Milan Andric wrote:
Hello,
I'm planning on sqeezing as much as I can into a microATX case
to make my mythtv frontend/backend. I also want to make this
a media storage box/file server, ie. include a RAID 5 LVM storage setup.
It'll be noisy and, more worryingly - very hot!
I'm basically stuck on the RAID. Since I do not have enough datanope - can't do that :)
*right now* to use the 3 x 300G RAID 5, I'd like to just buy two
drives now and use mdadmin to
setup a RAID 5 with 2 missing drives and add drives as time goes on.
You can start with a 3-drive raid5 with 1 missing (ie 2x300Gb) and add a 3rd later.
But you'll have no redundancy until you buy the 3rd drive.
You also can't 'add drives as time goes by' to a raid 5.
You could buy another 3 drives and setup another 3drive raid5 and add it to your lvm but that's not what you meant.
[you could also investigate EVMS - it does allow you to 'grow' raid5 - but it can fail and backups are strongly suggested...]
I know it's required to have 3 drives to make a RAID 5 array. But is
there a way to fake so I can add a third drive later? Or do I just
have to fork up the cash now?
so yes you can use the 'missing' keyword to fake the 3rd drive.
If you could post your partition scheme or how you setup your partitions/drives it would help me.
see the wiki - I wrote a step-by-step there... http://www.mythtv.info/moin.cgi/AdministrationSoftware_2fLvmRaid
Has anyone tried to mix/match devices like ATA and SATA to create a raid 5 withyes.
md? I know it's crazy but i'm just trying to consider the options for
the time being.
I have 6x250 Gb sata drives making a raid5 array
The 6th 'spare' drive is a 250Gb partition on a 300Gb PATA drive - and I have had it as part of the array with no issues at all.
Here's some of my proposed hardware setup (still in the works) :
mostly fine
Case:This'll hurt - search the lkml for issues that eventually trace to poor PSU or overheat with multiple drives...
Cooler Master ATC-620C-BX1 Cases microATX Form
http://www.newegg.com/app/viewProductDesc.asp?description=11-119-024&depa=0
HTH David
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