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Questions tagged [raid-1]

RAID 1 is the official name for mirrored disks or volumes

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Is there any scheme for backing up and sharing data?

I have a system/application generating a certain amount of data, let say it's something like 8Gb in the morning and 8Gb in the evening. It is expected that all this data will be stored in two ...
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libata.force ignored on xenserver 7 (CentOS)?

I'm having issues with a RAID Controller, the ASMedia ASM1061 plugged in the bottom PCI-E x1 slot of my Asus Sabertooth x58. I currently have 2 WD Red (WD10EFRX) disks connected to it configured as ...
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RAID1 on 2x HDDs with Solus Linux on SSD - WON'T BOOT

I have Solus on my wife's computer installed fully onto a 128gb SSD. I had a fresh 1tb HDD and our old 1tb HDD that I decided to put into RAID 1 following this tutorial. Everything completed perfectly ...
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How can I create 2 identically sized ext4 partitions on separate devices with resize2fs, parted and mkfs?

I am playing around with a Raspberry Pi and am running a small cluster for Docker and things like Nextcloud/Plex. I wanted to try out setting up a software RAID1 using 2 drives I have lying around. ...
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HDDs don’t work properly with Dell 6/IR Raid Controller

I maintain a Dell PowerEdge T410 (running Windows Server 2019 Essentials) with a SAS 6/IR RAID controller configured with a RAID1 of two Seagate Exos E 7E2 1TB (link to exact specs here) HDDs, which ...
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35 views

Best data security cache settings in windows Intel Rapid Storage Technology for Raid 1 and Raid 0

I have raid 0 - 2 x SSD - used as windows disk raid 1 - 2 x 4 TB storage - used as data backup extremely important I am rather interested in best data security and reliability rather than speed ...
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Dell Power Edge RAID Setup

Hi I have Power Edge T130 with on board RAID controller. I connected 2 500GB SSDs and 2 7TB HDDs and create RAID 1 using life cycle control but I want to Create 2 drives SSD for OS and HDD for Data ...
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Other ways to control ARC-1200 RAID status

I am having a problem managing the RAID disks we have on our workstation. There's already an ARC-1200 controller from ARECA and we have Win 10 OS. I have installed the ArcSAP controller Utility. ...
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Linux RAID1 disk not booting in new PC - Gave up waiting for root device

I had a Debian linux PC with two hard disks using raid1. Used is as DHCP and firewall. The raid1 consisted of two partitions, md0 as swap, md1 for / . The motherboard in that PC stopped working, and ...
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46 views

Do I need to wait for 100% resync?

I have set up a mirrored partition in Windows 10. Today I noticed a lot of disk activity in task manager for no apparent reason. Looking up the disk management, I see that it is resynchng. In task ...
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mdadm re-added a removed disk to my RAID1 and skipped re-sycning it, what went wrong?

I ran into what is a true mystery to me today, and would love if someone could give me an idea of how what happened is even possible. We had physically removed a disk from our software RAID1 (Ubuntu ...
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how can I add SSD as RAID 1 cache?

I have 2x 3TB hard drive setup as software RAID 1. sometimes, it was painfully slow. How can I add an SSD as its cache? is it possible? Note : the RAID was where the debian linux inside booted from....
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File system corrupt after re-adding software RAID 1 member after test. Why?

A colleague and me set up a software RAID 1 with mdadm consisting of two physical disks, with two partitions on the virtual device. The set up went fine, and booting directly from one of the RAID ...
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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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84 views

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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130 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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54 views

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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482 views

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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201 views

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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262 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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331 views

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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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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201 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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1k 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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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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151 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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2k 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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124 views

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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455 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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48 views

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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277 views

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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52 views

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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202 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 ...