RAID1 or mirrored RAID uses two disk that have the same data.
0
votes
2answers
36 views
How to mount parition in from a working driver in RAID1
One of hard drives in array is dead, I'm unsure if it's raid0 or raid1, what I'm trying to achieve is mount the working drive and make a backup of what's left.
If I mount /dev/md127 then I can see ...
0
votes
0answers
31 views
Reconfigure from Raid0 to Raid1, is it possible?
currently I have Fujitsu tx140 s1p servers, one Tower and one Rack.
They are both running with the same hardware, configures the same way, so I'll just ask one Q for both.
They have an motherboard ...
-4
votes
0answers
26 views
How to hot mirror laptop disk onto external usb drive using kernel raid capabilities? [closed]
Please help me materialize my dreamed backup solution.
On my Debian (testing) laptop I'd like to be able to plug in my external USB drive (of identical size as my internal drive) and the system to ...
2
votes
0answers
37 views
mdadm raid1, drive failure lost 14days worth of data?
I am rather confused. One evening I had a server which had died. I went to reboot it and noticed it was stuck on the "GRUB" boot screen. I then noticed a hard drive had failed. I put a new hard drive ...
0
votes
1answer
26 views
“LV Status NOT available” after converting root from lvm2 to lvm2+raid1 (lvconvert --type raid1)
I just converted by lvm2 root filesystem from linear lvm2 (single HDD:sda) to lvm2 raid1 (using lvconvert -m1 --type raid1 /dev/ubuntu/root /dev/sdb5 command). But after this conversion I can't boot ...
2
votes
1answer
47 views
Replacement raid1 drive is one block smaller. What to do?
Apparently once should always leave a bit of empty space at the end of each raid1 partition.
But if we're too late for that, what can be done if a replacement RAID1 drive is slightly smaller than the ...
-1
votes
3answers
95 views
Raid 0, Raid 1, Raid 5, Raid6, Raid 10 Read/Write performance? [duplicate]
Assume a single disk has a baseline of 1W & 1R performance, how does the different RAID configurations behave?
My initial guess:
Raid 0: 2W 2R
Raid 1: 1W 2R
Raid 5: ? ?
Raid 6: ? ?
Raid 10: ...
0
votes
1answer
49 views
LVM mirror with data and logs mirrored on same 2 devices
I'm trying to set LVM mirroring with only 2 devices. It works perfecly when I add third device for mirrorlog, or use corelog. But with only 2 devices and --alloc anywhere LVM nearly always creates ...
0
votes
0answers
14 views
How to rebuild a RAID1 array with Intel Matrix Controller & Corrupt Windows OS?
After setting the Intel Storage Matrix ROM to a Rebuild state after RAID1 failure, how do I rebuild a RAID1 Array when the Windows will not complete a boot in order to access the Intel Matrix Storage ...
1
vote
1answer
50 views
Rebuilding Raid-arrays
How I can rebuild raid arrays?
I am using Raid 1.
My datacentar says it needs to be fixed, first i thought it is HDDs faulty because of smartmoontools scanning result but it is not.
command:
cat ...
1
vote
1answer
109 views
Converting BTRFS filesystem to RAID1 fails with “Inappropriate ioctl for device”
I had a ~1.6TB BTRFS volume on a single partition, to which successfully I added another freshly created and formatted partition (on another device) of exact same size with the intent of mirroring ...
5
votes
2answers
122 views
mdadm: Which disk is being rebuilt?
I noticed my software RAID1 degraded, and wanted to figure out which of the two disks in the array is being rebuilt/re-synced since they both show as being up. I am hoping someone can shed some light ...
0
votes
1answer
38 views
raid 1 need to move folder in rescue shell
Good day All.
I have a remote server running raid 1 which I connect to using ssh keys.
I accidentally moved the /root/.ssh folder and need to put it back so I can log on again.
The people I rent off ...
0
votes
1answer
58 views
removing software raid without data loss
i wonder if/how i can stop my linux machine using the installed software raid, without loosing any data.
All information i found was about removing the superblock of any hdd, and this is o/c what i ...
-1
votes
2answers
52 views
manually editing shadow file on disk from raid1 array
At work we have a machine to which root password has been lost. I have pulled out the disk and mounted it to another computer. Now I think the next step should be editing root password in the shadow ...
0
votes
0answers
116 views
“stripe size” for RAID 1
I have an HP RAID controller with a nice big flash cache with which I'm setting up a simple RAID 1 array on two disks. I can configure the strip size (shown equal to full stripe size) of this RAID 1 ...
4
votes
2answers
199 views
mdadm raid 1 grub only on sda
I just finished setting up a CentOS 6.3 64bit server with mdadm however a lightbulb went on and I realised grub would only be installed on the first drive which is about as much use and an ashtray on ...
1
vote
2answers
127 views
DegradedArray event on /dev/md1
This morning I got this message:
This is an automatically generated mail message from mdadm
running on
A DegradedArray event had been detected on md device /dev/md1.
Faithfully yours, etc.
P.S. ...
1
vote
5answers
114 views
Using RAID1 to assist in offsite backups
I'm trying to set up an offsite, offline backup procedure for my company's critical information. We already have an in-office redundancy backup set up using RSYNC that backs everything up onto two ...
0
votes
1answer
193 views
New HDD swap in SAS 6 ir shows it is missing?
SETUP: Dell Poweredge T410 with Windows Server 2003, SAS 6 IR Raid-1.
Both the original drives were Dell Certified Seagate Barracudas for enterprise, 250gb.
The new HDD is a Seagate Barracuda 500gb, ...
0
votes
2answers
94 views
Raid 1 and Latency
I am aware that RAID comes with certain write penalties, etc and that varies at different levels. I am trying to figure out how latency is affected in RAID 1. From my SAN, I can look at the number of ...
0
votes
1answer
53 views
Will Windows Server 2008 R2 software RAID volume with “Failed Redundancy” be available during resynching?
In addition to this question: Windows Server software RAID volume constant "Failed Redundancy"
I have this problem on my production server too, but im concerned about resynching.
If I ...
0
votes
0answers
88 views
Intel ICH10R data recovery after re-adding old RAID 1 drives [closed]
I have two SAMSUNG HD502HJ hard drives which were originally running on a system (system A) with an onboard Intel ICH10R SATA controller in RAID 1 under Windows 7.
The drives were then removed from ...
0
votes
1answer
228 views
SBS 2003 boot stalls at acpitabl.dat
I have a SBS 2003 server running for 3 year without any problems, and few days ago it freezes during the boot.
System is using two 500 Gb drives in RAID1 (Intel Matrix 7.5)
After trying to load in ...
2
votes
1answer
456 views
How do you set up RAID1 with both disks bootable on Debian/Ubuntu?
In Debian 6, new installation, what is the recommended way of setting up a software RAID1 array so that the system is bootable from both disks?
I have heard that people that don't know what they are ...
2
votes
2answers
93 views
Copy entire filesystem in a folder where a raid-1 array is mounted
I am trying to migrate from a single disk drive system to a double disk drive software raid-1 system that already has a running system on it. Meaning that formatting and having a new installation of ...
0
votes
1answer
294 views
How to setup grub for raid-1 on already setup 12.04?
Final objective: Two disks, one old, one new. Need to setup raid-1 without re-installing ubuntu. System is Ubuntu 12.04. Note that I am trying everything in a virtual machine (virtualbox)
What I have ...
1
vote
0answers
118 views
Raid1 disk degraded after reboot
I'm testing a Rackspace cloud server and have two Cloud Block Storage volumes set up in a Raid1 configuration.
There are no system files on these volumes, they're purely for storage. Everything ...
0
votes
2answers
47 views
Ubuntu 9.10 won't reboot after replacing a failed drive
Hello Serverfault community.
I hope someone can shed light on a peculiar problem I am having with an Ubuntu 9.10 server install. I am not a Linux expert but have the responsibility of fixing the box ...
0
votes
2answers
196 views
Device cannot be added on software-raid-1 array on Ubuntu 12.04
Unfortunately all tutorials I have found online until now on how to setup software-raid-1 are outdated on ubuntu 12.40
My target is to setup it on a system with a secondary disk drive that is already ...
2
votes
1answer
201 views
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 ...
3
votes
2answers
118 views
RAID1: One RAID per Partition or Partitions on RAID device?
What is better suited for a normal Server:
several partitions, which are bundled as several RAID1 devices (/dev/md0, /dev/md1, ...) without any partitions, which are not mirrored.
one big /dev/md0, ...
0
votes
2answers
72 views
New harddisc in RAID fails after only a few days
Last weekend I had to replace one harddisc in a RAID 1 on a PERC/5i controller because it reported it as failed.
After replacing the disc it worked for 5 days and then the controller started ...
0
votes
1answer
153 views
Is it reasonable to make a RAID-1 array with a ram disk and a physical disk to maximize read performance and protect data?
In one of the answers on SO (I forgot which one) I've seen a suggestion to make a RAID-1 array composed of a RAM disk and a physical partition. By adding the physical partition with --write-mostly and ...
0
votes
2answers
136 views
RAID 1 after install and two controllers
I have question regarding RAID 1. Can I setup software RAID 1 after having installed the first drive and setup ubuntu 12? I know that during server install and partitioning I can select RAID and setup ...
0
votes
1answer
169 views
Restoring data from a failed and possibly partly overwritten mdadm raid1
I have a failing hard disk (let's call it sda) which contains, among other things, a 1.5 TB partition (let's call it sda3). There is another disk (sdb), which has a 1.5 TB partition (sdb1) as well. ...
0
votes
2answers
78 views
Replace RAID1 Disc - things to consider
One of my RAID controllers is complaining about a harddrive failure:
-- Controller informations --
-- ID | Model
c0 | PERC 5/i Adapter
-- Arrays informations --
-- ID | Type | Size | Status | ...
2
votes
1answer
99 views
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)
...
0
votes
1answer
238 views
Configure raid for IBM x3200 M2
I have a x3200 server and I have planing to use raid 1 for mirroring Sata Hardisk .
I am searching on google to find raid server manager for x3200 , but no luck .
Is there another way to configure ...
0
votes
2answers
124 views
Ubuntu Server - RAID1: Operating System not found
I'm trying a RAID1 on Ubuntu Server 12.04 in virtual machine and I followed the post:
RAID1: How do I "Fail" a drive that's marked as "removed"?
I added two disks and created ...
0
votes
0answers
43 views
Does RAID negatively affect non-RAID devices? [closed]
I am running Windows 8 on an SSD, and it's all running swimmingly, but I want to store documents on two HHDs (not SDDs) running under RAID 1.
My motherboard has two SATA controllers, both set to ...
3
votes
2answers
196 views
From which plex am I booted from on raid?
I have a server with mirrored boot volume. It is software raid 1 in Windows Server 2008 R2. I do not have physical access to the server.
I am looking for a way to check which disk is a boot drive. I ...
2
votes
2answers
227 views
Linux Software RAID1 Rebuild Completes, but after reboot, its degraded again
I have been beating my head with an issue here, and I'm now turning to the internet for help.
I have a system running Mandrake Linux, with the following configuration:
/dev/hda - This is a IDE ...
0
votes
0answers
57 views
Copy Logical Volume data to RAID 1 in CentOS 6.2
I have an existing CentOS 6.2 system with drives having this partition:
sda
--sda1 - ext4 - /boot
--sda2 - physical volume
Logical Volume
--VolGroup
-----lv_root
-----lv_home
-----lv_swap
sdb ...
0
votes
0answers
34 views
Logical Volume in RAID 1
I have an existing CentOS 6.2 system with drives having this partition:
sda
--sda1 - ext4 - /boot
--sda2 - physical volume
Logical Volume
--VolGroup
-----lv_root
-----lv_home
-----lv_swap
sdb -free
...
4
votes
2answers
262 views
NAS device claims drive in a RAID is degraded but S.M.A.R.T. says it is fine
I have a Synology DS213 with two 600GB drives in RAID 1.
Last night the device reported that my second drive had become degraded and that I should replace it. When I ran a extensive S.M.A.R.T. test ...
0
votes
0answers
29 views
Ubuntu 10.04 LTS hangs at 43% of preparing to partition raided drives
I have set up hardware raid 1 with two SAS drives using the Adptec 6405E controller. I am having a problem when installing Ubuntu 10.04 LTS as it hangs at 43 % when partitioning disk drives. So far ...
0
votes
2answers
218 views
How to Detect Hard Disk Failure
I have a software RAID 1 setup in my CentOS 6.2 and set to be bootable in any of the HDDs in case one of them fails.
Questions:
How can I recognize if one of the HDDs fail? or early signs of ...
0
votes
1answer
109 views
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 ...
-1
votes
1answer
66 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?
