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What RAID Level 1 or 5?

post #1 of 9
Thread Starter 
I am looking at a dirt cheap, 1U server, 3 HDD bays. I was thinking of having RAID 1 with a hot-spare or 3 disc RAID 5. I will be using 3 2TB HDD's, I know with RAID 1 it will only be 2TB, RAID 5 would be 4TB.

Is there a performance hit with a 3 HDD RAID 5?

The server has (according to the owner) 8x PCI-e slot, I am looking at the Dell PERC 5i card.

It's will be a storage/backup/video-audio streaming server. The OS will be on a 2.5 SSD/HDD. (regretfully no RAID will be available for it.)


Thanks for any and all help.
post #2 of 9
If you haven't bought it yet and are still looking, have you considered the PERC 6i? It does raid 6 which would be my choice over 5.

If you can't find a 6 for a good price then between 1 and 5 i think i'd chose 1 for a file sever. How many concurrent users will there be?
post #3 of 9
I wouldn't bother with RAID5 for 3 disks. But I wouldn't go with a hotspare in RAID1 either for home use - I'd use the extra drive slot as a RAID1 drive with your OS drive, and use the 3rd drive as backup, stored offline out of the server.

But TBH I wouldn't use a 1U server for this anyway - it'll be horribly loud, with no expansion prospects. Why use that form factor?
post #4 of 9
I'd go with RAID 5, that way you have more storage and if one drive dies you still won't lose any data but rest assure you better replace that dead drive ASAP after one has failed.

Also, if I remember correctly RAID 5 has better performance over RAID1 as well.

I use my sig rig as a media server as well and I have mine setup in RAID 5 and it performs great and I won't be losing any data any time soon.
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post #5 of 9
Thread Starter 
^Thanks, RAID 5 it is.


Quote:
Originally Posted by Boyboyd View Post
If you haven't bought it yet and are still looking, have you considered the PERC 6i? It does raid 6 which would be my choice over 5.

If you can't find a 6 for a good price then between 1 and 5 i think i'd chose 1 for a file sever. How many concurrent users will there be?
Maybe 5 tops, most likely not all at once. RAID 6 would be my preference, just it needs 4 HDD not three that I will be confined to with this server. However if I find one very cheap then I will get it. (on a very limited budget right now.)


I have a Gigabit backbone, and all computers have Gigabit capability.(even the server.)

Quote:
Originally Posted by the_beast View Post
But TBH I wouldn't use a 1U server for this anyway - it'll be horribly loud, with no expansion prospects. Why use that form factor?
Deaf, don't care, because for now it will work and the price is right.($30 for the server.)


Thank you for all your help.
post #6 of 9
This is 2U but a heck of a beast for the price:

http://www.surpluscomputers.com/3506...l380-xeon.html

HDDs might be a bit pricey for this rig, but stable as heck.

We use these as file servers at my place of work...(cost us over 7G at the time when it was new LOL)
    
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post #7 of 9
raid 5.... what drives are u using? Consumer drives or enterprise drives? The regular consumer drives don't seem to hold up as well in servers but if the price is right then go for it. When you say 2tb are these the green drives (5900 rpm or 5400 rpm)? If so, they will be quite slow compared to a 7200rpm or 10k rpm drive.

@itcrashed he could only get 300gb drives in there and have a max of 1.8tb which is less than 1 drive he has now.

Of course, even if they are slow, it is not a big deal for a file server. I have a celeron e3300 or something, with 2gb of ram and 2 gigabit nics (teamed) with Ubuntu server (cli only) and it does great. No issues at all with speed and my drives are 1.5tb green drives.... I don't use raid. I just run rsync to copy the first drive to the second, works well.
Edited by MrAMD_Fan - 3/10/11 at 10:59am
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post #8 of 9
Thread Starter 
These are the drives I have, Seagate Barracuda XT ST32000641AS 2TB 7200.

Anything below 7200 (SSD don't count. ) is not a HDD, if it's 'Green' drive then it's my door stop.

The server may or may not be over kill, Two Xeon 3.2GHz (With HT I think, the guy seam to think there dual-cores.) 4GB of RAM, Two 120GB 10K HDD.
post #9 of 9
Quote:
Originally Posted by bleach View Post
These are the drives I have, Seagate Barracuda XT ST32000641AS 2TB 7200.

Anything below 7200 (SSD don't count. ) is not a HDD, if it's 'Green' drive then it's my door stop.

The server may or may not be over kill, Two Xeon 3.2GHz (With HT I think, the guy seam to think there dual-cores.) 4GB of RAM, Two 120GB 10K HDD.
Oh it is overkill for a fileserver, but that is ok. The green drives work fine for me, i my little home environment. Sounds like u have the hard drive situation covered.... you should be fine.... maybe add a 2nd nic if you don't have 2 built in (alot of the servers have dual nics).
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