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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

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1answer
14 views

mdadm: Resume initial sync

I have a new md RAID10 that I created (on a Synology DS416slim, which is besides the point), which was in the process of initial sync: root@ds416slim:~# cat /proc/mdstat Personalities : [linear] [...
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1answer
69 views

RAID 10 only show half array size

I setup RAID 10 with 4 hdd (4x 2TB), but after raid process I can only see 2TB space. Please advice how to fix regarding space problem? Below result from df -h only show 2TB harddisk rather than 4 TB ...
2
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1answer
96 views

Add btrfs devices to raid1 array, increasing total size

I have a btrfs array comprising of two 2TB disks in raid 1. I am running out of space, and I want to add two 3TB disks that I have lying around. The final setup will be 2x2TB+2x3TB drives. One drive ...
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1answer
70 views

Online capacity expansion of RAID10 on PERC H830 Unavailable

Per updates notes on Firmware ver 25.3.0.0016 (link), the PERC H830 now supports online capacity expansion (OCE) of RAID10 volumes with less than 32 disks. Our card is at firmware 25.5.x. We have ...
9
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1answer
308 views

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 ...
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3answers
105 views

Difference between software and hardware RAID 10 if the server suddenly shut down

today I have a question that I can not answer. Our servers are dual power and battery. The operating system never crashes. (thanks linux) Now, I wonder what happens if the server suddenly shuts down?...
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40 views

Got only half the space of RAID10 LV with 4 PVs (similar to RAID1 cause LV shows it has 4 'Mirrored volumes')

I'm trying to build an raid10 lv for root fs. I used these commands: lvcreate --type raid10 -m 1 -i 2 -l 24576 pve # created lvol1 lvcreate --type raid10 -m 1 -i 2 -l 8 pve # created lvol2 lvcreate --...
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1answer
94 views

Marvell 9230 - RAID 10 3 disks suddenly appear as unconfigured

I was rebooting my NAS running Open Media Vault, and noticed that the RAID controller (Marvell 9230) reported degraded RAID operation since one disk wasn't found. I shut down the box to investigate. ...
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0answers
302 views

Persistent multiple medium errors on LSI RAID array

One of our SuperMicro servers with an onboard LSI 2308 RAID controller has been having issues with our main RAID10 array consisting of 4 Seagate 600 PRO SSD drives (in slots 0,1,2,3). It started with ...
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0answers
103 views

Extending RAID 10 on MegaRAID

So I had a few servers with 8 drives configured in RAID 10. Four pairs of two drives in the RAID1 level. One of the drives went bad and the RAID controller removed one pair from the set, so it now ...
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1answer
50 views

HP P410 offline RAID expansion and migration

I have a 2 x 146GB SAS in RAID1. I bought 2 more, same specs drive. I am on a production server. I have a P410 with 512MB cache, but no battery. I can afford a downtime. My questions are: Can I load ...
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1answer
650 views

RAID 10 with SSDs on LSI 9260-8i has bad performance

I am trying to get a raid 10 running with LSI 9260-8i (IBM M5015) and 4 x Samsung 850 Pro 512GB SSDs. The problem is, that the resulting sequential write performance is really bad (< 100MB/s). ...
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0answers
244 views

RAID 10 + bcache + LVM

I'm planning to setup a new RAID 10 array using Linux mdadm with bcache and LVM. The way I think about it is that first I create the RAID 10 array then I use the array as a backing device for bcache ...
2
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1answer
268 views

MegaRAID storage manager update and now tons of media errors

I was just poking around a 5 year old server and noticed the MegaRAID storage manager (14.08.01) appeared to be not responding. The server has been running for something like 400 days without ...
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1answer
1k views

RAID 10 on Centos 7

I've just set up a RAID 10 on an old server with 4 hard drives with the centos7 installer, but I am very confused about the result Here's the output of /proc/mdstat Personalities : [raid10] [raid1] ...
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1answer
60 views

Is it possible to extract Raid Controller configuration index from on to another?

We have a Fujitsu server with this specific RAID Controller (FUJITSU PRAID EP400i / EP420i). We want to export the configuration of that RAID Controller to a new one, so in case that RAID controller ...
0
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1answer
287 views

3ware 9550SX RAID-10, one degraded drive, rebuild and initialization stuck

Question: Is there a way to force this to rebuild? I'm also toying with the idea of turning the system off and attempting to rebuild it in the 3ware controller BIOS. If I turn this system off in ...
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2answers
1k views

2 x RAID1 vs. RAID10 with four disks

I have a QNAP TS-412 NAS and used two disks so far. I decided to upgrade to four disks and now have options with respect to RAID. I am looking for maximum security against failure of disks (preferably ...
1
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1answer
2k views

Mount a hardware RAID in Ubuntu 16.04 LTS

I added a hardware RAID to my server. It was configured with the LSI-MR9361-8i as a 87TiB RAID 10. sudo fdisk -l returns: Disk /dev/sda: 87.3 TiB, 96009698934784 bytes, 23439867904 sectors Units: ...
4
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1answer
440 views

Grow ZFS mirror

I have a ZFS pool with 6 disks in a RAID 10 configuration. I would like to upgrade the drives in one of the mirrors, from 1TB to 3TB drives. I have all the drives installed in the system. I would ...
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1answer
370 views

What are RAID 1/10 mismatch_cnt > 0 causes except for swap file?

Two of four of my servers currently have mismatch_cnt about 40000 and that worries me. We are using RAID10 setup. Manual states, that However on RAID1 and RAID10 it is possible for software issues ...
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2answers
210 views

How to fix zpool detach hanging the entire pool?

When trying to replace a disk in a zpool on a FreeBSD 10.3-RELEASE-p20 system yesterday, the zfs filesystems became unresponsive after issuing the zpool detach srv gpt/d0 command. The server acts as ...
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1answer
300 views

RAID 1+0 with odd number of drives

Recently I set up a Dell R720 to be a file server. 2 of the 16 drives were used for the OS (RAID 1) while the other 14 were used for RAID 10, or so I thought. I opened up OpenManage today and saw that ...
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0answers
251 views

Grub2 Does Not Recognize Filesystem on Fresh CentOS 7 Install

I'm installing CentOS7 on a Dell r510 server with UEFI. There is RAID 10 setup on it via a PERC 6i RAID controller. The proper drive space seems to be recognized with CentOS without issue, and is ...
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2answers
235 views

Degraded RAID10 Array?

Earlier today I received an automated email from mdadm monitor with the following: This is an automatically generated mail message from mdadm running on server This is an automatically generated ...
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1answer
251 views

RAID 6 array much faster than my RAID 10 array?

How come my RAID-6 outperforms my RAID-10? Docker container on Synology with 8x4TB RAID-10: [root@centos Files]# bonnie++ -d /Files/tmp -r 16G -s 32G -n 1 -f -b -u root Using uid:0, gid:0. Writing ...
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1answer
289 views

mdadm assemble ignoring --force? Raid10 minimal difference in 'Actions' between Harddisks

My server Is runnIng a 4 dIsk software raId 10 based on mdadm. EarlIer today a small power outage shut down the server and now It only boots to the InItrd emergency system (ubuntu 16.04), complaInIng ...
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1answer
34 views

RAID10 and RAID0 partitions

Actually I have this kind of configuration: 4 HDDs and 1 SSD linked via SATA 1 SSD (8GB) linked via eSATA RAID 10 of the 4 HDD partitioned as [ / ] and [ swap ] SSD1 as [ /boot] SSD as [swap] Now ...
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0answers
65 views

Avoiding same batch of drives being mirrored in a mdraid 10 Linux array

root@RS3617RPxs:~# cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [raidF1] md3 : active raid10 sde3[8] sdl3[7] sdk3[6] sdj3[5] sdi3[4] sdh3[3] sdg3[2] sdf3[...
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1k views

How RAID 1 and RAID 10 become different when there are 8 logical disk?

RAID level 01 is the hybrid version of RAID 1 and 0 and this is illustrated below. Source: Wikipedia.org In COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE (NINTH EDITION), by ...
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38 views

What happens when Raid 10 Arrays are full?

I've been researching recommended raid types for Database storage, VMs, as well as other server related uses, and the common answer I see is Raid 10, for performance and protection. It is my ...
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2answers
224 views

Single disk failure on RAID10 making data unavailable

I have an odd situation here. I have a Dell R620 with the PERC H310 mini controller. There are 2 RAID arrays, a 2 disk mirror for the OS and a 6 disk RAID 10 for the DATA drive. When a single disk ...
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1answer
1k views

Perc H700: Rebuild RAID array manually

I have a RAID 10 array on Perc H700 RAID controller in a R510 lab server. One of the disks in the RAID array failed. Since it's a lab box and I don't need to worry about down time, I just shut it down,...
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1answer
100 views

converting from raid 10 to raid 1 on windows server 2012 r2

My current setup is that my OS and other important installed files are all installed in my raid 10 array, however, I need the 2 drives (ssd) in the array for something else, is there a way to convert ...
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1answer
105 views

Dell PowerEdge R710 with 6 450GB SAS Drives Only sees 5?

I have this weird issue that I've been trying to figure out but been stuck for a week.. Issue Summary below: 6 BRAND NEW SAS Cheetah drives 450gb on Poweredge R710. Configured Raid 10 with result of ...
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1answer
129 views

POST event error with IBM x3550 ServeRAID setup

I lean toward software RAID instead of the hardware RAID for recovery concerns. I've read about disasters when a RAID card fails and heard many with success stories restoring with Linux RAID on ...
0
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1answer
310 views

Add new Raid 10 Array to Existing Dell PowerEdge R630, VMWare esxcli host 5.5

We have an existing Server (Dell PowerEdge R630 - Perc H703P Raid Controller ) running VMWare host 5.5. The server has 2 existing Raid 1 arrays. We would like to add an additional Raid 10 array (4 ...
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0answers
198 views

Which disks in an mdadm-managed RAID-10 near-layout array mirror each other? How to distribute it on multiple SATA controllers?

I'm running a small raid10 mdadm array that looks like follows: # cat /proc/mdstat Personalities : [raid10] md0 : active raid10 sdd[3] sdc[2] sda2[0] sdb2[1] 5859211264 blocks super 1.2 512K ...
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0answers
397 views

megaraid storage manager doesn't see localhost raid

we have linux red hat 6 on ibm server and we had raid 10 on it which we monitored with megaraid storagemanager and everything was fine. but on 3 days ago we restarted server (poweroff, pressed button ...
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1answer
705 views

lsi megaraid convert raid 0 to raid 10 without data loss?

I am using a lsi megaraid controller with firmware version 2.130.353-1819 (aug 09 2012). There I had a raid 5 with 4x4tb disks. What I wanted to do is to migrate from raid 5 to raid 10. The megaraid ...
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1answer
88 views

Is It Bad Practice to Run 3 Copy MD Raid10 Array in Degraded State?

Is it bad practice to run a 3 copy MD RAID10 array on two drives with a missing drive in place of a 2 copy MD RAID10 array on two drives to allow for the addition of a third drive in the future? We ...
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1answer
885 views

Raid 10 recovery on Dell Server - Perc 6/i

I have a Raid 10 setup on Dell Perc 6/i controller with 4 drives + hot spare. While server was off, new drive was added yesterday in drive 1 slot that was empty for last 2 months. After turning ...
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1answer
37 views

RAID data integrity issue [ RocketRAID 3522 Controller using RAID 1/0 Windows ]

I need some advice on how to proceed with an issue that I realized I had with data corruption on a 4TB RAID 1/0 array using the RocketRAID 3522 Controller. I'm noticing that the SHA1 file hash does ...
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1answer
47 views

SAS Raid Array A with Spare. If I remove bad drive will the Spare pick up?

I re-posted below. My apologies, I accidentally uploaded a very old pic by accident.. My server Array
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1answer
451 views

Replace a physical drive that is part of RAID 1+0

I have a physical hard drive that has a status of imminent failure. It is part of a 4 x 1TB RAID 1+0. The controller is Smart Array B110i SATA RAID in Embedded Slot and the server is HP ML110 G7. I ...
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4answers
320 views

4-Drive Software RAID1 vs RAID10 for Extreme Reliability Purposes

4-Drive Software RAID1 vs RAID10 heading tells you what I am contemplating about. Hardware: 2x 1TB Enterprise-class HDDs + 2x 1TB Consumer-class HDDs. OS and Software: Linux Debian Jessie (stable) ...
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2answers
318 views

Raid 1+0 different disk sizes

I have 2 146GB(146,8 in ORCA) sas drives and 2 72GB(73,4 in ORCA) sas drives. I would like to setup raid 1+0 with these 4 drives. Is it possible to combine the 146GB and the 72GB drives so I get 218GB?...
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1answer
544 views

RAID 10 - 2 Disk Failure, how to know which drives are mirrored and if data is safe?

The server is currently experiencing a 2 disk failure and was looking for a way to know if my data is lost or not. I tried searching everyone but I didn't find an answer (I'm sorry - new to this). I ...
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3answers
195 views

Replace faulty drive in Raid 10 using smaller drive?

I have a Raid 10 array with a faulty drive in a Qnap TS-809. The array contains the following drives: (I know it was a stupid idea to mix the drives in the first place) 1. 2TB WD Red --\ 2. 2TB WD ...
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2answers
1k views

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 ...