RAID 10 is a combination of RAID 1 and RAID 0. RAID 10 can also be referred as RAID 1+0

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Poor SQL performance on HP ProLiant ML310e Gen8 v2 with raid10

I recently bought HP ProLiant ML310e Gen8 v2 server with 8G's RAM and 4 HP 1TB 6G 7.2k rpm SATA (3.5in) Non-Hot Plug MDL HDD disks. It was surprise to me that HP didn't provide debian drivers for ...
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3answers
1k views

SQL Server 2012 RAID Setup and Performance [closed]

At my company we are in the process of setting up a new SQL Server 2012 box. We have 6 physical drives with 3,000 gigs each. We are considering two different RAID configurations and are wondering ...
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2answers
162 views

Indepedent pairs of RAID 1 is superior to RAID 10

I am rather new to databases. I was reading up on RAID Storage and it seems that the consensus is that RAID 10 is RAID 10 is best is terms of performance and redundancy However at the end ...
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1answer
118 views

determine which drive in a raid failed windows server

I'm a volunteer assistant IT guy at a local nonprofit. Over the weekend, we had our main server fail, requiring a reboot. After reboot, we were notified that "a volume initialization is in process." ...
2
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1answer
151 views

Drawbacks with smaller fdisk partitions, mdadm RAID10, LVM and KVM?

I am setting up a new virtualized server with KVM and LVM. The KVM host and all guests will be installed on a SSD drive. Each guest will have access to a RAID10 array made of 4x3TB sata drives, used ...
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2answers
918 views

LSI Cachecade Pro 2.0 with RAID10 SSD Cache?

I'm trying to add a RAID10 SSD Cache to a VD by this command: [root@livecd storcli]# ./storcli64 /c0 add vd cachecade type=r10 drives=252:4,252:5,252:6,252:7 assignvds=0 Controller = 0 Status = ...
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2answers
515 views

RAID 1 - IOPS Write Penalty 1 or 2

I keep seeing articles describing the RAID IOPS write penalty for RAID 1 (and RAID 10) as 2. RAID 0 would have a penalty of 1, of course, since every write is simply written to disk. RAID 1 is ...
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1answer
220 views

RAID 10 SSD Benchmarks [closed]

I haven't been able to find any benchmarks for the following setup: Intel Cherry 520 SSD x 4 RAID10 with LSI 9260 writeback-cache enabled. I'm looking to get 1.5gbps sequential
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3answers
572 views

RAID10 Without BBU, With UPS

My datacenter says that each rack has primary and backup power on each rack. I assume this means there is a UPS for each server. Therefore, do I have any need of getting a BBU for the following setup? ...
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1answer
107 views

Growing a hardware RAID-10 array

I am interested how to grow a RAID 10 array on Windows SBS 2011 machine? Basically I have added two additional disks, expanded array and now I want to grow my c: filesystem to take advantage of new ...
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2answers
4k views

How to move RAID 1 to RAID 1+0

I have two HP disks in RAID 1 (300 Gb), and would like to at 2 additional disks in RAID 1+0 having in total of 600 Gb on C:. I would like to know is it possible to do it using Array Configuration ...
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1answer
636 views

How do I check if server really has RAID 10 enabled?

I have a dedicated server with 4 hdd and RAID 10, with Cent OS 6.4 How can I check if RAID is really enabled. I'm in doubt because on another server with RAID 10 enabled, I can see in /dev sg0 sg1 ...
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1answer
122 views

Does the built-in CentOS software RAID distribute writes?

Will I see a write performance increase going from single disk to CentOS Software RAID10? Any industry estimates on the % increase?
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0answers
663 views

Expand Raid 10 set on MegaRAID LSI 9261-8i

I have an existing Raid 10 drive with 8 drives. 4 in each span. I can't figure out how to expand the set by adding two more drives, one to each span. I'm using the MegaCLI command line tool. I ...
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1answer
367 views

Preseed RAID10 does not seem to work

I have this config (excerpt) for my preseed d-i partman-auto/method string raid d-i partman-auto/disk string /dev/sda /dev/sdb /dev/sdc /dev/sdd d-i partman-auto/expert_recipe string \ ...
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1answer
435 views

Concerns of simultaneous failure of SSD Raid1

Since SSD's have a write limit requiring wear leveling one would assume that all things being equal 2 identical SSD drives would wear nearly identically if they mirror data writes. When one drive ...
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3answers
4k views

How to create Raid 10 with megacli

I have OpenFiler storage server. Without installing Windows and MSM, I want to create raid10 array from disks 2 to 21. I have already successfully installed MegaCli to OpenFiler but I'm stuck in ...
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3answers
10k views

Configuring RAID 10 using MegaRAID Storage Manager on an LSI 9260 RAID card

Using MegaRAID Storage Manager 13.04 on an LSI 9260 RAID card, which is the correct way to create RAID 10 using 8 drives with maximum redundancy? There appears to be multiple ways to reach the same ...
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2answers
1k views

Increase the size of software RAID 10

Currently I have 8 disks each of size 32G forming a RAID 10. Now, I want to increase the size of this RAID by adding extra disks. This is a production device so there is already critical data in the ...
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0answers
209 views

What RAID policies should be used for a XenServer host?

I have a server with a PERC6/i card and a RAID-10 array running XenServer 6.1 with 6x VMs, one of which is SBS 2008 and the rest are a mix of file server, video-on-demand and SQL database server. The ...
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3answers
3k views

Convert RAID 5 to RAID 10 without data loss

I have a Windows SBS 2011 server on a Dell R610 with RAID 5 configuration [3 disk]. Is there a way to convert it to RAID 10[4 or 6 disk] without losing anything or needing to re-install the whole OS ...
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3answers
467 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: ...
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1answer
56 views

recovering from raid 10 single disk failiure

I got a terastation with 4 disks in raid 10 setup. But one of them failed recently. Instead of inserting the disk and restructuring is it possible to copy the data to another disk outside the ...
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2answers
293 views

upgrade windows server from 2003 to 2008

My PowerEdge 2900 server currently is a windows server 2003 thats configured as a RAID 5 Using PERC 6/i Integrated with 3 750GB Disks. Whats the best way or, the order of steps to upgrade it to ...
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2answers
131 views

server load extremely high trying to diagnose [closed]

The server load is extremely high. I'm trying to diagnose what's going on. Screenshot attached. edit: OS is CentOS 5. Not running anything like plesk or cpanel, etc.. The raid10 has 1 failed ...
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1answer
806 views

Capacity Expansion on PERCH700 RAID-10

I have Dell Poweredge R710 server with PERC H700 Integrated RAID controller. Currently there are 4 SAS 300GB disks in RAID-10 array exposing single volume of 600GB. Server is running VMware ESXi 5.1. ...
2
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1answer
86 views

Update RAID 10 NAS storage

I've got a NAS with 4x500GB HDD in RAID 10. I want to change the actual HDDs to others of 1TB capacity, but I want (if possible) to preserve the data without having to copy it outside the NAS. The NAS ...
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2answers
5k views

One drive failed in my RAID 1+0 array, am I safe to replace it without losing data? [duplicate]

The first drive in my 1+0 RAID array is showing a status of predictive failure. There are two drives in the array; is it safe to replace this without losing any data? I will be replacing it with the ...
2
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1answer
436 views

Raid-10 - how many disks should i span for read performance?

We manage a mid-sized array of images (4kb -> 1mb or so) using DAS hardware that is NFS exported to various webservers. We have traditionally used raid5 for the safety-net and storage-gains, rather ...
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0answers
54 views

Is it possible to modify the raid volumes once the OS is installed? RAID10 Windows Server 2008

My problem is the following: I've rented a dedicated server with RAID10, but they have set only one volume in raid -> Disk0. The Disk0 has 12 Tbs but with MBR i can only use the OS partition 100Gb ...
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1answer
211 views

Server with RAID10 basic partition management

First of all i must say that i'm totally noob to server management. I've rented a server with 8x3TB HDs and RAID10 installed. In the Disk Management section (I use windows server) i see two ...
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1answer
321 views

Linux software RAID 10 array, failed drive, resize file system and migrate to a 3 drive RAID 1?

I have a software RAID 10 array which I recently noticed went into a degraded state. The OS is CentOS 5.8. It has 4x 500GB drives in 3 different arrays: /dev/md0 is RAID 1 and mounted to /boot (200MB ...
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1answer
795 views

Device in software RAID 10 array: clean, degraded. Ouch?

I've got 4x 500GB drives in software RAID. /dev/md0 is RAID 1 and mounted to /boot /dev/md1 is RAID 10 and is swap /dev/md2 is RAID 10 and is the main system and data device I looked at mdadm this ...
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1answer
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Rebuilding RAID 10 array with two failed drives

I have dedicated server with 4 HDD in hardware RAID 10 configuration and It worked fine until yesterday, when It started to crash randomly on couple minutes. I’ve contacted my data center and they’ve ...
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1answer
4k views

RAID 10: SPAN 2 vs SPAN 4

I am currently configuring RAID 10 (first time doing RAID ever) for a server at work. In the Configuration Utility. I am given the option of either span 2 or span 4. Having never done this before, I ...
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1answer
834 views

Software Raid 10 corrupted superblock after dual disk failure, how do I recover it?

I have a software raid 10 with 6 x 2tb hard drives (raid 1 for /boot), ubuntu 10.04 is the os. I had a raid controller failure that put 2 drives out of sync, crashed the system and initially the os ...
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1answer
533 views

Raid 10 - Very slow [closed]

I have Software Raid 10 setup, it has been working great a few months. When I did a quick HD speed test: dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync It is taking forever and I had to ...
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1answer
270 views

FreeBSD 9 (amd64) reboot/shutdown process is very slow

I have a Dell Poweredge 2900 III with FreeBSD 9 (amd64), the server uses mfi wich handles a raid10, I had to reboot the server, but notice that either when rebooting or shutting down the server, ...
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1answer
344 views

How to re-add a RAID-10 failed drive on Ubuntu?

I have a problem that I can't seem to solve. We have a Ubuntu server setup with RAID-10 and two of the drives dropped out of the array. When I try to re-add them using the following command: mdadm ...
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1answer
471 views

create raid10 with lvm

I came across an error when I create RAID10 with LVM2. I have four PVs and when I create LV using this command: sudo lvcreate --mirrors 1 --stripes 2 -l7630 -n lv0 vg0 --corelog display the VG, it ...
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1answer
111 views

RAID 10 — still a little unclear on the concept [duplicate]

Possible Duplicate: What are the different widely used RAID levels and when should I consider them? I haven't had any trouble building mental images of the simpler RAID forms, but for some ...
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3answers
1k views

RAID 10 or RAID 50 on 16x 900 GB 10K SFF disks

What type of RAID would you recommend for a single storage segment across 16 of 900 GB 10K SAS SFF disks on an EMC VNX 5100 storage unit? Disk 17 is a hot-spare. RAID 10, RAID 50 or something else? ...
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1answer
792 views

raid10 in mdadm reports incorrect “Used Dev Size”

I previously had a raid5 with mdadm using four 2TB drives. I've recently disassembled the raid and created a raid10 with six 2TB drives, but mdadm --detail is showing "Used Dev Size" as only 2TB (the ...
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1answer
120 views

Building hybrid RAID10 + RAID5 environment

I have the following configuration: simple video surveillance system (server 1: recording past 24h; server 2: recording past 30 days). I am primarily using the content on the 24h storage, while I ...
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1answer
298 views

Poweredge R710 configuring RAID 10 with one disk missing

I have ordered Poweredge R710 server with 4 diskas planning to configure them as RAID10. However I only got 3 disks delivered (4th will be delivered in 10 days). I am wondering can I create RAID10 ...
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0answers
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four-disk md raid10-far can be assembled and ran as “clean, degraded” with only 2 disks. Bug or i'm missing something?

Today i was solving raid failure on raid10-far with four disks. One disk failed and another wasn't re-added after a hard reboot. The mdadm -D was reporting it's clean and running with only two out of ...
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perfmon reporting higher IOPs than possible?

We created a monitoring report for IOPs on performance counters using Disk reads/sec and Disk writes/sec on four servers (physical boxes, no virtualization) that have 4x 15k 146GB SAS drives in RAID10 ...
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1answer
237 views

Maxed out disk space on RAID10. Thoughts on moving forward?

I have (4) 146GB HDD set to a RAID10 on one server. I have now run out of disk space and I would like to increase it, however, I do not have any available slots to install more HDD's and no available ...
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Calculating correct stripe size for Linux mdadm RAID10 arrays in “far” layout

I'm creating RAID10 array from 6 drives. When created in near layout, e.g. mdadm --create /dev/md2 --chunk=64 --level=10 --raid-devices=6 --layout=n2 /dev/sda1 ... Checking stripe size as ...
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Is this a possible/good RAID setup?

Earlier this week, one drive in our office's 2-year-old RAID5 array (4x 750GB Seagate drives, HP ProLiant 110 with Smart Array controller, running Windows Server 2003) failed. From what I know, RAID5 ...