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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4
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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
989 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 ...
-3
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
89 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
383 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
614 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
757 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
575 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
889 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
490 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
300 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
184 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
668 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
125 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 ...
0
votes
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
371 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
368 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
167 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
588 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
44 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
852 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
574 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
351 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
534 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
434 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 ...
-4
votes
1answer
134 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
493 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 / ...
1
vote
2answers
278 views

RAID issues - running mkfs on /dev/md0

I had some issues mounting my RAID array in that an error was thrown saying that an ext3 filesystem could not be found on /dev/md0. So, maybe stupidly, i ran mkfs -t ext3 /dev/md0 - has this ...
-3
votes
2answers
288 views

megaraid 8308ELP upgrade Recommendation [closed]

I have a Gateway E-9525R 2U, and I am looking to replace the raid card (an LSI 8308ELP) What I need (in order of necessity) is Vsphere Esx 5 compatibility Dual SFF-8087 (as it has a 6x backplane) ...
0
votes
1answer
5k views

In a server with WS2012 Storage Spaces, do I still need hw/sw RAID? [closed]

I'd like to utilize Windows Server Storage Spaces (introduced in Windows Server 2012) to increase resiliency against harddrive failures. It is a small server, high performance is not a priority and so ...
-1
votes
1answer
2k views

Adaptec 6405 RAID controller turned on red LED

I have a server with an Adaptec 6405 RAID controller and 4 disks in a RAID 5 configuration. Staff in the data center called me because they noticed a red LED was turned on in one of the drive bays. ...
3
votes
1answer
2k views

Convert RAID-0 to RAID-1 on HP ML350G6 with P410i zero memory

I have an HP ML350 G6 with a P410i zero memory RAID controller. As far as I can understand that means I can't expand a current single drive "RAID-0" configuration to a RAID-1 using the HP Offline ACU ...
3
votes
1answer
917 views

Moving 4 Ubuntu software “RAID” disks to a new computer - How to make sure it works immediately?

Thinking in terms of the future, let's say I buy 4 external disks, set them up with Ubuntu Server 12.04 software RAID 1+0. Then later after some usage I want to stick them on a new computer - how do I ...
1
vote
1answer
7k views

Access RAID configuration in x3550M2

I'm trying to configure RAID in a IBM x3550 M2 server. I can't find any messages on boot about any hotkey to access the configuration utility. I wasn't able either in BIOS. The card is a on board LSI ...
3
votes
2answers
405 views

Reading off of MDADM drives after server died

I had a 2-drive RAID-1 array running on ubuntu, which I had forgotten about. The host I was running them on is now dead, leaving me with these two disks. How can I get data off of them? If I dump ...
0
votes
1answer
423 views

Rebuild Raid 6 Array instructions

I have an HP Server with a HP P400 Controller with 8 72GB drives in a Raid 6 array. I had a drive fail and replaced it, but it did not rebuild because I have Hard Read errors on 2 other drives, so I ...
0
votes
2answers
1k views

smartd: Device: /dev/sda, FAILED SMART self-check. BACK UP DATA NOW

System: Centos 5.5 64bit RAID: Linux Soft RAID with 2 Disks Mirror Smartd complains about the disk failure in system log: [root@xxx ~]# tail /var/log/messages Jul 3 10:22:45 w11 smartd[6043]: ...
2
votes
2answers
218 views

How to monitor HDD temperatures in HW RAID

I have 4 disks in 2 RAID1 mirrors on a Hewlett-Packard Company Smart Array. The OS is Ubuntu 10.04, cciss driver - so it's a hardware RAID We recently moved our office and the servers are in less then ...
4
votes
5answers
721 views

Ubuntu server has slow performance

I have a custom built Ubuntu 11.04 server with a 6 disk software RAID 10 primary drive. On it I'm primarily running a PostgreSQL and a few other utilities that stream data from the web. I often find ...