[Bassetlug mailing] Setting up RAID

[philip jones]

hi lug
I have managed to install apache and php
but apache dosn't work unless i disable SElinux in fedora 10. It works fine 
on my home network and have browsed a web page and phpinfo. I have 
configured the fire wall to open port 80 and port 22 ssh. But port 21ftp 
doesn't work so I have to use sftp port 22. my next task is to install 
mysql.
how do i access my server from the www do i have to set up a DNS server to 
deal with my routers ip address and ip address of my computer on my lan. 
also my router has a fire wall which blocks inward access from the web do i 
need a different router for my server.
kind regards
philip
----- Original Message ----- 
From: "Danny Roberts" <droberts23 at csc.com>
To: "LUG Mailing list for Bassetlaw and N. Notts" 
<bassetlug at mailman.lug.org.uk>
Sent: Monday, March 23, 2009 8:19 AM
Subject: Re: [Bassetlug mailing] Setting up RAID


> Philip I believe you can simply type in the following to your web browser
> to check if Apache is installed or not:
>
> http://127.0.0.1/
>
> If successful you should get a page telling you Apache has been installed!
>
> Kind Regards
>
> DANNY ROBERTS
> EMEA Cross Platform Services - Evergreen
> CSC
>
> GOS   I    p : +(44) 1246 523181    I    droberts23 at csc.com    I
> www.csc.com
>
> CSC, Block A, Manor Offices, Old Road, Chesterfield, S40 3QT.
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>
>
> "philip jones" <phil at thejones-family.co.uk>
> Sent by: bassetlug-bounces at mailman.lug.org.uk
> 20/03/2009 21:58
> Please respond to
> "LUG Mailing list for Bassetlaw and N. Notts"
> <bassetlug at mailman.lug.org.uk>
>
>
> To
> "LUG Mailing list for Bassetlaw and N. Notts"
> <bassetlug at mailman.lug.org.uk>
> cc
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> Subject
> Re: [Bassetlug mailing] Setting up RAID
>
>
>
>
>
>
> To Martin
> I have currently install fedora 10 which has the option to set up raid1+0
> (10) .once installed it was time to find out whether the drives were
> working
> as a raid array or separate so using our test
> mdadm  /dev/sda
> we get "sda is not an md array"
> this where we went wrong
> we should type
> mdadm /dev/md0
> we get "148.84gib raid10  4 devices 0 spares use mdadm --detail for more
> information.
> the raid10 is now running
> Now I have to set it up as a web server i wounder if apache has been
> installed ?
> kind regards philip
>
> ----- Original Message ----- 
> From: "Danny Roberts" <droberts23 at csc.com>
> To: "LUG Mailing list for Bassetlaw and N. Notts"
> <bassetlug at mailman.lug.org.uk>
> Sent: Thursday, March 19, 2009 3:55 PM
> Subject: Re: [Bassetlug mailing] Setting up RAID
>
>
>> We initially tried using the software RAID (via the Ubuntu
>> Installer/Partitioner) but it seemed incapable of creating the RAID 10
>> setup we wanted so Philip switched it over to hardware RAID.
>>
>> RAID 5 is great (we use a lot of it at work albeit on that "other OS")
> but
>> that would lack the improved performance Philip wanted from the RAID 10
>> configuration.
>>
>> I think playing around with RAID and finishing off Philip's web server
>> could be great for the next LUG meeting, I know I'm certainly interested
>> in learning more. And of course if no one else wants the Compaq servers
>> etc I'd love to give them a new home ;-)
>>
>> Mark do you have any experience in setting up complex/esoteric RAID
> setups
>> like RAID 50, RAID 60 or even RAID 100? That would probably be beyond
> the
>> scope of one of our meetings but I've done a lot of reading up on RAID
>> today and its whetted my appetite.
>>
>> Kind Regards
>>
>> DANNY ROBERTS
>> EMEA Cross Platform Services - Evergreen
>> CSC
>>
>> GOS   I    p : +(44) 1246 523181    I    droberts23 at csc.com    I
>> www.csc.com
>>
>> CSC, Block A, Manor Offices, Old Road, Chesterfield, S40 3QT.
>>
>> CSC • This is a PRIVATE message. If you are not the intended recipient,
>> please delete without copying and kindly advise us by e-mail of the
>> mistake in delivery.  NOTE: Regardless of content, this e-mail shall not
>> operate to bind CSC to any order or other contract unless pursuant to
>> explicit written agreement or government initiative expressly permitting
>> the use of e-mail for such purpose • CSC Computer Sciences Limited •
>> Registered Office: Royal Pavilion, Wellesley Road, Aldershot, Hampshire,
>> GU11 1PZ, UK • Registered in England No: 0963578
>>
>>
>>
>>
>> Rev Mark Pengelly <minister at thecrossing.co.uk>
>> Sent by: bassetlug-bounces at mailman.lug.org.uk
>> 19/03/2009 15:44
>> Please respond to
>> "LUG Mailing list for Bassetlaw and N. Notts"
>> <bassetlug at mailman.lug.org.uk>
>>
>>
>> To
>> "LUG Mailing list for Bassetlaw and N. Notts"
>> <bassetlug at mailman.lug.org.uk>
>> cc
>>
>> Subject
>> Re: [Bassetlug mailing] Setting up RAID
>>
>>
>>
>>
>>
>>
>> Was Philip's discussion all relating to mdadm? We use that on the
>> crossings' server. it is of course 'software raid' not to be confused
>> with a hardware raid controller.
>>
>> Occasionally we have had glitches with our raid 1 setup, ie a disk drops
>> out of the raid and then md commands are used to add it back in. So far
>> it has always done so, although sometimes we have had to do a cold
>> reboot of the machine.
>>
>> Hardware raid is preferable if available. Most compaq servers raid
>> hardware is supported in linux and can usually see a partition as a boot
>> device when installing, once the array is setup using the proprietary
>> software (SmartStart in the case of compaq).
>>
>> I have a pci hardware raid card on my main ubuntu machine, but never
>> really got it working properly.
>>
>> Many modern motherboards with sata raid are actually only using
>> (windows) software to create the raid, it's not full proper hardware
>> raid (I think).
>>
>> if anyone wants to play with raid I have 2 x compaq 1500 servers, one
>> with 5 drives, one with 3 drives in it. I had redhat 6 running merrily
>> on it about 5 years ago, I also have a scsi attached array case with
>> another 7 drives in (only 2.1gb per drive). I've been meaning to clear
>> this out for months, free to a good home! only catch - you need to have
>> ear defenders on when all the drives start up! i ran mine in the
>> garage!! Perhaps I'll bring it to bassetLUG show how to set it up and
>> then someone else could take it home!?
>>
>> Sounds good Philip, sorry I missed it! Raid is definately cool, what
>> about raid 5?! my favourite!
>>
>> Mark
>>
>>
>>
>> On Thu, 2009-03-19 at 13:55 +0000, MJ.Wells wrote:
>>
>>> Good to see 'old' and 'new' members at the meeting last evening where
>> Philip
>>> gave us a very informative demonstration of setting up RAID in Ubuntu.
>>>
>>> Philip told us that he had occasionally seen problems when he set up
>> some
>>> systems which he felt were due to not having identical drives in the
>> array
>>> as is recommended.
>>>
>>> Philip then showed us that  setting up the RAID in the BIOS causes
> Linux
>> to
>>> be unable to find the boot loader so that the most expensive of
>> equipment
>>> just loops at boot as it could save me much time in the future. It
> seems
>>> that the boot partition has to be excluded from RAID.
>>>
>>> Philip went on to explain the difference between RAID 0 (striped) and
>> RAID 1
>>> (mirrored) along with the more complex RAID 10 (1+0) which combines
>> both.
>>> After a detailed setup of the partitions using the hardware RAID which
>> led
>>> to the failure to boot, Philip showed us the process of setting up the
>>> drives in the Ubuntu Server install. Finally we looked at leaving the
>> setup
>>> of the RAID until Ubuntu had been fully loaded on some of the disks.
>>>
>>> Unfortunately, even though we extended our evening until well past 10pm
>> as
>>> we were enjoying the demonstration so much, we had to leave the full
> use
>> of
>>> mdadm until another time.
>>>
>>> I have not encountered this technology before and have learned a lot.
>> Thanks
>>> Philip for a very informative and useful demonstration. Now ... I
> wonder
>>> where can I lay my hands on four unwanted 500Gb-ish drives so that I
> can
>> try
>>> it all for myself?
>>>
>>> Martin
>>>
>>>
>>>
>>>
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>>> Bassetlug at mailman.lug.org.uk
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