RAID1 or mirrored RAID uses two disk that have the same data.

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Hardware RAID in CentOS 6.2

I have a ServeRAID-BR10il SAS/SATA PCIe Controller RAID O and 1 Standard. Do you have any suggestions how to install it in CentOS 6.2? All the tutorials I found are only software RAID. Hope you guys ...
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1answer
87 views

Installing MySQL in CentOS 6.2 with RAID 1

Is the installation of MySQL in CentOS with RAID1 the same as that of none? If not, what are the changes in the process of installation?
7
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1answer
677 views

Why did my zpool replace never finish and what should I do now?

I have a ZFS zpool with two disks in a mirror configuration, da0 and da1. da1 failed, and so I replaced it with da2 using zpool replace BearCow da1 da2 This ran for a few hours, during which zpool ...
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2answers
440 views

RAID1: Which disk will be mirrored?

How does a RAID1 system determine which disk to use as the source and which disk to use as the destination when mirroring? Assume for instance the following scenario: A RAID1 array is created with ...
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1answer
822 views

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. ...
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1answer
5k views

Dell Open Manage message in Windows Event Log, should I be worried?

I have a Dell T110 server with a SAS 6i/R controller and two hard disks in RAID 1. Ocasionally a warning appears in the Windows Event Log with the following message: SAS port report: SAS wide port ...
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1answer
211 views

Best practice for replacing failing drive in a TWO Domain Controller domain

Hi I have a two domain controller domain and i will refer to them as DC1 and DC2, here is some info on them. DC1 is or has all FMSO roles DC2 serves as another Domain Controller for replication DC1 ...
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1answer
120 views

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 ...
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1answer
403 views

install boot with raid 1 in 3 TB disks

I'm trying to install /boot in a RAID 1 using 3 TB disks. As the RAID partition do not let you manage partitions than more than 2 TB, CentOS automatically configures the partitions using GPT. My ...
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1answer
172 views

Storage setup on Ubuntu Server used for running virtual machines with software redundancy

I have a server I would like to use explicitly for running virtual machines under Ubuntu Server 12.04. It has plenty of RAM, 64GB and three large identical HDD´s. I would like redundancy through ...
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1answer
91 views

Linux Software RAID 1 issue

I recently had a HDD failure on a SW RAID1 system (Debian 6.0) and what happened was that the active HDD looked like it had some badblocks which somehow propagated to the HDD that was still OK but it ...
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1answer
138 views

grub2 failing to detect md0 for /

I recently set up a raid 1 array. Both / and /boot are on md0 (sda, sdb). everything was working when it was in degraded mode before I synced the two disks together. It was booting from grub2 on ...
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1answer
514 views

Ubuntu server boot degraded raid

I've installed Ubuntu 12.04.1 in a new server and set up the 4 hard drives with 3 RAID 1 devices, the configuration is such that the first two drives have md0 (swap space) and md1 (/) with the third ...
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2answers
345 views

Ubuntu 12.04 Server Software RAID1 - Faulty Spare - Smart Output Passed - Confused

I think I'm having an issue with one of the hard drives on my array and I'm just trying to troubleshoot what's happening. Its saying Faulty Spare and then after reboot it just says removed: ...
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1answer
1k views

mdadm and blkid give different uuid

We recently replaced a hard disk in a server and reinstalled the operating system (Centos 6) The raid rebuilds itself every boot; /dev/md2 is losing a disk each time apparently. Always the same ...
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1answer
1k views

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 ...
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1answer
365 views

Is there a way to prevent a SW RAID 1 from degrading?

I have a number of Debian servers in a datacenter and from time to time I notice that the software RAID 1 was degraded. While the re-sync process starts automatically and I don't lose any data I find ...
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7answers
785 views

Which RAID/LVM configuration for new 2x8TB file server is safest?

I just built a totally new PC to be a fileserver. It has one 60gb SSD for OS (ubuntu 12.04), and 8 2tb data drives in it. I am looking for the safest, most stable way to set up a single giant ...
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1answer
121 views

RAID1 disks on new windows 7 installation

I have a PC with Windows 7 on one disk A. Two other disks B and C are software (Windows 7 disk management) RAID1 mirrored. I want to reinstall Windows 7 on the first disk A. Will the new Windows 7 ...
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2answers
3k views

RAID 10 vs RAID 1 SSDs [closed]

I'm considering moving a large database from mechanical disks to SSDs. My initial instinct was to go for RAID 10, but further research suggests that this configuration can significantly reduce the ...
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1answer
756 views

IBM ServeRAID 8k level 1 critical

This is my setup: Lenovo ThinkServer RD140 IBM ServeRAID 8k controller Four Seagate Barracuda 1TB hard discs, organised in two RAID-1 arrays Now the third disk is defunct (orange light flashing). ...
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3answers
368 views

/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 ...
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1answer
602 views

Rebuild doesn't finish after raid1 disk replacement

In one of our servers one of the disk failed, no worries it happens all the time, we replaced the bad disk following the usual procedure but then ... 'the horror', after adding a new disk one of the ...
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3answers
277 views

File corruption when copying different file on raid 1

I have a RAID 1 configuration of 2 1TB drives on a Fedora 12 box. Most of what is stored there are video files that are numerical labeled. The problem I'm having is that I had one of the video files ...
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1answer
1k views

Can I move an entire software RAID1 array containing Linux to another machine?

I want to move an entire array of drives from old server hardware to new server hardware. There are 3 SATA drives with two partitions each; a small boot partition and a data partition. There are two ...
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210 views

Linux software Raid LVM restore volume group

first of all: excuse my bad english :) We use a Archlinux server with 3 HDD in software raid 1 mode. There should be two lvm extended partition from which i think they should be work in volume ...
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1answer
399 views

How to replace my Unix( SUSE Linux 10.1) raid drive

Im new to this server stuff and , i have a server with SUSE Linux 10.1 on it with Raid 1 hard drives , i want to replace one of the raid drives but don't really know if i remove the drive and attach ...
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2answers
197 views

sda1 (?) raid failed on debian - what to do now?

ispconfig says that my server has raid problems. The server is not mine, it is rented from a hosting company. The OS installation was not my business: the hosting firm did it. cat /proc/mdstat ...
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1answer
38k views

mount: unknown filesystem type 'linux_raid_member'

I have Suse Linux 12.1 and i am trying to mount a single RAID 1 disk, to explore the files in it. However when mounting it: # mount /dev/sdc1 /mnt/test mount: unknown filesystem type ...
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3answers
3k views

What would happen if I did a raid on a SSD and an HDD?

I am building another server (cheap) and would like to go with a 256GB SSD drive for my boot and data. This will be enough for my needs, but just having one SSD scares me for a couple of reasons. If ...
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1answer
76 views

Does the order of SAS drive matter when installing old drives?

I have an old IBM server with 12 hard drive bays, 4 of which are used (SAS 72GB drives), and configured in a RAID 1 array. The server will be sent away for repairs, when it comes back, do I need to ...
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1answer
345 views

Sync SSD to spindle drive using RAID or DRBD

I'm setting up a server with and SSD as the primary drive, and would like to duplicate the data onto a cheaper drive as a block-level backup (à la RAID1). Since I don't want to hobble the performance ...
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2answers
3k views

What's the difference between “mirror” and “raid1” in LVM?

On the lvconvert(8) man page it says: --type SegmentType Used to convert a logical volume to another segment type or to explicitly state the desired RAID1 segment type ("mirror" ...
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2answers
444 views

RAID 1 Failover

Given two disks in a (hardware) RAID 1 configuration, what exactly happens to a production system when one drive fails? Is there any noticeable service interruption, or will the system continue ...
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3answers
543 views

large RAID 10 vs small RAID1

The machine will store and serve millions of small files (<15Kb each), and all those files require a total storage space of 400G Considering the exact same SATA hard drives maker and models, on the ...
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1answer
888 views

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 ...
2
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1answer
140 views

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 ...
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0answers
945 views

mdadm raid1, [1/2] disks failed, safe to reboot?

I am seeing the following under /proc/mdstat Personalities : [raid1] md1 : active raid1 sda2[0](F) sdb2[1] 976554876 blocks super 1.1 [2/1] [_U] bitmap: 4/8 pages [16KB], 65536KB chunk md0 : active ...
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1answer
514 views

3ware Raid Migration 9650SE

I'm trying to migrate a single disk on a 9650SE 4LPML to a RAID 1. I'm trying to use 3dm2 to accomplish this, but the only options it will allow me to migrate to is either RAID 0 or RAID 10. I only ...
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2answers
187 views

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 ...
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1answer
161 views

Create a RAID1 Mirror After OS and apps have been installed

We are building a server but one of the new disks is dead on arrival. If we put the os and apps etc on the first disk, when we get the bad disk replaced can any one see any reason we shouldn't be able ...
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1answer
1k views

mdadm: hot remove failed for…

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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1answer
250 views

Delete RAID 1 from Debian

i've Debian installed RAID 1 2x 160GB HD, i want to delete it but i'm totally noob in linux, i don't want to install fresh image and start from scratch again, i cannot do backup because i've nearly ...
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3answers
848 views

Adding disk to RAID 1

I have a HP DL120 server running under co-location with a 2 disk RAID 1. Now i want to gain DB read speed by adding two more disks. My question is if the two disks automaticly will be included in the ...
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2answers
205 views

RAID1 with non-empty HDDs on a NAS

On one hand I have 2 HDDs with data, which are clones of one another I made using Cavalry Retriever duplicator. On another hand I have a brand new Patriot Javelin S4 NAS unit. I'm new to both RAID and ...
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2answers
606 views

RAID 10 or RAID 1 x 2 for Hyper-V with AD, EXCHANGE on Windows 2008 R2

We have 2 servers which have 6 SATA 7200 disks inside (each). We want to configure both servers so that they will have Window Server 2008 R2 Enterprise installed and on top of it Exchange 2010 x2 (for ...
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422 views

Installing VMware vsphere 5 on multi raid array server

We recently bought a new server that came with 2 600GB disks in a Raid 1 and 5 2TB disks in a raid 5. Initially this was going run Windows Server 2008 R2, however, it was decided to now run VMware ...
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486 views

3ware 9650SE-2LP “sync” after a drive failure

I have a 3ware 9650SE-2LP card that was set up to mirror two 1 TB disks (let's call them Disk A and Disk B). A couple of months or so ago the array stopped working (gave me an error at boot-up saying ...
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2answers
161 views

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 ...
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2answers
857 views

Forgot to create a second RAID for swap partitions in Software RAID 1. Will it work?

I have a Ubuntu 11.10 headless machine setup with Software RAID 1. It has two drives, each drive has a main boot partition (sda1 & sdb1) and a small swap partition. I created a raid for the boot ...