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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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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." Here's some data about our system: Windows Server…
user202947
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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 for data and storage. My problem is that I have…
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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 \ multiraid:: \ 512 10 512 raid \ …
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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 fails you can assume the other one is holding on by…
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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. I have 4 new SAS 300GB disks that I would like to…
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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 I'm using is a Synology DS411. Right now this…
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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 than losing capacity for the sake of better speeds…
Nick
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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 original one disk raid5 parity) instead of the…
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Estimate the IOPS in RAID 10

According to http://en.wikipedia.org/wiki/IOPS For example SAS disks provide ~200 IOPS each. For RAID 10 consisting of 4 such disks. How much IOPS I could expect for that array? I would think it would be about 400 or is it 800? (800 especially in…
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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 sectors found Err on the side of caution, replace drive with…
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HP DL180 G6 P410 8x SATA 1TB, what is the optimal configuration?

I have a HP DL180 G6 with a P410 raid controller. Presently this runs using 4x 1TB Samsung Spinpoint SATA drives, in a RAID10 configuration using default settings. I am about to add a backplane to increase the drive capacity from 4 to 12 drives, and…
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Adaptec 7901 RAID 10 Degraded Drive - Cannot Rebuild

I have a Tyan server with an onboard AIC-7901. One drive out of four in a RAID10 array is marked as degraded. I power down, pop out the offending drive, put in a good one, reboot and go into Adaptec Storage Manager. However, it errors when I try to…
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grub2 does not find /boot on RAID1 md0 device

I have RAID1 md0 for /boot consisting of 4 partitions (sda2, sdb2, sdc2, sdd2). I'm using GPT on 2TB HDDs, so first partitions on each disk (sda1, ...) are 1-megabyte bios_grub partitions. I also have RAID10 md1 for LVM (containing /) and RAID0 md2…
chronos
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Why MongoDB docs recommends to run Raid 10 on EBS?

They seems like to talk only about performance, which I believe it's not the case compared to other hybrid RAID types. See here: http://www.mongodb.org/display/DOCS/Amazon+EC2#AmazonEC2-EBSvs.LocalDrives
Claudio Poli
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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 rebuilding, and also so I could get some…
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