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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DL180 G6 server suddenly loses access to SSD datastore on ESXi 6.0

I've currently got a HP ProLiant DL180 G6 server. It originally came with a Smart Array P410i raid card, which I used to create a bunch of RAID0 disks (one SSD for my ESXi datastore and a couple of ...
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60 views

RAID partition cannot be mounted, not assigned partition number, after reboot

Problem: I have a CentOS 7.5 server with an array of 4x 3TB WD Reds in hardware RAID 5. The RAID volume has a single EXT4 partition on it. After a recent reboot of the server, the server can no ...
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Is it possible to reboot server from /dev/sdb while RAID 1 rebuilds /dev/sda?

I have a dedicated server with a Raid I with /dev/sda and /dev/sdb in which /dev/sda started to fail so I ordered its replacement. After the intervention the server went into rescue mode and I was not ...
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RAID 6, Microsemi Adaptec SmartRAID 3154-16i, Logical device in strange state

I've got a server with Microsemi Adaptec SmartRAID 3154-16i on which I have 12 disk RAID6 Array. There was power failure and after that one of the disks broke. One lost drive out of 12 disks is not a ...
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How to Wipe RAID Information

I understand that RAID information is stored on hard drives, rather than the RAID controller. So, if I re-use a hard drive that was in a RAID in another system, I have to delete the RAID configuration ...
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Massive ZFS write and Checksum errors dmesg reports repeatedly aborted SCSI SYNCHRONIZE CACHE(10) commands

This morning my FreeBSD 12 server started reported lots of ZFS errors in writing and checksumming. It immediately began scrubbing and resilvering but came across unrecoverable errors and stopped. ...
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What's the best open source solution to have a complete hourly-based backup system for a small-medium cluster in a datacenter? [migrated]

I'm looking for an open source solution for my small cluster of Linux servers (~20 Ubuntu-based nodes) that can provide an hourly-based (or even daily-based) backup and restore solution. I want it to ...
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Installing Inwin SK34-02 (Hotswap Bays) - Cant see drives

I am new on server fault. I purchased the following Inwin SK34-02 https://www.jw.com.au/inwin-sk34-02-3-5-hot-swap-hdd-x-4-convert-to-5-25-drive-bay-x-3 and I am attempting to install this on the ...
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Replacing hard drive in RAID 5 array on HP ProLiant DL380p Gen8 Server

I'm a relatively new (and the only) system admin at my organization. We have an HP ProLiant DL380p Gen8 Server that is no longer under any sort of support contract from HP. We're using it as a Hyper-V ...
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Recover unknown raid setup

I have 2 disks, they are the same make, model + size. Both of them have Linux RAID partitions on them. I think they used to be in a software raid1 array together, but I am hesitant to just jump in and ...
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Drives disconnected from RAID array without apparent reason

I have owned a Dell PowerEdge R720 for some time and have been using it as my personal NAS. Here is the RAID configuration (disks in the indicated order) : 2 x 146 GB disks in 15K in RAID 1 12 x 1 TB ...
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How the RAID0 write data? [duplicate]

This is the RAID0 structure: there have 3 disks, I have a question about this, when write data into disk, is it write disk A full, then write disk B? or is write a little data into disk A, then ...
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How to get status of a RAID volume on AMD (A55) RAID controller in Windows?

We have a PC used as a Windows server. There's a RAID 1 volume set up using built-in controller (AMD A55 chipset). How can we get volume status data (to use with zabbix)? My research found rcadm ...
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new LSI megaraid Sas/sata 9286CV-8e controller won't import foreign (old) disks

Had a previous controller go bad -- new controller is able to see disks, but all as Foreign , unconfigured good. There were 2 VD's, 1 in each container both arranged as RAID 10 -- 2 stripes in each ...
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Mdadm Create array on partitioned disks - failed to write metadata to disk

I'm trying to setup a raid array for a server. The array is going to be RAID 5, consisting of 4 disks, sdc, sdd, sde, sdf I need three partitions of specific sizes (2gb 200gb 700gb) and they need to ...
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28 views

Replace non-existent drive in array with unassigned drive

I have a P420 card in a Gen 8 dl360e server and I've been having some problems with my RAID 10 array. The drive in bay 1 has appeared to fail. I say appeared, because on taking the drive out and ...
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54 views

Centos server gets stuck on grub prompt

I have a server on OVH with Cpanel which has 2 x 2TB partitions and its lsblk command output looks like this. http://prntscr.com/nz4xd2 A few days back I ran some upgrades and after rebooting my ...
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HP Smart Array - Swapping drives in RAID set to upgrade

I have a HP DL360 G7, with Smart Array controller that has 2x RAID sets (RAID 10). Host OS is VMWare ESX. The 2nd RAID set has 4x 10k 600GB Midline drives that are to be upgrade to 15k 600GB ...
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Unable to mount RAID5 partition after reboot

I have ubuntu 18.04.2 based server with Software based RAID5 partition for Data. After rebooting the system. It is unable to mount automatically. When I try to mount using command "sudo mount -a". I ...
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trouble with fsck on raid - abort or not abort

I have a problem. While I was a away, a server with a 50 TB hardware raid (I think 5) apparently for some reason kicked out two drives. A collegue just put them back in by just adding them back in the ...
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What tool is available for managing the P410i raid controller?

I have a HP server with a HP P410i raid controller installed. From linux (centos 7 at the moment), how can I manage the raid controller from the OS (not from the BIOS, please)? For example, I'm ...
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Recover data from RAID 5 with VMFS data store

I own an HP Proliant Gen-6 ML350 server which is not turning on again after a power outage. According to my research it is most likely due to a failue of the power supply backplane or the power supply,...
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Adaptec RAID BIOS not showing on power on except after CMOS clear

I'm having an issue with my RAID controller. When it comes on from a complete power off, the Adaptec RAID BIOS does not show up at all (the screen where I hit Ctrl+A to configure the RAID). It usually ...
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Hybrid RAID (SDD+HDD) gives unexpected results [closed]

I am doing some experiments with hybrid RAID in Linux. My test consists of the following: 2x256GB SSD in RAID 0 (/dev/md1) 2x256GB HDD in RAID 0 (/dev/md2) Then I made md1 and md2 into a RAID 1 (/...
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Setting up XFS filesystem on software RAID 0 [duplicate]

I have a software RAID 0 set up with the details $ mdadm --detail /dev/md0 Version : 1.2 Creation Time : Mon May 20 07:56:37 2019 Raid Level : raid0 Array Size : ...
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509 views

Investigating beyond RAID for disk cluster in a server, is Dynamic Disk Pool comparable? [closed]

With the development of hyperconverged systems, we can see other technology than RAID to handle distributed storage (like ceph for example or VSAN or distributed storage like in nutanix). But is ...
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390 views

RAID 5/6 rebuild time calculation

I plan to build some storage schema but I have to anticipate downtime, maintenance and rebuild Time. Some guys said to me that a 10 disk RAID6 of 10To (SATA) rebuild will last for about a week ! ...
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72 views

HP DL360 G7 Smart Array P410i drive mix [closed]

i have HP DL360 G7 Smart Array P410i with 3xSAS HDD 146 GB in RAID5. I decided to change hard drives to SSD ones (3x180 Intel SSD). My idea was to change drives one by one and wait for RAID rebuilds. ...
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Reload of mdadm.conf live server

Is there a way how to make system to use updated mdadm.conf without reboot? I added spare group, but its not used yet - when there is a disk missing, spare is not automatically attached. I was told ...
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Understanding Disk Array Availability

I'm new to this thus I'm trying to understand about calculating Disk Array Availability (DAA). What I have understood so far is that availability is always 1, and Failure = 1÷MTBF, and that is all I ...
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Huge data loss in RAID 1 array [closed]

I've recently faced a huge data loss (everything from last 5 months) after one of my disk crashed, even if the RAID array is still fine. This disk was a SSD with my root partition (ext4), mirrored in ...
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mdadm does not show every device as active

Recently, I had to resize a linux software RAID array. It has been a little bit complex as I was forced to do many steps to grow the device size while shrinking the number of members from 14 to 6. It ...
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Minimizing the write-outage time of the database deployed on AWS EC2 [closed]

Say we have a relational database on EC2 instance. It has a set of EBS volumes in RAID mode. We perform a procedure of backing-up this instance. How to minimize the time during which we cannot write ...
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raid1 will not work when I physically remove “removed” disk in Ubuntu 18.04

/dev/sdc1 and /dev/sdd1 is raided (RAID1) into /dev/md3. /dev/md3 is encrypted with luksSetup. Last night I got DegradedArray events for /dev/sdc1. I shutdown the system, physically removed the disk,...
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Windows Server 2016 - SSD + HDD in SW RAID1. Drawbacks?

This is a weird question I realize that, but hey. So, I have an SSD in my server. It's a datacenter SSD, I guess (and hope) it will not have any issue for the next few years - as I barely put any ...
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Stubborn Foreign Disk on PERC 710 raid controller

I have a server that crashed (don't know why) and it lost access to most of its 24 drives. The server needed a full power cycle to make the disks show up again, except one disk needed a second go (was ...
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what does UNCONFIGURED BAD mean

have a few SAS ssd's, the $4000 kind {manufacturer name withheld}. I have had two now go to unconfigured bad after 1-2 hours of only powered on use, such that I am skeptical that the drive is not ...
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Unwanted md arrays created while creating SW RAID6 pool

I ran into issue where while i am creating bunch of RAID6 arrays on storage server, some unwanted random arrays were created with them for no reason. I am using old disks but i ran mdadm --zero-...
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mdadm array does not assemble correctly

After a hard reboot, my raid10 array (made of 4 disk partitions) failed to reassemble. After many trials, i attempted the "nuclear" option of zeroing the superblocks and re-creating the array with the ...
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224 views

Smart Array P420i controller replacement

I have two identical servers with Smart Array P420i One server has 4 physical drives, which form 2 logical drives (2 + 2 raid 1) Second server also has its raid configuration with two physical drives ...
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Winload.efi missing on RAID HDD

We have a workstation running Windows 8.1. At system start the error "winload.efi" missing occurs. Now I wanted to drive a system repair. The problem is that the hard disk is hanging in a software ...
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Ubuntu Not Starting Second RAID Array

Before I start let me say that I am by no means an expert with this stuff, if you see something that you would have done differently let me know. Ok, so I have a Ubuntu 18.04 server with a boot drive ...
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What's the best RAID array for fault tolerance [duplicate]

When setting up a server, I was told it needs to have really good fault tolerance. What RAID array would give me the best fault tolerance?
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77 views

How to restore or recover a Logical Drive (RAID 5) on HP Proliant DL380 G6 (Windows Server 2012 R2 Standard)?

I have shutdown the server to replace one failed SCSI HDD (Port 2i: Box 1 : Bay 7) running on RAID 5. The rebuilding for the RAID was completed successfully. However, I noticed the Logical Local Drive ...
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How to view progress in ESXi of RAID recovery using MegaCLI?

We replaced a disk in our raid 1 array and the light is green on the disk. How can we see the rebuild status? I saw this thread on the vmware community https://communities.vmware.com/thread/530391 ...
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Enabling drive write cache using Smart Storage Admin CLI

Using Smart Storage Admin, I am trying to enable DWC. Using this following command, I confirm slot0 is the only option and it is healthy. sudo /opt/smartstorageadmin/ssacli/bin/ssacli ctrl all show ...
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Drive reports as failed when attempting to assemble a RAID array created on another machine

I'm working on a script to automate the process of creating a RAID array and am currently trying to figure out how to get multiple machines to recognize the array so the data can be transferred after ...
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1answer
80 views

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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1answer
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Problems with auto-mounting MDADM-created RAID array and creating RAID device

I'm working on a script that automatically detects new drives that have been added so they can be formatted and turned into a RAID-5 array. I've been able to detect the drives and format them with ...
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1answer
36 views

I lost the RAID control drive position

I have a HP Proliant DL360 with RAID controller. I had some trouble in the power supply so I removed the 6*250 drives without positioning the drives After fixing the problem power supply I need to ...