Server Fault Stack Exchange
Server Fault Stack Exchange

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.

Related Tags:

507 questions
0
votes
2 answers

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 only some grub files, total size it arround 100mb.…
ProDraz
  • 231
  • 1
  • 4
  • 10
0
votes
0 answers

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 named "FTS D3049" and is currently running RAID0…
Mortenrb
  • 1
0
votes
1 answer

"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 my ubuntu 12.10 (kernel…
osgx
  • 603
  • 12
  • 26
0
votes
2 answers

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 both mirrors on one device. Situation: 2 x 50GB…
Tomasz Olszewski
  • 898
  • 1
  • 9
  • 20
0
votes
1 answer

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 provide a rescue shell and I can log on there OK…
terry1738
  • 1
  • 1
0
votes
1 answer

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 dont want. so i wonder how i can archive my goal of…
thedanielhanke
  • 119
  • 1
  • 5
0
votes
1 answer

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, not Dell-certified. When I swap the failed drive…
markbratanov
  • 111
  • 4
0
votes
2 answers

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 writes, reads, bytes, and latency in individual…
sqlbuzz
  • 23
  • 4
0
votes
1 answer

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 start resynching, will the volume be available to use or system…
ADOConnection
  • 136
  • 8
0
votes
2 answers

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 if something goes wrong. DOH! I have Ubuntu 9.10…
user149041
  • 1
0
votes
2 answers

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 running. Format is not an option! I am trying to…
George Pligoropoulos
  • 235
  • 1
  • 3
  • 8
0
votes
2 answers

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 complaining about the new disc: # megaclisas-status --…
cdecker
  • 411
  • 2
  • 5
  • 18
0
votes
2 answers

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 then, but what I am not clear on is how in the…
jfreak53
  • 163
  • 1
  • 4
  • 27
0
votes
1 answer

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. Both used to be part of an mdadm level 1 RAID using…
Adrian Heine
  • 328
  • 4
  • 22
0
votes
2 answers

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 | InProgress c0u0 | RAID1 | 465G | Degraded | None --…
cdecker
  • 411
  • 2
  • 5
  • 18
1 2 3
…
33 34