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

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31
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6answers
4k views

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 ...
8
votes
3answers
5k 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 ...
6
votes
1answer
1k views

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 ...
5
votes
4answers
5k 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 ...
3
votes
5answers
8k 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 ...
2
votes
1answer
370 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 ...
2
votes
3answers
2k 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 ...
2
votes
3answers
161 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 ...
2
votes
2answers
1k 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 ...
2
votes
1answer
10k 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 ...
2
votes
1answer
370 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 ...
2
votes
5answers
809 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 ...
2
votes
1answer
1k 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 ...
2
votes
0answers
187 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 ...
1
vote
2answers
403 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? ...
1
vote
1answer
85 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.
1
vote
2answers
306 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 ...
1
vote
1answer
1k 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 ...
1
vote
1answer
764 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. ...
1
vote
1answer
174 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. ...
1
vote
4answers
132 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 ...
1
vote
0answers
126 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 ...
1
vote
3answers
1k 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 ...
0
votes
1answer
122 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 ...
0
votes
1answer
227 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 ...
0
votes
2answers
522 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 ...
0
votes
2answers
704 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 ...
0
votes
1answer
948 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 ...
0
votes
2answers
139 views

Determining Raid Disk Set

Update Unfortunately looks like the engineer in question had rebuilt the drive we were looking for, and the two sets he thought he had were actually from two completely different machines. I am now ...
0
votes
1answer
25 views

Drop in write performance when mirroring two RAID 0 arrays

On a CentOS 7 server with 4 SSDs, I created two RAID 0 arrays with mdadm. Both were formatted with ext4 and mounted on separate directories. I benchmarked them using fio and got the following results ...
0
votes
1answer
28 views

Windows Striped Vs Single Hard Drive

I do video production and thus have a lot of large files. I ran out of room on my 4tb storage drive so I bought two 5tb WD Black drives. I installed them and set it up as a windows striped volume. ...
0
votes
2answers
35 views

Does data get bottlenecked when copying from one server to another when the two servers have different RAID configurations?

Suppose Server 1 is configured with 8 1TB disks in RAID 5. Server 2 is configured with 8 1TB disks in RAID 0. There is a link between the two servers but for the purpose of this question, lets suppose ...
0
votes
1answer
218 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 ...
0
votes
2answers
50 views

Will lvm raid0 lose data after linux system crash?

We want to use lvm to build raid0 array using amazon ebs, and we are worrying about the data safety. We have known that we need to halt the vm to backup. But we still want to know what will happen ...
0
votes
1answer
690 views

Upgrade to 3x Samsung SSD EVO in RAID-0 — what type of RAID controller to search for? [closed]

My current configuration is a RAID-0 with three conventional 2TB hard drives. I want to upgrade to three 1TB SSD EVO disks, also in a RAID-0 configuration. Using SiSoftware Sandra, I found out that ...
0
votes
1answer
265 views

Raid0 assemble disk again?

Our server recently suffered a disk failure, so our hosting provider put a new Disk in with CentOS so we can login and see if we can recover the data. We had 2 x 120 GB SSD drives in software RAID0 ...
0
votes
1answer
237 views

re-mount two old disk from raid0 setup to recover data

I had setup two 500gb disk in RAID0 on my server, but recently suffered a hard disk failure (saw a S.M.A.R.T error on the HDD at boot). My host has put 2 new disk in RAID-0 again (re-installed the OS) ...
0
votes
1answer
90 views

RAID 1+0 redundancy and data-loss recovery capability against RAID 1

I have a HP ProLiant server with two SCSI drives. I wanted to set up a RAID 1 array but the RAID configurator only allowed me a RAID 0 or a RAID 1+0 array. When either of my drive fails can I recover ...
0
votes
1answer
241 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 ...
0
votes
3answers
3k views

HP Smart Array; Is it possible to convert Raid1 to Raid0 by dropping a failed drive?

I have a server that was running two 60GB drives as a logical RAID1. At some point the second drive was physically removed and the logical drive has been in "Interim Recovery Mode" for several months ...
0
votes
2answers
519 views

remove raid0 from a dell t710 using perc

I got a dell server with 2 physical harddrives that are seen as one, because the system is utilizing raid0. How do we disable this striping, such that we can see two different drives. I'm well aware ...
0
votes
2answers
44 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 ...
0
votes
0answers
90 views

“personality does not support diskops!” when trying to add a drive to a mdadm raid array

I have a linux (3.19) server which uses software raid (mdadm v3.2.5) and there is a raid0 device (/dev/md2) set up, which currently has only /dev/sdb3. I want to add the unused disk /dev/sda3 to this ...
0
votes
0answers
113 views

RAID0 : best chunk size for fileserver with average 650KB files

I found out that my server(linux Ubuntu Server 14.04) has probably a to high chunk size for the RAID0, or atleast I think this is an performance issue... The current chunk size is 512K with 4 disk of ...
0
votes
2answers
539 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. ...
0
votes
1answer
44 views

linux raid0 array size

I made linux raid0 with 4 disks (1TB each). mdadm --misc --detail /dev/md0 shows Array Size to be 4TB. But when I mount this shared folder in a windows PC, it says that it has 105 GB size. How can I ...
0
votes
0answers
45 views

Why are bad superblocks happening

I have Dell MD1000 storage that has 3x 2TB sata hdds (RAID 0, will move to RAID 6 soon) and 90% of time I am reading from it 40-60MBps via webserver. When I want to restart machine I simply stop ...
0
votes
1answer
784 views

How do I set up a VM on Citrix XenServer to run on a Raid0 partition?

I have a dedicated server from a hosting provider that I got with Citrix XenServer 6.2 installed. I've installed XenCenter, and gotten connected. Everything seems easy enough until I try to create a ...
0
votes
0answers
114 views

Reconfigure from Raid0 to Raid1, is it possible?

currently I have Fujitsu tx140 s1p servers, one Tower and one Rack. They are both running with the same hardware, configures the same way, so I'll just ask one Q for both. They have an motherboard ...
0
votes
1answer
215 views

Optimized raid 0 configuration for Amazon EC2 hi1.4xlarge

How do I know what is the best configuration for RAID 0 (mdadm create options) between the to ephemeral drives?