Server Fault Stack Exchange
Server Fault Stack Exchange

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.

273 questions
3
votes
1 answer

Is RAID50 OK for a fileserver?

We have a new storage array consisting of 24 x 600GB 10K SAS disks arriving next week, and I'm trying to decide how best to carve up the available space for our 3-node VMware vSphere cluster which will be accessing the array over 8Gb FC with fully…
Craig Watson
  • 9,575
  • 3
  • 32
  • 47
3
votes
1 answer

LVM RAID10 "Won't be synchronised" - What does it mean?

I was creating an LVM RAID 10 across 4 physical volumes (each 3TB) when I got the following error message: WARNING: New raid10 won't be synchronised. Don't read what you didn't write! My googling came up with nothing about what this means. Does…
Programster
  • 495
  • 1
  • 13
  • 22
3
votes
1 answer

Optimal RAID10 configuration for 8 disks and two volumes?

I have an Open-E file server with 8 SAS disks and a MegaRAID 9271-8i controller and I want to configure two logical RAID10 volumes of identical size. One volume has about 66% write access and 33% read access, the other has only write access (it is a…
nn4l
  • 1,336
  • 5
  • 23
  • 40
3
votes
3 answers

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 = Failure Description = Unsupported RAID level In the…
ispirto
  • 529
  • 9
  • 21
3
votes
2 answers

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 described as "requiring two writes", thus a penalty of…
nepdev
  • 391
  • 1
  • 7
  • 21
3
votes
2 answers

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 Utility without loosing and data? Controller is…
John
  • 664
  • 6
  • 15
  • 31
3
votes
1 answer

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 run a system diagnostics and they found that one…
SkechBoy
  • 41
  • 1
  • 6
3
votes
0 answers

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 four disks. When i tried to read the md array…
Koubas
  • 51
  • 3
3
votes
4 answers

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 moment. Current format is ext3, but we're…
Johann Tagle
  • 43
  • 4
3
votes
0 answers

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 redundant too much ? As the linked question shows, I was…
Doron
  • 543
  • 1
  • 6
  • 14
3
votes
2 answers

Software Implementation of RAID 10 on a Windows Server 2008 running on Amazon EC2

Does anyone know of a software implementation of RAID 10 that will work on a Windows Server 2008? Specifically I'd like to use it on a virtual instance running on Amazon's EC2, connected to EBS disks.
Thom
  • 141
  • 3
3
votes
2 answers

RAID10 volume write latency on Windows on ESXi 5

I have a VMware ESXi 5 environment running on Fujitsu BX922S2 blade servers, connecting to a Fujitsu DX90 SAN. I've had no problem with RAID5 volumes, but RAID10 volumes (for MSSQL) are exhibiting ridiculous write latency - up over 1000 ms at times,…
slag
  • 143
  • 1
  • 2
  • 11
3
votes
4 answers

Running swap on RAID10 or RAID5?

In follow-up to this previous question (and it's excellent answer), I am curious to know if running swap on a RAID5 might not be better than on a RAID10. My thinking is that you might lose a bit on the performance because it wouldn't be purely…
warren
  • 18,369
  • 23
  • 84
  • 135
3
votes
2 answers

Mdadm - Change RAID 10 chunk size and switch to "far" layout

I'm running an Ubuntu Linux NAS server with 4 2TB drives in software RAID 10. I created the array during installation (with Ubuntu Server disc), but the layout is near and the chunk size is 64. I want to change the chunk size to 256 and the layout…
Andrew Ensley
  • 932
  • 2
  • 17
  • 30
3
votes
3 answers

Poor software raid10 read performance on Linux

I've recently set up new Linux based file server. The distribution I'm using is Ubuntu 10.10. I've created two software raid devices as follows: mc@vmr:~$ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4]…
mcDev
  • 31
  • 1
  • 2
1 2 3
…
18 19