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Old 06-12-2009, 04:11 AM   #1
mirko.g
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Registered: Jun 2009
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Adding a 4.5 Tb RAID array...


I absolutely don't want to multipost, but maybe this is not a newbie question as I thought at first...

PROLOGUE
I have a computer with a Promise Fasttrack TX4650 SATA RAID controller and 4x1.5 Tb drives and no floppy drive. I defined a new RAID5 array (4.5 Tb). I tried to install several Linux distros but I was not able to have the RAID controller to be recognized so I added a 320 Gb drive out of the array. I installed CentOS 5.3, built the right module from sources (t3sas) and finally have the device working (/dev/sdb).

QUESTION
My goal is to install Gallery to store a big DB of RAW photos (about 1 Tb but it will double in a couple of year), so I thought to mount /var/www on this new array but I want to get best performances and lowest risks.
I used parted to define a new ext2 partition (/dev/sdb1) then I ran mke2fs -j /dev/sdb1 to convert to ext3.
I mounted a new /var/www folder on /dev/sdb1 and moved into the content of the old /var/www. Then I added this line to /etc/fstab:

Code:
/dev/sdb1 /var/www ext3 defaults 0 1
but everything I do the system informs me that this is a read-only filesystem...
So what?
The main drive uses a LVM... should I use for the RAID array too?
I wonder if this configuration allows to me to define user quota adding userquota and groupquota to /etc/fstab...

Thank you!
 
Old 06-13-2009, 04:22 PM   #2
hasienda
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Registered: May 2009
Location: Saxony, Germany
Distribution: Debian/GNU Linux
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Some hints

Quote:
Originally Posted by mirko.g View Post
[...] I mounted a new /var/www folder on /dev/sdb1 and moved into the content of the old /var/www. Then I added this line to /etc/fstab:

Code:
/dev/sdb1 /var/www ext3 defaults 0 1
but everything I do the system informs me that this is a read-only filesystem...
So what?
Not much to work with until now. You'll need to post the exact error message(s) here to get help, not only wild guesses.

Quote:
Originally Posted by mirko.g View Post
The main drive uses a LVM... should I use for the RAID array too?
You don't need to. But planning data storage for years is highly speculative and LVM will give you more flexibility in case your needs will change in an unforeseen way without the need to repartition you RAID space. So I'd recommend it. However, LVM is not really meant for beginners.
Quote:
Originally Posted by mirko.g View Post
I wonder if this configuration allows to me to define user quota adding userquota and groupquota to /etc/fstab...
As ext3 has quota support, Yes. The underlying parts, LVM, RAID, what else doesn't matter neither to the file system nor to quota.
 
  


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