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?
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Oct 24, 2009
I am looking to hook up 4 WD Velociraptors to a Raid array. My #1 priority is speed, thus I will be doing RAID 0.
I'd prefer something from Canada.
I just thought of it, 4 drives on RAID 0 might not be a good idea ... Should I opt for RAID 5?
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Jul 5, 2008
If we go for a RAID controller either RAID 1 or RAID 5, then which is the best option, hardware raid controller or software raid controller?
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Jul 20, 2008
I'm used to 3dm controller, that I can access using HTTP, configure to send E-mail if one HDD shows error, and so on
now I'm using a FreeBSD server with RocketRAID RAID controller
anyone knows if it's possible to do the same as 3dm?
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Jun 28, 2009
I'm seeing the following from dmesg:
Quote:
3w-9xxx: scsi0: AEN: INFO (0x04:0x0053): Battery capacity test is overdue:.
When I'm in the CLI console (tw_cli) and tries to test the battery, I'm seeing the following:
Quote:
//vpsXX1> /c0/bbu test
Depending on the Storsave setting, performing the battery capacity test may
disable the write cache on the controller /c0 for up to 24 hours.
Do you want to continue ? Y|N [N]:
This is a live production server with client VPSs on it. Anyone here actually did 3ware battery test before on production system? Is it ok to do this? I'm seeking someone actually performed test operation before, not from someone just assumes it will be ok.
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Jun 6, 2009
I have a 3ware 9650SE-24M8 RAID Controller. It was working fine for a few days and today while I was changing the RAID configs and installing different OSs, it just stopped working. Now when I boot my machine up it does not even detect any hard drives or RAID controller. I looked inside the box and the LED light on the RAID controller that is usually solid green is now blinking red. I googled for solutions but all searches lead me to useless information such as blinking red lights on the server case.
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Mar 26, 2007
This problem has happened to me twice on the very same server. I can't seem to figure out what's wrong with it.
My raid controller is Areca 1160 + 1GB Ram + 16xWD4000YS. Initially I had the problem of the disk dropping from the array randomly. I suppose this problem has been fixed since I have upgraded disks firmware according to WDC suggestion.
But there's another problem now. From my observation, the controller is randomly dropped off the system. When this happen, I cannot read/write anything from the disk at all. I can SSH in and able to run Areca CLI tool to see what's going on but only to get the message saying that it cannot find any Areca controller.
My only option is to restart the server and fsck all those 16 disks (not fun). I checked the log on the RAID controller itself, there was no sign of problem at all. No alert, no disk being dropped off the array, no events logged at all.
I'm using CentOS 4.3. Firmware on the RAID controller is 1.41, latest is 1.42. (Stupid me for not upgrading firmware when server crashed.) I plan to take the server down for RAID firmware upgrade soon. I just hoped that it's just problem with the firmware, not the controller or backplane itself.
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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?
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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.
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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?
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May 12, 2009
I am currently on a shared hosting paying a typical $7/month. The traffic of my website is increasing at a rapid rate and sometime twice or thrice in a month, I get those cpu exceeded errors. I'm running just 4-5 plugins on my website, nothing much and the sponsors ads are hosted on 3rd party sites to reduce the server load.
About my website:
It is a gadget site running on wordpress software with mysql db now exceeding 22MB. My monthly bandwidth goes near 80GB. Currently I get 6000-7000 visitors in a day and I've some future plans which will make it to 10000+ in coming months.
What do you guys say? To go in for VPS or still remain with shared hosting?
If you say that I must go for VPS, then which is the cheapest and most reliable VPS. My budget for my website is upto $20/month
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May 2, 2007
Is it possible for a vps to queue 6000 outgoing emails and send them in just one hour, and deal with the load/io the returning emai l processing is going to generate (bounced, refused, inbox-full emails need to be removed from the list).
this is a daily joke service and it needs to send 6000 emails at a certain hour every day, and process returning emails for anti spam compliance and health of the list.
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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]
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Oct 31, 2009
we need controller to use with 8 hdd's up to 1,5TB & raid10. Most of adaptec, 3ware only up to 1TB tested..
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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?
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Jun 22, 2008
I've only tried whmsonic shoutcast admin pro to create sc accounts
I used whm to create cpanel hosting accounts before so had an idea.
With whmsonic admin pro i was a bit lost, creating cpanel hosting
accounts so i could ad those features to shoutcst accounts
But from what i've read, cast control is more straight to the point
You don't need to be creatings cpanel accounts first etc etc.
Is there others that any of you have on your servers for setting
up shoutcast accounts with hosting for uploading audio files ect
Autodj and so on.
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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.
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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
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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.
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Mar 28, 2009
one of my servers has 2x250gb hard drives in hardware RAID 0 using a 3ware controller, but ive now got the following error message 3 times prior to 3 server crashes, my server supplier beleves it one of the drives failing (i have backups on a non raid drive so rthats fine) but i suspect the controller, whats everyone else think...
Code:
Mar 28 22:41:46 server kernel: sd 2:0:0:0: WARNING: Command (0x2a)
timed out, resetting card.
Mar 28 22:42:39 server kernel: 3w-xxxx: scsi2: Command failed: status
= 0xc7, flags = 0x1b, unit #0.
Mar 28 22:43:08 server kernel: 3w-xxxx: scsi2: Command failed: status
= 0xc7, flags = 0x1b, unit #0.
Mar 28 22:43:12 server kernel: 3w-xxxx: scsi2: AEN: WARNING: ATA port
timeout: Port #1.
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May 29, 2007
Anyone use Hosting Controller 7.0 software?
I am having a problem with HC7 about import from a website that is existing(include DNS and Mail ) in Server into HC7 to manage.
But when i have imported it then it only can import website. Mail Domain and DNS of those website cannot import.
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May 17, 2007
I installed a HC7 software that is manage host to provide my company 's customer. I have a problem with Mail Server is MDaemon, it cannot connect HC7 while Database Server, DNS server and Webserver are connected.
All things r ok except of MDamon. Exactly, I cannot create/add mail domain in HC7 for the website is created. However, when i opened MDaemon interface to check then i recognize mail domain with same name as webise that i have created in HC7. i return HC7, add mail domain for that website again. Result, it occur errror : Unable to create user.
MDaemon of tray icon is blue , is it right configure?
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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?
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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
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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?
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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.
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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
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Jul 28, 2008
I am looking for a cheap sata controller that can do JBOD with a PCI Express interface(preferably low profile, 2U server) and proper driver support for linux and solaris. The cheapeast one I found is from supermicro but I don't think they can be used in non-supermicro servers. Any suggestions?
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Oct 24, 2008
We have a domain portal controller for windows. All the machines in the n/w are connected to it. So, when ever an user enters the user name and password it gets authenticated from the domain portal controller. So, my login can be accessed anywhere in the netowrk.
Example : my login is sabarishks which can be used in any machine under this domain controller.
But, if the system is installed with both linux and windows only windows username will be authenticated using the domain controller. Whereas, the linux users will work with in the system using /etc/shadow file. Hope, I am clear so far.
The requirement is same as above. The authentication mechanism for linux should work as windows. When ever an user is entered with a username and passwd, it should get authenticated from domain controller.
I mean, the user created in a windows machine should be used for linux login also. More importantly, It should work in all systems.
Which technology can be used to do this? Samba,Ldap, NFs or what?
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Sep 18, 2008
if anyone knows of any shared hosting company that supports the out-of-the-box Model-View-Controller (MVC) asp.net template and which version (the latest at the moment is Preview 5).
Moreover, does it support .net 3.5 with sp1, IIS7, SQL 2005 and ajax control tookit?
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