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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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RAID60 w. LSI 9361-8i: Consistency Check repetitively finds inconsistent parity

I'm maintaining a pre-configured storage system for a project team. The storage consists of 36 x 8 TB HGST Disks (~240 TB net) in RAID60 (2x18 disks in RAID6), Controller is a MegaRAID SAS 9361-8i, OS=...
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HP MSA P2000 G3 Disk Scrubbing performance?

I have a HP P2000 G3 array with two 10Gbit iSCSI controllers in it that presents storage to my virtualisation cluster. It is soon to be expanded with two D2700 shelves each loaded with 25 10k RPM ...
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Calculating correct stripe size for Linux mdadm RAID10 arrays in “far” layout

I'm creating RAID10 array from 6 drives. When created in near layout, e.g. mdadm --create /dev/md2 --chunk=64 --level=10 --raid-devices=6 --layout=n2 /dev/sda1 ... Checking stripe size as ...
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mdadm error: found two disks with the number 0

Im running a server deep in the forest , and after a hard disco failure i got this error. error: found two disks with the number 0. It a server with 2, 1 TB disc in raid 1 with mdadm 0.9 SDA failed ...
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Windows Deployment Server Answer Files for PC's with RAID Controllers

I currently have a Windows Deployment Server running on Windows Server 2008 R2 Standard, and so far it has worked without any issues. I am able to capture and deploy images to the majority of the ...
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Are there any Triple Parity RAID cards commercially avaliable?

I am looking to setup a triple parity raid system. I was searching for a hardware triple parity RAID card to use with a SAS expander from the usual suspects, but could not find any. Are there any ...
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Do I need to trim my SSD? How?

I have been using a pair of Intel 320 in RAID 1 on my busy Ubuntu server for about 4 month. While the disk usage never reached 50% of the capacity, but I FEEL that the server has become less ...
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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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289 views

Areca Raid Controller “ARC-1883” fails when heavy network load

I have a "Areca ARC-1883IX-12" Raid Controller firmware 1.54 running OpenSuse 42.3 with XEN Hypervisor. I use four instances of a copy command to copy four big binary files within the local file ...
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68 views

Is it OK to prepare drives in mdadm RAID in LinuxMint live and then run CentOS7 installer?

I am planning to setup a CentOS7 server with software RAID. Since the CentOS7 installer isn't particularly good at preparing the disks, I wonder if it would be OK to boot up a LinuxMint 18 live, do ...
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What could go wrong with ext4 on LVM on a hardware RAID6?

Intro Recently one of my systems using ext4 on LVM on hardware RAID6 experienced a disastrous failure. To name some of the disasters: several filesystems failed beyond repair, at least one was ...
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Accidentally deleted LVM on raid partition

I accidentally deleted my LVM partition inside /dev/md1. The good thing that my linux root partition and swap inside this LVM are still mounted. I was able to copy all data to my backup HDD, and was ...
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925 views

Dealing with CONFIG FAILURE on fresh drive (3ware / LSI RAID)

This is not about DRIVE failure. It's about drive CONFIG failure. I bought 3 brand new drives for my server, because existing ones have worked for over 4 years and one of them is failing (shows ECC ...
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332 views

Create mdraid with multipath disks in in RHEL7:

I am still novice in the world of storage. I am working on a project of migrating our backups infra from Solaris to Linux. As part of that, I have rebuilt a server to Linux (RHEL7) and it has 2 root ...
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133 views

Rebuilding VHD RAID array

We have a Dell PowerEdge R420 with a PERC H710 mini RAID controller card. The server has six physical disks split over two arrays; one RAID-1 array for the OS and one RAID-10 array for the data. This ...
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528 views

Can't stop and reformat /dev/md0

I want to reformat /dev/md0, which is a RAID0 array consisting of 4 disks (sd[bcde]). However, when I tried to run the command mke2fs, I received the following error message: /dev/md0 is apparently ...
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115 views

mdadm raid1 back to single drive

I have a raid1 install of debian 7 with software mdadm on 2 disks. What I want here is to split this to 2 separate systems and be able to multiboot them. I guess while I have the system running ...
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548 views

Smartctl output varies; some RAID does not contain attributes

I have run smartctl -a on five different computers (mostly CentOS 7 Linux with smartctl 6.2), and I noticed two styles of smartctl output. Why would it change its output format? One style contains a ...
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158 views

Stress Test Hard Drive attached to a LSI controller on Hyper-V

I have a LSI 9265-8i controller running on Hyper-V. How can I stress-test the hard disks in-situ? I'd like to test things like iOPS, seek times etc.
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Dell PERC 6 - virtual drive goes offline because a drive went into the “ready” state

I have a Dell PowerEdge 2950 with four drives, and this raid controller (Dell Perc 6/i): lspci -nn RAID bus controller [0104]: LSI Logic / Symbios Logic MegaRAID SAS 1078 [1000:0060] (rev 04) ...
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618 views

Solaris 9: Degraded mirror unmanageable with raidctl after drive replacement

We have a pair of Sunfire v20z's (WITH LSI MPT raid) that have each had one drive in their mirrors die. bash-2.05# cat /etc/release Solaris 9 4/04 s9x_u6wos_08a x86 ...
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544 views

Convert single O/S disk to RAID 1 - Ubuntu 12.04 LTS

I have a server running Ubuntu 12.04 LTS with only a single drive. There are 2 more empty hot swap bays in the chassis. I want to add a little redundancy by adding a RAID 1 to the system. The ...
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254 views

Is it possible to upgrade physical disks in raid using hpacucli?

Is it possible to upgrade a RAID volume using hpacucli? For instance, i have a 4 disk Raid-10 array. If i replace each disk (of course allowing the raid to rebuild in each case), after all 4 disks ...
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raid 5 mdadm drive dropped whilst growing

I have a 4x 2tb raid 5 mdadm array which I had begun to grow onto a 5th disk. ~# mdadm --add /dev/md1 /dev/sdb ~# mdadm --grow /dev/md1 --raid-devices=5 midway through the grow I recieved this in an ...
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231 views

FreeBSD raid issue

One of my machines (FreeBSD) has lost its raid (0/ stripe). If I go [root@torry /usr/home/bclark]# gstripe list Geom name: st0 State: UP Status: Total=3, Online=3 Type: AUTOMATIC Stripesize: 65536 ...
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four-disk md raid10-far can be assembled and ran as “clean, degraded” with only 2 disks. Bug or i'm missing something?

Today i was solving raid failure on raid10-far with four disks. One disk failed and another wasn't re-added after a hard reboot. The mdadm -D was reporting it's clean and running with only two out of ...
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380 views

Is there an alternative for the Intel WebConsole for managing the RS2WG160 RAID controler on Ubuntu?

I have a server with 16 HDs connected on an Intel RS2WG160 Raid controller and I would very much like to know the state of the disks using the Web Console that Intel provides. The problem is that ...
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478 views

How do I create a RAID10 array using EBS on Amazon?

Basing this question on information I got in Why does df shows only half the size of a RAID10 array?, how should I create a RAID10 array using EBS volumes on Amazon, in a way that will not be ...
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266 views

mdadm LBA mapping

I am trying to write a script similar to mdtrim (https://github.com/Cyberax/mdtrim) for a raid 0 software raid through mdadm. The mdtrim is for raid 1 only at the moment, and it works by writing a ...
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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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111 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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106 views

See Pike raid status in ESXi 6.7

I am using ESXi 6.7 and have an Asus Pike 3108 card in the server. When I browse the Host | Monitor | Hardware | Storage I can see: Avago (LSI) MegaRAID SAS Invader Controller #0 But the status is ...
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Debian - software RAID 1 in UEFI mode

I am a beginner in UEFI, so excuse me if this question is vey simple. I have two 3 TB disks and want to install Debian 9.4 with RAID1 in UEFI mode.After reading all the information I am thinking about ...
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Replacing hard drive that has partitions in both RAID 1 and RAID 0, and also contains /boot/ partition

I have inherited a system (Fedora 26) with the following setup: software RAID 1 (md127) between two disks (sda2 and sdb4 for lvm holding fedora-root and fedora-home). Additionally there's a RAID 0 (...
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Debian Jessie RAID recovery mount LVM2

I recovered a failed array, which has an LVM2 on it, how do I mount it? Here's what I've done: lvmdiskscan /dev/md0 /dev/loop0 [ 873.62 MiB] /dev/md0 [ 7.28 TiB] LVM physical volume /dev/...
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Mount Raid 5 to Ganeti VM

I am running a one node Ganeti Server Supermicro MBD-X10SDV-6C+-TLN4F-O with Intel Xeon D-1528 and 32 GB Ram I have the following setup: OS Ubuntu 16.04.2 2X 250GB SSD's in Raid 1 -> ext4 partition ...
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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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21 views

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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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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382 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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38 views

Expand existing data partition of raid volume to max volume size w/o data loss

I'm using an Areca ARC-1220 raid controller with 8x4TB HDDs (RAID-6). Initially, I had 2 volumes (à 12 TB, all data). My plan was to merge both volumes into one single volume. I deleted volume 2 (...
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Removing failed Raid0 volume from CentOSv6 boot sequence

I need help. To date the majority of my Linux 'software RAID' use has been done via the Graphical Installer. Now, one of the drives comprising my RAID-0 volume has failed and at boot, the system ...
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Saving a 3ware RAID configuration for later use?

I have a 3ware-based (using tw_cli) 24-bay array filled with 2 TB hard drives, used for backup. The plan is to upgrade them to substantially larger drives, but I would like to remove the 2 TB drives ...
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324 views

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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103 views

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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195 views

How to know which one the system is using: Software RAID or Hardware RAID or BIOS RAID

It's a xw6600 HP workstation running with CentOS 7 and RAID1. I have to replace the current 2TB array with 6TB array. I'd like to know, once the replacement's done, how can we manage the array, ...
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147 views

mdadm/ext4 chunk size on raid 1

Sorry for my noob question. I have a raid 1 system on mdadm in Debian, with the resulting partition formatted as ext4. Looking at the resulting share in Windows, it reports: Size: 618GB Size on disk:...
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101 views

Raid - Software, Hardware, or none at all ( CENTOS )

I took over an old centos machine and I cannot figure out for the life of me if the server has a raid setup or not. It has 2 Harddrives ( one of which is now red lighting on the bay ). There are two ...
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394 views

Raid 6 or Raid 10 or Both + Hypervisor / VM's + Storage Config

I guess this is a multiple answer question, but looking on the web didn't find this kind of mind set. I have a server (HP ProLiant DL380 Gen9) with 6 x 1,2 Tb SAS 10k (have 2 spares disks), and a ...
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95 views

Raid 5 Failed drive with HS rebuilding

I have a Raid 5 setup with 3 drives and a hot spare drive. Hot spare Rebuilding - Very slow Drive one healthy Drive two healthy Drive three failed Backups are failing on the raid. My question is ...