RAID solution handled by the operating system.

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Server Config Software Raid Slow Read

I have 6x WD Caviar Black 1,5 TB in Software RAID 10 / 1 / 0 (Centos 6.2 / mdadm) cat /proc/mdstat Personalities : [raid10] [raid0] [raid1] md0 : active raid1 sdf2[5] sda2[0] sdb2[1] sdd2[3] sdc2[2] ...
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4answers
312 views

Software RAID setup questions [closed]

I would like to set up a server at home that will have several roles, but the primary and most critical role would be a file server. It will host family photos and videos among other things that I do ...
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1answer
137 views

Install sw RAID 1 on production server from single disk?

Is it possible to install software RAID 1 on a single disk Debian server without erasing/format the data on the original disk? What approach would you recommend?
0
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1answer
92 views

Hard drive performance in small-sized server+RAID 5 [closed]

Disclaimer: I'm an undergraduate intern and this is my first server build I've been asked to build a small server for our team around the office. We are trying to maximize space (our motherboard has ...
2
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0answers
421 views

How do I create a RAID10 array using EBS on Amazon?

Basing this question on information I got in Why does df shows only half the size of a RAID10 array?, how should I create a RAID10 array using EBS volumes on Amazon, in a way that will not be ...
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0answers
249 views

After upgrade to SLES11 SP1 - LVM on top of software RAID5 not working anymore

On a system where I have been running OpenSuSE11.1 for some time I performed a fresh installation of SLES11 SP1. The system used a software RAID5 system on top of which an LVM was setup with a single ...
2
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2answers
1k views

Software Implementation of RAID 10 on a Windows Server 2008 running on Amazon EC2

Does anyone know of a software implementation of RAID 10 that will work on a Windows Server 2008? Specifically I'd like to use it on a virtual instance running on Amazon's EC2, connected to EBS ...
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3answers
3k views

Creating RAID1 on Windows Server causes not enough disk space error

I have three disks. Disk0 (boot), Disk1 and Disk2. Disk 1 and 2 are both unformatted and unallocated drives. I am trying to mirror Disk0 to Disk1. They are both Dynamic and are both the same size ...
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2answers
434 views

recovering data from raid1 component disk

Need to recover data from raid1 component disk using ubuntu live usb disk. The existing software raid was broken. After many attempts, I removed degraded raid setup from BIOS but ubuntu live could not ...
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2answers
643 views

How reliable is CentOS 5.x RAID 1? I'm considering the SuperMicro MicroCloud product which has everything i need except for hardware RAID

The SuperMicro 3U blade server looks very promising - MicroCloud! If i configure RAID 1 on the 2 SATA drives in each of the blades, how would that work out in terms of reliability? Compared to 8 1U ...
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1answer
72 views

IRP/DRP for CentOS software RAID

We're finally trying to start doing things right by getting proper servers. We've got a HP server (With B110i but it's not being used as RAID controller) and it's running a CentOS 5 derivative with a ...
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2answers
2k views

Convert linux software raid from raid5 to raid6

I currently have a file server with 3 1.5TB disks in a RAID5 array. Since it's pretty much full, I got three additional disks (also 1.5TB each). Now I'd like to switch to RAID6 since 6TB space is ...
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2answers
144 views

Shrink windows server 2008 software raid

I have a windows server 2008 with 5*2TB disks in a windows server software raid 5. I want to shrink the volume down to 3 disks and use the other two disks elsewhere but can't find a guide on how to ...
1
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1answer
177 views

“hot swapping” linux md raid1 - does re-mounting file-system temporarily read-only enable safe disconnection?

There's is an ext3 filesystem on top of Linux md raid1, array consists of two hard drives. Various services, including databases run on and write to it. Let's say for argument's sake that to minimize ...
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3answers
1k views

Creating a partitioned raid1 array for booting a debian squeeze system

I'd like to have the following raid1 (mirror) setup: /dev/md0 consists of /dev/sda and /dev/sdb I created this raid1 device using mdadm --create --verbose /dev/md0 --auto=yes --level=1 ...
2
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2answers
335 views

Does Windows Server 2008 software RAID-5 protect against bad clusters?

I have tested rebuilding a Windows Server 2008 RAID-5 after a whole disk fails, and this works pretty well. It's a bit harder to test a few clusters going bad. Will Windows detect this, correct for ...
2
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1answer
222 views

Reboot during software RAID1 rebuild?

I have two disks in a software RAID1 in OSX 1.6 One of them failed, and I'm rebuilding it now but it is taking 10 hours to do... I was wondering if it's safe to shut down and continue this at ...
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1answer
169 views

Recovering linux software RAID array without removing it's items

I have linux software raid (RAID10), md2 : active raid10 sda6[4](F) sdd5[3] sdc5[2] sdb6[1] 390620160 blocks 64K chunks 2 near-copies [4/3] [_UUU] which has degraded state. Can i start recovery ...
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1answer
2k views

Ubuntu EC2 Raid0 Ephemeral — SSH connection after reboot

First, I launch a fresh large instance using the Elestic AMI ami-c162a9a8. Initially, I run: df -h /dev/xvda1 9.9G 814M 8.6G 9% / udev 3.7G 4.0K 3.7G 1% /dev ...
0
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1answer
149 views

Software Raid 5 in Enclosure - Server Crash - Hope?

I'm a software guy. I have inherited a Windows 2008 server that had a 4 disk raid enclosure (one of those Rosewill ones from NewEgg I think) connected to it via eSata. The Windows server was ...
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1answer
421 views

Filesystem encryption settings during install?

I'm installing CentOS 6.1 on a server and exploring the encryption settings in combination with software RAID. Should I encrypt the drive partition, the software RAID device, or both? Should I ...
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2answers
596 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 ...
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1answer
355 views

Does my server have software RAID 1 set up?

I recently got my dedicated server it has 2x 1TB HDD's, so I asked for software RAID 1 on set-up and my provider asured that server have RAID 1 (software). I tought that if I will run RAID 1, I will ...
0
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1answer
94 views

Bandwidth efficient software RAID [closed]

I have this crazy idea .. that might just work if I find my missing piece Take network with 40 windows workstations (on 24 hours) Each machine uses 20 GB out of 500 GB capacity Install free copy of ...
2
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2answers
201 views

UnRaid software raid - CentOs

I have a linux ( CentOS ) server that has 2 hard drives, and it configure by software raid1, Now I need to un-raid hard drives, and use both of them. How can I Un-raid them ? ( I just has SSH access ...
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3answers
509 views

SAN Distro with iSCSI and software RAID 5 [closed]

Im looking for an OS, to install on a server, which has 4x 1Tb disks. Id like to couple those disks as an RAID-5 array, and share it over iSCSI to VMWare ESXi 5. Im not sure if this exists... I have ...
0
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1answer
298 views

Redundancy on the Freenas install itself?

I'm wondering what kind of redundancy I can put in place for the Freenas install itself. If the drive that Freenas is installed on fails, does that mean all my raid volumes are gone since its all ...
0
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1answer
199 views

Allignment of ext3 partition on LVM RAID volume group

I'm trying to add a partition on a LVM that resides on a RAID6 volume group and fdisk is complaining about the partition not residing on a physical sector boundry. My question is, how do you ...
0
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1answer
184 views

mdadm scheduled check [closed]

I now have several devices that start the monthly mdadm scheduled check. I can let them all run monthly, stagger the checks, or disable them completely. I had the misfortune of several disks turning ...
0
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1answer
130 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 ...
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0answers
378 views

MySQL INSERT … SELECT renders server unresponsive

Solution: Although I haven't found a proper solution yet I'm at least sure that this is purely a disk I/O problem and has nothing to do with MySQL... I have a MySQL server (5.1.54-1ubuntu4-log) ...
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2answers
181 views

Grub install devices & Software RAID

Server has a software RAID 1 (sda+sdb) configured as /dev/md0 device. Later system upgrade was launched and grub updated. Now it promped to select grub unstall devices from the list to finish update: ...
0
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2answers
625 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
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4answers
318 views

What RAID Level Should Be Used

I am working on a server build project for work and have inherited the following items that I need to figure out the best way to handle and configure. 2 of these: I/O Crest SY-PEX40008 PCI-e SATA ...
0
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1answer
473 views

identifying and cloning the superblock of a raid0 mdadm v0.90 array

/dev/sdb13 174706938 976768064 401030563+ fd Linux raid autodetect The size of that partition is 802061126 sectors. From what i read - mdadm should have placed the actual superblock ...
2
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1answer
263 views

FreeBSD vinum striped (RAID0) volume - performance issues

I've experimented with different striped volumes in vinum under FreeBSD 8.2-release. I have current hardware (Intel i5 processor, adequate MB and 8GB RAM). My test-setup consists of 2 or 4 disks in a ...
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2answers
707 views

How do you know if your Windows Server 2008 R2 Software RAID has failed? [duplicate]

Possible Duplicate: How do you monitor the health of a mirrored disk in Windows? I have software RAID (RAID-1) enabled on 2 pairs of Drives on Windows Home Server 2008 R2. To test the ...
0
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2answers
789 views

md-RAID5 - How fast should it be or where is the bottleneck?

I set up a new server with a LUKS encrypted RAID5. On the former server, the bottleneck was definitely the CPU, as it was a 7y old single core and the load went up to 100%. Now it is different. I ...
3
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1answer
449 views

Software RAID1 ready to fail - How can I degrade manually?

I have a Centos 5.4 server in production with 2 drives in software RAID1. The last days /var/log/messages has a lot of messages, showing that one of the drives is ready to fail: Sep 23 00:48:38 ...
1
vote
1answer
434 views

Replacing a PERC S300

The PERC S300 card that came with our Dell PowerEdge T110 servers is Windows only (see here). As a result, we're looking for an alternative that works under Linux. We had planned to use software RAID ...
3
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2answers
1k views

e2fsck / resize2fs problems

I've got 6 drives (each 1.5T, all same model and firmware revision) that are part of a RAID5 array. The RAID5 makes a LVM volume group and a logical group. The latter contains only one ext3 partition. ...
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2answers
870 views

Can I configure a RAID 1 on the Dell Poweredge 860 with the onboard SATA Controller

Is there a way to set up a RAID 1 with two SATA HDD on a DELL Poweredge 860 that has no specific RAID Controller? I want to use the on board SATA controller to set up my RAID 1.
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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 ...
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2answers
1k views

Slow DL360 Smart Array P400i RAID

We recently acquired two "decked out" DL360's, complete with the Smart Array P400i RAID raid controller, 512MB BBWC, and (6) 10k SAS drives. They are configured in a RAID 1+0 set up, running LVM and ...
0
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1answer
886 views

spares missing on ubuntu mdadm software raid 5 how to disable?

I want to understand and if it makes sense, disable the alert message I receive about spares missing on my ubuntu linux software raid 5. I used mdadm and set up a /dev/md0 raid volume made up of 3 ...
2
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1answer
423 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. ...
2
votes
1answer
1k views

LVM-on-RAID vs RAID10 vs RAID6

In the spirit of the question LVM mirroring VS RAID1 I thought I'd push a bit further. Suppose I have 4 identical hard drives (e.g. 1TB) that I want in a RAID setup for a backup/media server. LVM ...
6
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1answer
1k views

Poor Linux software RAID 5 performance with NCQ

While salvaging a 2-disk failure in my 3-disk RAID 5 setup, I happened to notice reconstruction was faster with NCQ disabled (~90M/sec) than with the NCQ enabled (~50M/sec). Running bonnie++ to ...
3
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1answer
571 views

Configure Windows RAID-5 “drive failed” timeout?

When a hard-drive controller detects an error, and needs to remap a sector, the drive normally becomes unresponsive for the seconds (or possibly minutes) it takes to try to complete the re-mapping. ...
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1answer
244 views

Missing RAID 6 array + LVM volume after hard reboot

After a restart which stalled, I did a hard reboot and now mdadm can't see the RAID 6 array anymore, LVM can't find the volume which was on that raid array. I have looked into /etc/mdadm/mdadm.conf, ...