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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mdadm fails to automount array with dependencies to other arrays and external bitmap

My setup is a bit atypical in order to reuse some old disks (I'm aware of the performance disadvantages but I don't want to throw away fine disks). It's a raid5 of two 6T disks, a raid0 of 2x3T disks ...
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Confirming parameters for XFS filesystem and LVM volume striping over 2 ADAPT (RAID6-like) volumes

We are setting up an ADAPT0 (RAID-60-like) configuration for a file server. We have six disk pools. Each consists of 14 disks and is set up using ADAPT. According to Dell's official white paper, ADAPT ...
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How does OS read disks that were formatted as 520?

The question is about disks that were formatted as 520 or 528 bytes rather than 512 bytes. How does the operating system read data if I cannot access to those disks via hexedit/cat or any viewer? Is ...
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Can we move RAID configured disks across different Servers

I have 2 SSD disks configured as RAID 1 using RAID feature in BIOS. By chance if my motherboard and processor is damaged, can I connect these 2 SSD disks to another Server. Will these SSD disks boot ...
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Adding an Uncofigured Good drive to an existing drivegroup/RAID setup

I have a machine with a few drives in it. Running storcli /c0 show produces this relevant info, et.al.: TOPOLOGY : ======== ---------------------------------------------------------------------------- ...
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How to mount and recover data after succesfully building the raid again?

We have a synology nas and one of the 2 disks crashed although smart was passed and the data was intact. Note that although the disks are not in a raid, years ago we chose SHR and apparently synology ...
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Optimal RAID configuration for EC2 instance store used for HDFS

I'm trying to determine if there is any practical advantage to configuring a RAID array on the instance store of a 3x d2.2xlarge instances being used for HDFS. Initially I planned to just mount each ...
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What this message from HPSA RAID controller means

I have two indentical HP server with hardware raid controller. on the raid I have 2 SSD's as RAID1 and 3 x 1 TB SATA disks as RAID5. on both servers I get messages like this about RAID5. Jun 23 14:58:...
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Do I need to replace my NVME SSD?

I have a simple server setup: 2 NVME SSD disks (both SAMSUNG MZVLB1T0HALR-00000 for 1TB) united into RAID0. OS Ubuntu 19.04 Today my system stopped responding. Reboot didn't help. I connected via KVM ...
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How is the HPE SSA “remove drives” command supposed to work to shrink an array?

I have an HPE ProLiant DL380 Gen9 Server with 15 internal 8TB SAS LFF drives, in a RAID6 configuration through an HP Smart Array P840ar controller. It contains a single 94.6 TB Logical Drive [Size: ...
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Can I create a RAID-1 using Intel RTST on existing FIlesystem?

I am installing ubuntu on a fileserver having existing data. The server has 2X4TB disks in RAID-1 configuration usint Intel RTST. And Because the one is failing (the RAID-1 is degraded) I disassembled ...
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Smart Array P420i Permanently replace Predictive Failure Disk with Spare

I have a Smart Array P420i configured as below: Smart Array P420i in Slot 0 (Embedded) Array A (SAS, Unused Space: 0 MB) logicaldrive 1 (838.1 GB, RAID 5, OK) physicaldrive 1I:2:1 (...
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FIO Benchmarking - Inconsistent and Slower than Anticipated: Are my RAIDs Misconfigured?

TL;DR: I'm having some performance issues with my hypervisor storage. here are a bunch of test results from fio. Skip to the Results section to read about them and see my questions. Summary I ...
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What are mounted servers? [closed]

What are mounted servers and are there any other types of servers too? What are different configuration? I have heard about RAID. Is this the way multiple servers are connected to form a single server ...
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ddrescue of a software RAID drive to an .img file, trying to mount results in unknown filesystem type 'linux_raid_member'

I had a Linux sofware RAID10 fail 2 disks on me and after I tried to force an assembly with the start a RAID10 with 2 disks trick, all I got was an empty lost&found directory. So I ran a ddrescue ...
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Struggling to grow my physical VDO size after MD grow

I'm hitting a bit of a brick wall here with vdo growPhysical -n pool. I've recently replaced my 3TB HDD's with 4TB HDD's in an md RAID5 array, which is now showing the correct capacity (8TB) but not ...
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How to interpret conflicting status data between `smartctl` and `mdadm`?

I have a HDD which is a member of a RAID10 array. smartctl and mdadm give me conflicting indications of its status. smartctl claims that the disk is FAILED: $ sudo smartctl -H /dev/sdf smartctl 7.0 ...
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DL360 gen7 + 2 SSD Raid 10 crashing and amber lighting nonstop - it works fine with 2 SAS HDD

Thats it pretty much, I have this recently acquired DL360 with 2 300gb SAS HDDs. Every thing works fine with them in RAID 10: no crashes, no sudden amber lights, no amber lights after every reboot, no ...
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RAID 1 HDD vs SSD [closed]

I would like to implement backup solution in my workstation - I do not take separate NAS server into consideration, one machine is the limit for me. My desktop is up almost 12h per day, and it can ...
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What filesystem and RAID for a server syncing linux windows macOS android and iOS machines

I plan to have one master server including several HDDs (for RAID5, probably all homogeneous with 4TB each), and one remote slave server containing only one big capacity HDD, or a bunch of disks not ...
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Few questions about creating RAID0 with LVM

I'm little confused, because I found two different instructions about creating RAID0 with LVM. First resource shows way of creating RAID0 wit this pattern: lvcreate -i[num drives] -I[strip size] -...
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Does MegaRAID support creation of initially degraded RAID array?

I want to make a RAID5 array out of 3 disks, copy data from the one disk I have then clear it and add as a spare to the array. A similar magic I can do in linux with mdadm utility (mdadm --create drv1 ...
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How beneficial are self-healing filesystems for general usage?

I have recently looked into advanced filesystems (Btrfs, ZFS) for data redundancy and availability and got interested in the additional functionality they provide, especially their "self-healing" ...
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mdadm - error 524 when assembling array / configuration reset after reboot

It's my first question here, so hello everyone! I have a peculiar problem with my company webserver. I was running it happily on Raspberry Pi 4 for quite some time now. For storage I used two 500GB ...
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Recommended approach to build a 24-disk pooled SSD hot-set cache: RAID, LVM JBOD, etc?

I'm trying to figure out the lowest hassle way to provision 24x locally attached SSDs as a large logical volume with low-value data. I'm using them as a hot-set cache for data who's master state (...
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Swapping out a HP H240 host bus adapter to a P420?

Does anyone know if it is possible to keep the current raid configuration if swapping from the H240? It's currently running raid1+0 with 4xSSD's and I've noticed the poor write performance compared ...
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Need Help Restoring A Failed RAID5

I was handed a Seagate NAS with 4 HDDs set up as RAID5. One of the drives failed: won't spin up, clicks, etc. The other 3 drives are fine. They spin up, when connected via USB, the data on them is ...
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Recovering mdadm 4-disk RAID5 array with 2 out of date disks

Edit: The scenario in this wiki, where 1 drive has a slightly lower and another a significantly lower event count than the rest of the array, suggests assembling with --force while leaving out the ...
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RAID configuration HPE Proliant DL360 G6 [closed]

I've got an old server and I would like some advice on the RAID configuration. I have 8 disks of 300GB. And I'm not sure which setup is more desirable. 2x RAID1 (os: hyper-V) 6x RAID5 (VMs) or 8x ...
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mdadm raid1 with three disks where two disks would be an inner raid [closed]

I currently have two disk of the same size (4TB each) in raid1. I'm wondering if it's now possible to add an additional disk of size 8TB and have it as raid 1 with the other two disks acting as raid ...
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Dell server lost RAID virtual disk

I have 3 disk in RAID. I added 2 more and I created new RAID1 from them using Dell Yystem Service utilitty. After reboot server wont to boot from old RAID so i launched PERC configuration and now I ...
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Rebuild a temporary disconnected RAID device

If I build a RAID 5 array (specifically MD RAID on Linux) and then 1 of the drives disconnects for whatever reason, does that drive need to be rebuilt from scratch if: No data has been written to the ...
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Can VMware ESXi be installed on a server with 2x480GB DC SSD, Adaptec 8405 SGL, RAID 1?

Intel Xeon E3-1275v5 4x RAM 16384 MB DDR4 ECC 2x SSD SATA 480 GB Datacenter RAID Controller 4-Port SATA PCI-E - Adaptec 8405 SGL The VMware-VMvisor-Installer-6.7.0.update03-14320388.x86_64 installer ...
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Dell H730 in HBA mode - Why are there issues with performance and SMART data? [duplicate]

I recently purchased a Dell R730xd that came with an H730 RAID card. I would like to bring an existing 6 disk ZFS pool to this server as well as create an additional 6 disk hardware RAID. In my ...
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Dell R730xd - Best way to configure storage for simultaneous use with ZFS & Hardware RAID

I recently purchased a Dell R730xd that came with an H730 RAID card. I would like to bring an existing 6 disk ZFS pool to this server as well as create an additional 6 disk hardware RAID. Is it ...
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Possible to run a G-Technology G-SPEED Q with only 1x hard drive installed?

I picked up an old G-Technology G-SPEED Q that had had all of it's internal drives removed. It previously held 4x 2TB hard drives that it could run RAID 0 or 5 accessible via USB 2.0, Firewire 800 and ...
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Replaced a RAID controller, now Red Hat won't start :(

I'm working with a client's HP ProLiant ML110 G7. At the beginning of the week, it wouldn't boot or POST at all. Over the course of the week, we've replaced the memory, motherboard, and power supply....
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Creating an array on HP P822 with non empty disks

I have several ProLiant ML310e servers with P822 RAID cards and have moved a RAID1 array of two disks between servers. Wanting to start fresh I deleted the RAID1 array and created a new one on the ...
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smartctl selftest read failure an 4 drives (Raid6) at the same LBA

I just repurposed 4 drives that where out of use for a long time and installed arch linux (raw discs -> mdadm -> dmcrypt -> LVM -> ext4) on them. While creating the LVM i got "ATA read errors" for ...
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Importing a Raid1 single disk and use it as a drive

I had an Intel raid1 disc array (3tb each) and had to rebuild the system. Now I have both disks but really don't need raid anymore as I'm just planning on using backblaze to backup my data on the PC. ...
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Linux RAID Accidentally Changed Disk GUID using sgdisk

I accidentally changed the GUID on a Disk using: sgdisk -G /dev/sdb So far, the RAID hasn't been affected. Is there a way to grab to restore the correct one, or will it matter? I have not rebooted ...
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Rebuild Linux Software Raid 10 Adding Replacement Disk

I have a CentOS 6.10 Server with 4 x 2TB Drives. One was failing (bad sectors and causing major disk IO bottlenecks). This is a headless server in a remote data center. Technician is going to replace ...
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Use striped and cache simultaneously for an LVM LV?

Assume vg0/cache and vg0/cache_meta are prepared beforehand on SSD /dev/sdc1. I created a striped LV: lvcreate -n data -L 16T --type striped -i 2 vg0 /dev/sda1 /dev/sdb1 mkfs.xfs /dev/vg0/data Then ...
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Does this SMART report indicate a bad disk?

On a remote server, I have 2x3TB drives set in raid 0 with SLI raid card. I tried to run SMART tests to see if drives have a problem because server become unresponsive and one drive had to be put back ...
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Extremely Poor RAID Array Performance

I have a HP DL20 G10 with the Xeon 2134 CPU. This server is configured with 3x CT960BX500SSD1 1TB Solid State Drives in RAID 5 on the S100i software raid controller (Windows Server Essentials 2019). ...
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Raid card not detected by Megacli or storcli. Ubuntu detects the card

I am trying to get my MegaRAID SAS 9341-8i to work on my server. I have ubuntu 16.04 installed at the moment in legacy boot mode. I only installed 16.04 because I wanted to see if it was the version ...
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How to resolve a DegradedArray event when one drive has been permanently removed from RAID array?

When I installed my VPS some months ago (Ubuntu 18.04), the default RAID configuration was relying on 3 disks. I removed /dev/sdc from the array to create a new partition. RAID array is now as below: ...
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wipefs doesn’t clear raid or LVM data?

I have a kickstart file that attempts to handle the lack of support for RAID on /boot and /boot/efi by creating the partitions of the two RAID1-disks manually. When reinstalling, the script wipes the ...
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Perc H710 on Windows 2016

Excuse me for a naive question. I just got R720 with 4x3T on RAID 5 using H710. In the server manager, I saw disk with 8T which I suppose is the virtual disk I set up using H710; In volumes, there is ...
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RAID - What happens if I import foreign configuration from newly inserted disk into an exisitng raid

Does the existing RAID fail if I import the foreign configuration from newly insert disk? Say I have a RAID 10 with 4 drives and I insert the 5th drive and its in Foreign state. Does it destroy my ...

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