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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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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 ...
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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 ...
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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 ...
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HPE SSD Slow performance

We are facing a extremely slow server. We are using SSD RAID 6 but cannot seem to find the cause why. After doing some research, it appears something related to the RAID and SSD. Server is HPE Gen 9 ...
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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?
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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, ...
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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Megacli R10 fails with invalid arguments

Can anyone please help here? I have 6 disks and trying to do R10. Enc ID is 252 and Physical disk slots are 0-5. I'm getting invalid arguments error but am not sure what is missing. root@xyz:~# ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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1 answer
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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 ...
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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 ...
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1 answer
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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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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 ...
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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 ~...
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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 ...
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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 ...
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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 ...
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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 ...
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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,...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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1 vote
1 answer
2k 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 ...
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6 Samsung 860 EVO SSDs running RAID-10 with an LSI-9260 controller TBW

I am getting ready to implement a RAID-10 config with 6 Samsung 860 EVO 500gb SSDs. They will be attached to an LSI 9260-8i controller. The specs for the SSDs lifespan read 300TBW. Q1 - Can ...
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New RAID10 4x 12TB array, long resync time

I just got a CENTOS new machine setup. It has 2x SSD drives for linux, and 4x 12TB SAS drives for extra storage. I setup a software RAID10 array on the 4x 12TB drives, file system ext4. Obviously it ...
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ZFS Recover from 2 dead drives on Raidz1-0

I've got a ZFS pool I'm trying to import to a new install, and I have what looks like 2 dead drives out of 4. Considering I have no back up (I know, this array was my backups) is there a chance of ...
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2 Volume RAID 10 on a single RAID controller

Motherboards Supermicro X10DRH-CT Onboard Raid Broadcom Mega Raid SLI 3108, Motherboard has 2 mini SAS port for an other 4 SAS Drives. Question, Can I create Second Raid 10 Volume without interfering ...
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1 answer
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RAID 10 Configured in Smart Array Administrator but after install centos 7 show all disks

I have an HP ProLiant DL320e Gen8 with 4 disks. I have configured the disks as a single RAID10 array in the HP Smart Array Administrator. After configuring Smart Array Administrator I can see 1 ...
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3 votes
1 answer
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RAID 10 Configuration Settings with different disks

I have just started configuring a server with 4 SSD drives. Each drive pair has the same capacity, but not the same throughout the 4 disks. I want to use RAID 10, and I have tried different ...
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1 answer
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How to recover from drive failure on lvm software raid 10 in Linux?

Below is how I created lvm software raid10. Create Physical Volumes pvcreate /dev/nvme0n1 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1 Create Volume Group vgcreate my_vol_grp /dev/nvme0n1 /dev/nvme1n1 /...
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3 votes
1 answer
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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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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 ...
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1 answer
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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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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 ...
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9 votes
1 answer
1k 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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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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1 answer
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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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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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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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