Questions tagged [raid0]

RAID 0 or Striped Set splits data across two or more disks, without redundancy.

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6 answers
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Why is RAID 0 classed as RAID when it's not redundant?

I've worked in IT quite a number of years, so I know what a RAID array is, what RAID 0 is, RAID 1, 5, 6, 10, 50, 60, etc., but something sprung to mind in a recent conversation at work; if ...
Gavin Burke's user avatar
16 votes
3 answers
19k views

mdadm - Remove disk from RAID0

So, I'd like to know, is is possible to do the following with mdadm: I start with RAID0 configuration on 2 disks: sda and sdb. I would like to add one more disk to array, sdc and move all data from ...
maniaque's user avatar
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9 votes
1 answer
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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] -...
s-kaczmarek's user avatar
8 votes
6 answers
43k views

What is a single drive RAID 0 array?

My understanding of RAID 0 is that the data is split and striped across all of the drives in the array. If there is only one drive in the array, then what is the point of a single drive RAID 0 array ...
JKnight's user avatar
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7 votes
2 answers
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Is it possible to enable RAID 1 on an already in-use HP Proliant DL380 G5

I have a HP Proliant DL380 G5 with two HDDs in RAID 0 (Stripe)(72GB+72GB). It has been running Windows Server for quite a while now and has 30GB of occupied space on a stripted volume. I've now ...
Maxim V. Pavlov's user avatar
6 votes
1 answer
4k views

BTRFS single data FS still striped?

UPDATE So after a long time of research in the official documentation, I found out that btrfs allocates space in chunks each 1Gb and when using single mode, these chunks are allocated on the disk ...
cranckstorm's user avatar
5 votes
4 answers
7k views

High iowait on Amazon EC2 MySQL instance with EBS volume

We have a MySQL server running on an Amazon EC2 c1.medium instance relying on a single EBS volume using the ext3 filesystem for storage. This MySQL server is queried ~500/ps by several applications ...
Luis Fernando Alen's user avatar
3 votes
1 answer
427 views

Rotate entire disk set in RAID0 array?

We have a Lenovo RD430 with a RAID 500 controller. Installed in the server are 6x 4TB drives configured as 2x RAID0 arrays of 3x 4TB each, however, we also have another 3x identical 4TB drives and ...
JimmyJ's user avatar
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3 votes
3 answers
10k views

How to make a byte for byte copy of a drive? [duplicate]

Possible Duplicate: Using DD for disk cloning What's the easiest and most reliable, risk free, way of making an exact copy of a hard drive? We have a drive that's been messed up by someone re-...
Matt Peddlesden's user avatar
3 votes
1 answer
244 views

Drive allocation in a RAID 50 array on a HPE DL380 G9

I have a DL380 G9 with 12x8TB 3.5" disks: | 1 | 4 | 7 | 10 | | 2 | 5 | 8 | 11 | | 3 | 6 | 9 | 12 | In the Smart Array Controller GUI, if I select all 12 disks and assign them to a RAID 50 array, how ...
rst-2cv's user avatar
  • 179
3 votes
3 answers
692 views

ZFS on top of a bunch of Raid0 (1 disk) volumes with battery backed write-cache

I'm reinstalling a workstation (not a headless server) with an Intel RAID card with BBU and 4GB internal cache. My current setup uses ZFS on a pair of mechanical disks and a partition on an SSD for ...
julianjm's user avatar
  • 270
3 votes
3 answers
9k views

mdadm not assemble after restart

I have 2 disk with the next structure: lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 3,7T 0 disk ├─sda1 8:1 0 2,7T 0 part └─sda2 8:2 0 931,5G ...
Álvaro de la Vega Olmedilla's user avatar
3 votes
1 answer
147 views

Is the sum of IOPS for individual physical disks not equal to the raid0 logical disk?

I have a raid0 set up consisting of 2 physical disks: bash-4.2$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT xvda 202:0 0 100G 0 disk `-xvda1 202:1 0 100G 0 part / nvme0n1 259:...
user3098466's user avatar
3 votes
0 answers
253 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 ...
user156294's user avatar
2 votes
2 answers
10k views

Linux- Convert 2 disk raid1 to raid0

I have a linux server (3.19.0) which has raid setup with md (v3.2.5). / is a raid1 device with 2 disks. There was a mistake when installing this machine, instead we need those 2 disks to be in raid0 ...
Amandasaurus's user avatar
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2 votes
2 answers
885 views

2 disk raid0, move all data to one disk, so the other can be removed

I have a raid0 md disk made up of 2 equalized disks. I would like to remove & replace one of the disks (with a disk of the same capacity), without losing any data. Since the md filesystem is only ...
Amandasaurus's user avatar
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2 votes
2 answers
5k views

HP G8 migrate RAID0 to RAID1 with CLI commands

This is a Dynamic Smart Array B120i. The SSA (Smart Storage Administrator) is ver 1.50.4.0 The OS was installed into a single hard disc (bay 1), the SSA reports like RAID 0. Then I add a new hard disc ...
505JE's user avatar
  • 31
2 votes
3 answers
181 views

HDD RAID0 question

If you have 2 raptor 10k rpm drives in Raid0, can you add another sata (7200prm) drive outside of the RAID or would it have to be inside the RAID? What would be the consequences of adding a 7200 RPM ...
Jim's user avatar
  • 121
2 votes
2 answers
24k views

Trouble Installing Windows Server 2008 R2 on a Dell PowerEdge R220

I'm trying to install Windows Server 2008 R2 64-bit for the first time in a Dell PowerEdge R220, using UEFI. At first the installation wouldn't see any disks. Then, I found this: Trouble Installing ...
msb's user avatar
  • 205
2 votes
1 answer
455 views

FreeBSD vinum striped (RAID0) volume - performance issues

I've experimented with different striped volumes in vinum under FreeBSD 8.2-release. I have current hardware (Intel i5 processor, adequate MB and 8GB RAM). My test-setup consists of 2 or 4 disks in a ...
poplitea's user avatar
  • 467
2 votes
1 answer
2k views

Linux RAID0 creation with existing data disk and an empty disk

I have a CentOS 7.7 server which has a vhd /dev/sdc mounted (format-type= btrfs); it contains data. I attached a empty vhd to the VM, /dev/sdd (I didn't partition this disk using fdisk) lsblk ...
Tim's user avatar
  • 123
2 votes
1 answer
2k views

DELL FS12-SC PERC 6/i replacement with JBOD support? [closed]

I have 3 DELL FS12-SC servers with a bunch of 3TB drives (issue number 1, the perc 6/i doesn't appear to support 3TB drives). I'm setting up a ceph cluster and need to run the drives in JBOD mode. The ...
Brian Lovett's user avatar
2 votes
5 answers
1k views

Recover bad data from RAID-0

I have two hard drives that were setup as RAID-0 and NTFS, one of the hard drives has bad sectors. does anyone know if I ran Spinrite to move those bad sectors, will I still be able to access the ...
miro23's user avatar
  • 198
2 votes
1 answer
2k views

Maximum size of a RAID0 on a HP Proliant DL380 with a Smart Array 410i controller?

I've been tasked with buying a server that needs a ton of storage in a RAID0 (in the 8-12TB range). Since I know nothing about RAID controllers, I figured I could just put 4x2TB into a RAID0 array and ...
KarateSnowMachine's user avatar
2 votes
2 answers
325 views

Migrate regular SATA in HP Raid Controller P812 (Linux, DL580 G7)

I am trying to add existing HDD to HP P812 Array Controller. I connected hard disks using mini-sas to SATA cable and configured each of them as logical (RAID 0) volumes individually. They appeared on ...
saremapadhasa's user avatar
2 votes
1 answer
305 views

Transfer Speed Sudden Drop on Intel Raid Card between (2) 4 SSD Raid 0 Arrays

Preface; I have done hours of trouble shooting on this issue and simply cannot find out what the sudden "bottleneck" is. I have (2) 4 SSD Disk Raid 0 Arrays (3.8TB Each). They are run off a single ...
McFlySoHigh's user avatar
2 votes
0 answers
383 views

How to recover an Intel RAID 0 on a Rocks cluster distribution

We had a Rocks 5.5 distribution on our cluster and wanted to upgrade to 6.2. The "/export" partition was mounted on a Intel software RAID 0 array of 2 identical hard drives (HD) (/dev/sdb and /dev/sdc)...
Mohammad's user avatar
1 vote
3 answers
12k views

mdadm: add new device failed for /dev/xvdl as 2: Invalid argument

I have existing RAID0 setup with two disks. I have to add a new drive to it. But when I try to run the following command: mdadm --add /dev/md/customer_upload /dev/xvdl I get an error: mdadm: add ...
Ut xD's user avatar
  • 238
1 vote
2 answers
2k views

Check badblocks on RAID-0

Without RAID-0, I usually check bad sectors using this command: fsck -yvckfC -E fragcheck /dev/sdX How to check bad sectors when the harddisk was using RAID-0? should I run it for each drive? /dev/...
Kokizzu's user avatar
  • 219
1 vote
1 answer
114 views

Script to automate Raid0 on Windows Server 2008

Could someone point me to a script that I can run upon startup to create a Raid0 drive on windows server 2008. The inputs would be the drive letters of two drives to use for the array.
Suraj's user avatar
  • 845
1 vote
2 answers
386 views

Opened raid1 in raid0, what now?

I accidentally opened my 1 disk raid1 as raid0 with mdadm --create, and this looks like it overwrote the default raid meta info, and makes my device detected as raid0 with mdadm --assemble --scan. For ...
clooney's user avatar
  • 11
1 vote
2 answers
2k views

LSI MegaRaid - Image Drive from Failed RAID

I had a power failure and my LSI MegaRaid 3 disk SAS RAID 0 failed. My attempts to recover the RAID have also failed. I plan to rebuild the array and go with RAID 5 and add another SAS disk. ...
nomaam's user avatar
  • 111
1 vote
1 answer
1k views

Raid Controller not recognizing hdds after removal. Poweredge 6950

I have a Dell Poweredge 6950 running server 2012 with 4 hdds. 80gb raptor (with OS), 2 500gb WD black in raid 0 and a 1tb raptor. I shut off the server, removed the 2 hdds in raid and the 1tb raptor. ...
brs0210's user avatar
  • 13
1 vote
1 answer
193 views

Is this infrastructure safe for scaling EBS online?

Our application uses EBS to store data. The storage requirement of the application grows rapidly as users signup. We need to do it online so that users don't experience downtime with the application. ...
Sabya's user avatar
  • 776
1 vote
4 answers
146 views

Linux RAID0 - relocating member disk

I've got an issue I would rather handle with the array online - I am using RAID0 for temporary video storage - data that is low-cost to restore, but that is used frequently. The software array looks ...
qdot's user avatar
  • 138
1 vote
1 answer
225 views

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 ...
Jacob Larsen's user avatar
1 vote
1 answer
2k views

lsi megaraid convert raid 0 to raid 10 without data loss?

I am using a lsi megaraid controller with firmware version 2.130.353-1819 (aug 09 2012). There I had a raid 5 with 4x4tb disks. What I wanted to do is to migrate from raid 5 to raid 10. The megaraid ...
trashbox2k's user avatar
1 vote
2 answers
5k views

lsi megaraid 9260 single raid0 disk went unconfigured bad, please help recover data

I had some problem with my server with lsi megaraid 9260 chip(no JBOD support). I cannot recall exactly but I think I had a single drive as r0, and it failed. I need to recover data from it, if ...
platimnekriptu's user avatar
1 vote
2 answers
617 views

mdadm Build legacy array with 512-byte chunk

I'm attempting to build an array using mdadm. The array has 512-byte (not kibibyte) sized stripes. Because mdadm accepts arguments to chunk in kibibytes, not in bytes, I have been unable to build ...
OmnipotentEntity's user avatar
1 vote
0 answers
62 views

So...an LSI SAS9211-8I, ARECA AR-1882IX-12 and some 12TB Hitachis walk into a bar

By the title of this I hope it's obvious that I'm trying to console myself with humor after the idiotic mistake I made last night. And I'm hoping that someone out might be able to verify a few things ...
Jason Paul Michaels's user avatar
1 vote
2 answers
265 views

Debian10 , RAID : did it changed since Debian9?

I'm installing a backup server with a Debian10 installed and running on its NVMe disks. It also has 4x6TB SATA hard drives, and I'm trying to set these up as a RAID0 array. I'm usually following the ...
BxlSofty's user avatar
  • 753
1 vote
1 answer
543 views

JBOD (spanned volume) on top of RAID 0 in Windows Server

I currently have a Windows Server 2008 R2 setup with a RAID 0 drive (2x2TB SSD) which is getting out of space. I want to increase de available space adding more drives (probably another 2x2TB SSD) ...
Super Rey's user avatar
  • 111
1 vote
0 answers
170 views

Elasticsearch: fine-tuning for RAID0 HDD array storage

It is usually recommended to have the following index settings in case spinning disks are used for Elasticsearch data storage: index.store.throttle.type: none index.merge.scheduler.max_thread_count: ...
Maxim Gueivandov's user avatar
1 vote
4 answers
3k views

Mixing RAID0 and RAID1 on the same set of drives

I am soon installing a new pair of drives in one of our machines that exists as a VMWare host box (running VMWare Server at the moment). They are going to be used as a RAID0 array for a couple of ...
David Spillett's user avatar
0 votes
1 answer
2k views

What is the risk of RAID 0 for a *single* disk versus no RAID on that disk?

I have a server that I'm having trouble with getting the drive to show up without using RAID. However, that's different question. This question is about the problems running a RAID 0 on a root drive ...
user avatar
0 votes
1 answer
330 views

Recover data from 1 disk after broken raid 5

in a bit of an emergency. I am taking control of some servers that someone else had setup. One of them has crashed and it was critical. Here is what I found: The server (Dell r710) was operating with ...
rjricardottco's user avatar
0 votes
1 answer
2k views

Slow read speed. Raid 10 + H700 (1GB RAM + battery) + 4x 450 Hitachi 15K

So I have installed 4x 450GB Hitachi 15K in Raid 10 (Dell T610 + H700 + mem + battery). I have very simple issue. Read speed is terrible, I have also installed Raid 0 (2x 3TB WD Red) and speeds are ...
mike86's user avatar
  • 35
0 votes
3 answers
1k views

PERC H310 Raid 5 - Fault - Turn array into RAID 0

Yesterday one of the three Raid 5 disks I have configured into my DELL Server PERC H310 controller cannot be found anymore. I cannot replace the faulty driver now, so the thing I actually would like ...
Scudelari's user avatar
0 votes
2 answers
2k views

Is it possible to change disk in RAID0 array of Intel Rapid Storage Tehnology?

My BIOS started to report red line with error for one of 2 drives in RAID0 array during boot. But file system appears to be working without any visible problems, so I was able to make system image and ...
alpav's user avatar
  • 161
0 votes
1 answer
998 views

Windows 2008 R2 raid 0 over hardware raid 5

I am consider using windows raid 0 and raid 1 over two hardware 4x2tb raid 5 arrays. (thinking Seagate green drives). 2x Rocketraid 2680 controller but that could easily change. So, that would give ...
Sleeper Smith's user avatar