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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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How can I debug a slow (software) RAID 10 array?

I have a software RAID 10 array setup using mdadm. There are 8 separate disks. Both read and write speeds are extremely slow, especially writes. Any large (multi-GB) file added to the filesystem is ...
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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" ...
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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 ...
Moustafa's user avatar
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3 answers
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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 ...
Co de Klopper's user avatar
2 votes
1 answer
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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 ...
James's user avatar
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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. ...
Parth Sawant's user avatar
2 votes
1 answer
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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, ...
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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 ...
user2395126's user avatar
7 votes
2 answers
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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, ...
G1R0UARD's user avatar
2 votes
2 answers
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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 ...
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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 ...
TylerDurden's user avatar
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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 ...
Roberto Iglesias's user avatar
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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 ...
gchq's user avatar
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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 ...
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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 ...
Lucas Castro's user avatar
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1 answer
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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 ...
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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. ...
Mitchel's user avatar
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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 ...
Mitchel's user avatar
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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 ---------------...
helpmenicely's user avatar
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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 ...
Kyle Souza's user avatar
2 votes
2 answers
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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 ...
ADY's user avatar
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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 ...
Danny Roberts's user avatar
1 vote
2 answers
964 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?
Vincent's user avatar
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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, ...
clarknova's user avatar
2 votes
1 answer
303 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 ...
inersha's user avatar
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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. ...
adeel's user avatar
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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 ...
Alias Harun's user avatar
1 vote
2 answers
961 views

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 ...
Crash Override's user avatar
1 vote
1 answer
260 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 ...
Crash Override's user avatar
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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 ...
D_B_AINT's user avatar
1 vote
0 answers
176 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 ...
Patrice Levesque's user avatar
2 votes
1 answer
347 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 ...
user607743's user avatar
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1 answer
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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 ...
Mitra's user avatar
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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] ...
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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 ...
user3787902's user avatar
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 ...
mgkmgk's user avatar
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2 answers
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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 ...
Gediz GÜRSU's user avatar
3 votes
1 answer
1k 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 ...
MrQ's user avatar
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LSI HostRAID 2008 - Can't Create RAID 10 With More Than 10 Drives

I've got a Quanta Stratos server with an LSI HostRaid 2008 controller. I've got 24 SAS drives in it. No matter what I do I cannot get configure RAID 10 across all 24 drives. I've no experience with ...
Michael's user avatar
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763 views

Very Low IOPs on Array of 16x 15K SAS Drives

I'm having issues with one of our servers that is running 16x 900GB 15K SAS drives in a RAID 1+0 Array on a PERC H710P, under normal load its doing ~450 IOPs (almost all writes) and has a backlog of ~...
philliplcg's user avatar
1 vote
1 answer
2k views

Rebuild Linux Software Raid 10 Adding Replacement Disk

I have a CentOS 6.10 Server with 4 x 2TB Drives. One was failing (bad sectors and causing major disk IO bottlenecks). This is a headless server in a remote data center. Technician is going to replace ...
Marc Pope's user avatar
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Storcli - migrate from RAID1 to RAID10

I have a system with two hard drives set up in RAID1. I've purchased another two - same model/size etc. - and now I want to reconfigure them to RAID10. I have storcli installed in VMWare and is ...
MarkoA's user avatar
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1 answer
755 views

RAID - What happens if I import foreign configuration from newly inserted disk into an exisitng raid

Does the existing RAID fail if I import the foreign configuration from newly insert disk? Say I have a RAID 10 with 4 drives and I insert the 5th drive and its in Foreign state. Does it destroy my ...
user630702's user avatar
0 votes
1 answer
3k 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 ...
user630702's user avatar
1 vote
2 answers
6k views

RAID 50 vs RAID 10 for performance?

I have a server with 6 SSD's and a raid controller card that supports both RAID 10 and RAID 50 the plan is to use this as our Build server. It will be pulling in NPM Packages and many small code files,...
Paul Smith's user avatar
0 votes
4 answers
869 views

What a benefit of RAID 1,5,10 vs every night simple diff backup

Given: 2 HDD in RAID and case when we lose 1 of them after 3 years: If we use RAID 0, we lost data If we use RAID 1, we have a copy on possible also bad-health disk, any restore may cause failure ...
alexloiko's user avatar
0 votes
3 answers
205 views

Hardware Raid 1 vs Raid 10

What are the advantages/disadvantages of raid 1+0 vs raid 1 regarding the following: Recoverability. How easy is it to recover data from a raid 1+0 array if the raid array controller fails and you ...
maloo's user avatar
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1 vote
1 answer
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HP ProLiant ML110 G7 Difficulty Loading OpenSUSE Leap [closed]

I am having a problem with the HP Proliant ML110 G7. I am trying to load OPenSUSE Leap. I go through the whole installation. It is supposed to detect and load all drivers required. The ML100 G7 has ...
Paco's user avatar
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2 votes
2 answers
2k views

RAID 10 Single drive is showing up as multiple drives in Windows Server 2016

I installed a Windows Server 2016 in a physical server with RAID 10 (LSI card), whose configuration is shown below: Even though the RAID configuration shows one 3.725 TB drive, this shows up as 2 ...
Miguel Mesquita Alfaiate's user avatar
0 votes
1 answer
67 views

Backup volume and Data on the same raid array?

I have to setup a server with three VMs. It must also act as first backup storage location. The server is equipped with 8x1,8TB HDDs. I'm not sure if it's a good choice to have one big raid10 with ...
lu_luca's user avatar

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