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Questions tagged [raid0]

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

RAID (Redundant Array of Independent Disks) Level 0 or Striped set uses two or more disks combined to act as one larger volume. The data is split or "striped" across each disk, increasing throughput. RAID 0 stores no parity information and thus provides no data redundancy: the loss of one disk in the set will result in the loss of the whole volume.

RAID 0 is commonly used in conjunction with RAID 1 to form RAID 1+0 (10) in what is referred to as a Nested RAID. RAID 10 is a striped set from a series of mirrored drives.

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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 RAID stands for redundant array of independent (or…
Gavin Burke
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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 sdb to it. Disconnect sdb. Right now I see only…
maniaque
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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 and how does it work? From these ceph benchmarks…
JKnight
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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] -l100%FREE -n[lv name] [vg name] but looking into…
s-kaczmarek
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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 purchase two 72GB HDDs more (same as the one's already…
Maxim V. Pavlov
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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 with currently the most unallocated space. Therefore…
cranckstorm
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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 running on some web servers, which are also at the…
Luis Fernando Alen
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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 0 part sdb 8:16 0 2,7T 0…
Álvaro de la Vega Olmedilla
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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 would like to be able to rotate one of the arrays on…
JimmyJ
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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 ID: 1006591079 Providers: 1. Name: stripe/st0 …
user156294
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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 259:0 0 1.7T 0 disk `-md0 9:0 0 3.5T …
user3098466
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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 the ZIL. I want to keep using ZFS on 2 bigger…
julianjm
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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 will the controller divide the disks for the RAID…
rst-2cv
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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 lsblk but could not mount them. My question is,…
saremapadhasa
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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 Intel RS2BL040 which is on a 16x PCI Slot Ported to…
McFlySoHigh
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