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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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 ...
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Proware SB-2124-G1A3 password reset

We have been using the Proware SB-2124-G1A3 device for more than 10 years. But now we have discovered that the administrator password is irretrievably lost. The official documentation describes ...
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Operation not allowed when running `sudo storcli /c0 /e252 /s1 set good`

I have a server with a LSI card running with RAID5. Recently the card sounded an alarm and it seems there is a problem with one of the drives. ----------------------------------------------------------...
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Is it possible to create a backup RAID 5 on a nas by replacing 1 drive at a time? [closed]

During a recent office relocation my QNAP TS-509 (RAID 5 with 4 2tb WD Red) wouldn't boot properly and fooling around trying to correct that I lost the volume. As I was expanding my very limited ...
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Optimise Write performance on a RAID array of SSD [duplicate]

We've 8 Samsung 970 Pro 1Tb drives (PCI3) in a HighPoint NVMe RAID Controller, which I want to optimise for write performance at the cost of any other consideration. All of our files will be around ...
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RAID + how to manipulate the disk size with RAID controller

We have 3 Hadoop HDFS servers on DELL HW physical machines , when all servers are with RHEL 7.2 version Each server include 3 HDFS disks when each disk is 1TB Now we want to do add another 3 Hadoop ...
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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 ---------------...
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Windows 10 RAID - Readable from Linux? [migrated]

I've got a Win 10 machine whose hard drive (actually an M.2) is listed as RAID in the UEFI. When booting from a Ubuntu 22.04 USB, the hard drive is not detected. Is there any way linux can read this?...
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Dell PowerEdge R410: Format SAS NetApp drives to 512B sector size for use in RAID

Thanks for helping out. Some time ago I got two 400GB NetApp drives for use in my Poweredge server. I attempted for a while to get them to work but they would not join a RAID disk group. I found this ...
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15 votes
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Unable to mount an XFS filesystem from Linux RAID6 array ("Log inconsistent")

First time poster - my apologies if I don't get the etiquette correct. I have a ~200TB RAID6 array with 30 disks and I'm unable to mount it - I just get the message: mount /dev/md125 /export/models ...
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Raid 5 with hot spare (17+1) somehow became Raid 5 without hot spare (18 + 0)? (Dell Poweredge T640)

So recently we have been having strange RAID storage server issues. The most recent issue I have no idea what could be going on. config is Raid 5; 17 + 1 (17 disk volume + 1 dedicated hot spare) A ...
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RAID5 compatability: zeroed superblock: WD Red 8TB drives: wd80efax-68LHPN0 and 2x 68KNBN0

Summarizing the problem: I have been scraping by with JBOD for years, but finally need a real 'micro data center'. I bought 3 drives for my centos8-stream box over a couple months, but I have heard it ...
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RAID10 Performance on newer hardware slower then RAID5 performance on older hardware?

I am currently trying to figure out a performance issue with a new server compared to a old server. Performance should be better but it's not and I'm having trouble figuring out why. Old server is a ...
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btrfs - remove drive from raid array

I have 4 (3TB) drives used for backups inside my PC case I want to migrate to a NAS bay. I was wondering if the drives could be migrated over one at a time by disabling RAID. Here is the output from ...
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Errors on a zpool filesystem

I'm using ZFS on a Debian 9 machine. This machine has been working for years without any problem until today. The zfs pool is mounted on top of a RAID system, controlled by hardware (so only one drive ...
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Unable to rebuild the Raid 1 Array (intel RST Raid 1) in BIOS and in OS(Ubuntu server 20.04.4)

we have HP server HP ProLiant ML10 Gen 9 with Ubuntu 20.04.4 LTS. We have enabled Raid 1 array for two HDD sized 2TB using Intel RST Raid configuration (which is an fake/firmware raid). Now my goal is ...
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What's the safest way to swap an SSD (RAID 10)?

I have machines (4x 2 TB SSDs, Hardware RAID 10 via LSI 9265-8i cards) and occasionally need to swap an SSD - for example if it fails. I'm curious to hear what people consider to be the safest ...
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Cannot recognize hdd's on Lenovo Thinksystem SR650 Gen 2 7x06

I have installed ubuntu 21.10 on my system. I have 2 5tb hdds and one 1tb stick (for OS). I have a 430-8i non-raid controller. When I run df-h, the system only recognizes OS drives and the usb 1tb ...
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Using a RAID Controller as Pass-thru vs RAID0

I have a server with DellPerc H750 Storage controller. I want to use the controller as Pass-thru/Non-RAID but I have the below questions: A) Is it possible in the future to replace the controller ...
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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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Software RAID Options Combining Internal SATA & External USB?

BACKGROUND I currently use a hybrid server-workstation setup for my primary workstation. Basically, just a Fedora base running Linux KVM, on which I then containerize a couple Linux flavors & a ...
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Bitlocker Encryption on RAID 0 kicks drive out of array half-way through

After hunting around for answers, I found some for the question: "Does Bitlocker support RAID on Windows". The answer seems to be that hardware RAID is supported. I've got a RAID 0 drive ...
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Supermicro backplane diagnostics

I have three supermicro servers, 2x 3U chassis with X8DTE motherboard and SAS-836TQ backplanes and 1x 1U chassis with X9DRW-iF with SAS-815TQ backplane. 1 of the 3U backplanes only recognizes 12 out ...
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So...an LSI SAS9211-8I, ARECA AR-1882IX-12 and some 12TB Hitachis walk into a bar

By the title of this I hope it's obvious that I'm trying to console myself with humor after the idiotic mistake I made last night. And I'm hoping that someone out might be able to verify a few things ...
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15 votes
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What's the difference between a "degraded" RAID 6 array and a "clean" RAID 5 array?

Suppose you have two RAID arrays, one with N disks and one with N+1 disks. The array with N disks was formatted as a RAID 5 and left alone, while the other array was formatted as a RAID 6 before one ...
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DegradedArray Event Detected - U_ but only one drive listed

I got this email from the dedicated server hosting company: A DegradedArray event had been detected on md device /dev/md/0. The /proc/mdstat file currently contains the following: Personalities : [...
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LSI 9265-8i - can J2B's be set to RAID mode and IT mode for passthru?

I have an LSI 9265-81. Can one J2B connector be set to RAID mode and the other set to IT mode for passthru? Can any of the LSI 8i's be set that way?
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LVM with uneven proportional "stripe" distribution over 2 disks of different sizes

Is there a way to create a "striped" LV in a VG with 2 disks of different sizes in such a way it utilizes 100% of the available space? Linear LV would work, but I want to have the load ...
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Combining Mix Use (MU) and Read Intensive (RI) SSD in same Raid array

I know you cannot combine mixed drive types in an array eg. SAS/SATA or SSD/HDD. What about identically sized SATA SSD in the MU and RI options? RAID-5: 4x P18434-B21 - HPE 960GB SATA MU SFF SC MV SSD ...
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mdstat mismatch cnt unsynchronized blocks

Both of our servers suffer from mdstat mismatch cnt unsynchronized blocks Every start of the month we got this error and we have to repair the raid using echo 'repair' >/sys/block/<md id>/md/...
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how does a striped RAID work with large number of disks?

still trying to configure my large (24) array of disks (2.4TB) for an archive/nas of mixed huge and small files. But apart from this, I am now more focused to understand how striped RAIDs work under ...
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Bad I/O performance using software raid 1 on my Linux machine

I am using Ubuntu 20.04 LTS, Kernel 5.8.0-55 and have my filesystem on a md/software RAID1 consisting of two SATA hard disks as my home server system. 32 GB RAM, 4 cores (Intel Core i5-3450). It has ...
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What is the best way to clone a set of software RAID 1 disks?

Here's the thing: One of my friends has a server with software RAID-1 with a set of two disks. The task at hand is simple: clone the disks into another set of two empty disks. He is running CentOS, I ...
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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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RAID performance with 10xSSD on an HP P420i [closed]

I am planning to use 10x 8TB Samsung 870 QVO SATA III 2.5" SSD in an HP DL360 G8 server that uses P420i smart array controller. Each SSD has a max of 530 MBs speed in sequential reads. ...
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Dell PERC H750 compatibility with Debian

I've been using Debian on Dell servers for many years. For a long time I've been using the PERC H730P RAID controller, which is well supported by utilities like MegaCLI. Recently I've bought a R440 ...
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HP ProLiant DL380p Gen8 raid swap

We have a HP ProLiant DL380p Gen8 which boots vmware and loads 3 windows virtual servers. We started getting cyclic redundancy erros during backup and then one of the raid drives started showing red ...
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HP SAS SSD drives are locked?

I have 2 HP SAS SSD drives I acquired as part of a bulk purchase of parts. One is HPE Model: DOPE1920S5xnNMRI and the other is HPE Model:ARFX1920S5xnMTRI I have 6 servers here with Raid Controllers. ...
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HPACUCLI shows logical drives not available. How to fix it?

since I need to copy some data from an old HP DL380 server, I decided to power on it after a long time. Unfortunately, I can't mount the RAID5 logical volume that is containing the data I need. So, in ...
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How to restore RAID1 configuration with 2 different HardDrives in CentOS-7

We have a server (HP ProLiant ML10 Gen 9) that came with Two Identical Hard disks. It was assumed that the server supports hardware RAID 1 (Mirror), and the CentOS-7 was installed in it. But later we ...
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Will a RAID controller pass on flush commands when controller's cache is in write-through mode?

When the controller's battery-backed write cache is disabled, but the drive's write caches are enabled, will the controller pass on the flush commands from the OS to the drives (all physical drives in ...
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Partition RAID or multiple RAIDs per partitions

I'm trying to setup a RAID 1 with two HDDs. This is what I'm trying to achieve: data partition (ext4) Mac TimeMachine backup partition (HFS+) I want to have RAID over both partitions, but I still ...
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Optimal configuration for a RAID + ZFS

What would be the optimal configuration for a server using raid and where I want to place ZFS only? I heard that while using ZFS would be better not to use at all the raid controller , is it correct?
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How to script finding which physical disk belongs to which virtual disk in a RAID confiuration

I need to write a script to find the firmware versions of physical disks in a RAID configuration, if a physical disk is a specific firmware version then I need to unmount the corresponding virtual ...
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1 vote
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Raid Array with only a Partition of some Disks

I was wondering if one could set up a RAID-5 array such that only some space of the third disk is used in the raid array and the left over space can be used as a non-raid volume. I have three HDDs ...
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RAID controller detecting SSD as foreign after every reboot

My server, an R610, has been detecting my SSD as foreign after every reboot. It has a PERC 6/i RAID controller, but there's no actual RAID stuff (I just have all the drives as their own VDs). This had ...
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3 votes
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Raid 10 Performance Issues

I am in the process of setting up a mirrored storage system for our Business. We don't have the budget for prebuilds so I am trying to do what I can to get the best bang for our buck. Here is our ...
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How do I set up a JBOD device on Ubuntu using a SAS card

I am running Ubuntu 20.04 LTS server. I have installed a SAS PCI card I purchased from Amazon. The card is active and detected (lspci shows the device). I have installed the appropriate drivers from ...
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lvm recovery with raid reconfiguration

I have a Dell R510 with a H200 controller previously and I have two disks: a 2T SAS and a 250G SSD. I created two raid0s using those two disks on H200 and then created lvm on top of it. Here is my ...
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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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