RAID, an acronym for Redundant Array of Independent Disks (sometimes incorrectly referred to as Redundant Array of Inexpensive Disks), is a technology that provides increased storage functions and reliability through redundancy. -Wikipedia

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3
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2answers
18k views

Can't enter HP SmartArray P410 RAID ORCA set-up on HP ProLiant DL320G6

I've just installed an HP SmartArray P410 controller into my HP ProLiant DL320G6 server. The controller seems detected by the server BIOS (it shows up in controllers list in the BIOS set-up), hard ...
0
votes
2answers
728 views

RAID disk failure - Replace disk or whole array?

I have a 5 disk Raid5 array of Western Digital Green (WD10EADS) 1TB. Raid5 is via Windows Server (software raid). One disk has failed, and it looks as though I can't get the same model replacement. ...
4
votes
1answer
343 views

How to recreate a RAID 10 array with mdadm

So our virtual machine has broken (it's actually a Linux machine in Azure) on which we were running a RAID10 array of 4 disks. It's an ubuntu box. From what I can tell the four data disks are fine, ...
0
votes
1answer
263 views

Smart Array P212 Raid controller on SBS 2008 ProLiant G6

I had a mirrored array with 2 * 1TB drives. I have replaced both drives (one at a time and allowed it to rebuid) with 2 * 2TB drive. So I now have a capacity of 2TB rather than 1TB. However, the array ...
5
votes
4answers
2k views

Is it necessary to have RAID in a virtual machine?

I have a Windows 2008 Enterprise on RAID 10 running Active Directory, Hosted Exchange, and a web server on HyperV VMs. Do I need a virtual RAID for Exchange? If so, why? Edit: thanks everyone for the ...
4
votes
1answer
2k views

Does a RAID 1 really protect from HDD failure?

If using a RAID 1 and if there are any inconsistencies between both disks found, data is copied from the primary disk (most likely the one with the lower port number) to the secondary disk. 1) But ...
1
vote
1answer
659 views

Rebuild Linux raid1 after os reinstall

I have 4 disks in my server. sda and sdb were combined to RAID1 and had the operating system. sdc and sdd were a second RAID1 device that had a single volume group with a bunch of LVMs. sdd died so ...
1
vote
2answers
154 views

Software raid10 failed with 3 disks

I have 4 disks, multiple partitions and from some partitions raid10 arrays. Something went wrong and three disks "failed" at the same time (i think it was a software problem, disks are ok). Now I have ...
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votes
1answer
78 views

Moving from 80gig raid to 500gig [closed]

A client has a 80gig hd in a raid set, he would like to increase his hard drive to at least 500gig. What is the best way to do this? He would like to keep all his configuration, he has windows 2003
4
votes
3answers
1k views

mdadm RAID 5 Failed with 2 Drives while rebuilding

I have a RAID 5 array with 3 Disks (sdb sdc sdd) Over last weekend I was prompted that sdd had failed. so replaced the drive, added it back into the array and let it rebuild (1.5TB) It stopped at ...
1
vote
1answer
156 views

ML350 Using both p800 and e200i

I have an ML350 G5 with a P800 and the integrated e200i. I'm using the P800 to service the main drive cage with 6 SAS drives in RAID 5. However, I would love to also convert some of the unused 5.25" ...
5
votes
1answer
669 views

Is it is possible to replace one array to other new 8 HDD array in HP RAID 1+0 without losing data on old array?

Currently, I have 4 hard disks which have been configured as RAID 1+0 in HP Proliant 380 G7, SmartArray p410i. I am planning to buy other new 8 hard disks to replace old array by swapping the disks ...
4
votes
2answers
83 views

LVM Configuration possible?

I have hard discs D1 and D2 which are 140GB each and D3,D4 which are 600GB. I've been reading about the benefits of using LVM and I was thinking about the following configurations. This one would ...
0
votes
1answer
1k views

PERC 5 RAID disk with foreign data

I have a RAID array built with 5 SAS drives (RAID 5). I finally got in the last drive the other day, and, not surprisingly, it has some foreign config on it from the last array it was part of. So I ...
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votes
1answer
3k views

Extend RAID 5 to use unused space and add additional disks?

I am new to RAID. I want to extend an existing RAID 5. The current setup is as follows: Array A unused space : 349956 MB logical drive :1 total size 273GB raid5 disk : /dev/cciss/c0d0 physical ...
-4
votes
2answers
91 views

Raid array showing only the capacity of one disk [closed]

I've a dedicated server with an raid array with two disks of 1TB each, this is what I get with mdadm --detail /dev/md1 /dev/md1: Version : 1.1 Creation Time : Wed Aug 1 20:20:14 2012 Raid Level ...
-2
votes
2answers
2k views

RAID 10 vs RAID 1 SSDs [closed]

I'm considering moving a large database from mechanical disks to SSDs. My initial instinct was to go for RAID 10, but further research suggests that this configuration can significantly reduce the ...
0
votes
2answers
4k views

Increasing occurrence of “BBU disabled” messages

Until recent my Intel RAID controller (SROMBSASMR) had a monthly occurrence of "BBU disabled: changing WB logical drives to WT", followed about 2 1/2 hours later by "Battery relearn complete". Since ...
1
vote
1answer
384 views

RAID 5 has no READ speed advantage over single drive?

I have recently acquired an Intel SASMF8I raid card for my office. I have 5 x 1TB disks and have created two arrays, 3 x 1TB RAID-5 and 2 x 1TB RAID-1. The second drive is for sensitive/vital data and ...
0
votes
2answers
1k views

Dell PowerEdge 1950 how use “raw” disk instead hardware raid Perc 5/i

I have Dell PowerEdge 1950 with hardware raid Perc 5/i. I want use software raid md/lvm. Is any way to totally disable this raid and see "raw" sata disks? I play alot with BIOS , enable SATA, ...
1
vote
1answer
635 views

Theoretical IOPS value for a Raid Controller/Raid Array [closed]

Gents, We have a database server (Oracle), its raid array is read intensive... Raid Controller type: 04:00.0 RAID bus controller: Hewlett-Packard Company Smart Array G6 controllers (rev 01) ...
2
votes
2answers
778 views

mdadm RAID1 with harddisks of different blocksize

After a crash I had to replace one of my HDDs (namely sdd). The old one (and the one left - sdc - and the md0 itself) use a blocksize of 512 Bytes. The new drive has a physical blocksize of 4K. The ...
0
votes
1answer
590 views

IBM ServeRAID 8k level 1 critical

This is my setup: Lenovo ThinkServer RD140 IBM ServeRAID 8k controller Four Seagate Barracuda 1TB hard discs, organised in two RAID-1 arrays Now the third disk is defunct (orange light flashing). ...
-1
votes
2answers
922 views

Determining the software RAID configuration on an Ubuntu server

I have an Ubuntu box which was installed by an admin who is not with me now. I have no information on how he configured the RAID and neither no experience on setting up a software RAID on Linux ...
1
vote
1answer
497 views

Encrypting iSCSI Volume attached to Windows Server using Truecrypt

I'm using a QNAP-439 Pro II SAN. Full disk encryption is currently enabled. But since you take a 80% performance hit by enabling encryption I'm thinking about disabling encryption on the SAN and ...
0
votes
1answer
101 views

Disk array for virtual machines [closed]

Is there any recommened array for placing the disks of a virtual infraestrcture. As example, I heard that for the OS disk is recommened a mirror array. For placing virtual hard dkis which is ...
3
votes
1answer
306 views

Meaning of unused space in RAID arrays

I'm using the hpacucli command line tool to check the raid arrays in my server. What does "SAS, Unused Space: 0 MB" mean? # hpacucli controller all show config Smart Array P410i in Slot 0 ...
2
votes
0answers
187 views

Is there an alternative for the Intel WebConsole for managing the RS2WG160 RAID controler on Ubuntu?

I have a server with 16 HDs connected on an Intel RS2WG160 Raid controller and I would very much like to know the state of the disks using the Web Console that Intel provides. The problem is that ...
0
votes
1answer
1k views

Advice: Configuring Old PowerEdge 2950 For Virtualization [closed]

I'm picking up the following old server from geeks for a satellite office: Two (2) Intel Xeon E5430 2.66 GHz quad-core processors 16 GB DDR2 PC2-5300 Fully Buffered (FB DIMM) SDRAM 12 MB L2 cache, ...
0
votes
4answers
678 views

Is it possible to recreate a raid 1+0 array without losing data

I have a HP smart array 6400 raid card and a 4 1TB raid 1+0 array, I was informed the power would fail for a shor time this afternoon. So I powered off the array and was surprised to find out that my ...
0
votes
2answers
126 views

Does intel matrix raid 1 setup require raid enabled hard drives

Hi I have a failed drive on a server running intel matrix raid array RAID1, I can't get the same model drive anymore to replace the missing one as it is 5 years old. Can I use a regular type ...
1
vote
1answer
1k views

Ubuntu software raid on efi, how to boot off second drive?

I'm up and running on Ubuntu server with software raid 1 with 2 500GB drives and I'm just trying to test things out. If I unplug the second drive I'm able to boot in degraded mode but if I unplug the ...
1
vote
2answers
1k views

Advanced configuration of Grub2 for RAID5 + Encrypted LVM where /boot needs redundancy

I recorded my complete installation until failure in case you have a question about the installation which I did not provide an explanation for below: http://www.youtube.com/watch?v=BVe5vja3keo ...
1
vote
2answers
392 views

Are there different kinds of Mini SAS to 4x SATA reverse breakout cables?

I have an RPC-4224 case that has 24 bays with 6 Mini SAS ports. I needed a cable to break out one of them into 4 SATA ports, so I went down to my local Fry's Electronics and bought one. The cable came ...
0
votes
2answers
377 views

RAID 0 for better MySQL performance [closed]

I have initiated AWS high I/O instance. I will like to know if MySQL will perform better with RAID0. As per the following article... ...
0
votes
2answers
3k views

how to know what is disk uuid for md raid1 and hdparm?

ive got md0 (raid 1) array and want to make write cache off on them during system boot (ubuntu 12.04 server). md0: /dev/sda /dev/sdc blkid: /dev/sda: UUID="3e502de5-696d-f4b4-470e-XXX" ...
0
votes
1answer
175 views

Fujitsu BX600 S3 with 10 x BX620 S4 Blade Servers + QNAP TS-EC1279U-RP — SETUP

I have the following hardware: Fujitsu BX600 S3 Chassis 10 x BX620 S4 Blade Servers QNAP TS-EC1279U-RP APC Symmetra RM 6kVA 6000VA SYH2K6RMI HP PROCURVE 2510G (J9280A) What I would like to do: ...
3
votes
1answer
1k views

In what use case is a RAID 1E preferable to a RAID 5 array on a 3 disk array?

This question has got a bunch of us talking in chat, and it had me wondering: Most of RAID 5's ugly characteristics like UREs and long rebuilds present themselves in much larger arrays. With a RAID ...
3
votes
2answers
603 views

Ext3 Stride/Stripe-Width Calculation for 3-Disk Software RAID1E

For reasons too complex to get into here, I'm using a 3-disk RAID1E on some linux systems. See here for more info on that. So my understanding is that for optimizing filesystem layout on this ...
1
vote
1answer
120 views

Can I use an HP Smary Array SAS Controller Card In Non-HP Server? [duplicate]

Possible Duplicate: Proliant raid controller in a PC There are a bunch of cheap HP Smart Array SAS controller cards on ebay and I'm wondering if they will work with non HP servers ...
0
votes
1answer
45 views

Linux Raid5 faulty array

Facts first: mdadm --examine /dev/sd[abcd]3 |egrep 'dev|Update|Role|State|Chunk Size' /dev/sda3: Update Time : Thu Jul 19 22:42:40 2012 State : active Chunk Size : 64K ...
0
votes
2answers
855 views

Ubuntu 10.04 LTS and Dell T410 Raid

I have a Dell T410 server with a RAID (Perc) card on it and 3 disks of 500GB. When I boot the server, I can see the configuration as Raid 5. But when I try to install Ubuntu 10.04 LTS, I always see ...
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votes
2answers
600 views

RAID 3 Write Penalty

I'm wondering what the write penalty is for RAID 3? I know for 5 it is 4, and 6 is 6, but I'm not entirely sure how it would work for RAID3. The thing that confuses me a little with raid 3 is the ...
3
votes
3answers
2k views

adding additional disks to existing RAID 5

I have been handed the challenge of adding 4 additional drives to an IBM ThinkServer with a RAID 5 array on an MS Windows Server 2008 Std. living life as a SQL server. First question is "is it even ...
0
votes
2answers
357 views

C drive shows as RAW, but Windows booted, cannot access C

I have a server running Windows 2003, it has a hardware RAID controller (4 disks in RAID5, health all OK) The server will boot into standard mode or safe mode (from the array) but once windows is ...
0
votes
1answer
537 views

Rebuild doesn't finish after raid1 disk replacement

In one of our servers one of the disk failed, no worries it happens all the time, we replaced the bad disk following the usual procedure but then ... 'the horror', after adding a new disk one of the ...
-2
votes
4answers
437 views

How can I create one big volume from multiple drives, but loose only the files stored on one disk if it fails?

I am running a storage system. Fault tolerancy is handled at application level (files are stored on multiple servers, even datacenters). Therefore I don't need nor even want redundancy within one ...
0
votes
5answers
15k views

Getting VMWare ESXi 5.0.0 with RAID using the Intel X79 chipset to work

I have bought a new server where I use the motherboard ASUS P9X79 WS X79 S-2011 ATX. It will be used for virtualization, preferably using VMware vSphere Hypervisor™ (ESXi) if I can get the RAID on my ...
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votes
1answer
135 views

xenserver 5.6 without raid [closed]

The domU in my environment is a xenserver 5.6 fp1 installed on a regular desktop with intel board and i3 processor. I have 8GB or RAM installed and 1 500GB SATA HDD. Obviously, i don't have RAID and ...
0
votes
1answer
499 views

How to resize two RAID-1 partitions?

I have an Ubuntu 12.04 server with two 3TB disks and Software-RAID 1. Currently they are partitioned as follows: # discus Mount Total Used Avail Prcnt Graph / ...