0
votes
1answer
99 views

Configuring RAID1 on HP Proliant Microserver N54L / Ubuntu 14.04.1 LTS [duplicate]

I've bought a N54L and fitted two 3GB drives. Keen to get set up with RAID1. BIOS: SATA controller mode set to "RAID" RAID Option ROM utility: both physical drives set up as one logical drive When ...
2
votes
2answers
113 views

Reassemble RAID 1 array from old system

I recently upgraded my OS from RHEL 5 to 6. To do so, I installed the new OS on new disks, and I want to mount the old disks. The old disks are listed as /dev/sdc and sdd in the new system, they were ...
1
vote
1answer
62 views

How to copy RAID 1 HDDs from one server to another Identical server

I have one IBM X3100M4, type 2582 windows server and having 2 x 500 GB HDDs in RAID Copy. Now brought new server and having blank HDDs. How can I copy RAID HDDs from Old server to new server? I have ...
0
votes
1answer
37 views

Use old raid drive as boot device without data loss

There were two disks in sw-raid. There were /dev/md1 as swap, /dev/md2 as boot and a /dev/md3 with ext4. The sw-raid was disabled by stopping and removing mdadm and then zeroing the superblock on ...
0
votes
2answers
57 views

Transfer from RAID-1 to RAID-0 — easy as cloning?

I have a RAID-1 of 1TB drives using on-board RAID. I have 2 new 240GB SSDs I want to place in RAID-0. This is Windows Server 2012. I know with disk cloning/transferring that it is important going ...
-1
votes
2answers
648 views

What is the performance implication of hardware vs software RAID in 2-disk RAID0/RAID1 setup?

I am choosing between two similar models of servers, one of which has software RAID, while the other hardware one. Servers in question are SYS-E32-1 and SYS-E32-3 from So you Start (an OVH brand) and ...
-4
votes
1answer
77 views

raid 1 always degraded after pushing reset [closed]

I have Marvell hardware raid 1. After pushing reset or any other incorrect shutdown raid is degraded. Is it possible to create hardware raid 1 on other chips(intel chipset for example) for example ...
1
vote
1answer
391 views

Various problems with software raid1 array built with Samsung 840 Pro SSDs

I am bringing to ServerFault a problem that is tormenting me for 6+ months. I have a CentOS 6 (64bit) server with an md software raid-1 array with 2 x Samsung 840 Pro SSDs (512GB). Problems: ...
2
votes
2answers
309 views

Remake SW RAID1 from a new HDD and an old HDD with bad blocks

I have a SW RAID1 and I just replaced /dev/sda with a new HDD as the old one failed. Now, upon trying to recreate the RAID array I discovered that the "good" HDD (/dev/sdb) has bad blocks with prevent ...
0
votes
1answer
142 views

Saving data on a failing software RAID 1 setup

My CentOS 6 server is running a software RAID 1 configuration with two 1 TB disks. Yesterday trouble started happening when the server was very irresponsive. I checked the logs and noticed a whole ...
7
votes
2answers
189 views

Linux software raid fails to include one device for one RAID1 array

One of my four Linux software raid arrays drops one of its two devices when I reboot my system. The other three arrays work fine. I am running RAID1 on kernel version 2.6.32-5-amd64. Every time I ...
1
vote
1answer
120 views

RAID1: Can I do 'write-mostly' in hardware (LSI type cards) so Drive A: 100% READ and WRITE and Drive B: ONLY WRITE?

The Google hammer has failed me, so I turn to this august body for help :-) I'm interested in doing SSD/HDD RAID1 pairs using the principle of 'write-mostly' as available in Linux's software RAID ...
0
votes
2answers
648 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 ...
5
votes
2answers
366 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
86 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 ...
2
votes
1answer
216 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) ...
3
votes
2answers
372 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 ...
3
votes
2answers
575 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
2answers
399 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
89 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 ...
1
vote
0answers
119 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 ...
0
votes
1answer
453 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 ...
1
vote
2answers
314 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: ...
1
vote
1answer
695 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 ...
1
vote
1answer
306 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 ...
2
votes
1answer
712 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 ...
2
votes
3answers
1k 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 ...
0
votes
2answers
697 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 ...
0
votes
1answer
135 views

RAID 1 with motherboard software or SiI hardware?

I have to setup 2 servers with RAID 1 and the company cannot provide funds for the hardware needed until december, here is the hardware available: Computer A OS: CentOS 6.0 MB: EP41-UD3L RAM: 4GB ...
0
votes
2answers
673 views

How to remove swap partitions from RAID 1 Array on Ubuntu?

Can anyone point in the right direction on how to remove SWAP out of a RAID1 configuration on Ubuntu 10.04 server? According to the Ubuntu Advanced installation guide, here, it said to add swap to the ...
0
votes
1answer
2k views

SCSI error: return code = 0x08000002, sense key: Aborted Command

The kernel logs: ata2.00: exception Emask 0x0 SAct 0x7fffffff SErr 0x0 action 0x0 ata2.00: irq_stat 0x40000008 ata2.00: cmd 61/08:f0:6f:5b:97/00:00:00:00:00/40 tag 30 ncq 4096 out res ...
2
votes
1answer
513 views

Hot swap failed software RAID drive with Windows Server 2008

Does Win2k8 natively handle hot-swapping of a hard drive? I have an existing server with 2 hard drives in it that are currently setup in a hardware RAID-1 configuration; they are each hot-swappable. ...
3
votes
3answers
954 views

RAID1 performance with madam

I am looking into performance issues we are having. We currently have a 4 drive RAID5 (3+1 fail over) and read performance sucks. Looking at RAID1 with 2 drives (maybe more, any benefit?) but from ...
0
votes
1answer
251 views

How to increase size of Raid 1 Allocation?

We had Raid 1 setup with two 1tb drives. I have swapped out the drives and now it was on two 2tb drives, however, the raid array is still only 1 tb in size. Is there a way to increase the size of ...
3
votes
1answer
513 views

Can you use drives while Raid 1 is rebuilding?

I am going to be rebuilding a raid 1 array. While the rebuild is happening can people still read/write to data in the array?
0
votes
1answer
387 views

Raid 1 Mirror - weird data loss for 1 month

I have been running windows software RAID 1 (mirror) on Windows 2008 R2 for a while and recently I experienced something very odd, hope someone can help explaining and share your view. Yesterday (Mar ...
1
vote
1answer
213 views

Linux RAID1, with reads restricted to one disk

I'm looking for a way to replicate a all changes on a filesystem between two disks in a master->slave setup. One of the disks is much faster for reads, so I would like to direct all reads to this ...
6
votes
2answers
1k views

How to make a Linux software RAID1 detect disc corruption?

This is one of the nightmare days: A virtualized server running on a Linux SW-RAID1 runs a VM that exhibits random segfaults in seemingly random codechunks. While debugging I find that a file gives ...
1
vote
2answers
255 views

Opened raid1 in raid0, what now?

I accidentally opened my 1 disk raid1 as raid0 with mdadm --create, and this looks like it overwrote the default raid meta info, and makes my device detected as raid0 with mdadm --assemble --scan. For ...
2
votes
4answers
480 views

how to know that RAID 1 is installed?

recently we have a server crash, so we decided to mount a RAID 1 in our server. so we asked to the hosting, they told us that was needed to reinstall all the system again. so we make it, and now i ...
6
votes
1answer
6k views

Boot from software RAID 1 on Windows Server 2008 R2

I have a Windows Server 2008 R2 x64 system with a single hard drive, and I have a spare hard drive of same size/model that's not being used. I was thinking about dropping in the new drive and setting ...
1
vote
1answer
2k views

How can I set up a RAID 1 without losing my Windows install?

I know this sounds like a SuperUser question, but I would rather ask here first. The drives are identical Seagate SATA2 drives. They are 250GB each. Windows XP Pro SP3 is installed on one drive, and ...
2
votes
3answers
2k views

Any disadvantages of using built-in software-RAID-1 on a Windows Server?

I have had some problems using hardware-RAID on a server. Now I'm planning to use the Windows Server built-in software-RAID-1 instead. The server will only be used for Business Administrations, so I ...
8
votes
2answers
826 views

How to attach an existing RAID1 to a fresh Linux system?

I have a RAID1 currently operating on a single hard drive (yes, the mirror is absent). Is it possible to reorganize my system using the following algorithm? I set up another single-disk RAID1 (onto ...
1
vote
2answers
3k views

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 ...
0
votes
2answers
1k views

Rebuilding RAID1 in Ubuntu

I had my second HD in my RAID1 come up with bad sectors. So I got another drive and pulled out the bad sector drive and put the new drive in. With the original working RAID1 drive in the computer it ...
1
vote
3answers
662 views

Mixing RAID0 and RAID1 on the same set of drives

I am soon installing a new pair of drives in one of our machines that exists as a VMWare host box (running VMWare Server at the moment). They are going to be used as a RAID0 array for a couple of ...
12
votes
11answers
2k views

Is RAID5 more robust than RAID1

I am about to replace an old hardware RAID5 array with a Linux software RAID1 array. I was talking to a friend and he claimed that RAID5 was more robust than RAID1. His claim was that with RAID5, on ...