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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3ware raid controller, unit unusable, several degraded disks

I was switching the disk drives in my server, running RAID 6 on 5 disks on a 3ware 9650SE controller, for newer disks and have run into a problem. The two first disks went fine, I took out one disk ...
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366 views

Migrating data from software raid mirror to ZFS mirror

With a setup with two disk is there a way to migrate from software RAID1 to ZFS mirror ? This kind of procedure would be inspired by the migration that is possible from a disk stored on a single ...
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2answers
997 views

How to install CentOs 5.8 on 3TB disk with RAID 1 on Hetzner EX 4S (10 TB) server?

I have installed centos 5.8 with Hetzner server rescue mode but its disk parttion table is in MSDOS formate which does not support more than 2 TB space of disk so i need to change the partition table ...
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1answer
3k views

Accidentally deleted wrong logical drive HP Smart Array P800 controller

I was tasked to do some rearranging on my company's HP Proliant storage server. In the p800 configuration utility I managed to delete the wrong logical disk, which was a 10 disk RAID 6 array. I'm just ...
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1answer
368 views

LSI 2208 9286-8e MegaRAID controller beeping when connected to 24-bay NexentaSTOR JBOD enclosure

I am getting beeping from the LSI external RAID controller even if I properly shutdown and there is no array re-initialization. Would I be required to use a battery back (BBU) with the LSI controller ...
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1answer
96 views

RAID: is it enough to have n+1 disks in a RAID6 array to match performance of a n disks RAID5 array? [closed]

As far as I know, RAID-6 has an even worse penalty on writes than its cousin RAID-5. But we also know that we can get more performance out of a typical RAID array by having more spindles in it. But ...
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0answers
204 views

RAID10 (4x SSD) system is super slow for 'dd' and 'find' commands

I have configured two servers each with 32 GByte RAM, 2x Xeon 2.4 GHz, 4x 480 GByte Intel SSD on a LSI MegaRAID SAS 9261-8i controller. They should be identical, however one of them has a very poor ...
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0answers
174 views

Corrupt XFS header

On my file server I ended up growing the RAID (5) and then I went ahead and deleted and remade the partition holding the XFS filesystem. I used Parted to do this. After parted ran I tried to mount ...
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1answer
193 views

Windows 2003 Near Freezing

Problem: Our server becomes very very slow (near freezing) if I copy a file from any directory on C: and D: to any other directory. In short It becomes very slow if I touch the hard disk. Currently I ...
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2answers
6k views

Resetting administrator password on Windows server 2008 R2 over Raid

I have locked both my administrator accounts out on my Windows Server 2008 R2 that has Raid. I tried the following- Insert the original Windows Server 2008 installation DVD Reset the computer, boot ...
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4answers
247 views

Which RAID for 16 SSD drives [closed]

My client just bought server with 16 SSD drives in it. What would be the best option to go for RAID? I want to use RAID 10 but I was wondering if I should do them in 4 x RAID 10 (4 drives each) or 8 x ...
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2answers
404 views

Pervasive SQL Server configuration

Our Sage 50 application takes a long time to load. We recently moved it to a newer server and the speed has improved but opening the application and accessing data is still time consuming and not ...
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2answers
2k views

SBS 2003 boot stalls at acpitabl.dat

I have a SBS 2003 server running for 3 year without any problems, and few days ago it freezes during the boot. System is using two 500 Gb drives in RAID1 (Intel Matrix 7.5) After trying to load in ...
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votes
2answers
2k views

mdadm stalls rebuilding a RAID5 array at 99.9%

I recently installed three new disks in my QNAP TS-412 NAS. These three new disks should be combined with the already present disk into a 4 disk RAID5 array, so I started the migration process. ...
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2answers
878 views

No drives showing on LSI 2008 SAS + HP SAS Expander

Followin this guide http://www.servethehome.com/supermicro-x8si6-f-motherboard-review-including-onboard-lsi-sas-2008-controller/ I got myself an RPC 4224 case (They are called Inter-Tech in Europe, ...
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2answers
2k views

fsck.ext3: Device or resource busy on server with RAID after power outage

I am recovering Dell Poweredge R510 server running Scientific Linux 5.5 after an unexpected power outage. The server was set up by our previous system administrator (I'm a grad student). Upon reboot, ...
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1answer
269 views

What would happen if the underlying OS running software RAID crashed?

For example, if I had either a Linux server running mdadm or Windows OS performing RAID at the software level, would data recovery be possible if the system crashed? Are there tools to access the ...
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0answers
419 views

Intel S2600CP4 SSD RAID 'corrupts' after a few boots

We've attempted to build an SSD RAID 1 using Intel server motherboards and SSDs a few times, using current and previous gen Intel boards. We can normally get through installing Server 2008 R2 x64, ...
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1answer
282 views

Two raid controllers in one HP ML350 G4 server

Here's the situation: I have running HP Proliant ML 350 G4 server, which already has Adaptec AAC-RAID controller and 2 HDD built as Raid-1. Now, I want to add another 2 HDD but for them I have another ...
3
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1answer
552 views

RAID-5 or RAID-6 - is RAID-5 really that bad? [duplicate]

Possible Duplicate: Which is better: RAID5 + 1 Hotspare / RAID6? I need to decide myself between RAID5 and RAID6. The servers have a hardware-RAID controller and 6 drives each. The ...
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0answers
263 views

Supermicro server with aftermarket MegaRaid

My company gave me a budget to build a VM server, so I bought a Supermicro server and saved some $$ by buying an aftermarket MegaRaid - 8308ELP (I know it's old, but it fit my needs and was cheap). I ...
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2answers
3k views

Dell Open Manage physical disk failure predicted

I've installed the Open Manage Server Administrator on my Dell T100 to monitor RAID Controller and disks. From the Physical Controller report web page I see a table listing the two disks I have but ...
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1answer
71 views

Arch Linux on Software RAID, can't find VolGroupArray

I am trying to install Arch Linux on a Software RAID that I am building following their instructions on the Wiki. I built as far as the Logical Volumes and after that switched to the Installation ...
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3answers
896 views

HP ProLiant RAID configuration [closed]

I have a HP Proliant DL 380 G7 Server with a RAID 5 that has 2 failed disks. My Question is, can i reduce the array to 3 hard disks that are remaining to work with them alone? Can I do this without ...
3
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1answer
758 views

How do I preseed a simple RAID5 setup on Ubuntu Server? [closed]

I have three 2TB drives in the machine; I want a RAID5 of ~4TB capacity, and 100GB or so of swap space. No LVM, no encryption, no fanciness. This is easy to do using the interactive installer, but I'm ...
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1answer
145 views

Migrate Windows Dynamic disk RAID5 to Linux LVM

Is this even possible, do I have the right tool in mind? I have 3 disks that are running as a software RAID5 using windows. I would like to migrate box to Linux without experiencing data loss. Am I ...
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1answer
114 views

Where to put system partition on 12 disk hardware raid setup

I'm going to rent a server with 12 SATA disks hardware raid(planned to be configured as raid5), and I'm wondering what's the best practice where to put system partition in that case and the most ...
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1answer
288 views

replace SCSI raid controller with SATA on SBS 2003

Is it possible to add a second raid card (there is a second pci-x slot) that uses SATA and transfer the current contents of the SCSI card's HDDs to the new larger SATA HDDs Background: I bought 2 new ...
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2answers
1k views

Bypass perc s300 on R210 II

Trying to install esxi on a Dell R210 II. This is an older machine and as such has Perc S300 controller. Apparently, this controller is only compatible with windows systems and there is no way to ...
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2answers
1k views

Ubuntu 12.04 LTS Update - With Error: “YOUR SYSTEM IS NOW UNBOOTABLE!”

I just did an apt-get dist-upgrade and saw the following error: cryptsetup: WARNING: failed to detect canonical device of /dev/md1 cryptsetup: WARNING: could not determine root device from /etc/fstab ...
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2answers
192 views

Vmware 5.1 Essentials Host with Ubuntu VM - Should I Raid the Guest OS [duplicate]

Possible Duplicate: Is it necessary to have RAID in a virtual machine? I am in the processing of building up a new VM Host with Essentials 5.1. The server will house several guest OSes ...
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2answers
1k views

Unable to mount a 18TB raid 6

i receive the following error when i try to mount my raid 6 on Ubuntu Linux mount /dev/md3 /mnt/md3 mount: File too large i have another raid 1 existing (2TB only) and working fine .. any ideas? ...
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0answers
174 views

mdadm drive UUIDs chanaged, can they be changed back?

So I ran into this trouble and I believe I lost all my data..However I found an old mdadm --examine --scan file I made a month ago and an old mdadm.conf....Is it possible to use these two items to fix ...
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2answers
9k views

mdadm rebooted, array missing? can't assemble?

Not sure what is going on with my Array. I rebooted ubuntu 12.04.1 and got a error on startup that fstab couldn't mount the filesystem UUID I have for my mdadm array. After running a few commands a I ...
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0answers
449 views

ESXi 5.1 local datastore no longer accessable

I'm running ESXi and just recently rebuilt a raid array, and now an existing local datastore is no longer accessable in ESXi. The details: Original Configuration: 1x usb drive (on the backplane) ...
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votes
1answer
908 views

smartctl not actually running self tests?

I want to run the smartctl self tests to check the health of the drives in my RAID array (PERC 5/i). The array is on sda and comprises six drives. I can check the status using sudo smartctl ...
2
votes
3answers
192 views

Will a raid cache be better for performance than hard drive cache speeds?

In a device that has raid 5, and a "raid cache" of 4GB, does this help performance? I have 32MB cache hard drives but I was wanting to know if the 4GB cache will make up for the difference in ...
3
votes
1answer
6k views

Proliant server will not accept new hard disks in RAID 1+0?

I have a HP ProLiant DL380 G5, I have two logical drives configured with RAID. I have one logical drive RAID 1+0 with two 72 gb 10k sas 1 port spare no 376597-001. I had one hard disk fail and ...
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3answers
5k views

Dell PowerEdge 2950 getting PCIe Degraded Link Width Error : Internal Storage Slot

I have a Dell PowerEdge 2950 getting a "PCIe Degraded Link Width Error : Internal Storage Slot" its out of warranty so I can't harass Dell about it, thought i'd see if anyone here has experienced ...
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2answers
155 views

How do RAID 0 Offers improved i/0? [duplicate]

Possible Duplicate: What are the different widely used RAID levels and when should I consider them? I wonder how RAID 0 offers better i/o. If i am not wrong in RAID 0 data gets split and ...
3
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1answer
2k views

Smart Array P400i Physical Drive failed after being replaced

We have replaced the bad drives in a few HP systems (ProLiant DL360 G5), but they continue to show failed. The drives are part of RAID, and I think this might be why they are appearing as failed. The ...
3
votes
1answer
51 views

How does a Promise FastTrak 133 interleave a striped array?

I co-worker had two drives configured as a stripe on a motherboard with an on-board Promise FastTrak 133. The motherboard failed, and we've been unable to find any others with an on-board Promise ...
3
votes
2answers
1k views

What are the recognized ways to increase the size of the RAID array online/offline?

Is it possible, in theory, increase the size of the RAID-array of any level just by adding new drive(s)? Variant like "backup whole data -> delete old array -> add/replace disks -> create new array -> ...
3
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1answer
868 views

moving raid 10 to another identical server both on Smart Array 6i controllers

I have dead HP DL 380G4 with RAID 1+0 with 1 logical volume from 4x72GB drives on built-in Smart Array 6i 128Mb BBWC. It was shut down properly. It seems it was usual death for Proliant with ILO led ...
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1answer
191 views

HP P410i RAID10 performance causing Xen to crash

It seems HP P410 RAID card is causing some of my servers to crash when under high IO. Configured RAID10 with 4x SAS 15k HDDs. Is this normal? Do I need some other hardware to add to the RAID card ...
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2answers
184 views

Swapping 3Ware Raid Card - Best Procedure

We have a server running an old firmware version and driver (just took this position) on the 3Ware 9650SE Raid Controller... We have been having issues with the server and seemed to have narrowed it ...
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1answer
348 views

Can the Intel C600-series SAS controller RAID SATA drives?

(Sorry if this is off-topic - technically this is a home workstation setting, but is regarding mostly-server technology.) I have a GA-X79S-UP5-WIFI motherboard and four ST3000DM001 drives, and the ...
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2answers
572 views

Mid-2011 Mac Mini Server keeps dropping a disk from RAID, not sure what to do about it

The small business that I do sysadmin work for on the side uses a mid-2011 Mac Mini Server (running 10.7 Lion) as a fileserver and FileMaker database host. Its 2 750gb HDDs are RAID 1'd together, and ...
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1answer
3k views

end_request: I/O error, dev sda, sector xxxxxxxxx

I have a IBM server. This server contains 3 hard disk with RAID 5. It was working fine earlier. Unfortunately this machine got the following error message. After that I have rebooted the systems. ...
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1answer
519 views

LSI RAID-on-chip with RAID6 over two SAS links goes red when HDD enclosure is powered cycled; how to recover?

I have a RAID6 array managed by LSI 9286-8e card. I also have Sans Digital 24-bay NexentaSTOR JBOD enclosure with SAS extender built-in. They are connected to separate UPS devices. Normally, I'd ...