Questions tagged [raid-1]

RAID 1 is the official name for mirrored disks or volumes

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RAID1 restoring and upgrading

I have a server running CentOS 5 in a software Raid 1 (2 Drives) One of the drives has degraded and these drives are SATA 250GB @ 3Gbps not 6Gbps, I was wondering what If I slapped in a 500GB @ 6Gbps ...
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How to create raid1 mirror for existing mdadm raid0 - without overwriting data

I created a /dev/md1 raid0 across two drives, added ext4 filesystem, and it's mountable and working fine. I created a /dev/md2 raid0 across two drives, added ext4 filesystem, and it's also mountable ...
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raid 1 - single disk

I'm reaching out to you as I messed up my raid 1. It all started with a broken disk. I replaced the disk with a new one. The sync seems to be successfull. However, I'm getting tons of errors and the ...
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System really limited by disk IO? Rate in atop much lower than expected

I have a system with two 2TByte SATA disks configured as a Raid1 array. There are times when the cpu is waiting for I/O for more than 20% of the time (output from sar) e.g. 09:25:01 CPU %...
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How to secure erase a Western Digital My Cloud Mirror (Gen 2)?

Before transmitting a Western My Cloud Mirror 6TB NAS storage in RAID 1 (2x 3 TB) from one customer (selling it) to another one (buying it), I need to wipe the data, whilst preserving intact the ...
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Can't boot from MDADM array after creating other arrays and rebooting

I recently installed Ubuntu 18.04 Server on a pair of drives in RAID1, which I set up using the installer. Previously, I was able to boot into the RAID install without any problem (even though it ...
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Adding third disk to BTRFS to RAID-1 did not increase size as expected

Original setup was having BTRFS RAID-1 with 2x3TB disks. I now added a third 4TB disk and did a btrfs balance. I did see the available disk space in df increase, but not to the amount I expected, ...
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Raid1, three of more drives, solution to multi-terrabyte setups in small businesses?

With the space to cost ratio of hard drives leading to capacities that present an increasing challenge to parity Raid systems (URE probability, multi-day rebuilds stressing drives and risking ...
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Read Raid 1 HD as External HD

I had two drives on a raid 1 but the motherboard literately caught on fire (tis was a brand new comp/board). Comp was rebuild but the drives were not spinning. Change the board on both HDs and they ...
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mdadm RAID 1 not activating spare after replacing faulty drive

Have issue with mdadm similar to Simple mdadm RAID 1 not activating spare: have replaced faulty HDD in RAID 10 fdisked and added new hdd to mdadmn mdam resynced array After that I see following: ......
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Would it be advisable to have 2 raid-1 (mirror) using just 2 physical drives compared to just 1 raid-1 on 2 physical drives?

I'm using 2-bay drive Synology (implies I'm using linux mdadm software based RAID system). The motivation for doing so is to lessen the time rebuild RAID-1 array after it goes degraded. I currently ...
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108 views

How to check/repair a RAID1 array?

I’m currently using a software RAID-1 array on linux, built on top of a HDD and a SSD. I have a strong feeling that the SSD is failing. I’d like to check how bad the SSD is behaving. I ran a check of ...
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Weird drive conflict in windows 10 with some programs

I've got a RAID1, and an EX-RAID1 that was de-raided and is now a standard disk. In some programs, such as the duplicate finder I use, it seems to think both are the same disk. i.e. :E:\<->L:\, ...
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Raid 1 and upgrading to bigger hard drives

I currently have a pair of 2Tb drives in a case that will take up to 4 hard drives in hot swappable bays and have up to now been manually copying files from Drive 1 to Drive 2......manually doing what ...
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RAID 1 disk goes 100% activity all the time with 0 read/write with 0ms response

I have setup software RAID 1 in windows 10 v1709. Main disk is SATA3 ssd but I have also two 3TB Seagate disks in software RAID 1 (mirrored). I have this setup for a few mounths and I had no problems ...
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How do I image an existing Win 7 32bit system into an Intel Rapid Storage Technology RAID 1?

Attempting to convert an existing Win 7 32bit system into an Intel raid. Current Process: Boot to non raid drive and install Intel raid drivers. Use minitool to migrate OS to separate drive. Enable ...
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btrfs RAID1 - should I create subvolumes which can be mounted separately?

I plan to construct a btrfs RAID1 spanning over 2, or maybe 3 devices. This will mainly be used to hold data for a samba server, but maybe I'd want to add other uses (like mounting /var/snap/ or /...
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btrfs RAID1 - does adding a 3rd HD add data security?

would spanning a btrfs RAID1 over 3 drives allow for 2 drives to fail, before data loss? Or in other words ... "is a btrfs RAID1 on 3 drives more data save then one with 2 drives"? EDIT: or would ...
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Unable to install Windows 2012 R2 on Raid 1

I have a problem installing Windows Server R2 on a HP ProLiant 360e Gen8. There is a Raid 1 with 2 600GB SATA disks configured inside the b120i Smart Array Controller. First time i fired up the ...
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167 views

System Clone to a new RAID1 Array

I have a Lenovo ThinkServer TS440 system. It has a Win10 system. Two SSD drives in RAID1 array were setup. One of them just failed. I removed that one physically, removed the RAID1 in BIOS, and now ...
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Time Machine to two external USB drives vs Time Machine to 1 external Raid-1

Recently I purchased an iMac Pro with an internal 2TB SSD and restored my system from an external 1TB HDD Time Machine backup as originally created by my old MBP. For the time being I have continued ...
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Replacing failed disk with Dlink DNS-320 NAS

I have a NAS (Dlink DNS-320) and one of my 2 RAID1 disks failed (showing amber color). I bought a new HDD (same mark Seagate, same size 2T). After replacing the failed disk, no more amber led and ...
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btrfs subvolume differential send

I want to use btrfs snapshots plus send/receive for backing up my Ubuntu to my new RAID1 (mirrored) desktop disks. And the same for my data. Both create and send/receive work for a snapshot of / in /...
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RAID1 Drives Have Separated

My wife came to me yesterday and asked me when I installed a new hard drive in our home office computer. Since I hadn't installed any new drives I hopped on and saw that my 2-disk RAID1 drive had ...
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Access disk1 of RAID 1 as regular disk on different computer

Im using a Lacie 2TB DAS that's configured as a RAID 1. Basically, disk0 is mirrored to disk1. By the time it goes full and I removed both disks from the bay, could I access them on to different ...
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132 views

What do these lights on my server mean? Has my HDD gone bad?

So I got to work today after backing up this server over the weekend. I rebooted the server and it started running in the default windows OS and everything seemed to be working fine except for these ...
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834 views

Event ID 55 on Server 2012

Keep receiving the following error message in Event viewer on Server 2012. How do I find out which drive this belongs to. Have searched but can't find anything useful. The Server has raid 1 array ...
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Error encountered when trying to install Windows 10 with SATA mode set to RAID

I received the following error when trying to install Windows 10 after I have changed the SATA mode from AHCI to RAID. Windows cannot be installed to this disk. This computer's hardware may not ...
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Reusing raid1 disks by wiping them (Windows)

I had a raid 1 desktop system with 2 1tb drives. The motherboard died. I bought a motherboard without Raid capability (ASUS B250-Plus) When I put the old drives in the new system, it seems the ...
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107 views

Cloning a RAID-1 Array in Linux to a Larger Capacity Drive

I have two existing Fonality (Asterisk based) VoIP servers that I would like to upgrade the hard disks on. Both servers have RAID1 arrays consisting of 2 80GB SATA drives. Here is the output of df -...
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PERC RAID1 Hard Drives Access [duplicate]

I have a dell poweredge r210 ii with two hard drives connected as RAID1 with PERC. This server got some hardware issues which preventing from booting and now I want to access the data of these ...
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1k views

Add redundacy disk to Synology Hybrid Raid

I have a DS216j NAS by Synology that currently hosts a single 4 TB disk. Volume is set to SHR (Synology Hybrid Raid) (without data protection). Now I bought another disk, same model, same size. I ...
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RAID-1 HDD data access in another system

I have Dell Power Edge R210 ii with RAID 1 implemented (2 x 1TB) and windows server 2008 R2. My server got some hardware issues which is not booting and I tried to connect hard drives to a windows 10 ...
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344 views

How to decrease the size of an Intel RAID 1?

Windows PC with Intel Chipset and Intel RAID-1. Currently the RAID 1 runs on two 1TB HDDs just with drive C. I want to change this to a RAID-1 with two 512GB SSDs for drive C and RAID-1 on two HDDs ...
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Server 2008 will not boot after mobo swap

Current Spec: Intel i3-3220 GA-H77-DS3H (New) 1x8gb ddr3 1600 2x500 gb WDC wd5003abyx drives; raid1 windows server 2008 R2 foundation The system was working fine utilizing the gigabyte GA-h77m-d3h ...
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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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RAID-1 corruption: Possible to apply catalog data from one disk to another?

More details can be provided, but here's the basis for the question. I just had a RAID-1 hardware failure which has resulted in an unusual situation: Disk A, containing the file catalog data, but no ...
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167 views

Can't find RAID1 after reboot

I have Debian8 with Open Media Vault on it. I'm tring to build a RAID1 with two Seagate Ironwolf 6TB. I can build the RAID1, create an ext4 partition on it and use it without a problem. The problem ...
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Recovering data from not initialized volume

I had two disk RAID1 volume configured through RST option ROM. Couple of days ago I've reset BIOS to default configuration and lost RAID1, disk were transformed to Non-RAID and appeared as separate in ...
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How do I configure Hardware RAID when installing Ubuntu?

I have a DELL precision workstation which is supposed to have a Hardware RAID controller. However, I have no knowledge/experience with setting up that kind of system. It is currently running Ubuntu 14....
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Mirroring vs sector size in Win8

In Windows 7, disks with different physical sector size can't make up a mirror set. Is that still the case in Windows 8/8.1/10?
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361 views

GRUB Issues with ubuntu 16.04 64-bit software RAID 1 install

I am installing Ubuntu 16.04 on a 1u using a software RAID1. I've done this many times with previous ubuntu releases but for some reason 16.04 doesn't like my software RAID1. I've reconfigured it many ...
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28 views

Is it possible to setup RAID10 and RAID1 (on spare space) with 4 HDDs with 2 different sizes?

I have NAS setup with 2x 8TB and 2x 2TB drives.. Is it possible to setup RAID10 with 4TB of usable space (2TB used from each drive) and for the other 6TB in 8TB drives, setup RAID1? Do you just need ...
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894 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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Mirror multiple physical drives to one partitioned drive in Windows 10?

Using 'Disk Management' in Windows 10 - can I clone three physical 1tb drives to one physical 3tb drive, partitioned into 1tb partitions; i.e. a 1tb partition, mirrors one physical 1tb drive (......
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60 views

Unable to configure drives on Intel S500VSA server board.

I am installing two 2TB SATA drives on an Intel S500VSA server board. I want to configure a RAID 1 array. When I log into the RAID configuration panel with Ctrl-E I find that the two drives are ...
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310 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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52 views

Both RAID hard discs are not readable in Windows

I have a small network backup device that does mirror backup to two HDDs. Recently the backup stopped working. When I check the hard drives in a hard drive reader, Windows caanot read the drives and ...
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56 views

Restore RAID1 after motherboard change

I have a RAID1 (2 drives, mirror) on an Advantech AIMB-782QG2-00A1E motherboard (Intel Rapid Storage Technology). The motherboard recently died so I have ordered a new one (same model). Do I need to ...
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How does an IBM ServeRAID controller know which drive to recover during a RAID1 rebuild? [duplicate]

I have an old IBM x3550 7978 server at work, which has a ServeRAID 8k-l RAID controller. I setup RAID 1 on it, and it seems to work great, but before I run any production OS on it, I want to know how ...