Two Drives On My RAID 5 Failed

Apr 30, 2007

I have a dell POWER VAULT 725N utilizing a 4 HDD RAID 5 setup.

Server has died and bios error message shows that 2 hard drives had failed. I can not boot to windows.

Data is very crucial, what are my options for data recovery?

I really hope I can recover the data, I doubt that two HDD actually failed at the same time without giving any warnings. I hope its the raid controller.

Would like to hear pointers from the community on how to recover important data from the RAID.

Are there any companies/software that would help in this assuming it is a hdd failure and not a controller issue?

View 14 Replies


ADVERTISEMENT

400GB Hard Disk Drives In RAID 0, RAID 5 And RAID 10 Arrays: Performance Analysis

Mar 7, 2007

Quote:

Today we are going to conduct a detailed study of RAIDability of contemporary 400GB hard drives on a new level. We will take two "professional" drives from Seagate and Western Digital and four ordinary "desktop" drives for our investigation. The detailed performance analysis and some useful hints on building RAID arrays are in our new detailed article.

[url]

View 0 Replies View Related

Dell Drives In A RAID Array With Non-Dell Drives

Sep 14, 2009

I have a couple of Dell 1950s and in one of them, I have 2x Seagate 15K.5s that I purchased through Dell and I also have a spare sitting in my rack in case one goes bad, also from Dell.

I was going to be repurposing one of my other 1950s and was going to get two more 15K.5s for it, but wasn't planning on getting them through Dell (rip off?). This way, could still keep the same spare drive around in case a drive went bad in that system as well.

When I was talking to my Dell rep recently when purchasing another system, their hardware tech said you can't use non-Dell drives with Dell drives in the same RAID array because of the different firmware between them.

Anyone know if it is true? Anyone have any experience with using drives from Dell in conjunction with the same model drives from a third party retailer?

View 1 Replies View Related

Raid 1 Vs Two Physical Drives

Nov 1, 2009

I have number of question relevant to dedi. severs. I dont know to post them seperately or in single thread , sorry to mod for my negligence.

raid 1
or
If I have two drives ,and take daily backup on second drive

how much average small websites can hold a single machine=
quad xeon 2.3 , 4gb ram, 1 tb drive what you say?

how many websites you ever hosted on single machine?

is it wise to host large number of website on single powerful machine with external backup, or go for number of small dedis.

View 3 Replies View Related

Raid 5 Vs Raid 10 (4 Drives)

May 10, 2009

I have room for 4 more hard drives on my home server. My original goal was to go raid 10 but I've been thinking, raid 5 can support 4 drives and give more capacity. Which one would have better performance as software (md) raid? I'm thinking raid 10 might actually have bad performance as software raid, vs hardware, compared to raid 5. Would raid 5 with 4 drives be better for my case?

View 10 Replies View Related

Does Linux SW Raid Benefit From TLER On WD Drives

Dec 21, 2008

I've just bought myself a linux based NAS for storage/backups at home and a couple of WD Greenpower (Non-RAID edition) HDDs.

For those who don't know what TLER is (Time Limited Error Recovery), without it enabled the HDD does its own error recovery, which may take longer than the acceptable time for a RAID Controller. In which case, the drive is kicked out of the array. With TLER on, the idea is that the drive keeps notifying the controller, or the controller handles the error.

So, my actual question is, does Linux Software RAID benefit from TLER being enabled? Or is it best to let the drive do it's own thing?

View 0 Replies View Related

RAID Controller Failed On IBM RS/6000

Feb 15, 2007

We had one of RAID controllers failed on our IBM RS/6000 server. There are two RAID controllers on this server, one holds the OS (AIX) and the other one holds our database and this is the one that failed.

Anyway, I've always thought that once a RAID controller failed and we put in a replacement controller, it will reformat all the hard drives that were connected to the failed controller, which means we would have to restore the data from backup once the new controller is in place. However, the IBM technician we dispatched was able to build the new controller and connect all the drives to the new controller without reformatting the drives. I think he copied the RAID controller's configurations using SMIT. I think that was amazing; it saved us a lot of time.

My question is, is this something unique to IBM hardware/AIX or other hardware and OSes (Linux, Windows, etc.) have similar capability?

View 0 Replies View Related

Map Failed Software Raid Disk In Windows?

Jan 11, 2007

I took two harddrives out of a windows 2003 server and imported them as foreign disks in my pc

the problem is... when i imported them as foreign disks, windows xp decided to mark every partition on both disks as failed... even though it hasn't failed.

Problem is now, i cant map to a drive... i need to do this so i can do an NT backup from the data off the drive, then restore that data to a new drive.

Here is what disk management looks like:

http://www.digitallyhosted.com/disk_management.gif

However when i look at it in Active Partition Recovery.... without running any recovery tools... it sees the data on all the drives fine:

http://www.digitallyhosted.com/partition_recovery.gif

Is there anyway to get windows to stop being a complete pain about this and just map the drive.

View 0 Replies View Related

Do Hosts Use Enterprise Drives Or Desktop Drives

Nov 5, 2009

i want to know if there is a difference between enterprise drives and desktop drives and which ones hosts use

View 7 Replies View Related

Replacing Failed Drive In Raid-1/ Dell 2850 / FreeBSD

Dec 5, 2007

If there is a failed drive in RAID-1 running on Dell 2850, FreeBSD 5.4, can I just take out the failed drive and replace it with a new one, while the server is running? Will FreeBSD cope & rebuild the drive on the fly?

View 2 Replies View Related

Hardware RAID: Is Motherboard RAID As Good As A Dedicated PCI-E Card

Mar 24, 2008

Is Motherboard RAID as good as a dedicated PCI-E card? I am guessing a dedicated card is the best option, though costs more.

We are looking at buying a barebones server from Supermicro. It features an onboard RAID controller which supports RAID 0, 1, 5 & 10 - but for some strange reason it will only support RAID 5 if you use Windows. Here is a link to the page detailing the RAID features.

[url]

We are going to be running Linux, CentOS 5.1, so we will only have the choice of RAID 0, 1 or 10. This isn't an issue, as having RAID 10 on 4x SAS (15k) drives will be fine for speed and stability. What is an issue is would this RAID controller be as fast or reliable compared to a dedicated PCI-E card? If it can only use RAID 5 in windows, does that suggest this controller is too reliant on software? It would be a nightmare to suffer downtime and data loss because the controller couldn't hack it during a drive failure, or one day it decided to bugger up the array when rebooting.

So that leads me to looking at this card, this looks very good for what we need. Are adaptec a reliable brand? I've seen it advertised for 200, which is a good price.

[url]

This card features RAID 5 and 6, would RAID 6 be better than RAID 10 for redundancy, or is it too slow to bother with? Also it seems to have a battery module available for it, what does this achieve? Cos surely if the power dies the hard drives and motherboard can't run off this little battery, or does it just help the controller stay alive long enough with some hard drive information in its memory if the power goes out during a rebuild?

View 14 Replies View Related

Any Experiences With Software-Raid 5 Vs Hardware-Raid 5? (e.g. Hetzner EQ9)

Sep 17, 2009

I could try the Software-RAID 5 of the EQ9 Server of Hetzner.

Does anyone here has experiences, how fast a hardware raid 5 compared against the software-Raid 5 is?

The i7-975 should have enough power to compute the redundnacy on the fly, so there would be a minimal impact on performance. But I have no idea.

I want to run the server under ubuntu 8.04 LTS x64.

On it a vitualisation like VMware the IO-Load could get really high.

View 14 Replies View Related

Whats The Best For Server With SATA Raid 1 And SCSI Raid 10

Jan 14, 2008

So I've just got a server with 2xSATA raid 1 (OS, cpanel and everything in here) and 4xSCSI raid 10 (clean).

Which one do you guys think will give the best performance:

1. Move mysql only to 4xSCSI raid 10
2. Move mysql and home folder to 4xSCSI raid 10

View 0 Replies View Related

How To Setup Software RAID-10 On Linux With /boot On RAID-1

Jul 8, 2007

I am in a somewhat complicated situation... I wanted to order a custom server with hardware 3Ware RAID controller but after over a month of waiting I was told the HW RAID controller, as well as any other 3Ware controller they tried, does not work with the motherboard used in the server from Fujitsu-Siemens and that they simply got a reply from FS that the controller is not certified to work with their motherboard.

So although I'd prefer a HW raid, I am forced to either choose a different webhost or setup a software RAID. The problem is, I haven't done that before and am somewhat moderately...scared

I have read a lot of the info about SW RAID on Linux that I could find through Google but there are some questions unanswered still. So I thought that perhaps some of the more knowledgeable WHT members could help me with this problem...

The server specs will be:

Core2Duo E6600 (2.4Ghz), 2GB RAM, 6-8x* 250GB SATA II HDDs, CentOS 4.4 or SuSe, DirectAdmin

* I prefer 8 HDDs (or actually 9) over 6 but I am not sure if their server chassis can hold that many HDDs, I am awaiting answer from them. They don't have any other drives beside the 250GB ones so I am limited to those.

The preferred SW RAID setup is to have everything in RAID 10, except for the /boot partition which has to be on RAID-1 or no RAID I believe, plus one drive as hot spare (that would be the 9th drive). I am quite sure they will not do the setup for me but will give me access to KVM over IP and a Linux image preinstalled on the first HDD so that I'll have a functional system that needs to be upgraded to RAID-10.

How do I do that? The big problem I see is that LILO or GRUB can't boot from a software RAID-5/10 so I will have to mount the /boot partition elsewhere. It's probably terribly simple...if you have done it before which I have not. I have read some articles on how to setup a RAID-5/10 with mdadm (e.g. [url] ) but they usually do not talk about how to setup the boot partition. Should it be setup as a small sized (100-200MB) RAID-1 partition spread over all of the drives in the otherwise RAID-10 array?

What about swap? Should I create a 4-8GB (I plan to upgrade the server RAM to 4GB in near future) RAID-1 swap partition on each of the disks or swap to a file on the main RAID-10 partitions. The second sounds simpler but what about performance? Is swapping to a file on RAID-10 array a bad idea, performance wise?

Is it possible to grow a RAID-10 array in a way similar to growing a RAID-5 array with mdadm (using two extra drives instead of one of course)? mdadm doesn't actually even mention RAID-10 despite it does support it without having to create RAID-0 on top of RAID-1 pairs if the support is in kernel, from what I know.

View 8 Replies View Related

Worth Having RAID 1 If Raid Arrays Break

Feb 25, 2009

How often do RAID arrays break? Is it worth having RAID if a servers hard drive goes down? I was thinking it may just be a better option to just have a backup drive mounted to my system and in the even of a system failure just pop in a new hard drive, reload the OS, and then reload all my backups?

View 14 Replies View Related

Software Raid 1 - Rather Slow During Raid 1 Recovery

May 20, 2009

I have a new server and it is rather slow during raid 1 recovery after system installed

CPU: Intel Core2Duo E5200 Dual Core, 2.5Ghz, 2MB Cache, 800Mhz FSB
Memory: 4GB DDR RAM
Hard Disk 1: 500GB SATA-2 16MB Cache
Hard Disk 2: 500GB SATA-2 16MB Cache

root@server [~]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[1] sda1[0]
256896 blocks [2/2] [UU]

md1 : active raid1 sdb2[1] sda2[0]
2096384 blocks [2/2] [UU]

md2 : active raid1 sdb4[2] sda4[0]
480608448 blocks [2/1] [U_]
[=======>.............] recovery = 36.7% (176477376/480608448) finish=1437.6min speed=3445K/sec

the sync speed is just 3.4Mb/second and the total hours needs to be more than 40 hours

Also the server load is very high (nobody uses it)

root@server [~]# top
top - 07:00:14 up 16:55, 1 user, load average: 1.88, 1.41, 1.34
Tasks: 120 total, 1 running, 119 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.2%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.2%si, 0.0%st
Mem: 4148632k total, 747768k used, 3400864k free, 17508k buffers
Swap: 5421928k total, 0k used, 5421928k free, 569252k cached

View 8 Replies View Related

RAID 5 Vs RAID 10 In Shared Hosting Server

Oct 22, 2009

I am in the process of restructuring the infrastructure on our servers. I am thinking of using either RAID 5 (1 hot spare) vs RAID 10 as my 1U server has 4 HDD tray.

RAID 5 would have better capacity but RAID 10 has better overall performance. Which one do you guys go for a shared hosting server?

View 14 Replies View Related

Turn Non Raid Into Raid On Live Server

Dec 23, 2008

Is it possible to turn a non raided setup into Linux software raid, while it is live, and if it's the OS drive? Can you even software raid the OS drive remotely? I've been thinking about doing it for the redundancy (and possible slight performance boost for reads, but doing it more for redundancy). I'm using CentOS.

View 12 Replies View Related

Read Raid-disk On Non-raid System

May 22, 2008

I want to take some data from a raid-disk (taken from a raid-1 sstem). Put it into a new system already, but this system doesn't have any raid.

When viewing "fdisk -l", it said /dev/sdb doesn't contain valid partition. Is there anyway I can mount it now? I am on CentOS 4 box

View 2 Replies View Related

3ware RAID Or Software RAID

Mar 24, 2009

MY server configure our drives with RAID-1.

How can I check it my server configure with 3ware or software raid ?

Also please advise me how can I monitor raid configuration that my raid is working fine or no ?

View 8 Replies View Related

RAID Or Not To RAID: Trying To Decide On A New Server

Jul 11, 2008

I've been talking to the Planet about trading in my four and a half year old "SuperCeleron" (from the old ServerMatrix days) Celeron 2.4 GHz system for something new. As part of their current promotions, I've configured a system that looks decent:

Xeon 3040, 1 gig of RAM, 2x250GB hard disks, RHEL 5, cPanel+Fantastico, and 10 ips for $162.

Not too bad. I could bump up the ram to 2 gb for, I think, $12 more, which I'm thinking about and wouldn't mind some thoughts on. But, the thing that has me really confused is RAID. I like the idea of doing a RAID 1 setup with those two hard disks. But, the Planet wants $40/month for a RAID controller to do it. I really don't want to go over $200 a month!

Any thoughts on alternative redundancy strategies that might avoid that cost? Software RAID does not seem to be offered by the Planet, unless I can figure out how to do it after installation (is that possible?) Better ideas in general on the server?

View 14 Replies View Related

Raid 1 SCSI Or Raid 10 SATA 10k

May 23, 2007

Just curious what your thoughts are on performance:

2 SCSI Drives 10k w/RAID 1

or

4 SATA 10k w/RAID 10

Prices are not too different with 4 drives just being a tad more.

View 5 Replies View Related

Software Raid Vs. Hardware Raid

Jun 5, 2007

how well software raid can perform and how it compares to hardware raid. How does software raid actually work and is it worth it?

How should I look at be setting up software raid if I was going to? Would you recommend just to use hardware raid instead?

View 2 Replies View Related

RAID 10 Or RAID 5 With Online Backup

Dec 10, 2007

Which do you guys recommend of the following?

4x 73GB 15,000rpm SAS drives in a RAID 10

or

4x 73GB 15,000rpm SAS drives in a RAID 5 w/ online backup

View 9 Replies View Related

SSD Drives

Oct 5, 2009

Has anyone begun implementing SSD drives? We're thinking about using them as OS drives.

View 14 Replies View Related

Using 2TB Drives

Sep 30, 2009

I'm not sure they make sense yet, especially in bigger raid arrays...

View 14 Replies View Related

1.5TB Drives

Nov 4, 2009

I know there are a lot of experienced hardware guys on here, so I wanted some input on 1.5TB drives. Are they reliable enough to be used in non-mission critical storage servers? 99% of what we do is OEM (Dell) equipment, so I don't test raw hardware much these days.

I've read a lot of negative things about Seagate lately. Can anyone chime in with specific models they've had positive or negative experiences with from any vendor? Reading some reviews on the WD 1.5TB Caviar Black drives, there seems to be some weird issues with them going into a recovery cycle.

View 14 Replies View Related

Kernel Drives

Aug 4, 2009

What is the best way to find out which filesystems and harddrive drivers you can remove? Obviously, i need ext2,3 but how do you find which HD you only need?

View 1 Replies View Related

WDC Drives, Caviars Vs Re

Oct 1, 2009

I was just wondering whats the real live experience or difference on using Western Digital Caviar series (green, blue or black) on a DC environment vs the RE which are suppose to be for enterprise business.

On the WDC website the caviar series are targeted under desktop disks not servers. But allot of servers and providers use them. If you have servers your suppose to use the RE series, I exclude raptors as I only want to compare medium performance disks here.

View 1 Replies View Related

Hard Drives For VPS

Apr 23, 2009

I'm building a couple of VPS host servers for a client.

Each server have to host 20 VPS and each server will be 4 cores with 32GB of ram. So CPU and ram should be just fine, my interrogatioon now is hard drives. The company owns the machines, but not the drives yet.

I searched a lot on your forums but found nothing relating on VPS. I'm basicly a DBA IRL, so I have experience in hardrives when it comes to databases, but it's completely different for VPS.

According to my boss, each VPS will run a LAMP solution (having a separeted DB cluster is out of question for some reason).

First, raid1 is indeed a must. There is room for 2x 3.5 drives. I might be able to change the backplane for 4x2.5, but i'm not sure...

I've came to several solutions:
2x SATA 7.2k => comes to about 140$
2x SATA 10k (velociraptor) => comes to about 500$
2x SAS 10k with PCIe controller => comes to about 850$
2x SAS 15k with PCIe controller=> comes to about 1000$

They need at least 300GB storage.

But my problem is that the servers do not have SAS onboard so I need a controller and in my case the cheapest solution is best.

But I'm not sure that SATA 7.2k will hold the charge of 20 complete VPS.

Does it worth it to go with SAS anyway or SATA should be just fine? With SATA better use plain old sata 7.2k or 10k drives?

That's a lot of text for not much: What is best for VPS: SATA 7.2k, SATA 10k or SAS 10k?

View 14 Replies View Related

What To Do With 6 Hard Drives

Mar 25, 2007

I am about to buy a Compaq server with 6 SCSI hard drives. In you opinion, what is the best RAID configuration with 6 HDs?

View 14 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved