Software RAID is implemented in the OS. It uses CPU to handle the RAID setup. It is cheaper than hardware raid. It often doesn't support features which you can find with hardware raid like: hot spare fast rebuilding of an array hot swapping high write throughput Another problem is that it uses ...
3
votes
1answer
40 views
Linux mdadm software RAID 6 - does it support bit corruption recovery?
Wikipedia says "RAID 2 is the only standard RAID level, other than some implementations of RAID 6, which can automatically recover accurate data from single-bit corruption in data."
Does anyone know ...
1
vote
0answers
40 views
RAID 1 on 2 external HDDs [migrated]
I have an Ubuntu 12.04 server based on my old laptop. It's HDD (160 GB) is too small for the file storage I need, so I'd like to attach a couple of external HDDs to it (through USB ports). The data ...
-1
votes
4answers
120 views
RAID0 vs Separate Disks for Heavy Read Perfomance
I was wondering if there will be any noticeable difference in read and write performance (99% read, 1% write) between the 2 approaches. The server would be pushing 1-3Gbit.
The stripe size is 2MB ...
0
votes
1answer
48 views
Move OS from Software RAID (PERC S300) to Hardware RAID (PERC H700/H800)
A client of ours has a server running Windows that is installed on a PERC S300 software RAID.
We want to upgrade this to a larger capacity, so we are also upgrading to a hardware RAID card (PERC ...
0
votes
1answer
79 views
Which HDD I can replace WDC WD20EARS with in the software RAID?
I have one customer's server with WDC WD20EARS drivers in a software RAID. These disks are of advanced format (4Kb sectors, not 512 bytes). They are configured as follows:
Configuration:
...
0
votes
0answers
43 views
Best way to change disks with Intel Rapid Storage Technology 10.8.0.1068; only one disk in current array
I have a raid 1 array which is currently missing one disk. I want to change the system over to two completely new disks. I currently have Intel Rapid Storage Technology 10.8.0.1068 installed. What is ...
1
vote
0answers
105 views
8 hard drives, very same model, software RAID0, terrible performance [migrated]
I have 8 hard drives in my PC, assigned as storage.
Three of them are attached to the mainboard.
Four of them are attached to a controller [ SiL 3114 ]
One of them attached to an another ...
1
vote
1answer
50 views
Upgrading Intel Matrix Storage Manager to Intel Rapid Storage Technology, windows 2003
I would like to upgrade the Intel Matrix Storage Manager software on a windows 2003 std box to the latest version of Intel Rapid Storage Technology which my mobo (ASUS P6X58D-E) supports.
Can someone ...
0
votes
1answer
76 views
Intel Matrix Storage Manager RAID rebuild cycles over and over
I am working on a machine that has Intel Matrix Storage Manager on it. It says it needs to rebuild the RAID1 array, but it seems to get to about 35% and then starts the rebuild over again at 0%. ...
1
vote
1answer
50 views
why does windows 2008 resync software RAID after a power outage?
i had a power outage. before the outage my RAID 5 (4 SATA drives) was fully synced. perhaps I was doing some trivial writes during the poweroutage, but afterwards windows decided it has to do a ...
1
vote
3answers
131 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 ...
2
votes
3answers
109 views
Can I convert a raid10 array to raid0?
I have created a raid10 array using mdadm. Metadata version is 1.2. I want to convert this to a raid0 array, is it possible?
P.S. I am having terabytes of data, I want to avoid copying the data over.
...
3
votes
1answer
33 views
What is the meaning of the 'Personalities' feature under /proc/mdstat
On some systems I see this :
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty]
md1 : active raid1 sdb1[1] sda1[0]
10485696 blocks [2/2] [UU]
md2 : ...
0
votes
1answer
70 views
Raid 1 / Raid 10 - Disk Failure
I have setup Software Raid 1 and Raid 10 using VirtualBox for testing purpose.
The partition and raid setup look like this:
When I deliberately remove Disk2 and restart a server, it booted to OS ...
5
votes
1answer
116 views
Raid 1/10: Kernel panic- not sysncing: attempted to kill innit
I have setup Raid 1 & Raid 10 in Virtual Box for learning purpose.
The following Partitions for 4 Hard Drives:
I make a 100mb partition (/boot) on four drives and make that a raid 1 partition.
...
4
votes
2answers
145 views
Software Raid 10 on VirtualBox?
I want to learn how to use Software Raid 10, is it possible to use VirtualBox by adding four storage images?
This is my plan:
4x 100mb partitions (1 on each drive) configured as a raid 1 for ...
2
votes
0answers
118 views
MD Raid can't be assembled
I was running a Raid5 with 3 disks at on my homeserver. But had some problems with the back-plane for the disks. The disks weren't detected reliable. So I replaced the back plane and the disks are now ...
1
vote
2answers
155 views
Cant boot newly created mdadm software raid in Debian linux squeeze
Hello I have very strange problem creating swraid on Debian Squeeze Linux. I started creating RAID1 from existing standard instalation of Debian on single drive.
So I bought new drive and started ...
4
votes
1answer
74 views
does the *physical* order/location of drives in a mdadm-managed RAID-10 array matter?
i've setup a 4-drive RAID-10 array using mdadm-managed, software-raid on an x86_64 box.
it'd up & running and works as expected,
cat /proc/mdstat
md127 : active raid10 sdc2[2] sdd2[3] ...
1
vote
2answers
257 views
How to setup fake raid for vmware virtual machines?
I have a vmware esxi 5 running on a server with ssd and two hard drives. The server comes with software lsi megaraid and intel rapid storage raid. Neither of them work with esxi.
I need to somehow ...
0
votes
0answers
47 views
Is there a way to get 3TB drives to work with Perc 6/i? [closed]
Possible Duplicate:
Dell Perc 6/i and 3TB drives?
I see they're not officially supported: Dell Perc 6/i and 3TB drives?
(Unless something has changed.)
I'm wondering if there's a way to ...
1
vote
1answer
80 views
Convert to dynamic disk / option disabled
I'm trying to setup a software RAID-1 at a new hosted server. It has two 3TB disks in and I've installed a fresh copy of Windows Server 2008 R2 Web Edition with SP1 on one of those disks.
A ...
0
votes
1answer
124 views
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] ...
0
votes
4answers
140 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 ...
0
votes
1answer
43 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
votes
1answer
37 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
votes
0answers
200 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 ...
1
vote
0answers
77 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 ...
0
votes
0answers
94 views
Installing LILO to software-RAID1 with failed item
Item /dev/sda1 of software RAID1 /dev/md0 has gone to a better world. md0 is mounted to a root / directory, and it contains /boot directory.
My lilo.conf configure is
boot=/dev/md0
root=/dev/md0
...
0
votes
1answer
184 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 ...
1
vote
1answer
441 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 ...
0
votes
2answers
102 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 ...
0
votes
2answers
232 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 ...
-1
votes
1answer
27 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 ...
5
votes
2answers
245 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 ...
0
votes
2answers
76 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
vote
1answer
67 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 ...
0
votes
2answers
374 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
votes
2answers
137 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
votes
1answer
63 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 ...
4
votes
1answer
97 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 ...
1
vote
1answer
442 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
votes
1answer
95 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 ...
-1
votes
1answer
76 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 ...
0
votes
2answers
145 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
56 views
Debian MD software nested RAID0+1 autoassemble issues [closed]
I'm starting out with software RAID on Linux and hit a roadblock when using a nested RAID schema. I have three small disks that I'm RAID0ing, and then RAID1ing with a partition on another larger HDD. ...
2
votes
1answer
79 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
votes
1answer
66 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
votes
2answers
73 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 ...
0
votes
1answer
127 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 ...
