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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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RAID 1 configuration does not show after installation

I used the HP Smart Array Configuration utility to setup a RAID 1 array (hardware P400 controller) using four disks. I created 2 logical drives with physical hard drive 2 mirroring drive 1 (o/s drives) and physical drive 4 mirroring 3. After…
rookie
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How do I find out which disk in a multi-disk mdadm RAID1 triggered a rebuild?

I'm using mdadm for several RAID1 mirrors. md7 is an N-way mirror consisting of 3 spinning disks (all flagged write-mostly) and an SSD: md7 : active raid1 sdd1[0] sde5[3](W) sdf5[4](W) sdc1[1](W) 234428416 blocks [4/4] [UUUU] md6 : active…
rob
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RAID1 rebuild fails due to disk errors

Quick info: Dell R410 with 2x500GB drives in RAID1 on H700 Adapter Recently one of drives in RAID1 array on server failed, lets call it Drive 0. RAID controller marked it as fault and put it offline. I replaced faulty disk with new one (same series…
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Dead Linux server - need help and options

I have a Dell PE 1950 with 2 SATA drives in a software RAID1. OS is CentOS 5.5 (2.6.18.x). Starting this afternoon we received HW errors (something on the bus is bad, E171F) and the machine became unresponsive. We hard booted and it came back up for…
Choi S.
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Where is my new hard disk Citrix Xen Center

I'm trying to create a new storage repository on a server that already has 2 old hard disks, set up with hardware RAID 1. It's my first time doing this in Xen Server environment so I wanna be extra careful not to mess up anything or lose the data on…
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/boot on separate disk or on the raid array

I have 3 ssd disks (59 GB) each. I want to use them as sofware raid5 with fedora 15. I read that it is recommended to have /boot on a separate disk. 2 questions: 1) is it possible and advisable to have a 6 GB partition on each disk (and make them…
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Backup data from RAID 1 disk out of its server

I'm facing with a pretty easy problem in my opinion. I've extracted a working disk from a RAID1 and I'm looking to copy only data (FS and RAID configuration doesn't matter) into another location (another FS). My problem is I'm not able to mount…
Doomsday
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Moving hdd with ESXi to another computer

I have ESXi with multiple virtual machines on it. My disks are configured as RAID1. I'd like to move these disks to another computer, and I'd like to know if ESXi and the virtual machines would be managed on that new computer as if nothing is…
Milana Malkic
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RAID for load balancer needed?

We have two load balancers, one used as hot-standby. Would you recommend me using a RAID1 setup in case of a harddisk failure? Or is RAID1 not needed as in case of a failure the hot-standby server takes over?
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lvm over two raid1's - one slow, one fast. What will happen?

Two software RAID1's, 0: 2x 15K SAS drives, 73GB 1: 2x WD Caviar Green, 3TB So the first RAID is a faster one, the second a slower data grave. What happens when I add both to a LVM logical volume so they form one large partition? I don't expect lvm…
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Raid1 degraded after every reboot

After setup, cat /proc/mdstat output looks like this: proxmox:~# cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid1 sdc2[1] sdb2[0] 293024832 blocks [2/2] [UU] unused devices:…
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SSD redundancy via HDD

Is there a way to guarantee redundancy to an SSD using an HDD? Raid 1 is the best choice to guarantee redundancy in HDDs, but SSDs are too expensive to guarantee redundancy via RAID. If I was to couple an SSD with an HDD, could I guarantee…
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booting a system with failed devices in a RAID1 array

I have a Linux system set up with 3 software RAID1 devices, each of which comprises two identical partitions on two identical disks. Recently, one of the non-root partitions on one disk began experiencing DMA errors; I therefore marked it as failed.…
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Motherboard fried on Windows RAID 1 System, do I have to reformat?

A faulty power supply fried my motherboard and I need some help. I had a spare motherboard lying around and hooked it up to one of the hard drives to see if I could just continue chugging along. Unfortunately Windows continues to BSOD with error…
Spencer Ruport
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grub2 does not find /boot on RAID1 md0 device

I have RAID1 md0 for /boot consisting of 4 partitions (sda2, sdb2, sdc2, sdd2). I'm using GPT on 2TB HDDs, so first partitions on each disk (sda1, ...) are 1-megabyte bios_grub partitions. I also have RAID10 md1 for LVM (containing /) and RAID0 md2…
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