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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RAID can't rebuild Rebuild offen missing HDD

First i would likes to say the raid configurations of my server. Intel RAID 10(4*1TB HDD) two from wd, 1 from hitachi, 1 from seagate + 1 seagate as hot spare Here goes the problem the last hdd ...
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738 views

mdadm: Convert RAID10 to RAID1

The machine in question is equipped with 4x ssd, and running Debian wheezy 7.8, linux kernel 3.2.0-4, mdadm v3.2.5. Currently I'm using a RAID10 consisting of all these ssd. I've to increase the ...
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627 views

Mdadm Raid10 - Files corrupt

I have a Raid10 array using software raid on 4*2-tb drives. My OS on this Raid array froze and when restarting my system via Ubuntu-CD i noticed the Raid array was gone. I assembled the raid array ...
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744 views

6 times slower disk write in RAID10 on Ubuntu 14.04 after rebuild

OS: Ubuntu 14.04 LTS Software Raid 10: 4x120Gb Intel 530 SSDs Initial tests: 1.2 GB/s Write 5.2 GB/s Read I did some tests to check if everything will go alright with a failed disk: I set as ...
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278 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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61 views

Shared storage solution for our sql server backups

We have 3 clustered sql servers. We have 5+ multi terrabyte databases and their backup files (compressed using quest litespeed) are hitting over 600gb each, We are required to keep at least a week or ...
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40 views

Active Directory clients performing slowly after HDD upgrade

I have a Windows 2008 R2 AD server operating on my network, it recently ran out of space and I upgraded to 2TB SATA drives instead of the 300GB SAS drives it came with, I configured my 4 drives in ...
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79 views

Slow RAID & system performance on large file write

I'm moving a large VHD file to a new VM host over the network. I've checked and double checked every point of bottlenecking here and it is 100% the server doing the writing causing an issue. It's a ...
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1answer
815 views

Adaptec 5405 doesn't rebuild the array for changed disks

I had a 4 disk RAID 10 configuration (as 2 logical arrays) on one of my servers and noticed that the server was down. When I reboot it, one the disks was missing. Talked with the datacenter and they ...
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95 views

Why I am the raid configuration tool is now allowing me to create RAID 10?

I have an older dell power edge 6800 server. I have upgraded it a bit and I want to utilize it. So I wadded some ram and some drives. it currently has 12 drives. 2 @ (146gb) 10 @ (300 gb) I ...
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695 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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873 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. ...
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1answer
352 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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2k views

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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162 views

Why don't enterprise RAID controllers support migration from RAID 5 to RAID 10?

I've been doing some research on the possibility of live migration from RAID 5 to RAID 10 and I'm curious as to why it seems that most RAID controllers (particularly Dell's PERC controllers) don't ...
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189 views

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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451 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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0xD1 on megasas2.sys with LSI-9240-8i during data transfer

I have an older Intel S3210SHLX motherboard with a HighPoint 2310 RAID card, running four 500GB drives in a RAID5 array. The OS is WHS2011, and everything is fine, except that I'm running out of room. ...
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30 views

How to backup and restore with tar in a software raid 10 configuration?

I've successfully backed up and restored using tar with VPS that were not raided. Now I have a setup at my residence that requires raid, specifically raid-10. If I attempt to restore the tar it fails, ...
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10 views

Particular RAID10 Disk Status Not Documented

I am trying to get information about a problem that I have with a server with an internal RAID 10 configuration. I do not think going into too much detail about the specifications of my system is ...
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37 views

What are the proper Readahead values for a RAID 10 array over 4 EBS PIOPS volumes?

tl;dr - What are the proper readahead values for the different EBS PIOPS volumes in a RAID 10 array ? What about the RAID 10 physical and logical volumes themselves ? What about the chunk size of the ...
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805 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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226 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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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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Fixing smartd errors on btrfs raid 10

I had some errors during smartd test May 5 10:08:05 c3po smartd[856]: Device: /dev/sdb [SAT], 236 Currently unreadable (pending) sectors May 5 10:08:05 c3po smartd[856]: Device: /dev/sdb [...
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RAID10 array lost after reboot | Amazon Linux

I carefully followed this procedure to setup RAID10 on Amazon Linux: https://mongodb-documentation.readthedocs.org/en/latest/ecosystem/tutorial/install-mongodb-on-amazon-ec2.html I also upgraded ...
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65 views

Debian 8 dpkg extremely slow

Using debian 8 (fresh installation), i downloaded webmin using: wget http://prdownloads.sourceforge.net/webadmin/webmin_1.780_all.deb then i installed it using: dpkg --install webmin_1.780_all....
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104 views

RAID 10 Unexpected sense followed by Initialization corrected medium error

The MegaRAID controller on one of my servers just started spamming Information messages this afternoon. It will send six to ten Unexpected sense messages from PD: 7 followed by roughly the same amount ...
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172 views

LSI SAS2208 poor RAID 10 peformance

Due to customer and sales being inattentive, the customer bought a Lenovo/IBM x3650 M4 using the onboard m5110e RAID for a mix of RAID1 and RAID10, but without the RAID RAM memory, the flash backing ...
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217 views

wrong # of devices in RAID set on Centos 6.7

I just set up one of our servers with Centos 6.7. It's a machine that hasn't been in use for at least a year. I had to set it up a couple of times but every time one of the problems was with the ...