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Questions tagged [raid10]

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

Minimum disks needed for RAID 10 is 4.

When using RAID 10, 2 RAID 1 volumes are created and then these 2 volumes are put in RAID 0 mode.

Do not confuse this with RAID 01, which creates 2 RAID 0 volumes and then mirrors them. RAID10 layout

Linux MD RAID10 is a non-standard level that can permits setting up unusual layouts beyond what is possible with the standard RAID10. MD RAID10 requires a minimum of only two drives.

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HP Smart Array P410: Convert RAID10 to RAID1 OR remove disks from RAID10

I have a server with two RAID10 arrays of 146GB disks. I'm trying to replace one RAID10 array of 146GB disks with RAID1 of two 2TB disks. Since there are no free ports, I took out two disks from the array which I am going to replace. Now the status…
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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 system of some sort on top of it, and that…
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Why does df shows only half the size of a RAID10 array?

I've created a RAID10 array using 4 75G drives, to create a storage of 150G. After everything finished (including the initial syncing), everything looked good except the output of df -h which showed only 73G storage on the designated mount…
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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 figuring out the correct command line for creating a…
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RAID 10 or RAID 5 for multiple VMs - what is the best choice?

I have just ordered a new rig for my business. We do a lot of software development for Microsoft SharePoint and need the rig to run several virtual machines for development and test purposes. We will be using the free VMware ESXi for virtualization.…
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Can Windows 7 do software RAID 10 (1+0)

Can Windows 7 do software RAID 10 (or RAID 1+0 depending on terminology)? There appears to be a lack of information about software RAID for Microsoft Windows products. Even a search of the microsoft.com offers zero articles about the subject, just a…
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Linux Software Raid 10 hung after 1 drive failed, mdadm will not let me force remove the faulty device

I have a Linux software raid 10 setup consisting of 5 RAID 1s (Two drives per mirrored setup) and a RAID 0 across all 5 RAID 1 pairs. To test that none of the drives were going to fail quickly under load I used badblocks across the RAID 0 with a…
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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 amount of expected disk space. Spanned Drive Group…
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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 reported by the system: cat…
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Why has VMWare ESXi 5 slow access to IBM M1015 / LSI 9240-8i RAID?

I am building server for virtualization and wanted to go with VMWare ESXi 5. I configured RAID10 on 4 disks connected to internal RAID controller IBM M1015 (identical to LSI 9240-8i) and installed ESXi without any problems. Only problem is that…
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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] sda2[0] sdb2[1] 1951397888 blocks super 1.2 512K…
user114604
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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 server. In any case, I performed a DD test and am…
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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 MegaRAID seems to use terms very inconsistently; the…
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Possible to migrate RAID 10 system from 2TB Seagate to 2TB WD?

A couple of our servers have ST32000641AS (2TB Seagate desktop drives) in RAID 10 using an Adaptec 2405 controller. I've been told by Adaptec that this is a bad idea and we have, in fact, already seen one raid system go down using these drives. …
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6 Disk Raid 1+0

I have an HP Smart Array P400i raid controller, with 6 disks, working in a RAID 1+0. This is what it looks like: Mirror Group 0: physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SAS, 72 GB, OK) physicaldrive 1I:1:2 (port 1I:box 1:bay…
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