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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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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IBM System x3650 M3 - how to expand RAID 10 array

I have RAID 10 array on my IBM System x3650 M3 server - four drives IBM 146GB 10K 6Gbps SAS 2.5". I bought four new drives (also 146GB 10K 6Gbps) because soon I may have problem with free space. Can ...
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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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RAID 10 - many slow disks vs fewer fast disks

I am looking to buy HDDs for a single server which will be used as development server. The server will use ESXi as hypervisor and will have some but not too many virtual machines (web server, database ...
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24 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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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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39 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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Can Docker Corrupt a Software RAID Setup? [closed]

I read that software RAID should not be implemented on a machine that also has ESXi virtual machines running. Does this mean that I would want to avoid LVM and or LXC/Docker containers as well on this ...
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61 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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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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Can a RAID 10 array be transferred from a Windows box to a Synology (or other) enclosure? [duplicate]

Currently I'm debating about whether I want to use a spare workstation running Windows 10 and turn that into the enclosure for a 4x6TB RAID 10 array since it has decent hardware specs or wait until ...
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36 views

Upgrade RAID 10 with 7200RPM SATA

We have a Dell T320 with a S110 software RAID with 7200RPM SATA drives. The RAID level is 10 with four drives. I underestimated the demand on the disk, and it is now a major bottleneck of the system. ...
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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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2answers
1k 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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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 ...
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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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38 views

linux software raid10, identical machines, wildly different results

I am having wildly different software raid10 performance and behavior on two otherwise identical machines. I have two machines which are hardware identical, bought at the same time, with the same ...
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Why does a raid 10 device need to be initialized?

When creating a linux software raid device as a raid10 device, I am confused why it must be initialized. The same question applies for raid1 or raid0, really. Ultimately most people would put a file ...
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179 views

Acceptable I/O speeds for 6 x 250GB SSDs in RAID 10

I'm running CentOS 7 (XFS filesystem) on a dell server with a PERC H700 raid controller. Inside this server I have 6 x Samsung 850 Evo 250GB SSDs (yes they are consumer drives however, this is a home ...
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41 views

ServeRaid M5210 high temperature

I have a serveraid M5210 card on X3650 m5 (raid10) And a M5110e raid card on X3650 m4 Both raid card is high temperature (70-75 C) images: http://i.imgur.com/oa2O7ba.png ...
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103 views

Server 2012 R2 and RAID 10

I recently purchased a shiny new server running 2012 Standard R2 and want to add four 512GB SSDs for my VMs. I would like to set them up in RAID 10, but I'm not quite figuring out how to do so within ...
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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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Raid 10 implemented on server. Need to know about its performance when one of the disk fails

Server will be implemented with raid 10 using two 4TB disks.Can anyone help me answering what will happen to the server if one of the disks fails will there be any interruptions on the server? Thanks ...
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153 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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202 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 ...
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700 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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168 views

Why are all drives dropping out of RAID when 1 fails? LSI9260-8i/IBM M5014

I've got an interesting problem I'm hoping you all can help me with. I have an IBM 5014 (the LSI 9260-8i equivalent) running two RAID10 virtual drives. The first is 4 WD RE4's, each 2TB, for a 4TB ...
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209 views

More available space than expected using btrfs RAID10?

I had just created a btrfs RAID10 array in my Ubuntu 14.04 box for the first time by using the command: mkfs.btrfs -d raid10 -m raid10 /dev/sda /dev/sdb /dev/sdc /dev/sdd My 4 hard drives are each ...
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44 views

md raid10: how to make sure that replicated data is stored in right place?

When creating classic mirrored raids, it's usual to locate copies of data on disks of different kinds. In this case you would use a mix of disks of different series and manufacturers. That reduces the ...
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EBS+RAID10+XFS slower than EBS+RAID10+EXT3 using MySQL?

We're currently using EC2 with 16 EBS volumes in RAID10 configuration for our MySQL data. I know some people don't recommend to put EBS volumes to RAID but that's not what I'm concerned about at the ...
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Very poor disk performance on KVM node - mdadm raid10

For a long period of time, i'm experiencing performance issues on CentOS servers that are used for KVM virtualization. I'm running software RAID-10 with 4 disks (Seagate ST2000DM001, 2TB, 7200rpm ...
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199 views

Expanding Disk Space on PowerEdge R710

I want to expand the disk space on an R710 with a PERC H700 Integrated. It is currently configured with: 2 (3.5" SAS 6Gb/s 15000 RPM) drives in a RAID-1 For OS. 4 (3.5" SAS 6Gb/s 15000 RPM) drives ...
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922 views

HP Proliant DL360p Gen8 server faulty hard disk replacement

I had a faulty disk on my HP Proliant DL360p Gen8, which has p420i controller and Raid10, and spare replaced the faulty one automatically. OS is RedHat 6. I want to do hot swapping work to install new ...
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218 views

Slow read speed. Raid 10 + H700 (1GB RAM + battery) + 4x 450 Hitachi 15K

So I have installed 4x 450GB Hitachi 15K in Raid 10 (Dell T610 + H700 + mem + battery). I have very simple issue. Read speed is terrible, I have also installed Raid 0 (2x 3TB WD Red) and speeds are ...
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250 views

How to fix my broken raid10 array

I have a RAID 10 consisting of 4x3TB drives. It had become degraded (sdd had dropped off). I thought I had fixed it and it was rebuilding, but now (I think) sde appears to be causing problems. ...
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RAID 10 or RAID 1 x 2 for Hyper-V with AD, EXCHANGE on Windows 2008 R2

We have 2 servers which have 6 SATA 7200 disks inside (each). We want to configure both servers so that they will have Window Server 2008 R2 Enterprise installed and on top of it Exchange 2010 x2 (for ...
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92 views

How to add a harddisk back in raid10 array?

I have a harddisk that is out of raid array. I wanted to create the partition table on sda basesd on the sdb table and I issued this command: sfdisk -d /dev/sda | sfdisk /dev/sdb --force I know ...
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2k views

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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Rebuilding array on 3ware 9690SA-8I

TL;DR version RAID10 array working fine Reboot server as part of maintenance Array inoperable (no access whatsoever) Controller logs say a single drive is bad Remove drive & test - no bad ...
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How to rebuild a dmraid RAID10 array?

Q: How do I force a rebuild? The following describes the scenario. I've been experimenting with forcing a RAID10 to rebuild, so I could see what dmsetup status output should look like when a RAID is ...
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What are the Pros & Cons of Software RAID vs Hardware RAID of 4xSSD(512Gig) in RAID10?

I'm getting this server: Supermicro SuperServer 6018R-TDW It comes with this motherboard: Supermicro X10DDW-i I've decided going with 4xSSD(512Gb) in a RAID10. My server is busy with a demanding ...
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What are the pros & cons of 4xSSD(512Gig) in a RAID10 vs. 2xSSD(1Tb) no RAID?

Lots of read and write operations that my current setup of 4xSAS15k drives in RAID10 is having made me think of a new fast storage. My server is busy with a demanding database, lots of pages, php ...
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RAID 10 Stripe Size for XenServer

Below is our current server configuration. In a few weeks I will be simulating a disaster recovery by installing 5 new disks (1 hot spare) and restoring all VMs from the backups. Will I gain anything ...
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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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185 views

Best span size for 12 x 2TB drives in RAID10

We have just taken delivery of a new JBOD chassis, with 14 x 2TB NL-SAS drives - 2 have already been earmarked for enclosure spares, so we have 12 drives available. I have several options for setting ...
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150 views

6 GB/s SAS RAID 10 (6 Drive) vs. 3 GB/s SAS RAID 10 (14 Drive)

I am running MS SQL 2014 Standard and have a Dell MD 3000i iSCSI SAN. Rough specs: Dell R610 With PERC H700 controlling 6 x 2.5" 15K SAS drives (6 GB/s) Dell MD3000i with 14 x 3.5" 15K SAS drives ...
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90 views

RAID 1+0 redundancy and data-loss recovery capability against RAID 1

I have a HP ProLiant server with two SCSI drives. I wanted to set up a RAID 1 array but the RAID configurator only allowed me a RAID 0 or a RAID 1+0 array. When either of my drive fails can I recover ...
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899 views

How does LSI MegaRAID actually lay out RAID10 sets?

I'm trying to set up a RAID10 set on an LSI MegaRAID controller. It is unclear to me how the RAID controller will actually lay out the RAID set on the physical drives. Part of the problem is that ...
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494 views

RAID 10: Does it impact performance if I have 24 small drives in Raid10 vs. 4 larger drives?

Does it impact performance if I have 24 small drives in Raid10 vs. 4 larger drives? The root of the question is does it have any performance or redundancy benefit if I fill out all 24 of my bays with ...
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358 views

Plextor SSDs don't work reliably in HP DL380p Gen8 servers

We recently purchased a few HP 380p G8 servers to add some VM capacity, and decided to add a pool of SSDs to our standard build, to create a "fast" RAID 1+0 array for some of our VMs that have higher ...