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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Hyper-V R2: Need help with disk structure
I'm going to use the free (non gui) version of Hyper-V R2.
In my new server I have 8 disks in total (for Hyper-V R2 installation and virtual machine).
Atm I'm going to run a single virtual machine, with following tasks:
Windows Server 2008 R2…
MojoDK
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What does Quick Initialized RAID status mean?
We have re-created RAID1 on our IBM X3400, with the 8K-l RAID card, and now the RAID1 is in status of Quick Initialized.
I've read online that the performance of this status is might not be optimal, and some actions required to bring the operation…
SyRenity
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mdadm --create: RUN_ARRAY failed: Invalid argument
I'm trying to set up a RAID1 array, like this:
djc@miles dev $ sudo mdadm -v --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1
mdadm: Defaulting to version 1.2 metadata
mdadm: RUN_ARRAY failed: Invalid argument
This is with two brand…
djc
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RAID of SATA SSDs or PCIe Flash?
As a reference:
Crucial RealSSD C300 256GB drives.
MySQL 5.1.5x running InnoDB tables.
Linux (CentOS 5.5 etx3 journaled).
Questions:
Is it better to use a RAID of these so that drives can be swapped in and out or get a FusionIO or RevoDrive…
purplemonkeydishwasher
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Need help with MS SQL SAN disk array provisioning
We have a HP MSA70 with 20x300gb 2,5" 10k disks allocated for our SQL2008 server.
Our usage of the SQL server is:
50 concurrent users of our ERP system(Visma business) - 70/30 read/write.
2500 users pr. day on our website (CMS system + eshop) -…
MKO
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Rebuilding LVM after RAID recovery
I have 4 disks RAID-5ed to create md0, and another 4 disks RAID-5ed to create md1. These are then combined via LVM to create one partition.
There was a power outage while I was gone, and when I got back, it looked like one of the disks in md1 was…
Xiong Chiamiov
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RAID Monitoring
Is there any open source Dell H/w base RAID monitoring tool? Or any tool which monitors the hdd disks failure in RAID or power supply failure on Dell PE servers.
Ramesh Kumar
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Raid1 question
Let's say I have a software raid1 array from two partitions. I get one HDD out of the computer, and put it into another computer, and copy some data to the mirrored partiton.
What happens when I put the HDD back into it's original place?
Will the…
K. Norbert
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Dell PERC H700 - 3x RAID 1?
The configurator on Dell's website only allows me to choose up to 2 RAID configurations (for example RAID1/RAID10). The R710 allows up to 6 HDD's though, so I could do 3 RAID 1 arrays. Does the PERC H700 controller support this? Should I simply…
AX1
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3 Gbps or 6 Gbps SAS harddrives? Does it make a difference?
Is there a real-world difference between 3 Gbps and 6 Gbps SAS drives in a server? I keep reading that harddrives don't even fully saturate 3 Gbps yet, so 6 Gbps is nothing gained. I'm using multiple discs across RAID 10 if that matters. Thanks!
AX1
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RAID 10 Configuration: 6 x 146GB 15K RPM or 4 x 300 GB 15K RPM?
I am building a Windows 2008 R2 server which will host both Microsoft SQL databases and websites on IIS. Most likely a Dell R710.
I want to go with a RAID 10 for a mix of security and speed. I don't think I'm going to need too much space (databases…
AX1
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Which two disks can be safely removed from raid 10?
which two disks can I remove from RAID 10 without breaking the array?
near-copies means that there is raid like this?
raid0(raid1(sdaX, sdbX), raid1(sdcX, sddX))
= sdb and sdd can be removed
cat /proc/mdstat
Personalities : [raid1] [raid10]
md2…
Filip Svoboda
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Silent e2fsck - safe to stop?
Before a grow on a 8 TB RAID5, I am currently doing an e2fsck.
While the RAID was running w/o issues before (I switched from Ubuntu to CentOS 5.4 because I needed a specific hardware driver), the e2fsck initially turned up a boatload of errors…
Christian
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Why is striping not applied to harddisks internally?
This question bothers me for years now...
If it is inappropriate here, a valid answer would point me to the perfect place.
As far as I know, striping is used in several storage situations to speed up transfer rates: multiple hdd's in one computer,…
Ingo
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SSD RAID 1 and INTEL S5520SC
I've a server using INTEL S5520SC motherboard. I was wondering if it's possible to connect 2 SSD 128GB INTEL EXTREME drives in RAID 1 directly to this motherboard or would I need some kind of external controller?
Also will this work good, reliable…
MadBoy
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