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Questions tagged [raid1]

RAID 1 or Mirrored RAID uses two or more disks that store the same data.

RAID Level 1 or mirrored RAID uses two or more disks that store the same data. One disk is mirrored to the other. Write speeds are the same as using one disk, and read speeds are twice as much.

RAID 1 is used when reliability needs to be higher than normal.

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How can I increase the size of a RAID array on the fly?

Right now we have RAID 1 running on 2 1TB hard drives. They are nearly full so I would like to replace them with a 2 TB drive. Is there a master/slave with RAID 1? Am I able to just pull one of the drives and pop in a new drive, let the data…
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Proliant RAID 1 Rebuild Questions

I have a HP Proliant ML350 G5 server that experienced a power supply failure overnight. The power supply was replaced but unfortunately it got restarted with only 1 disk in the RAID 1 set plugged in. (The raid controller is the build in E200i). The…
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Extracting data from a RAID 1 array with out original controller

A Dell x346 server crashed (motherboard went bad) and I need to get a few files off of the hard drive. They are 2 SCSI hard drives in RAID 1. As far as I know both drives are fine. Can I just put one of the drives in another computer and get the…
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Can I keep the data on my Raid 1 drives if I move them to a new Raid controller?

I have a couple of servers I'm about to decommission and they each have 2 raid 1 drives. I want to take these drives and put them in a DAS but I am told that I will lose the data because the raid controllers will change. Is it true that even with…
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Remove dead HD in Raid1?

I am on debian, raid1, one of the drives seems dead. root@rescue ~ # cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sda2[0] 486279424 blocks [2/1] [U_] md0 : active raid1 sda1[0] sdb1[1] 2104448 blocks [2/2] [UU] unused…
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On-board RAID-1 or Software RAID on SUPERMICRO MBD-X7SBE Asterisk Heavy Use?

I am looking using the on-board RAID controller of my SUPERMICRO MBD-X7SBE to setup a RAID-1 array with two Seagate ES2 hard disk drives. We have around 8 or so of these in production. I am going to use this for heavy Asterisk use with all calls…
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Is it possible to recover data from an Intel PERC H710 Adapter RAID Controller disks into another server with SAS controller

I have a Dell T420 server with a PERC H710 Adapter RAID Controller. I had a RAID 1 with two hard drives. And another disk into the same controller, with no RAID only for backup. The Motherboard of this server now is damaged, It didn't boot because…
Olver Hernández Navarro
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Can I 'un-raid' my raid 1 setup

My dell T7400 has two 300G 15k SAS drives in a raid 1 configuration. I'd like to instead have a 300G 'C" drive and a 300G 'D' drive. Is there anyway to remove one of the drives from the raid configuration without having to reinstall the OS? and…
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Raid 1 default disk capacity is lesser than the disk sizes. Any ideas? Intel Raid Storage Technology - Raid from Bios

Here the screenshots I think they explains everything The disks are advertised as 1 TB and the real size of the disks are 931.5 GB I have installed windows server without raid setup for experimentation. Both disks are fully working with no…
Furkan Gözükara
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On Ubuntu, how do you recover data from a single disk of a raid array from another device

I have a 2 disk NAS device using RAID 1 mirroring. When disks started failing I wanted to buy bigger disks so as to upgrade the volume size. However the device couldn't handle mirroring the original data from the smaller hard drive to the bigger…
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When two different companies of hard disks can be raid together?

I'm trying to replace the hard disk due to the aging of the server computer. Currently, the server computer is composed of two 2tb hard disks as RAID 1. The model number of the hard disk is Seagate's st2000dm001. Will the rebuild work correctly when…
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While RAID1 is resyncing after create, can i write files to it immediately?

I searched but i just found this. How to interrupt software raid resync? My question is can i write files to my raid1 device while... [root@centos ~]# cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sdb[1] sda[0] 3906886464…
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Has this raid1 software array failed? (mdadm)

Long version: I am running a Red Hat Enterprise Linux 5 (REHL5) machine with software raid1 (mdadm). A few days ago I went to backup some MySQL data and all of sudden I could no longer log into the machine. I typed in a username to login and then…
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Boot failing to complete after resizing RAID 1 with GParted

So I have the following setup in Ubuntu 18.04: /dev/md0: / (ext4) /dev/md1: swap /dev/md2: /var/lib (ext4) I needed to free a couple of GB space after /dev/md2, so I decided to live boot using SystemRescueCD, and shrunk /dev/md2 with GParted which…
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MegaCLI RAID1 - Can't Replace Missing Disk

I have a RAID1 where I've replaced a disk with errors, however it will not automatically or allow me to manually replace the "missing" disk with the new one. Here are the physical disks per my controller: # MegaCli64 -PDList -aALL | grep -E…
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