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.
Questions tagged [raid]
3655 questions
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RAID 1 Reliability: 4 drives vs 2 Drives + 2 Spare Drives
Which is likely to be more reliable (safer data + lower downtime):
having 4 drives in RAID 1
OR
having 2 drives in RAID 1 plus 2 spare(s)?
In other words, is there an advantage in having spares when you are setting up RAID 1 with 4…
Gaia
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I Want an Affordable Snapshot-Saving Crypto-Backupping RAID NAS
This is what I am looking for: A NAS storage/backup solution (hardware/software combo) which has
RAID for redundancy
full-disk encryption for security
snapshot capabilities (multiple/regular snapshots)
It must be affordable (<1000 USD), and not…
grojo
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configuring RAID 1 on a Enhance Technology R4SA EnhanceBOX eSATA
My place of employment has this under-utilized Enhance Technology R4SA EnhanceBOX 1U 4-Bay 4-port eSATA Disk Array Enclosure, with each bay having a 1.5 TB drive. You can see the back of it here …
RobbieTheK
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MegaRaid LSI-9271-8i random drive failure
Anyone have tips on figuring out if I have a bad megaraid card? No matter how I configure with bbu or without. I am using wd red drives and even with brand spanking new drives it marks random drives as failed. While moving data do it. I fear I have…
Momthemeatloaf
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usb jbod enclosure, software raid1; after reboot, mdraid using wrong devices
I mirrored two disks in a USB enclosure on my Arch box, created a filesystem, mounted it, copied a bunch of data over. Everything was great. Then I waited until the md sync was done and rebooted...
#lsblk
sdd 8:48 0 7.3T 0 disk
`-sdd1 8:49 0 7.3T 0…
John Cholewa
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Recover a linux raid array after running "mdadm --create"?
So I did something stupid and I'm wondering if I have any options.
I lost my OS drive (centos 7) but was able to keep my 4x 3tb raid drives. So I reinstalled centos on another drive and tried to rebuild the array by running this command:
mdadm…
Bryan
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3ware: Replace failed disk with Spare
I have a 3ware RAID controller running a RAID-10.
I have a disk that currently has a SMART-FAILURE. I've ran a /c0 rescan and the Status will change to OK then back to SMART-FAILURE
> /c0 show
Unit UnitType Status %RCmpl %V/I/M Stripe…
hfranco
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Replaced raid controller, raid config missing, server not booting
My raid controller went bust, and my hoster OVH replaced it. They only offer hardware support, so after replacing the controller they left the machine in Rescue mode. When I put it in normal HD boot mode it won't boot up.
I had 2 drive software…
Mr.Boon
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on RAID1 (OS) and RAID5 (DATA) - Need to rebuild OS
I have a HP server with RAID1 (300GB2) - Array A and RAID 5 (300GB3)Array2. Unfortunately I have to rebuild the existing OS on RAID 1. I have full data on RAID 5. Can I access my RAID5 Data once I rebuild the new OS W2k12 on RAID1? Do i need to…
Ash
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Why are my ZFS pools "unavailable"?
I just replaced a hard-drive, that was part of two different redundant pools, and now both pools are unavailable...
Details:
There are four drives: 2x4TB (da0 and ada1) and 2x3TB (da1 and da2).
One pool is a RAIDZ1 consisting of both of the 3TB…
Mikhail T.
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Broken RAID Array, no superblock detected
I run a CentOS system with 2x SSD in RAID1 and 4X SAS drives in RAID10. Linux is installed on the RAID1 array.
This morning I noticed that my RAID10 array (md4) had gone missing, and that my RAID1 array (m2/m3) was broken. I ran a smartctl on all…
Mr.Boon
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Adding disks to existing RAID array
We want to increase disk space of one of our server. Currently it has 8 physical disks(4 x 480 GB, 4 x 1.9 TB) and 3 virtual disks(RAID 1 (2 x 480GB), RAID 1 (2 x 480 GB), RAID 10(4 x 1.9TB)). We want to increase disk space on virtual disk 3 which…
Ketan
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High load after creating a new LVM raid5
I just redid my NAS, switching from ZFS to LVM raid. This is a new raid with 3x8TB, each physical volume is a LUKS volume.
lvs -a -o+devices
shows me:
LV VG Attr LSize Pool Origin Data% Meta% Move Log…
rmalchow
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Poor disk performance on FreeBSD
We have IO issues with our servers on FreeBSD and I am wondering if FreeBSD is the cause.
Server:
FreeBSD (our environment runs in a jail)
i7 8 cores (utilized around 10 - 20 %)
64 GB RAM (utilized around 10 - 20 %)
RAID Z2 of 6 WD 1 TB WD RE SATA…
jakub.petr
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Raid CentOS Server with blank screen
I am unable to boot the CentOS Server. It has version 6.10. It has raid 5 (or 10) with 4 hard drives. I can't get into the Bios anymore. It has Phoenix cME FirstBIOS Pro Setup Utility Bios. When it boots up, it just go straight to the blank screen…
Kenny Super Noob
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