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Server Hard drives...SCSI 3 or SATA 2

post #1 of 16
Thread Starter 
I am setting up my first server to do some hosting and I expect a fair amount of trafic on it. I am wondering about what hard drives to use.

I already have some older SCSI 3 drives...which is supposed to have a 160MB/sec data transfer, but would some SATA2 hard drives work just as well or even better? I am aware that the 300MB/sec sata2 speed is a BURST speed and I am wondering if the SCSI will have a higher average speed and stay closer to the 160 mark.

The way I figure it, it will cost me the same both ways. I need to buy a good controler card for the SCSI (I have the cable and terminator) and that would cost the same as a couple of 80 gig SATA2 drives. However I would rather not try both and see which works the best. I figure there has to be a reason why SCSI is so expensive and a pain to setup. At the same time, I realize the SCSI tech I am refering to is about four or five years old and SATA2 is relatively recent tech.


So, the question stands at:

SCSI-3 @160MB/sec (10k RPM) vrs SATA2 @300MB/sec (7.2K RPM)

Which is better? (I hate that question)


I also should add in here that the SCSI drives are around four years old, but only saw use for about six months. They have been stored well so I am sure they are near new condition, but to be safe I have just tested them all on a old piece of junk SCSI controller that I got off ebay for a few bucks. They all seem to work, but I am sure the controler is serverly limiting them (44 MB/sec LOL). On the other hand, the SATA2 drives would be new.
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post #2 of 16
For a server of "this is for my job" class work - I would go SCSI.

Not sure what cards, drives you are specifically talking about (that would help) ..

A 10k SATA raptor drive can spank 15k SCSI drives - but has a lot more overhead. So, if you are doing clean benchmarks.. ok, that is nice. Now do it where the CPU is under other load.. SCSI would win.

So, if throughput is the only concern (like, maybe just a file server) then SATA2.. But if overall system performance is wanted.. SCSI.

And in real world, you are hard pressed to beat 150MB/s due to NTFS contraints (unless you are going *ux, ext2, etc.)

Of course, nothing can beat a clustered dl585 w/SCSI backplanes .. but I guess that would be overkill for ya
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post #3 of 16
Thread Starter 
Sorry, I hadn't thought about putting down what the use would be...
and I am aware that most times on a desktop the full potential of an IDE 133 isn't reached, but blame the overclocker in me...I want the best.

The "main" purpose will be a file server and message boards, with alot of people posting pictures and a few movie files every now and then...so there will be some large files roaming about the server.

I also was hoping to run a dedicated server for BF2 or Quake4...mabye both if I got the bandwith and Hard drive space.

The SCSI drives in question are:
Seagate 18.4GB U160 68PIN 10K RPM Cheetah 36ES....i have six of them. I was thinking of three RAID 1 setups...maybe a RAID0+1 *shrug* figure that out later if I use them

and I just found an old review of them online were the person got a sustained 68MB/sec DT average.

The SATA2 drives would be what ever newegg was selling on sale at the time...but would be a pair 80 gig drives that were around a $100 a piece.

...and reguardless, I am going to have a 40 gig SATA drive seperate that will hold the OS
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post #4 of 16
With the overhead of running a game and the large number of random reads that will require...

I would give those SCSI drives are run. Sure, not top end current.. But my guess would be a lot less cussing down the road (stability.)

You are not going to have enough sustained reads to make anthing interesting. Your RAM and network cards will play as much into it as your disks.
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post #5 of 16
Thread Starter 
Quote:
Originally Posted by satansmurf
With the overhead of running a game and the large number of random reads that will require...

I would give those SCSI drives are run. Sure, not top end current.. But my guess would be a lot less cussing down the road (stability.)

You are not going to have enough sustained reads to make anthing interesting. Your RAM and network cards will play as much into it as your disks.

yep I am trying to skimp on the hard drive parts. I plan to be running two gigs of registered RAM and a gig LAN card.

I am glad you recomended the SCSIs...I've never used more than one in a machine before. This will be a learning experience. I am fairly sure I would have setup a system with them sooner or later.


Any more input is welcome though...I won't be ordering the final parts till next weekend.
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post #6 of 16
http://www.pugetsystems.com/articles.php?id=19

BTW: Sata2 will never reach 300Mbs a Sec, Sata150 dosent even reach 150Mb's a sec and if you already have the SCSI stuff, you are all set.

http://www.tomshardware.com/newslett.../17/wd360.html
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post #7 of 16
As to disk setup, I am assuming you have backups..

Get two IDE drives - one of them a small fast one for pagefile (you will want it for gaming server.)

For the SCSI..

I would go RAID0 across the whole mess - over more than one controller if possible (or channel at least) or RAID5 (probably the best idea for your situation.) 0+1 gets you little.
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post #8 of 16
I love it when you guys start talking SCSI....any ideas what HBA you are going to use--Adaptec is the leading name, but I used an LSI U160 with good results--and it's dead cheap.
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post #9 of 16
LSI does great work.

I am in the midst of putting together an old school 2940 Adaptec base system though
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post #10 of 16
Thread Starter 
I was planning to have the page file on the same drive as the OS...a 40 gig SATA2 7.2k RPM...but I could easily give it its own.

As for the controller card...I was thinking of this one

But any thing cheaper that will do the job would work LOL

I was planning on having 3 hard drives on each connector...hopefully with one set mirroring the other, but I guess I could throw and an old 300 gig IDE hard drive in there to use as a back up.
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