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Questions tagged [raid1]

RAID 1 or Mirrored RAID uses two or more disks that store the same data.

RAID Level 1 or mirrored RAID uses two or more disks that store the same data. One disk is mirrored to the other. Write speeds are the same as using one disk, and read speeds are twice as much.

RAID 1 is used when reliability needs to be higher than normal.

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RAID patrol write to force sector remap/rewrite?

So I have a HPE S100i SR Gen10 software RAID 1 device that hosts 2 SATA SSD's for a Windows boot partion. The HPE Storage Array management software looks like it found a problem on the SSD's during a patrol read... Warning: This logical drive has…
Asteroza
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Resize partitions Ubuntu 18.04 RAID 1

This is the output of fdisk -l Disk /dev/sda: 5.5 TiB, 6001175126016 bytes, 11721045168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096…
George Girgolas
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Should I be worried about data integrity on my raid1 array?

I have a RAID (mirrored - 2 spinning rust hard-drives). In the past two weeks, it happened 2 or 3 times, that the raid hasn't been displayed in KDE's Dolphin (file browser), anymore. This was the output of cat /proc/mdstat when it happened just a…
doh-nutz
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Debian Software Raid1 boot failure after trying to change one disk

I have a server running Debian 11 with 3 HDDs, each 500gb using software RAID1. I'm now in the process of upgrading so I have 2x1TB drives. To accomplish this I followed this guide. The disk I removed first was /dev/sda. Now when I have 2 disks left…
Jonathan
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How to determine if a CentOS system is Raid-1?

I've tried searching for this answer, but haven't found anything elegant. I have numerous servers in a colo that is in another state. I need to find a way to check that the servers have RAID-1 on them, so that I can determine if they were setup…
Tedd Johnson
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mdadm raid1 irregular degraded without reason

My raid1 went to degrade state from time to time. Then my application crashes, because the raid is in read-only mode. After a reboot the raid is working fine again. Now I want to find out whats the root-cause for this error. Maybe someone has a tip…
Mark
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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 operating system (Windows Server) has its own drive…
Kyle Souza
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Changing RAID1 HDDs (Dell PowerEdge R430) to another identical server

I'm new with server configuration and infrastructure. If I have two identical servers (PowerEdge R430), one for spare without HDDs  (call it S1), and another online with the HDDs (S2). If I remove the HDDs from S2 and place it on S1, will it work…
Suurune
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PCI NVMe mdadm RAID1 performance too slow

I know this has been discussed multiple times but I have not found any solution so far that worked so posting here hoping there is some solutions in Dec 2021… I have a Dell R640 server with dual Xeon Gold processors and 384gb ram. The chassis is…
JackFrost
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SAS Drive Upgrade

We have a HP Proliant server with a RAID 1 disk ( 2x 146Gb 15K SAS) configuration. The logical drive is full and I would like to expand it. I've purchased 2 x 300GB 15K SAS to replace the 146K Operating System: Windows Server 2012 Any advice on…
yvalcorp
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RAID1 Recovery after Degradation

Below is the output from lsblk, mdadm and /proc/mdstat for my 2 disk Raid1 array anand@ironman:~$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 465.8G 0 disk |-sda1 …
newbie
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Recovering a file by mounting a Synology RAID1 disk in Ubuntu (mount, mdadm, and losetup issues)

I'm working with a Synology RAID1 system and deleted a file that wasn't yet backed up. To recover the file, and since an undelete approach seems to be impossible, my idea is to mount a single RAID1 disk in Ubuntu 20.04 LTS and search for it, but I'm…
jay.sf
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Identify HDD failure by sound + Is it safe to run smartctl on a mounted RAID1?

Basically, I have two WD HDDs in a programmatic RAID1 (no special hardware): $ lsscsi --verbose [0:0:0:0] disk ATA WDC WD10EFRX-68F 0A82 /dev/sda dir: /sys/bus/scsi/devices/0:0:0:0 …
miqem
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Data layout on RAID-1 Array

For the sake of this question, assume a RAID-1 array of two identical drives. RAID-1 (Mirroring) stores an identical copy of the data on both drives. How identical is the drive layout? Are the drives sector-by-sector identical (logical) - Excluding…
GCon
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Recover data from broken RAID 1 drive

I need to save files from a Buffalo NAS Linkstation with two physical drives that is not working anymore (2TB each, Raid 1). Error message says: The bad sectors in the hard drive may have reached a dangerous level. Replace the hard drive. I…
peterpetersonling
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