Questions tagged [raid-5]

A type of RAID redundancy that includes parity data spread across a number of member disks

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0answers
491 views

Disk utilization 100%, no read or write

Our disks on one of our servers are showing 100% utilization but no read or write. here is the output of iostat -xc 1 and errors on syslog https://gist.github.com/4110533 status info from raid card ...
2
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1answer
4k views

LaCie NAS failed - Recover Raid 5 From bad device

here is my problem: I have a 5disk (Seagate 2To) RAID5 working with a NAS LaCie 5big. Each disk is still working but the NAS device has failed and it refuses to boot with HDD inside (LaCie helpdesk ...
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3answers
17k views

Why is RAID5 disabled in windows 8?

I want to create a RAID 5 array in windows 8 with 5 Dynamic Hard Disks and it is grayed out. If this is not possible why not hide that option. If it is possible why it is disabled? after your ...
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3answers
30k views

How to force mdadm to stop RAID5 array?

I have /dev/md127 RAID5 array that consisted of four drives. I managed to hot remove them from the array and currently /dev/md127 does not have any drives: cat /proc/mdstat Personalities : [linear] [...
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0answers
583 views

RAID 5 array degraded - Intel Matrix Storage Manager suddenly says all 4 disks are “Non-raid disks”

Long story short, I have a linux (ubuntu 10.04 LTS) server with a 4 disks configured as a 2 TB RAID 5, set up with Intel Matrix Storage Manager v8.0.0.1038 in BIOS. My power went out, and the UPS ...
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2answers
5k views

Debian installation and RAID5

I just bought a HP Microserver for use it as dns, http, vpn, file storage and also for backups of other computers at home. I already have 2 1Tb HDD's, so I thought to buy another 2 HDD's and install ...
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2answers
1k views

FreeNAS RAID5 Server - CPU Choice

What factors should you consider when choosing a CPU for a FreeNAS server? What are the implications and limitations based on CPU in this context? Currently I'm looking to build a FreeNAS server ...
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1answer
309 views

Hardware RAID 1 With ERC/TLER/CCTL

I am aware of the problem when using standard consumer-grade drives with RAID levels 5 and 6; if a drive takes too long trying to read and/or repair a bad sector, it will be dropped by a hardware RAID ...
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2answers
2k views

Testing software RAID5 by pulling a HDD live. Bad idea?

I'm running Ubuntu Server 10.10, with software RAID5 and LVM running on top of that. I have four 2TB HDDs. I also have a separate boot drive with incremental full-system snapshots that run every four ...
0
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2answers
109 views

Intel Matrix Raid and Raid5

I suffered failed raid0 and now I'm buying 3x1TB drives to setup raid5 on Intel matrix storage manager that comes with my MoBo (Ausus 5pk-e). The questions is: how safe am I with the decision (raid5 ...
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1answer
13k views

How do I tell mdadm to start using a missing disk in my RAID5 array again?

I have a 3-disk RAID array running in my Ubuntu server. This has been running flawlessly for over a year but I was recently forced to strip, move and rebuild the machine. When I had it all back ...
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1answer
540 views

A weird issue relate to ext4/lvm/raid-5 after partition recovery

I have 3 hard disks, in the following paragraphs named /dev/sda, /dev/sdb and /dev/sdc, newest came first. Note: /dev/sdc has one primary partition /dev/sdc1, one extended partition /dev/sd2, and 3 ...
1
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1answer
89 views

GRUB only sees first of 2 identically-configured drives in RAID 5 array?

Has anyone ever come across a case where of the two (virtual) disks that are members of the same hardware RAID 5 array (LSI 9750), GRUB can only see the first? It's a 100% hardware RAID 5, to the ...
0
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1answer
809 views

Safety of Truecrypt for Large Raid5 using ubuntu, mdadm, lvm, ext3?

I'm planning to set up a large (probably 6-9Tb) raid-5 array on ubuntu using mdadm, lvm and ext3. Does anyone have any opinions or suggestions on the safety of using a Truecrypt volume for that amount ...
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1answer
314 views

RAID5 + Samba Woes

I'm in the process of setting up a brand-new CentOS 6.2 server. The boot, swap and root partitions live on a 320GB SSD, and my archive files are on a 9,000 GB RAID array. Problem is that if I setup ...
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1answer
934 views

Adding Space to RAID5 using mdadm, lvm and ext3

I have seen a few descriptions about using mdadm with lvm to create an easily expandable raid, such as this question, but I still think I'm missing something. Say that I create the raid using mdadm ...
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1answer
2k views

Will this RAID5 setup work (3TB Seagate Barracudas + Adaptec RAID 6405)?

As the title states, will this RAID combo work, and if not what needs to be changed? Overall opinions would be most helpful. I currently run a small file server of about 5TB or so. I keep outgrowing ...
0
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1answer
221 views

How to expand Raid 5 on ICH10 - Gigabyte ex58-ds4?

I was wondering if there is a relatively simple way to expand my HD space. My setup is 4 x 640 GB drives. Motherboard has 4 ports on 1 controller and 2 ports on another controller, however they can't ...
2
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1answer
2k views

Filesystem corruption (?) and appropriate use of fsck

Last week at work, our linux server (CentOS 5.5) was unresponsive to log in attempts, so I had to hard shut down it. After pulling out a couple of disks, on boot up it reported a degraded raid array ...
0
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1answer
173 views

ReclaimMe Recovery of the Table used to identify member disk in RAID 5 array

I have seen this issue posted on many forums with only one possible solution (suggested below) and before I attempt I thought the community could weigh in on this solution and then we can share it ...
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1answer
531 views

Restoring Raid 5 Meta data / Table

2 part question at end of this text My problem: My CMOS was cleared, BIOS was set to IDE instead of RAID. My understanding (from other sites) is that motherboard Intel ICH10R data is stored in BIOS ...
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1answer
880 views

RAID 5 Recovery Reset CMOS and drives show up as 2 Member 4 non-Member

How do you restore a raid array (not part of your C drive) after resetting BIOS and installing a new C (Windows) drive. My setup: (its a LOT of data, i cannot afford to lose it, most of it is ...
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1answer
602 views

Disk durability when using RAID 10 vs RAID 5

Most of the time technical articles about different RAID levels mostly about how redundant they are, how fast on read/write etc. But I can't find information about would a disk in a certain RAID live ...
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0answers
2k views

mdadm raid5 read error not correctable

I have a software raid5 setup existing of 4 disks. sda, sdb, sdc, sdd Since everything was up and running I wanted to test the array. To do this I pulled the plug on one of the disks (sdd). Everything ...
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3answers
2k views

Is it better to partition hard drives for a RAID?

I have four 1TB hard drives and want to set them up in a RAID (5). Some calculations: 4x1000G = 3000G usable space 8x500G = 3500G usable space 16x250G = 3750G usable space Does this mean it will be ...
27
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2answers
81k views

Can I set up a RAID 5 with a bunch of drives of different sizes?

I currently have 3 1TB drives, a couple 500GB ones and some 750GB ones. Can I put them all in a RAID 5 configuration or do they need to be of same size?
2
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1answer
431 views

RAID5, Can you clone the drive and access the media from Windows?

So my server is about to die and all of a sudden my RAID5 isn't accessible anymore. Is it possible to access the files on those drives some other way? Like maybe plugging them into another comp, ...
2
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0answers
1k views

Recover data from Dynamic Disk (MBR) bigger than 2TB

Here is the situation: Promise Array FastTrak TX4310 with 3 disks (750 GB each) in RAID5. This comes to around 1500 GB of data. Last week I had the idea of expanding the RAID with an additional 750 ...
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0answers
294 views

What caused my RAID 5 array to become corrupt?

My machine has an Intel ICH9R RAID controller built in to the motherboard and an additional SIL3124 controller. I had two 1Tb hard disks in a RAID0 array on the Intel controller and 3 1Tb disks in a ...
2
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0answers
412 views

Reading or writing with a 4 WD5000AADS drive RAID 5 array drops to 0 speed

Edit, 10/31: Crash-- complete system lockup. Booted computer, had strange lag for visiting ANY webpage in Chrome.. Figured that either a network problem existed, or Chrome could not write to disk ...
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3answers
623 views

Several questions about software and onboard RAID 5

I have a few questions on how software and onboard RAID 5 compare: Is there any way to add a disk to an existing RAID 5 array using either software or onboard RAID? All motherboards I'm interested in ...
5
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1answer
3k views

4 x 2TB drives, safe to use RAID-5? What is failure rate?

I've read a number of opinions on the risks of running a RAID-5 using 4 x 2TB drives. Apparently the failure rate of the 2TB drives is so high that there is less redundancy than is generally expected. ...
0
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1answer
113 views

RAID Reconfiguration

I have 4 1TB hard drives that I'm about to put in RAID 5. One of the drives is defective to the point that it isn't usable. I have a spare 1TB drive, but it runs at 5900RPM as opposed to the other ...
0
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1answer
989 views

How to increase the capacity of a RAID 5 array?

Assume that I built a 2TB RAID 5 array, and it's running and some data is stored on it. Now I need to increase its size to 5TB. Can I increase capacity, particularly by adding extra drives? How? If ...
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1answer
793 views

how to find bad disk in raid array?

I have a RAID5 array and one of the disks clicks whenever I start up the array. During array operation, it seems to run fine though. This has me worried that I'm going to start running into problems ...
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2answers
3k views

Can a Raid5 array be optimized using defragmenting or other maintenance tools?

I have a Lian Li Ex-50 Raid Array setup to be 4x 2TB WD Black in a Raid5 formatted to HFS+ (journaled). The raid array is a hardware raid running through a Sil3132 chipset (SATA2 via eSata connection)...
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1answer
943 views

Intel Rapid Storage RAID 5 error, “Missing Drive”

Just recently I purchased a new motherboard for my PC due to the fact I had a motherboard with the defective 67 Intel chipset. The reason I bought the new motherboard was because I started getting ...
3
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1answer
234 views

“Breathing” sound from Linux File Server

I have a Ubuntu file server and it makes the oddest sound. I can hear a HD making a "breathing" type sound, like the disc spins up for a moment and then cycles down. It happens on a very regular ...
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2answers
156 views

Partitioning a raid array (RAID 5)

I want to partition my RAID 5 array to put a linux swap on it. Does partitioning a raid array affect performance of the overall system? Are there any disadvantages of doing it?
3
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2answers
497 views

What would you see if you tried to mount a single drive from a RAID 5 Array?

The title pretty much sums it up - if someone were to mount a single drive from a software RAID 5 array, what would they see? Would it point to being part of a RAID array, appear as encrypted data, or ...
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1answer
2k views

rebuilding raid array (rocket raid 1740)

so my rocketraid 1740 controller has 4 connectors .. i set it up with raid 5. drive on port 4 failed, but it comes back online after computer reboots. array saw this, and started to rebuild the ...
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1answer
241 views

HTPC : Ubuntu 4-Drive Raid5, Expanson

So right now I have a HTPC with (3) 1TB harddrives Software-Raid5'ed giving me something like 1.9TB of storage available for recording TV shows / media / backing up my DVD's. As I'm about 50GB off ...
5
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2answers
6k views

Bad performance with Linux software RAID5 and LUKS encryption

I have set up a Linux software RAID5 on three hard drives and want to encrypt it with cryptsetup/LUKS. My tests showed that the encryption leads to a massive performance decrease that I cannot explain....
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1answer
435 views

Possible to load old software raid array on new system? Ubuntu

I am looking into a more redundant solution to my home server. I know raid is "not" a backup, but I am looking into a raid 5 solution for these reasons. I would be very annoyed if I lost my data, ...
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2answers
1k views

Recover Linux software RAID5 array after server upgrade

I recently upgraded a server from Fedora 6 to Fedora 14. In addition to the main hard drive where the OS is installed, I have 3 1TB hard drives configured for RAID5 (via software). After the upgrade, ...
5
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3answers
2k views

RAID5 / RAIDZ - is it possible to enlarge without losing data?

If I have a RAID5 with 4x1TB drives, and then in, say, a year I decide to upgrade to 4x2TB, can I swap out one drive at a time, then let the parity rebuild, even if it's mixed-size drives? Obviously ...
31
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5answers
50k views

How does parity work on a RAID-5 array?

I'm looking to build a nice little RAID array for dedicated backups. I'd like to have about 2-4TB of space available, as I have this nasty little habit of digitizing everything. Thus, I need a lot of ...
5
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3answers
4k views

Hardware RAID - what happens if the motherboard or controller fails?

I want to set up a RAID 5 array in a machine that has an intel motherboard. It has built in raid (sata). My concern is what happens if the motherboard fails? How can I take those hard drives ...
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2answers
682 views

Windows Home Server: Can't see my RAID 5?

Motherboard: ASUS A8N SLI-Deluxe I've got a RAID 5 goin' on and there's no problem with my Windows 7 drive seeing the RAID. But, I wanted to switch out my Windows 7 HDD for a fresh Windows Home ...
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2answers
398 views

Recover from failed recovery of software RAID5 failure

I have the pleasure ;-) to have been handed the task to try to get data off a server that had a RAID5 array problem and a failed attempt to recover it. Background: the computer in question is some ...