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
2
votes
1 answer
SQL Server on EC2: What way do i set up the EBS
Good morning.
We have a service with a SQL box on Amazon EC2 and, as suggested on this question, we are using EBS to store the data... the problem is, What is the best way to setup the storage?
At the moment, during the Development phase, we have 4…
TiernanO
- 744
- 7
- 17
2
votes
4 answers
mdadm assembles with drives instead of partitions
I have a RAID 5 array built from partitions on 5 drives - /dev/sda1, /dev/sdb1, /dev/sdc1, /dev/sdd1, and /dev/sde1. When I assemble the array manually, it works fine.
Unfortunately, there seem to also be superblocks on /dev/sdb and /dev/sdc…
colinmarc
- 197
- 1
- 7
2
votes
7 answers
Installing Windows Server 2003 on a TYAN MB with SATA RAID
I'm trying to install Win 2k3 Server on my new TYAN S5350 Motherboard. The controller is configured for a RAID 0 with 2x 500Gb Harddrives.
I made a floppy disk with the drivers but it doesn't work: maybe the floppy disk drive is too old, I don't…
waszkiewicz
- 1,002
- 3
- 17
- 36
2
votes
1 answer
Recovering Accidentally Destroyed LVM2 Information
Ok, so I'm stupid and made a serious and grave mistake. On my linux box running Ubuntu 10.10, I have a 1.5TB RAID array that I had originally setup using the instructions located here: http://www.gagme.com/greg/linux/raid-lvm.php The RAID array is a…
Streeter
- 123
- 5
2
votes
3 answers
Which RAID5 configuration is faster?
I have RAID controller with 24 SATA disks.
Which configuration is faster?
One RAID5 with all disks.
Six RAIDs with 4 disks in each group.
d_pilot
- 323
- 1
- 5
- 12
2
votes
2 answers
Partions, RAID, LVMs, and Encryption
I have an existing production server that is running 4 drives each 750 GB in size in two software RAID levels. RAID 1 for the /boot partition and RAID 5 for the rest of the partitions including the /share volume that is used for serving files to…
John
- 2,276
- 7
- 44
- 60
2
votes
3 answers
How to undo an mdadm RAID 1 without losing data
I have a two disk, RAID 1 set up from mdadm. Long story short, turns out this server has an actual RAID controller, so a hardware raid would be more preferable than the software raid. In addition, the software raid has unexpected disconnects to disk…
Safado
- 4,786
- 7
- 37
- 54
2
votes
2 answers
Testing RAID
How does one fully evaluate a RAID configuration?
Pulling drives is one thing, but are there tools and techniques for more?
I've considered putting a nail through a running drive (powder actuated nailgun) to see what would happen, or simulating…
Adam Davis
- 5,446
- 3
- 37
- 52
2
votes
1 answer
SuperMicro RAID card requires 12 Volt Enterprise hard drives?
SuperMicro AOC-USAS-S8iR RAID cards
Western Digital Scorpio Black WD1600BJKT
SuperMicro 1026T-UF chassis
I have a dozen servers. I need RAID for redundancy only, not for performance i.e. I don't "need" the speed of 10,000 RPM Raptor drives and I'd…
caleban
- 1,116
- 5
- 18
- 34
2
votes
2 answers
Setting up Multi-server Infrastrure? Advise the best options
We are setting up a number of Virtual Machines (around 250) for a customer who is basically using an application written in LAMP + Java with a bit of customizations in each of these 250 instances. Essentially each app can be considered as a web app,…
ramdaz
- 685
- 1
- 10
- 26
2
votes
3 answers
IBM ServeRAID M5015 how do I view info from Ubuntu?
I have an IBM x3620 M3 server that has
root@web26:~# lshw -short
/0/100/9/0 scsi4 storage LSI MegaSAS 9260
/0/100/9/0/2.0.0 /dev/sda disk 1990GB ServeRAID M5015
hardware raid controller.
How do I view the RAID array status, SMART status and issue…
Alec Matusis
- 191
- 1
- 2
- 8
2
votes
2 answers
mdadm fail, disk won't show up
One of my disks failed in my raid array:
cat /proc/mdstat:
Personalities : [raid1]
md1 : active raid1 sda2[2](F) sdb2[1]
488086720 blocks [2/1] [_U]
md0 : active raid1 sda1[0] sdb1[1]
192640 blocks [2/2] [UU]
When i tried to remove…
fabrik
- 527
- 1
- 7
- 18
2
votes
3 answers
Can a Dell Poweredge R200 server be connected to HP D2600 Storageworks Disk Enclosure?
Can I setup a Dell Poweredge R200 server to use a HP D2600 Storageworks Disk enclosure by using a controller such as PERC 6e or the HP p412 / p410 (??) or other compatible controller in the Dell R200?
If it is possible, which controller would be…
Edward
- 21
- 1
- 3
2
votes
2 answers
Combining Raid disks with LVM... does it defeat the purpose of the raid?
I have been tasked with adding some large disks to a server that is several years old. The raid card in this server can support 12 disks, but its age prevents it from achieving any raid disk > 3TB.
I know a lot about RAIDs but not a lot about…
Jake Wilson
- 8,814
- 29
- 97
- 125
2
votes
3 answers
Best RAID Config for Hyper-V using 3x 750GB 7200RPM SATA Drives?
I am looking to virtualize 3 - 5 small low resource servers to one Dual QuadCore box. The box currently has 3x 750GB drives available. What would be the best RAID config? I am leaning toward RAID1 but wanted to get other opinions before I pulled…
Frank Owen
- 115
- 1
- 1
- 9