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Questions tagged [raid]

RAID, an acronym originally for Redundant Array of Inexpensive Disks (today usually interpreted as referred to as Redundant Array of Independent Disks), is a technology that provides increased storage performance and reliability through redundancy by spreading data across multiple disks using various algorithms (RAID-levels). RAID can be implemented in hardware storage controllers, or in software, usually as operating system/kernel features.

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27 views

HDD with SSD Cache to RAID6?

We got 8 HDDs in our server (Dell PowerEdge R730), combined as a RAID6 array. Yesterday evening one of the drives failed, so we are looking now for a replacement. I've found the Seagate Exos E 10E2400 ...
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Disk parameters for kubernetes

I'll be setting up some baremetal machines to form a k8s cluster. They each have 2 disks to be configured as RAID1, my question is what is the optimal values for stripe size, read and write policies ...
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MDADM Raid 5 stuck on “Check Status 98% Complete”

I have an ubuntu server running that works like a NVR and stores recordings from a IP Camera over the network. It worked fine for a little over a month, then today when I went to check on it, it hadn'...
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What is correct way to manage database replicas for redundency and performance?

I am running the MongoDB database on a single machine. But I want to learn how to scale it to multiple machines. MongoDB provides database sharding along with replicasets. For data redundancy, we can ...
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sas ssd in raid or nvme in storage pool

this may have been asked several times but till now I can't find a decent answer I am configuring a server for a hyper-v setup with around 5 VM look for the best solution performance and redundancy-...
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Progress for zpool import -fFX

I'm running zpool import -fFX on a 8x4TB striped, mirrored (raid10) pool. The documentation states the extreme rewind import (import -X) performs a full traversal of all blocks in the pool for ...
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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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60 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 ...
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Single-disk array full: how to add a spare disk without losing data?

So I rent this server from Hetzner and it was labeled as 2x512gb nvme ssd. Indeed, the server contains two 512 gb nvme ssd but (my fault) I noticed only later that they were in some sort of software ...
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First time using ZFS or RAID: Data Backup [migrated]

I've never used RAID before or ZFS for that matter, though I've always admired them. I've been using MX Linux for 2 years, so I'm still pretty fresh to deep Linux. My idea is for a long-term backup of ...
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174 views

mdadm RAID5 RAID6 how to check consistency on running array

On mdadm softraid 6 (about 12 disks, 60TB) there appeared accidental misswrites in large files (>100GB). All system was checked - RAM, NIC, LSI RAID card. The most suspected is the LSI because its ...
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MongoDB on NVMe in production

I'm setting up my db production environment and I have some questions. The server has two NVMe disks, but they cannot be used in the hardware RAID controller. Do I need RAID with NVMe? Would it be ...
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Create RAID1 with luks without erase disks

I need to create a RAID1 arrange with an existing phisical disk. I buyed another hdd with same size and I want to create a RAID1 arrange without erasing the first one. My disk have luks encryption, I ...
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Raid 1 default disk capacity is lesser than the disk sizes. Any ideas? Intel Raid Storage Technology - Raid from Bios

Here the screenshots I think they explains everything The disks are advertised as 1 TB and the real size of the disks are 931.5 GB I have installed windows server without raid setup for ...
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RAID recommendation for managing redundancy of 16 disks

I need advice for how to setup RAID for a server that has an array of 16 disks (boot/OS disks are outside this array). In this 16-disks array, all disks are identical (12.8TB SSDs). The ideal solution ...
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35 views

Required PSU Power for 12 HDD SATA 7200RPM (i have 20 A on my PSU peripheral channel)

I have a Tower server with today many hard drives and i would like to add hard drives for securing a raid group and also to extend storage capacity. Hardware spec before adding everything else : PSU :...
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Unknown filesystems on RAID5 partitions

I am trying to retrieve data from NAS (Acer Altos EasyStore M2) with dead mainboard. System in the NAS is based on CentOS 5 and some software from Falcon (FalconStore) is used. I removed disks from ...
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59 views

Grow mdadm raid from raid1 to raid0 with active lvm

We rented a server with two NVMe disks in a raid1 configuration with a lvm on top of that. Is it possible to change the raid level to raid0 without making any changes to the lvm config? We don't need ...
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1answer
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Dmesg is full of I/O errors on Ubuntu 18.04 VM, physical disks and host are fine

I have an Ubuntu 18.04 virtual machine on a Windows Server 2016 host (Dell PowerEdge R530, Intel Xeon E5-2620 @ 2.1GHz, 96GB RAM), running in VirtualBox 6.1.10. The host system has 2x2TB HDDs in RAID ...
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General Quesiton about where to mount a RAID VD volume, etc

We recently re-installed UBUNTU on a system that had UBUNTU system on a 500 GB RAID VD (1 slot) and DATA on another RAID VD (5 slots, RAID 5). After booting up the new system the RAID VD ...
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On a Proliant DL380 G7, how can I identify which drive in the RAID is making a clicking sound?

I have 8 drives in the Proliant G7, and when under disk load there is a clicking sound from one of them. There are NO SMART ERROR MESSAGES. It is running ESXi, which shows warnings about i/o latency ...
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Debian mount hardware RAID array

I have a Debian 10 box, that has hardware RAID capability. I have set up the two drives to be a striped RAID set through the RAID BIOS. But when I boot into the OS, They are not mounted They just ...
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50 views

Background initialization of a Virtual Disk (raid 10), can you power off completely and resume days later?

Upon setting up a new Dell Poweredge system with RAID 10, I see in System Setup --> Virtual Disk Management the Virtual Disk I created is performing a background initialization. From my ...
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Can I Replace Storage Spaces Drive With Non-identical Drive

I've set up Storage Spaces on Windows 10 Pro with two identical "2TB" drives for data redundancy. If one of those drives fails, and I can no longer purchase the exact same model, the new ...
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aacraid: Host adapter abort request followed by hung IO

I have Supermicro 4U X10DRi-T4+ 36 LFF Bay HW RAID Storage Server with two Xeon E5-2620 v3 with Adaptec ASR-71605 Running Ubuntu 20.04 server with 5.4.0-72-generic #80-Ubuntu SMP Mon Apr 12 17:35:00 ...
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Hardware RAID Level [duplicate]

I believe I may have set up wrongfully using RAID-1 instead of RAID-10. Can anyone advise from this output? [root@banjo ~]# ./lsi.sh drives Slot Number: 0 - Online, Spun Up Slot Number: 1 - Online, ...
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Recovering data from a single-disk raid1 array [closed]

I had an idea of a Raspberry Pi file server using multiple external disk drives in a RAID array. For starters I only had a single 1TB disk so I setup a raid1 array on that disk with the intent on ...
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Are My Drives Being Utilized Equally with Linux Software RAID 0 Array?

I have four NVMe drives in a RAID 0 configuration. I am attempting to determine how many IOPS the array is handling. When I run iostat, it appears that one drive is handling more IO than the other ...
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Synology, trying to bring back a failed RAID array

so I manage to destroy some of my data... I have a ds916+ and would like to recover the data from the drives, I ordered a new drive because one was failing, and another one failed during resync... so ...
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How to setup SSD's in RAID 5 on a MSA2060?

In the near future we want to replace our current MSA2050 with SAS disks to a MSA2060 with 10 SSD disks (HPE, 960GB each). We are going to use RAID 5. Since RAID 5 can go up to 16 disks, we can make 1 ...
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How do I expand my VD on LSI 9361-16i?

I've got a 9361-16I installed in a supermicro sc847. I have the 2 expanders running in a cascaded configuration with both of them chaining off port 0-4 of the card. They are being exposed as enclosure ...
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What Happens When You Write Data To Raid While It Is Scrubbing?

I have a RAID 5 setup with almost 15TB of data capacity. In the past I have let it go unchecked for too long, and found that multiple drives had SMART errors and I want to prevent bad blocks. I am ...
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symptoms of a raid controller dying?

we have a windows server running 24/7. i have been worried for quite a while, when i started taking a look at the windows event log. there i found a lot of instances of "Kernel Power Event ID 41&...
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Debian 10 install to HPE Pro liant with software raid 10

I am installing Debian 10 on server using RAID 10. I partitioned hard drives to 3 parts. I have 8 ssd drives. 32mb partition for BIOS boot 256mb ext2 partition mounted as /boot on a first drive. and ...
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Failed to start operation (initialize raid conf.) on Virtual Drive - IBM x3400 M3 (LSI M1015)

I have an IBM machine SystemX 3400 M3 with SAS controller M1015. enter image description here enter image description here I am trying to change HDD. My new HDDs areof 3Tb each and their model is the ...
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25 views

Setting up raid hardware with out deleting data

so I have a home lab, and in the beginning, I started with only 1 DISK, and in the raid config, I bypassed the raid because I didn't have 2 disks to make a RAID 10 or 1, but now, I want some ...
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PERC H740p single-disk RAID 0 versus JBOD/Pass-Through/eHBA/IT mode (For ZFS on Linux)

We have a server with PERC H740P mini (embedded) and a 2 disk RAID 1 with EXT4 for the OS (CentOS 7.8) and a 6 disk raidz2 ZFS on Linux setup for the data, all on the same controller. It's generally ...
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Getting high read await in Zabbix monitoring, is this a common behavior for RAID5 disk array?

We are running a Oracle 11.2 DB on Redhat 6.8, and disk array is configured as RAID5, which is using a Lenovo 730i RAID adapter. I checked RAID policy and found that "Read Ahead Always" and &...
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How is RAID3/4 is implemented for more than 4 drives?

I understand that, RAID 3/4 for 4 drives is: Parity Drive = D1 XOR D2 XOR D3. But what is there 5 drives or more? For example 5 or 6. How many parity drives is needed, and how XOR algorithm is working ...
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Mysterious disk activity with 3ware controller?

I recently moved one of my servers into the same room I sit in and noticed something strange. Each morning for an hour or more there is a huge burst of disk activity. I am running a 3ware 9750-4i RAID ...
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Can I use RAM as Cache for a secondary storage device

I have 10TB~ RAID 5 array and two NVME 500GB on RAID 0 and they in different systems. what I want is to make a stick of RAM like 16GB or something to act as a cache or buffer to give me faster access ...
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BTRFS and coping with disk failure

I'm finding the information for this quite difficult to come by, but it seems like an important feature of a RAID system: what happens immediately after a disk fails for BTRFS? For my hardware RAID ...
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24 views

Add disk to software raid pool

I have a setup like this there run a mirroring software raid1 but its possible to add a disk more and use its like a raid5 or how do i add more storage to the raid? Current with 2 disks | / | /var | /...
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Is my double disk failure stochastic or indicates a systemic issue?

I'm running a home server on an aging N54L Proliant Microserver. 6 months ago, it had the following disks: sda SanDisk_SDSSDP064G (64G SSD) (boot) sdb WDC_WD30EZRX (WDC Green 3TB HDD) (RAID-1) sdc ...
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Running separate RAID arrays simultaneously… is it possible?

I've just obtained my first real life server. A dell PowerEdge 2970 with 8 HDDs. I did some rudimentary studying on the Internet about RAID configurations and hopped right in. Having read that it was ...
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25 views

What is the safest RAID Type for maintain the system?

What is safest RAID Configuration to maintain the system without data loss? If you have 6 X 8TB Disk On RAID 10 it has 24TB usage spaces and 1 disk failure reserve and on RAID 6 it has 2 Disk failure ...
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1answer
65 views

How can I know if one disk faults on RAID 5?

I have 4 x 8TB configured on RAID 5, as it is if one disk faults the system can survive. But if more than 1 disk faults, the system will be destructed. How can I check if one disk is already faulted ...
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Unisphere dynamic pools. Does this mean I can lose more than 1 disk with a raid 5 configuration and 20 drives or how are spare space extents treated?

So emc has implemented dynamic pools which do away with hot spares and instead uses some drive extents as spare space on each drive. When a drive fails, the contents are copied into this spare space (...
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0answers
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E-mail reporting issue for RAID on DELL servers

On the server of one of our clients, we have a problem with the implementation of email reporting for RAID in the DELL server. I know that if such a server has an iDRAC port, such reporting can be ...
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2answers
47 views

Mixed HDD size storage system with parity

Im searching for a way to get the most out of "spare" HDDs. Following setup given: 1x 2 TB 2x 3TB 2x 6TB What i want/need is: Parity (1x HDD can fail. For example, one of the 6TB. Data ...

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