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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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Mounting a 2nd RAID drive (SuperMicro/CentOS)

I have a SuperMicro server and it has two (2) 500G drives and eight (8) 1TB drives. So what I've done is made the two (2) 500G drives into a Raid 1 and CentOS v7 was installed on it. I then setup ...
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Auto-assemble RAID1 Array with mdadm on CentOS 7.6

I'm new to this particular area of the Stack Exchange network so please be kind. We are experiencing issues with auto-assembling a RAID1 Array created with mdadm on CentOS 7.6, and no matter what we ...
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RAID - strip setting 128KB/512KB/1MB - video stream storage

Iam building video storage server for IPTV usage and iam wondering about setting of RAID strip. Its going to be large storage, RAID60 (RAID6 - 6x3TB / RAID0 - 3xRAID6) so its around 30TB each volume. ...
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Best configuration for a software RAID 10 SSD for VM xenserver [on hold]

I have xenserver servers. For storage of virtual machines, I use the software RAID 10 (the disks are directly in the servers). I would like to know the best configuration for 4 SSD disk in RAID 10 ...
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How to mount Apple RAID on Debian server?

I have two Samsung ssd's in a RAID 0 configuration. It was made with Disk Utility on macos Mojave. I would like to mount them on a Debian server but I can not figure out how or if it is possible at ...
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RAID1 vs RAID5: read performances of a 2-disks array

I'm testing some RAID setups built with mdadm. This is about parallel reads on a 2-disks array. RAID1 seems to balance the reads by process, some sort of coarse-grained balancing, so reading the ...
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19 views

one more Raid 1 conflagration on Centos

i have Centos server ,and there is already RAID 1 configured with two Hard drive each of them is 1TB ,i want to add two more Hard drive each of them is also 1TB and configure with RAID 1 ,,please let ...
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Disk State is “failed” on RAID card

So I have a brand new SAS disk that I'm putting into a system with an unconfigured raid card. The disk is showing in a Failed state. The disk is brand new never been used before. I am pretty new to ...
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RAID - Totally replace an old, semi-dying disk, or add another and wait for it to die completely?

I've currently got a 3 Hard Disk Linux Software RAID5 volume (mdadm). At least one disk is probably dying - long spin up times, and I've heard the click of death coming for a little while. I've ...
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55 views

Raid 0 disk outside

by mistake I run a fdisk /dev/sdb and then w to a raid 0 member, I see a message like the disk is now outside the raid but I ignored that and keep working on the machine. Then I make a reboot and pfff ...
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How to add disks to existing RAID-6

I'd like to double the size of an existing RAID-6. It currently contains 12 disks and I added 12 more. When I go through the IDRAC interface, I can only see options to add them as global hotspare. I ...
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HP DL380 G6 and P-408i Compatibility?

Does anybody know if these two are compatible? I installed a new 408i in our DL380 G6 and the BIOS identifies the 408i as simply "other mass storage controller". BIOS/other firmware upgrade? ...
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Bandwidth and IO issues when running hardware raid and zfs

I've inherited a setup using Linux Ubuntu 14, a megaraid_sas, and ZFS. We're getting some performance problems (never being able to fully utilize the 6GB bandwidth from the raid) and I'm curious if ...
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Which RAID level for virtual machines in SAN

I have Dell EqualLogic PS5000E iSCSI Array. I have connected this SAN in servers directly. I used Jumbo Frames. In this case, everything is ok. My storage is ~25TB. Now, I need to choose, which RAID ...
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How do I get rid of this SATARaid screen on boot?

I have a server with a SuperMicro X8SIL-V motherboard. Here's the manual. Every time it boots, it spends about three minutes at this screen: Sil 3124 SATARaid BIOS Version 6.3.18 Copyright (C) 1997-...
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2answers
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Two hard drives each with software RAID1 on CentOS 7?

Disclaimer: I did not create this server. From what I see below, it seems as if I have two identical drives, /dev/sda and /dev/sdb, and each one has its own software RAID1. Am I completely reading ...
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Finding SMART status of SATA disks in HP SmartArray

I'm trying to find SMART params of the disks in my array, it seems that simple way does not work: % smartctl -d sat --all /dev/sg0 -H smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.9.0-8-amd64] (local ...
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SAS 9361-4i - One drive stuck in UB state

Just got a new SuperMicro box in the rack. 1U and four drives The RAID control is set to RAID 10 - booted it up and two drives showed as failed. Reset both of them and it ran a rebuild. One drive ...
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Failed 2008 server with Raid Controller

I have a customer who called us with a failed server. I believe the issue is either the motherboard or the power supply (This happened after a power outage). The server is an old 2008 server which ...
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System slowdown by RAID controller fading away?

May system runs on a RAID 5 on a RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05) Since about a week the system becomes very slow. I get messages on the commant ...
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replace RAID controller and keep raid5 configuration

On my system I want to replace my RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05) with a PERC H310. Will it be possible to import the existing RAID5 ...
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RAID: Comparision of load on disks while expanding disk space or upgrading RAID level

I have an Areca ARC-1880IX-24 RAID Controller (FW 1.51) with several different Seagate 3TB disks (SAS and SATA, and of different age) attached to it to form a RAID5. When I tried to expand it by two ...
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How wide (data + parity) would you go for erasure coded pools / raid 6?

I am currently doing k=8 and m=2 or in other words data = 8 + parity = 2 shards I am using an all hdd ceph cluster. I have thought about going data = 11 + parity = 2 which would save a lot of ...
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mdadm - Drive has incorrect type after reboot

I have a raid 6 setup with six drives using mdadm. I noticed I had a failed drive (b) that was not responding at all. Making sure all drives are properly connected I stopped the raid, unmounted and ...
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41 views

10k hot spare disk for 15k RAID 10?

I ordered a Dell PowerEdge R640 together with 4x 600GB 15k SAS harddisks with the intention to create a RAID 10. To my surprise, the system already had a 600GB harddisk in, which is only 10k rpm ...
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Disk change corrupted volume - MegaCLI

I recently changed disk on one of our servers using MegaCLI, it actually uses Dell controller with perccli utility, but it has some issues and this swap could not be done with it. At one point, i ...
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141 views

Upgrade windows server HDD without losing any data in RAID1

I have a Windows Server 2012 R2 installed on a system with RAID1 setup which has several services running like Active Directory, etc.. It has 500 GB hard disk as of now. Now we want to upgrade the ...
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151 views

NVME vs SSD: Read/Write performance issue

We have rent some servers from Hetzner.de. A few of them have NVMe hard disks while the others have SSDs. We becnchmarked the read/write performance on 4 of our servers using the following commands: ...
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1answer
48 views

Terramaster NAS f4-220 Refuses to connect to anything

I purchased a Terramaster f4-220 and put it into a RAID 5 configuration. All was working until one of the disks indicated there was an issue (red light on the physical machine). I swapped the disk, ...
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Raid 10 failed controller data recovery

I have an old Supermicro server used for dev environment. After I've encountered a power outage the server failed to start: cpu fans were spinning, but I had no video signal, keyboard had no power, ...
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1answer
71 views

VM transfer speed between XCP-ng (XEN) servers

I have two HP DL380 G8 servers with 4x 1TB on HP p420 RAID controllers in RAID 1+0 setup. Eth0s are connected to the router, and Eth3&Eth4s are bonded (LACP) and connected directly between ...
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91 views

Unable to mount a RAID 5 volume

Evening all, Total n00b when it comes to Linux, I use Xpenology (Synology) as NAS software and following a faulty SATA cable lost my RAID 5 volume - within the OS it's sat in a crashed state. ...
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1answer
79 views

Recover from a clean, degraded RAID-5

Good morning all, I have some NAS software which - for the most part - works great, but when something happens to the Hyper-V host it often fails spectacularly. Today is one of those days. I'm not ...
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42 views

RAID50 slow write speed

Initial Configuration: RAID: Disk Drives: 6 HDD TOSHIBA MBF2600RC (600 Gb, 16 Mb, 10025 RPM, SAS, 600 Mb/s) 2 Spans Motherboard: SuperMicro X8DTU-6F+/6TF RAID Controller: SuperMicro SMC2108 Virtual ...
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57 views

How is data transferred over RAID Controller?

in my server I have PCI RAID Controller PERC 6i, it has two cables connected to SAS Backplane. one is mentioned with CTRL 1 (connected to J_SAS_A), and the other CTRL 0 (connected to J_SAS_B). The ...
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1answer
64 views

Which type of failures I could face with ZFS over multiple RAID-0 drives?

I'm building Proxmox VE on Dell R820, as a Perc H710 card does not support path-through or JBOD modes. I've made a division to enable RAID-0 on 14x 1.0TB SAS drives for zfs storage and RAID-1 of 2x ...
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1answer
35 views

Tests with smartctl vs smartd

I am looking into setting up smartmontools. I'd like to control when the tests run. I was thinking of running: /usr/sbin/smartctl --test=short /dev/sdX (every week) /usr/sbin/smartctl --test=long /...
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1answer
29 views

transfer raid 0 array from freenas to windows

I have three disks in raid 0 with some data on it (not mission critical). This pool was created on a freenas installation and I was wondering if there is a way to re-mount the same raid 0 array in ...
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1answer
67 views

Intel Optane 900P SSD - Windows Raid

Currently am trying to upgrade an iSCSI shared storage server for a SQL Server cluster (server is running Windows Server 2012, I plan on upgrading that at a later time). After looking at where to get ...
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1answer
36 views

MegaRAID SAS 2108 - Can I use different drives for the same array

I know you can in general use different drive manufactures and size in general but does anyone know if the MegaRAID SAS 2108 card will let me do RAID 5 with multiple drives that are not the same in ...
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56 views

Software RAID missing after replacing motherboard - how to restore?

I had a perfectly good software raid (md0) on my Linux Mint 19 installation. I replaced the motherboard, using the exact same drives as before. However, now the RAID doesn't exist and won't assemble....
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1answer
42 views

Can ZFS mirror a single disk pool automatically? [closed]

I'm getting ready to add another server to my home network. I currently have one storage drive for it. I want to add another one to mirror the first drive, but can't purchase the second drive for a ...
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RAID : Why does out of sync happens?

I have a system running Software RAID 10 with 4 drives (only one partition is using RAID from those disks). The system, which is running Ubuntu 14.04, was unable to boot. Troubleshooting the problem, ...
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1answer
107 views

Windows encrypted software raid

Is it possible to have (preferrably with Windows-on-board tools of Windows Server 2012 R2 and Windows Server 2016) to have a software raid mirror on 2 encrypted disks? (Locally preferred.) From what ...
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1answer
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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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1answer
45 views

HP server with failed disk in hardware RAID 5, how to replace (have same-spec disk)?

My system Admin suddenly took an emergency leave and I am not so good in system administration. Seeking your help. I have a HP server running VMware. The server contain Hardware Raid 5 with three SAS ...
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2answers
186 views

How to Migrate from Raid 0 to Raid 5. Dell Server t430

I have a Dell PowerEdge T430 Server with Windows Server 2016. The point is that now it's configured as a raid 0, and the client wants to change it to a Raid 5. I am afraid as if changing this could ...
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1answer
171 views

HP dl360p G8 writes/latency with SSDs in raid very poor

I have a DL360P g8 server with a HPE p420i raid controller (2gb cache). We have noticed that writes to the SSDs via raid are incredibly slow. The drives in question I have in the arrays are: Volume 1 ...
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85 views

ZFS Faulted Pool Corrupted Data, resilver completed, incorrect paths, io error

I recently encountered a disk failure, for which I got a replacement disk, and successfully replaced the disk as well as completed the resilvering process. I was able to use the raidz2 without issues ...
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Btrfs Raid10 Two drives have failed. What are my options?

Here's my story: I noticed read errors on one of my four RAID10 Btrfs drives (/dev/sde). This occurred when I was attempting a backup using btrfs send/receive. I bought a new hard drive of the same ...