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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Raid-10 mdadm - How to Manually Configure Mirrored Drive Order?

How do I configure a new mdadm software RAID-10 to use a specific order for its drive mirroring? Say I have 4 hard drives: A, B, C, and D. For my own reliability and performance reasons, I want drive ...
0 votes
0 answers
26 views

Raid10 Shows 5 Active Drives!

I built two raid 10 arrays during an Ubuntu 22.04 Server install, and the system works fine, but one of the two RAID 10 arrays shows all five drives (1 that should be a spare) in "Working" ...
0 votes
0 answers
33 views

Resetting logical Direct-Access Error || RHEL 7.x

We have an error for the LVM resetting device which has been impacting our Linux server during this period. kernel: hpsa 0000:02:00.0: scsi 0:1:0:1: resetting logical Direct-Access HP ...
2 votes
3 answers
953 views

Smart Array P420i, Logical Drive failed, best way to re-enable

I have a HP Proliant ML380p Gen8 server with a P420i controller where one of the logical drives suddenly failed. Screenshot Smart Storage Administrator From what I could see in the Smart Storage ...
2 votes
2 answers
1k 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 ...
1 vote
1 answer
515 views

Really slow FIO random 128 MB read values for a RAID 10 XFS

I've just installed two Samsung 970 EVO Plus drives, and configured the biggest partition as RAID 10 (far 2 layout). The problem is FIO only reports a read speed of 72 MB/s. I used the following ...
-1 votes
1 answer
612 views

How to replace a hard disk in SMART array 410i controller, RAID 1 + 0

I have a HP ProLiant DL360 G7 server (ILO3). Recently I have been receiving a SMART error message related to drivers. When checked The Array configuration it was found that, There are total 8 disks. ...
2 votes
1 answer
60 views

What technically happpens during a RAID-10 initialization?

I am currently doing a foreground RAID-10 initialization for 10x20TB drives. I was curious what else happens, other than just zero-ing out the drives? It must be doing something more than this, ...
1 vote
0 answers
168 views

Multiple drives fail in Dell R730xd when partitioned

I have a used (new to me) Dell R730xd running 2 virtual disks. The first consists of 2x 600GB drives in RAID 1 and the second consists of 10x 6TB drives in RAID 10. The first virtual drive works fine ...
7 votes
2 answers
1k views

RAID10 with 2 failed drives

I have 4 disks in a raid10 array into a dell server. 2 drives are failed right now. The failed drives are not in the same group (1+2 and 3+4), drives failed are 2 and 3. The server is still running, ...
1 vote
1 answer
1k views

Growing a RAID-10 on Synology NAS?

I was hoping to add two additional disks to my Synology NAS. Currently it is configured as a four disk RAID-10, no SHR, BTRFS, single volume system. Unfortunately extending a RAID-10 is not possible ...
2 votes
2 answers
1k views

HP SmartArray: how to extend a fully populated RAID1+0

I have a bunch of machines with HPE Smart Array P408i-a controllers and fully populated drive bays, and I was wondering if there is a way to extend the arrays without dissolving them and reinstalling ...
0 votes
1 answer
2k views

Raid Status - Online vs Ready vs Foreign

What does Raid state Online, Ready or Foreign means? What other state can it be? What needs to be done in such state? I think Online is the only safe state. What are the DO's and Don't during ...
-1 votes
1 answer
338 views

Speeding up SAS data rate from 12Gbps

I'm curious about SAS data transfer speed. Maximum is 12Gbps in the whole bus (not per drive) as far as I understand, but I have a scenario where I would like to have a faster data rate (hopefully ...
1 vote
0 answers
1k views

mdadm RAID10 disks layout

I've been trying to understand how disks are distributed in a mdadm RAID10, but i'm not completly sure. AFAIK, a native RAID10 is similar to RAID0+RAID1, i.e. data splitted in two chunks, each one ...
1 vote
0 answers
502 views

Predictive failure for drive logged the same time every day

On a SuperMicro 1U Box with four drives in RAID 10 A week ago it threw the toys around with three critical errors Controller encountered a fatal error and was reset VD is now DEGRADED VD 0 Consistency ...
1 vote
1 answer
3k views

Adaptec 5405 doesn't rebuild the array for changed disks

I had a 4 disk RAID 10 configuration (as 2 logical arrays) on one of my servers and noticed that the server was down. When I reboot it, one the disks was missing. Talked with the datacenter and they ...
0 votes
1 answer
131 views

How to remove a Raid 1 subgroup from a Raid 10 array?

I have a RAID 10 array with 3 subgroups of drives in RAID 1, like in the image below Raid 10 Is it possible to remove an entire subgroup (2 disks) without losing the entire Array? The RAID 10 will ...
1 vote
1 answer
111 views

feedback on HDD speeds for a HP Proliant ML110 Gen10 server

I have a RAID 1+0 array in a HP Proliant ML110 Gen10 server with 4 x 7200RPM 2.5" 6Gbps SATA drives. The power management is set to Static High Performance Mode. I ran a CrystalDiskMark benchmark ...
1 vote
2 answers
1k views

RAID Controller -- SAS Expander -- SATA drives. What max throughput can be expected?

I am building fast recovery solution. And there is a stuck with the choosing of the RAID controller. I have a chain: 24 SATA SSD drives each performing at 4Gbit/s. Total write throughput is 96Gbit/s. ...
0 votes
1 answer
174 views

40Gbit/s RAID10 - on a single raid adapter is it possible?

I need an ultrafast backups restore for my solution. I am going to use two hosts: operating server and backup server. Both servers will be connected directly via 40Gbe PCIe 4.0 8x ethernet adapters so ...
2 votes
1 answer
5k views

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 ...
0 votes
1 answer
733 views

storcli cannot add diks to RAID10 - 255 Start Migrate not possible

list of Disks: ------------------------------------------------------------------------------------- EID:Slt DID State DG Size Intf Med SED PI SeSz Model Sp Type ---------------...
4 votes
1 answer
4k 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 ...
0 votes
1 answer
202 views

Is it best to have the OS on a separate virtual disk?

I have a server with 8 drive bays, and I have eight 4TB drives. Would it be best to do one RAID10 with all drives, or one RAID1 with two drives and then a RAID10 with the remaining six so that the ...
0 votes
1 answer
976 views

Remove Missing Drives from ZFS Pool

After an embarrassing session trying to replace a disk in my ZFS pool, I have a bunch of entries representing disks that are no longer present in the system: NAME STATE READ ...
2 votes
2 answers
86 views

RAID Recommendation Request: 2x RAID5 arrays, 1 Large RAID5, RAID10?

I just ordered a new PowerEdge R650 which will be the primary server for our company. It will run HyperV with 10 - 12 virtuals on it, mostly Windows but some Ubuntu. All the standards: domain ...
1 vote
2 answers
848 views

Redundancy of Raid 10 with a hot spare?

Raid 10 has a 2N redundancy. What is the redundancy for Raid 10 with a hot spare? Am I correct in thinking it is 2N+1 redundancy?
4 votes
1 answer
5k 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] [...
0 votes
1 answer
182 views

FAILED md RAID10, confusing output

I'm testing a RAID10 array here with mdadm. I wanted to see how many failed devices it could tolerate, rebuild times, etc. At one point I had it doing a resync on 5 or 6 devices, then I rebooted it, ...
2 votes
1 answer
289 views

Upgrading Server Storage (Single 4TB SSD, Ubuntu Server)

I am renting a server from a small company. It's a Supermicro SYS-6017R-NTF running Ubuntu Server 18.04. I am using the server to serve a website that runs on top of a 3TB database. This database is ...
1 vote
0 answers
332 views

HP server is replaced and RAID 10 started rebuilding

We've server HP Proliant DL360p Gen8 which was recently replaced with HP Proliant DL380p Gen8. Both have same P420i Raid controller. We setup RAID 10 on DL360p, 4x500GB where 1000 GB 1 Logical Drive. ...
0 votes
1 answer
106 views

Raid 10 Centos 7 failure after power cut suddenly

I have 1 server that using RAID 10 software. However, after recent power failure the server no longer can boot and stuck at grub rescue. Using ls command for all device n the server does not detect ...
1 vote
1 answer
230 views

Does Software RAID-1 Double The Writes Over The Controller/Interface?

Say I have two hard drives that max at 200 MBytes/sec writes per hard drive. Now let's say both drives are in a USB enclosure that maxes at 300 MBytes/sec writes for the entire enclosure. When ...
1 vote
1 answer
3k views

Adding disks to existing RAID array

We want to increase disk space of one of our server. Currently it has 8 physical disks(4 x 480 GB, 4 x 1.9 TB) and 3 virtual disks(RAID 1 (2 x 480GB), RAID 1 (2 x 480 GB), RAID 10(4 x 1.9TB)). We want ...
-1 votes
1 answer
1k views

Hyper-V on Server 2019 - the larger the VHDX file the slower the disk speed

We have a brand new pair of servers for Hyper-V with fast RAID 10 SSDs in 2 arrays. On the host, using Crystal Disk Mark, I get speeds that I would expect like RND64K Q32T12 = 4712.49 MB/S while the ...
1 vote
0 answers
159 views

PERC 6/i Integrated RAID-0 from degraded and unconfigured RAID-10

A 4-drive RAID10 setup was made on a PERC 6/i Integrated card. One disk failed. While waiting for a disk replacement, the controller card died. Card was replaced, but unfortunately the foreign ...
1 vote
2 answers
663 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 ...
2 votes
1 answer
344 views

fsck raid10 ext4 partition currupted, restore data

there is a volume in raid10 /dev/md3 it has a GPT partition /dev/md3p1 in ext4 with a size of 16TB. I accidentally ran fsck -y /dev/md3 causing the filesystem in /dev/md3p1 to get corrupted. fsck -b ...
0 votes
1 answer
644 views

After Reboot Ubuntu 20.04 - RAID10 goes INACTIVE

I installed RAID 10 on a fresh Ubuntu 20.04 By the Following commands: 1. mdadm --examine /dev/sdc /dev/sdd /dev/sde /dev/sdf sudo parted /dev/sdc mklabel gpt sudo parted /dev/sdd mklabel gpt sudo ...
1 vote
3 answers
4k views

Increase the size of software RAID 10

Currently I have 8 disks each of size 32G forming a RAID 10. Now, I want to increase the size of this RAID by adding extra disks. This is a production device so there is already critical data in the ...
8 votes
6 answers
16k views

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 ...
0 votes
1 answer
282 views

Increase space by growing mdadm RAID10 from 4 to 6 (and more)

I'm running Centos 7.8 with mdadm v4.1 I have 4 NVMe (3.2TB each) configured in a RAID 10, so 50% usable space (6.4TB): Personalities : [raid10] md0 : active raid10 nvme5n1p16 nvme4n1p15 nvme0n1p1[4] ...
0 votes
0 answers
420 views

mdadm RAID 10 filesystem corruption -- recoverable?

PROBLEM: I had a degraded disk in my RAID 10 array which I created using mdadm. I first removed the disk, replaced it with a new one, but when I rebuilt, I got an error saying it couldn't detect the ...
3 votes
1 answer
123 views

Setup Raid 10 for backup store

We have HP DL380p Gen8 with Smart Array P420i: 10HDDx6TB, 2 RAID10 6 and 4 HDD, for backup store via Arcserve UDP, deduplication backup configured for 16 KB blocks, we are not satisfied with the speed ...
9 votes
5 answers
6k views

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 ...
4 votes
2 answers
3k views

Optimizing ext2 filesystem for use on LVM + RAID device? Stride, stripe-width, LVM IO size considerations

I'm building a new database server and am trying to make sure I have the setup as correct as possible. The database storage is 22x 15.7k RPM Western Digital SAS drives in RAID10, in an external SAS ...
1 vote
2 answers
271 views

Why Megaraid-sas and mdadm Raid 1+0 = Raid 10 Slow actual read speeds?

One of raid cards were giving multibit ecc ram module failure , thats why I am moving 60TB of data from one server to another ... Getting 60-100 Mb/s read speeds 3 Megaraid sas raid1 s 8+8+6 x 10TB ...
1 vote
1 answer
2k 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). ...
3 votes
1 answer
902 views

Expand existing RAID1 zpool into RAID10 zpool

I'd like to expand/convert my existing RAID1 (2x 3TB mirror) zpool to RAID10 zpool by adding 2 more 3TB HDDs without losing (or moving) data stored on my existing pool. The final result will look ...

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